345B ELECTRICAL SCHEMATIC (AKASHI) USED IN SERVICE MANUAL RENR1980

©
1999 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR2989-02
December 1999
345B Excavator
Electrical System
5WS1-UP
6XS1-UP
2ZW1-UP
3MW1-UP
6MW1-UP
8KW1-UP
8RW1-UP
9CW1-UP
AAA
1
2
325-PK-14
200-BK-14
T
This indicates that the component does not have a wire connected to ground. It is
grounded by being fastened to the machine.
This indicates that the component has a wire connected to it that is connected to ground.
105-9344
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
Pin
Socket
Fuse
Component
Part Number
Pin or Socket
Number
Receptacle
Plug
Wire Gauge
Wire, Cable, or Harness
Assembly Identification
Wire Color
Normally closed switch that will open with an increase of a specific condition.
No circle indicates that the wire cannot be disconnected from the component.
Single Wire
Connector
Circuit Number
Identification
Ground
Connection
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Circuit Breaker
Symbol
Reed Switch - A switch whose contacts are controlled by a magnet. A magnet closes the
contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
Sender- A component that is used with a temperature or pressure gauge. The sender
measures the temperature or pressure. Its resistance changes to give an indication to
the gauge of the temperature or pressure.
Relay (Magnetic Switch) - A relay is an electrical component that is activated by electricity.
It has a coil that makes an electromagnet when current flows through it. The
electromagnet can open or close the switch part of the relay.
Solenoid - A solenoid is an electrical component that is activated by electricity. It has a
coil that makes an electromagnet when current flows through it. The electromagnet
can open or close a valve or move a piece of metal that can do work.
Harness And Wire Symbols
Electrical Schematic Symbols And Definitions
1
1
2
2
Typical representation of a Sure-Seal
connector. The plug and receptacle
contain both pins and sockets.
Typical representation of a Deutsch
connector. The plug contains all
sockets and the receptacle contains
all pins.
Code Description of Problems
1301 Engine oil pressure is too low.
1302 Engine coolant temperature is too high.
1303 Hydraulic oil temperature is too high.
1304 Air filter is clogged.
1305 Battery voltage is not normal.
2201 Governor actuator feedback sensor circuit is open or shorted to battery voltage.
2202 Governor actuator feedback sensor circuit is shorted to body ground.
2301 Governor actuator feedback signal is not stable.
2302 Governor actuator feedback signal deviates.
2303 Governor actuator does not move.
2304 Calibration data error.
3201 Monitor RAM is not normal.
4101 Electric power supply to the controller is too much (43 volts).
4102 Over-current in proportional reducing valve.
4103 Proportional reducing valve circuit is open.
4104 Monitor power supply (digital output) over current.
4105 Over-current in digital output (trenching solenoid).
4106 Over-current in digital output (fine control solenoid).
4107 Over-current in digital output (travel speed change solenoid).
4108 Over-current in digital output (travel alarm).
4109 Spare solenoid 1 (digital output) over current.
410A Over-current in digital output (swing brake solenoid).
410b Spare solenoid 2 (digital output) over current.
4201 Engine speed is not normal.
4202 Engine coolant temperature sensor is shorted to body ground.
4203 Hydraulic oil temperature sensor is shorted to body ground.
4204 PWM sensor of pump delivery pressure is shorted to body ground.
4205 Spare PWM sensor 1 is shorted to body ground.
4206 Spare PWM sensor 2 is shorted to body ground.
4207 PWM sensor of pump delivery pressure is open in circuit.
420A Fuel sensor is shorted to body ground
420b Fuel sensor is open or shorted to battery voltage.
420C Electric power supply is to low (below 23 volts).
420d Electric power supply is to high (above 32 volts).
420E Engine speed dial is not in one of the 10 specified positions.
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal).
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal).
4303 Engine stalls.
A201 Monitor communication is not normal.
A202 Monitor takes too much time to respond to controller's signal.
A203 Communication is abnormal in controller.
A20d ADEM communication disconnect.
Real Time Error Codes (Engine / Pump Control)
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6425 Engine Coolant Temperature (Start Aid)
38 ± 3° C
(100 ± 5° F)
27° C MIN
(81° F MIN)
Normally Closed
106-0179
Implement Pressure
Travel Pressure
(220.4 ± 14 psi)
1127 kPa MIN
(163.5 psi MIN)
Normally Open
106-0180 Boom Raise Pressure
2646 ± 196 kPa
(383.8 ± 28.4 psi)
2156 ± 196 kPa
(312.7 ± 28.4 psi)
Normally Open
106-0181
Auxiliary Hydraulic Pressure
Hammer Pressure
490 ± 49 kPa MAX
(71 ± 7.1 psi MAX)
290 kPa MIN
(42.1 psi MIN)
Normally Open
148-8893 Hydraulic Tank Pressure
50 ± 14 kPa
(7.3 ± 2.0 psi)
24 kPa MIN
(3.5 psi MIN)
Normally Closed
Code Description of Problems
b101 Injector Cylinder 1 open circuit.
b102 Injector Cylinder 1 short.
b103 Injector Cylinder 2 open circuit.
b104 Injector Cylinder 2 short.
b105 Injector Cylinder 3 open circuit.
b106 Injector Cylinder 3 short.
b107 Injector Cylinder 4 open circuit.
b108 Injector Cylinder 4 short.
b109 Injector Cylinder 5 open circuit.
b10A Injector Cylinder 5 short.
b10b Injector Cylinder 6 open circuit.
b10C Injector Cylinder 6 short.
b10d Throttle switch inputs are incorrect.
b10E Oil pressure open/short to + battery.
b10F Oil pressure short to ground.
b110 Oil pressure calibration required.
b111 Coolant temperature open/short to + battery.
b112 Coolant temperature short to ground.
b113 Battery voltage above normal.
b114 Battery voltage below normal.
b115 Loss of engine rpm signal.
b116 Analog sensor supply short to + battery.
b117 Analog sensor supply short to ground.
b118 Digital sensor supply short to + battery.
b119 Digital sensor supply short to ground.
b11A Shutdown inputs are incorrect.
b11b Turbo out pressure open/short to + battery.
b11C Turbo out pressure short to ground.
b11d Turbo out pressure calibration required.
b11E Atmospheric pressure open/short to + battery.
b11F Atmospheric pressure short to ground.
b120 Atmospheric pressure calibration.
b121 Check programmable parameters.
b122 Timing calibration required.
b123 Hydraulic oil temperature open/short to + battery.
b124 Hydraulic oil temperature signal short to ground.
b200 ADEM unknown error.
Real Time Error Codes (Engine Control)
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
3E-6332 Solenoid: Start Aid 6
4I-5394 Sender: Hydraulic Oil Temperature 6815 ± 681
102-8017 Resistor:
Backup
Main Relay
52.0 ± 2.6
107-7056 Solenoid: Fine Swing 34.0 ± 0.5
111-9916 Solenoid: Engine / Pump Control 11.7 ± 1.2
121-1490 Solenoid:
Level Finish
Trenching
32.0 ± 3.2
121-1491 Solenoid:
Hydraulic Lock
Swing Brake
Travel Speed
32.0 ± 3.2
163-6616 Resistor: Main Relay Attachment
(1) 48.0 ± 2.4
(2) 48.0 ± 2.4
¹ At room temperature unless otherwise noted.
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Distribution Circuits Accessory Circuits (cont'd)
101 RD Bat (+) A579 OR Wiper Motor +
103 RD Dome Lamp A580 BR Wiper Motor
105 RD Key Sw A581 GN Wiper Motor Raise
109 RD Alt Output (+) Term. A582 PU Wiper Motor Stop
110 RD Timer Relay A583 YL Power Window Interlock To Wiper Cont
111 YL Engine / Pump Control A584 BU Front Window Limit Sw To Wiper Cont
112 PU Main Power Rly Output A586 OR Wiper Sw To Wiper Cont
113 OR Opr Mon Panel (+) B Switched A587 YL Power Window Cont To Safety Sol Relay
114 RD Warning Horn (Forward) A588 GN Safety Sol Relay To Sol
115 PK Cab Lamp A589 OR Power Window Up
116 BR Switch Panel / Radio / (A/C) / Heater A590 BU Power Window Down
118 GY Washer / Wiper A591 PU Rear Window Limit Sw
120 YL 12V 5A Socket C537 GN A/C Photo Sensor (+) Sig
124 GN A/C C538 OR A/C Photo Sensor (-) Sig
129 BU Cigar Lighter
Lighting Circuits
135 BU 24V to 12V Converter Output 607 PK Flood Lamp - Front
140 BU Lubricator 615 YL Cab Flood Lamp/Rops
147 PU Flow Control / Fine Swing 616 BU Bucket Flood Lamp/Boom Flood Lamp
149 PU Boom Lamp
Control Circuits
150 RD Bat (+) 763 BU Torque Converter Sw
151 GN Neut Strt / Counterweight Removal 786 RD Eng Speed Cont - Hi Press Sw
152 BU Lower Washer / Wiper 788 YL Eng Speed (+)
154 RD Neut Strt Switch to Neut Strt Relay 791 RD Eng Speed Cont - Lo Sol
159 RD A/C Relay A701 GY Injector #1
160 PU Chassis Lamp A702 PU Injector #2
168 RD Refueling Pump A703 BR Injector #3
175 RD Fan A704 GN Injector #4
176 YL Aux Ckt A705 BU Injector #5
177 RD Main Brkr A706 GY Injector #6
180 GN Aux Ckt A746 PK Turbo Outlet Pressure
185 YL Backup EPR Valve A747 GY Atmospheric Pressure
189 RD Hydraulic Lock Switch/Solenoid A751 YL After Cooler Temp
191 WH Power Window A755 PK Throttle Sw #1
196 BU Inspection Lamp A756 BU Throttle Sw #2
Ground Circuits
A757 GY Throttle Sw #3
200 BK Main Chassis A758 BR Throttle Sw #4
201 BK Operator Monitor Return A762 PU Electronic Pump Cont Eng Speed Ground
235 BK Electronic Pump Ctrl Gnd A768 BU Pump Control Valve #1 (+)
Basic Machine Circuits
A769 GY Pump Control Valve #2 (-)
304 WH Starter Relay No. 1 Output A770 PK Electronic Pump Control Bypass Sw To Resistor
306 GN Starter Relay Coil To Neut Start Sw Or Key Sw A771 PU Float Sw
307 OR Key Sw To Neut Start Sw D789 WH Injector Common 1 & 2
308 YL Main Power Relay Coil D790 OR Injector Common 3 & 4
310 PU Start Aid Sw To Start Aid Sol D791 YL Injector Common 5 & 6
311 WH Start Aid Sol To Temp Sw E793 BU ATA Data Link (-)
315 GN Start Aid Breaker To Start Aid Relay E794 YL ATA Data Link (+)
320 RD Horn Relay Coil To Sw F717 YL Sw 4
321 BR Travel Alarm F718 BU Sw 5
322 GY Warning Horn (Forward) 892 BR CAT Data Link (-)
323 WH Fuel Pump Power 893 GN CAT Data Link (+)
325 PK Fuel Pump Relay Cut-Out 954 GN Hammer Sw A
329 YL Fuel Pump To Sw 993 BR Analog Sensor Common
365 YL Fuel Pump Relay To Switch 994 GY Oil Pressure (Filtered)
386 PK Air Shutoff Solenoid Enable 995 BU Coolant Temperature
Monitoring Circuits
996 GN Engine Speed/Timing Sensor Power
403 GN Alternator (R) Term. 997 OR Analog Sensor Power (+ 5V)
412 BU Opr Mon Cool Flow 998 BR Digital Sensor Return
430 BU Opr Mon Air Filter 999 WH Primary Camshft Speed/Timing
439 YL Lamp Indicator C912 GN Throttle Position
491 PK Hyd Oil Temp Sensor C967 BU Inlet Air Temperature
495 GN Fuel Level Signal K904 GN Pump Discharge - Signal
496 WH Opr Mon Panel Hyd Oil Level K905 RD Pump Discharge - (+) B
499 GY Opr Mon Implement Oil Filter K906 GN Swing Brake Sol - Signal
A499 BU Opr Mon Hyd Oil Press K907 BU Swing Brake Sol - (+) B
C468 BU Engine Oil Level K909 BU Backup Sw - (+) B
E455 BR Hydraulic Oil Filter K911 PK E/P Controller - RS485 (+)
F400 GY Low Oil Pressure K912 GN E/P Controller - RS485 (-)
Accessory Circuits
K915 GN Fine Swing Sw - E/P Controller
501 GN Wiper - Front (Low) K997 BU (+) V Sensor
506 PU Washer - Front L908 OR Controller RS-232C Tx
508 PU Radio Speaker - Left L909 BU Controller RS-232C Rx
509 WH Radio Speaker - Left (Common) L968 OR Electronic Pump Control Ps Valve (-)
511 BR Radio Speaker - Right L969 WH Electronic Pump Control Ps Valve (+)
512 GN Radio Speaker - Right (Common) L970 GY Electronic Pump Control To Sw Com Rtn
521 YL A/C Sw To Refrigerant Sw L971 GN Electronic Pump Control To Travel Press Sw
530 OR Washer Right L972 BU Low Idle Sw
535 BU Sw To Wiper Sw L973 GN Fine Swing Cont Relay To Sol Valve
575 YL Wiper - Aux (Park) L974 GN Electronics Pump Ctrl Boom Raise Press Sw
576 PK Wiper - Aux (Low) L976 GN Excavator Fuel Pump Switch
578 BU Washer - Aux L977 YL Trenching Sol
586 BR Aux Hyd - Close L978 GY Level Finish Sol
590 GY Wiper Sw To Intermittent Module L981 YL Hydraulic Lock Solenoid Relay
A537 PK Seat Heater L982 PK Counterweight Removal Control Solenoid
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Travel
B-7
3
Sensor - Oil Pressure
B-11
H
Alternator
E-11
4
Sensor - Pump Discharge Pressure
B-8
24
Antenna
C-7
5
Sensor - Speed / Timing
B-11
H
Battery
G-11, H-11
6
Sensor - Temperature
G-5
1
Block - Terminal
G-9
D
Solenoid - A/C Clutch
E-12
26
Breaker - Alternator
I-8
D
Solenoid - Counterweight Removal
B-10
22
Breaker 1
I-8
D
Solenoid - Eng/Pump Cont
A-8
F
Control - Eng/Pump
D-2, E-2, F-2
7
Solenoid - Fine Swing
C-7
28
Control - Power Window
C-6
15
Solenoid - Hammer Control
C-7
30
Control - Wiper
E-1
A
Solenoid - Hydraulic Lock
I-1
G
Converter
I-3
8
Solenoid - Injectors 1 - 6
A-11
H
Converter - 12V 5A
H-6
9
Solenoid - Level Finish
A-9
F
Engine Controller
A-12
H
Solenoid - Start Aid
E-12
31
Fuse - Block
I-4, I-5, I-6
C
Solenoid - Swing Brake
C-7
32
Horn
B-2
10
Solenoid - Travel Speed
A-8
F
Lamp - Boom
B-1
11
Solenoid - Trenching
A-8
F
Lamp - Cab
G-1
12
Speaker
C-5
33
Lamp - Chassis
A-2
13
Switch - Air Cleaner
E-12
35
Lamp - Dome
C-6
A
Switch - Aux Hydraulic Pressure
H-1
G
Lighter - Cigar
E-1
A
Switch - Backup EPR Valve
E-5
B
Meter - Service
F-12
A
Switch - Backup Thrt
D-5
B
Monitor
F-1
A
Switch - Boom Raise Press
C-8
34
Motor - Lower Washer
I-12
D
Switch - Coolant Level
F-12
36
Motor - Lower Wiper
I-1
G
Switch - Coolant Temp (Start Aid)
E-12
H
Motor - Starter
D-11
14
Switch - Counterweight Removal
B-10
29
Motor - Washer
H-12
D
Switch - Disconnect
I-9
D
Motor - Wiper
E-1
A
Switch - Engine Oil Level
D-12
37
Pump - Auto Lubrication
F-12
16
Switch - Fine Swing Control
D-4
B
Pump - Refueling
A-2
17
Switch - Hammer Control
D-4
B
Radio
I-3
C
Switch - Hammer Press
H-1
G
Relay - Air Conditioner
E-7
D
Switch - Horn
I-1
C
Relay - Boom Lamp
G-7
D
Switch - Hydraulic Oil Filter
A-5
E
Relay - Cab Lamp
G-7
D
Switch - Hydraulic Oil Level
A-5
E
Relay - Chassis Lamp
H-7
D
Switch - Hydraulic Tank Press
A-5
27
Relay - Horn
F-7
D
Switch - Implement Pressure
C-8
39
Relay - Hydraulic Lock Sol
H-7
D
Switch - Key
F-3
B
Relay - Main
F-8
D
Switch - Lower Washer
D-3
B
Relay - Neutral Start
F-7
D
Switch - Lower Wiper
D-3
B
Relay - Refueling Power
A-3
18
Switch - Neutral Start Limit
I-1
C
Relay - Refueling Start
A-3
19
Switch - One Touch Low Idle
F-3
B
Relay - Refueling Stop
A-3
20
Switch - Panel
F-3
B
Relay - Start
F-8
D
Switch - Power Window
D-3
B
Relay - Timer
E-7
D
Switch - Power Window Limit
B-6, G-1
A
Resistor - Backup
H-7
D
Switch - Refueling Level
A-5
41
Resistor - Main Relay
G-8
D
Switch - Refueling Start
A-4
42
Seat With Seat Heater
F-4
21
Switch - Refueling Stop
A-4
2
Sender - Hydraulic Oil Temp
A-5
E
Switch - Seat Heater
D-4
B
Sensor - A/C Photo
F-1
A
Switch - Start Aid
D-5
B
Sensor - Atm Pressure
B-11
H
Switch - Suction Line Limit
A-6
E
Sensor - Boost Pressure
B-11
H
Switch - Throttle Position
E-3
B
Sensor - Coolant Temp
B-11
H
Switch - Travel Press
C-8
38
Sensor - Engine Speed Pickup
D-12
25
Switch - Under Window Limit
F-1
A
Sensor - Fuel Level
B-5
23
Switch - Window Limit
D-1
A
Sensor - Fuel Temp
A-11
H
Unit - Air Conditioner
H-6
40
Sensor - Int Manifold Air Temp
B-11
H
Machine locations are repeated for components located close together.
A = Located in the cab
B = Located in the righthand console
C = Located in the lefthand console
D = Located on or near relay panel
E = Located near hydraulic oil tank
F = Located near pilot manifold
G = Located on or near bottom platform
H = Located near top of engine
Failure Mode Identifiers (FMI)¹
FMI No. Failure Description
0
Data valid but above normal operational range.
1
Data valid but below normal operational range.
2
Data erratic, intermittent, or incorrect.
3
Voltage above normal or shorted high.
4
Voltage below normal or shorted low.
5
Current below normal or open circuit.
6
Current above normal or grounded circuit.
7
Mechanical system not responding properly.
8
Abnormal frequency, pulse width, or period.
9
Abnormal update.
10
Abnormal rate of change.
11
Failure mode not identifiable.
12
Bad device or component.
13
Out of calibration.
14
Parameter failures.
15
Parameter failures.
16
Parameter not available.
17
Module not responding.
18
Sensor supply fault.
19
Condition not met.
20
Parameter failures.
¹The FMI is a diagnostic code that indicates what type of failure has
occurred.
Component identifiers (CID¹) for
Engine Control (MID² No. 036) And
Engine/Pump Control (MID² No. 105)
CID Component
0001
Injector Cylinder 1
0002
Injector Cylinder 2
0003
Injector Cylinder 3
0004
Injector Cylinder 4
0005
Injector Cylinder 5
0006
Injector Cylinder 6
0091
Throttle Signal Abnormal Output
0096
Fuel Level Sensor
0100
Oil Pressure Sensor
0110
Coolant Temperature Sensor
0167
Alternator Charging Sensor
0168
Electrical System Voltage
0172
Inlet Air Temperature Sensor
0174
Fuel Temperature Sensor
0190
Engine Speed Sensor
0253
Personality Mode
0261
Timing Calibration
0262
Analog Sensor Supply
0263
Digital Sensor Supply
0267
Shutdown Input Signal
0268
Programmable Parameters
0286
Oil Lamp
0273
Turbo Outlet Pressure Sensor
0274
Atmospheric Pressure Sensor
0374
Swing Brake Solenoid
0376
Travel Alarm
0581
Power Shift Solenoid
0582
Air Filter Differential Pressure Sensor
0583
Boom Raise Solenoid
0586
Invalid Engine Speed
0587
Engine Governor Position Sensor
0588
Monitoring System Display
0597
Hydraulic Pump Discharge Pressure Sensor
0598
Travel Speed Solenoid
0600
Hydraulic Oil Temperature Sensor
0688
Variable Horsepower Solenoid
0763
Trenching Solenoid
0799
Service Tool
¹ The CID is a diagnostic code that indicates which component is faulty.
² The MID is a diagnostic code that indicates which electronic control
module diagnosed the fault.
Schematic
Location
Machine
Location
CONN 1 C-12 46
CONN 2 C-12 14
CONN 3 C-12 46
CONN 4 C-12 46
CONN 5 C-12 46
CONN 6 C-10 46
CONN 7 F-10 D
CONN 8 F-10 D
CONN 9 F-10 D
CONN 10 F-10 D
CONN 11 G-10 D
CONN 12 G-10 D
CONN 13 G-10 D
CONN 14 G-10 D
CONN 15 H-9 D
CONN 16 H-9 D
CONN 17 G-9 D
CONN 18 ET and ECAP I-7 D
CONN 19 A-6 E
CONN 20 A-6 E
CONN 21 C-6 A
CONN 22 C-6 A
CONN 23 C-6 A
CONN 24 H-6 45
CONN 25 H-5 G
CONN 26 H-5 G
CONN 27 H-5 G
CONN 28 H-5 G
CONN 29 F-5 G
CONN 30 F-5 G
CONN 31 F-5 G
CONN 32 F-5 G
CONN 33 C-5 A
CONN 34 C-5 A
CONN 35 A-4 23
CONN 36 A-4 43
CONN 37 A-4 42
CONN 38 F-4 G
CONN 39 F-4 G
CONN 40 H-4 G
CONN 41 H-4 G
CONN 42 H-4 G
CONN 43 H-3 8
CONN 44 B-3 17
CONN 45 B-3 17
CONN 46 A-3 17
CONN 47 A-3 17
CONN 48 B-2 47
CONN 49 B-2 1
CONN 50 C-2 G
CONN 51 C-2 G
CONN 52 C-2 G
CONN 53 Factory Adjust D-2 2
The connectors shown in this chart are for harness to harness connectors.
Connectors that join a harness to a component are generally located at or near
the component. See the Component Location Chart.
Connector Number
Connector Location
Related Electrical Service Manuals
Title Form Number
3176C Engine Troubleshooting Guide
RENR1235
Alternator 100-5047:
100-5045 (M1)
100-5046 (N3)
SENR4130
SENR2082
Alternator 3E-7577 (26SI)
RENR1252
Engine and Pump Electronic Control System
RENR3760
Starting & Charging Systems
SENR1936
Starting Motor 6V-0890 (50MT)
SENR3860
A
3
4
5
6
8
9
10
11
12
14
15
16
B
C
D
E
1
2
17
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
38
34
36
7
F
39
40
41
42
43
44
45
46
47
A
3
4
5
6
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
22
24
25
26
27
28
29
30
31
32
37
35
33
34
36
7
F
39
40
41
42
43
44
33
H
G
H
G
10
11
12
Machine Harness Connector and Component Locations
47
8
38
23
45
13
18
33
E96828
177-RD-4
177-RD-4
177-RD-4
177-RD-4
103-RD
NOTE H: USE WITH COLD WEATHER FOR JAPAN.
200-BK-18
112-PU-18
200-BK-18
149-5082 HE04
NOTE G: NOT USE WITH COLD WEATHER FOR JAPAN.
AT
ATCH
MAIN RELAY
RESISTOR
163-6616
(NOTE H)
310-PU-18
116-BR-14
159-RD-14
578-BU
578-BU
307-OR
AP
116-BR-14
159-RD-14
200-BK
F400-GY-18
521-YL-18
412-BU-18
499-GY-18
110-RD-14
196-BU
K909-BU-18
A587-YL-18
A588-GN-18
615-YL
320-RD-18
A770-PK-18
892-BR-18
893-GN-18
998-BR-18
F718-BU-18
F717-YL-18
C912-GN-18
149-PU
115-PK
160-PU
115-PK
114-RD
103-RD
308-YL
124-GN
307-OR
A
B
C
200-BK-18
586-BR-18
147-PU-18
K904-GN-18
430-BU-18
K906-GN-18
763-BU-18
A771-PU-18
11
12
1
2
3
4
5
6
7
8
9
10
A499-BU-18
151-GN-18
K997-BU-18
189-RD-14
1
2
200-BK
200-BK-18
200-BK-18
150-RD-18
111-RD-14
154-RD-18
160-PU
506-PU-18
A768-BU-18
200-BK-18
200-BK-18
200-BK
200-BK-18
200-BK-18
506-PU-18
A770-PK-18
110-RD-14
320-RD-18
149-PU
615-YL
151-GN-18
A588-GN-18
A587-YL-18
147-PU-18
K909-BU-18
196-BU
L977-YL-18
L974-GN-18
140-BU
RD-00
RD-00
L971-GN-18
151-GN-18
189-RD-14
308-YL
124-GN
124-GN
K997-BU-18
L974-GN-18
L978-GY-18
L977-YL-18
L973-GN-18
151-GN-18
147-PU-18
200-BK-18
BK-00
RD-00
RD-00
BK-00
114-RD
321-BR-18
154-RD-18
111-RD-14
150-RD-18
786-RD-18
791-RD-18
791-RD-18
786-RD-18
C468-BU-18
A762-PU-18
788-YL-18
403-GN-18
495-GN-18
496-WH-18
491-PK-18
A769-GY-18
763-BU-18
L978-GY-18
A771-PU-18
K906-GN-18
430-BU-18
K904-GN-18
147-PU-18
L973-GN-18
586-BR-18
200-BK
CC
AA
MOTOR
WASHER
7T-8890
ATCH
LOWER WASHER
7T-8890
BATTERY
3T-5760
POS
NEGNEG
POS
ATCH
BATTERY
3T-5760
(NOTE B)
POS
NEG NEG
POS
L15
MOTOR
A A
GG (NOTE B)
L43
A
2
1
B
A
CHASSIS
FF (NOTE B)
BB
EE (NOTE B)
AA
Z
N
B
A
A
A
L46
L45
BK
BK
304-WH-8
101-RD-4
109-RD-4 109-RD-4
403-GN 403-GN
200-BK-4 200-BK-4
892-BR-18
893-GN-18
F718-BU-18
F717-YL-18
C468-BU-18
C912-GN-18
F400-GY-18
C468-BU-18
200-BK-18
E794-YL-18
E793-BU-18
A762-PU-18
788-YL-18
200-BK-18
311-WH-18
521-YL-18
892-BR-18
893-GN-18
998-BR-18
C468-BU-18
521-YL-18
521-YL-18
200-BK-14
893-GN-18
892-BR-18
200-BK
200-BK-18
412-BU-18
499-GY-18
412-BU-18
998-BR-18
F718-BU-18
F717-YL-18
C912-GN-18
F400-GY-18
412-BU-18
200-BK
E794-YL-18
403-GN-18
200-BK
499-GY-18
412-BU-18
F400-GY-18
521-YL-18
E793-BU-18
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
403-GN-18
788-YL-18
A762-PU-18
C468-BU-18
321-BR-18
140-BU
1
2
3
4
5
6
7
8
9
10
11
12
998-BR-18
F718-BU-18
F717-YL-18
C912-GN-18
L971-GN-18
A499-BU-18
892-BR-18
12
11
893-GN-18
200-BK-18
A762-PU-18
788-YL-18
C468-BU-18
101-RD-4
304-WH-8
109-RD-4
140-BU
200-BK-18
K997-BU-18
10
9
8
7
6
5
4
3
2
1
A499-BU-18
1
2
3
4
6
5
892-BR-18
893-GN-18
A768-BU-18
140-BU
607-PK
322-GY
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
616-BU
496-WH-18
491-PK-18
L977-YL-18
763-BU-18
L978-GY-18
A768-BU-18
A769-GY-18
K904-GN-18
430-BU-18
200-BK
140-BU
200-BK-18
430-BU-18
521-YL-18
430-BU-18
321-BR-18
200-BK-18
311-WH-18
311-WH-18
311-WH-18
311-WH-18
311-WH-18
311-WH-18
310-PU-18
310-PU-18
310-PU-18
308-YL
310-PU-18
308-YL
306-GN
386-PK
C
L52
WH-18
A762-PU-18
A/C CLUTCH
SOL
161-3632
ALT
R
B+
788-YL-18
ENG SPEED
PICKUP
6V-2455
ATCH
START AID
COOLANT TEMP SW
3E-6425
E
C
304-WH-8
C
1
2
2
1
ENG OIL
LEVEL SW
111-4759
101-RD-4
ALTERNATOR
100-5047 (50A)
3E-7577 (75A)
A762-PU-18
788-YL-18
C
C
C
C
1
2
BK-18
C
2
1
T~
109-RD-4
L51
MOTOR
CHASSIS
STARTER
MOTOR
6V-0890
304-WH-8
G
S
MTR BAT
101-RD-4
RD-00
RD-00
GROUND STRAP
128-8886
AA
EE(NOTE B)
C
B
B
ATCH AUTO
LUBRICATION PUMP
143-9543
COOLANT
LEVEL SW
109-9436
AIR CLEANER SW
162-6208
1
2
GROUND
ON(KEY)
B
B
B
2
1
ATCH
START AID
SOL
3E-6332
C
NOTE A
L43
B
BA
A
L45
L42
L41
L44
308-YL
311-WH-18
304-WH-8
101-RD-4
403-GN
109-RD-4
1
12
8
9
2
1
6
5
3
10
11
7
200-BK-18
200-BK-18
147-PU-18
200-BK-14
8
F400-GY-18
C468-BU-18
4
E794-YL-18
E793-BU-18
A751-YL A751-YL
C967-BU
C967-BU
995-BU
995-BU
994-GY
994-GY
997-OR 997-OR
997-OR
997-OR
997-OR
997-OR
997-OR
993-BR 993-BR
993-BR
993-BR
993-BR
993-BR
993-BR
A747-GY
A747-GY
A746-PK
A746-PK
999-WH
999-WH
998-BR
998-BR
996-GN
996-GN WH
BK
BK
BK
OR
OR
OR
OR
OR
OR
GN
GN
GN
YL
YL
YL
WH
WH
WH
BK
OR
D789-WH
D789-WH
D790-OR
D790-OR
D790-OR
A701-GY
D791-YL
D791-YL
D789-WH
A706-GY
A706-GY
A701-GY
A702-PU
A702-PU
A703-BR
12
A703-BR
A704-GN
A704-GN
11
9
A705-BU
7
A705-BU
1
998-BR-18
151-GN-18
7
1
2
3
4
5
6
8
4
3
2
1
5
6
200-BK-18
151-GN-18
10
892-BR-18
L982-PK-18
200-BK-18
A762-PU-18
893-GN-18
C912-GN-18
788-YL-18
L981-YL-18
151-GN-18
F718-BU-18
151-GN-18
147-PU-18
521-YL-18
200-BK-18
200-BK-18
F717-YL-18
200-BK-14
D791-YL
200-BK-14
200-BK-18
200-BK-18
H
G
I
F
E
D
C
B
A
H
G
I
F
E
D
C
B
A
L43
C B
B
1
C
B
NN
(NOTE E)
SS
1
4
2
B
2
ECM GND STRAP
ENG OIL PRESS
GND
USER DEFN SHUTDOWN
4
34
35
36
20
22
1
23
25
+5V
SENSOR COMMON
FUEL TEMP
INTAKE MANF AIR TEMP
COOLANT TEMP
OIL PRESSURE
ATM PRESSURE
BOOST PRESSURE
ENG SP/TMG
ENG SP/TMG COMMON
+V ENG SP/TMG
SENSOR
FUEL TEMP
SENSOR
INTAKE MANF
AIR TEMP
SENSOR
COOLANT TEMP
SENSOR
OIL PRESSURE
SENSOR
ATM PRESSURE
SENSOR
BOOST PRESSURE
SENSOR
SPEED/TIMING
ENG SP/TMG
ENG SP/TMG COMMON
+V ENG SP/TMG
BOOST PRESSURE
ATM PRESSURE
OIL PRESSURE
COOLANT TEMP
INTAKE MANF AIR TEMP
+5V
SENSOR COMMON
SENSOR COMMON
+5V
+5V
SENSOR COMMON
SENSOR COMMON
+5V
+5V
SENSOR COMMON
FUEL TEMP
SENSOR COMMON
+5V
C
B
A
A
B
C
C
B
A
B
C
A
A
B
C
C
DECEL
ACCEL
ATCH COUNTERWEIGHT
REMOVAL SW
114-0421
1
2
ATCH
CTWT REMOVAL
CONT SOL
123-2514
NN
(NOTE E)
NN
(NOTE E)
NN
(NOTE E)
INJECTOR 1
INJECTOR 2
INJECTOR 3
INJECTOR 4
INJECTOR 5
INJECTOR
SOL 6
INJECTOR
SOL 5
INJECTOR
SOL 4
INJECTOR
SOL 3
INJECTOR
SOL 2
1
A
B
C
B
26
27
28
30
29
1
37
2
23
20
8
14
2
3
30
36
31
32
33
2
1
1
2
2
1
INJECTOR COM 5&6
INJECTOR COM 1&2
INJECTOR COM 3&4
INJECTOR 6
INJECTOR
SOL 1
5
17
27
6
12
18
22
28
34
SENSOR COM
ENG CONT
1
2
2
1
A
39
40
10
11
21
8
4
29
3
37
L51
24
6
15
CAT DATA LINK (-)
CAT DATA LINK (+)
THROTTLE
+B
C
C
B
38
19
18
17
16
14
13
12
7
2
40
39
5
9
32
26
25
24
21
19
16
15
13
11
10
38
35
3
33
9
7
4
3
ATA DATA LINK (-)
ATA DATA LINK (+)
1
B
C
L44
L51
NOTE A
NOTE A
AF
154-RD-18
322-GY
A587-YL-18
200-BK
200-BK-18
200-BK-18
200-BK-18
111-RD-14
K909-BU-18
200-BK-18
200-BK-18
320-RD-18
616-BU
200-BK
615-YL
A587-YL-18
A588-GN-18
150-RD-18
151-GN-18
200-BK-18
892-BR-18
J
H
893-GN-18
200-BK-18
F
E
D
C
B
A
G
196-BU
893-GN-18
892-BR-18
E793-BU-18
E794-YL-18
A770-PK-18
K909-BU-18
K909-BU-18
K909-BU-18
A588-GN-18
150-RD-18
196-BU
151-GN-18
110-RD-14
154-RD-18
A770-PK-18
320-RD-18
615-YL
200-BK-18
A588-GN-18
616-BU
322-GY
E793-BU-18
E794-YL-18
149-PU-18
149-PU-18
607-PK-18
149-PU
200-BK-18
200-BK-18
607-PK
607-PK
114-RD
114-RD
114-RD
115-PK
115-PK
115-PK
115-PK
607-PK
615-YL
308-YL
308-YL
304-WH-8
109-RD-8
177-RD-14
177-RD-14
177-RD-14
101-RD-4
109-RD-4
112-PU-14
A
200-BK
110-RD-14
112-PU-14
112-PU-14
112-PU-14
109-RD-4
101-RD-4
6
2
4
3
5
1
A
200-BK-18
J
101-RD-4
101-RD-4
616-BU
151-GN-18
892-BR-18
893-GN-18
E794-YL-18
E793-BU-18
200-BK-18
189-RD-14
A587-YL-18
109-RD-8
304-WH-8
200-BK
177-RD-4
308-YL
A587-YL-18
A588-GN-18
615-YL
149-PU
320-RD-18
A770-PK-18
K909-BU-18
308-YL
189-RD-14
200-BK
308-YL
109-RD-4
K909-BU-18
K909-BU-18
A770-PK-18
E794-YL-18
E793-BU-18
892-BR-18
893-GN-18
149-PU
149-PU
196-BU
110-RD-14
196-BU
200-BK-18
189-RD-14
154-RD-18
111-RD-14150-RD-18
786-RD-18
RELAY PANEL
150-RD-18
786-RD-18
786-RD-18
786-RD-18
196-BU
109-RD-4
791-RD-18
177-RD-10
177-RD-14
177-RD-14
177-RD-14
177-RD-14
151-GN-18
791-RD-18 791-RD-18
791-RD-18
177-RD-4
177-RD-4
112-PU-4 112-PU-4
112-PU-4
112-PU-4
112-PU-4
177-RD-4
177-RD-4
111-RD-14
L52
116-BR-14
116-BR-14
200-BK-18
L49
112-PU-18
159-RD-14
308-YL-18
308-YL-18
308-YL
307-OR
307-OR
307-OR
386-PK
386-PK
306-GN
306-GN
L46
116-BR-14
308-YL
308-YL-18
160-PU-18
160-PU
160-PU
160-PU
160-PU
159-RD-14
159-RD-14
L47
L38
RELAY PANEL
A
L15
ET CONN AND ECAP CONN
CAB
LAMP RELAY
149-5050
NOTE A
NOTE A
DISCONNECT SW.
7N-0718
7N-0719(NOTE B)
ALT BREAKER
9S-4693
112-PU-4
YY
BACKUP
RESISTOR
102-8017
HYD LOCK SOL RELAY
149-5050
2
12
1
5
3
4
11
10
8
9
6
7
FOR
INSP LAMP
CHASSIS
LAMP RELAY
149-5050
4
5
2
3
8
6
1
7
11
12
9
BOOM LAMP RELAY
149-5050
10
VV
177-RD-4
80A
GG
(NOTE B)
CC
AD
AN
D (NOTE G)
AN (NOTE H)
A
A
A JJ
177-RD-4
177-RD-4
BUS-BAR
BREAKER 1
9S-4693
AD
JJ
80A
GND STRAP
132-1805
MAIN RELAY
RESISTOR
102-8017
(NOTE G)
177-RD-4
112-PU-4
E793-BU-18
E794-YL-18
893-GN-18
892-BR-18
616-BU
320-RD-18
109-RD-8
109-RD-4
A B
189-RD-14
308-YL
200-BK-18
200-BK-18
200-BK-18
168-RD-10
109-RD-8
110-RD-14
K909-BU-18
168-RD-10
304-WH-8
114-RD-18
114-RD-18
101-RD-4
154-RD-18
308-YL
111-RD-14
RELAY PANEL
112-PU-4
177-RD-4
200-BK-18
200-BK
308-YL-18
L49
308-YL
304-WH-8
114-RD
322-GY
200-BK-18
322-GY
ATCH
MAIN RELAY
159-9108
(NOTE H)
607-PK
112-PU-18
308-YL-18
308-YL
307-OR
386-PK
308-YL
306-GN
308-YL-18
200-BK-18
159-RD-14
116-BR-14
306-GN
386-PK
L47
L49
2
1
L42
L41
AC (NOTE G)
AT (NOTE H)
NOTE A
NOTE A
AB
L45
L46
OUT 1
+B
IN 2
IN 1
GND
OUT 2
VV
YY
5
1
8
2
10
11
3
4
9
TIMER RELAY
111-4870
7
6
12
NEUTRAL
START RELAY
149-5050
START RELAY
125-1302
HORN RELAY
149-5050
1
3
2
4
AB
XX
B
B
D (NOTE G)
AN (NOTE H)B
G
AK (NOTE G)
AP (NOTE H)
DIODE
121-4871
MAIN RELAY
165-4026
(NOTE G)
AC (NOTE G)
AT (NOTE H)
B
XX
L52
L52
386-PK
386-PK
306-GN
306-GN
BK
BK/PK
321-BR-18
321-BR-18
200-BK-14
607-PK
607-PK
200-BK-14
K997-BU-18
200-BK-18
A499-BU-18
K997-BU-18
K904-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
A769-GY-18
A768-BU-18
L978-GY-18
763-BU-18
L977-YL-18
200-BK-18
200-BK-18
200-BK-18
A499-BU-18
A768-BU-18
A769-GY-18
200-BK-18
168-RD-10
168-RD-10
L977-YL-18
763-BU-18
L978-GY-18
A768-BU-18
496-WH-18
616-BU
322-GY
495-GN-18
491-PK-18
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
L971-GN-18
A771-PU-18
K904-GN-18
L974-GN-18
K906-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
K997-BU-18
200-BK-18
200-BK-18
L978-GY-18
763-BU-18
L977-YL-18
200-BK-18
200-BK-18
200-BK-18
K906-GN-18
200-BK-18
499-GY-18
499-GY-18
A771-PU-18
L974-GN-18
K906-GN-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
200-BK-18
L971-GN-18
A771-PU-18
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
616-BU
322-GY
200-BK-18
321-BR-18
200-BK-18
200-BK-18
K904-GN-18
L973-GN-18
147-PU-18
200-BK-18
586-BR-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L971-GN-18
L29
2
1
B
ATCH
TRAVEL ALARM
3E-7738
L41
L42
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUND
+B
BK-18
BR-18
YL-18
B
C
B
A
CHASSIS
B
L28
BBBB
2
1
B
1
2
ATCH
HAMMER CONT
SOL
116-3413
ATCH
FINE SWING
SOL
107-7056
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
2
1
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
N
2
1
B
1
22
1
2
1
B
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
152-BU
147-PU-18
147-PU-18
120-YL
140-BU150-RD-18
150-RD-18
185-YL-18
118-GY
307-OR
120-YL
TRAVEL
PRESS SW
106-0179
512-GN-18
511-BR-18
509-WH-18
508-PU-18
200-BK-18
615-YL-18
200-BK
185-YL-18
113-OR-18
115-PK
129-BU
180-GN
114-RD
115-PK
615-YL
114-RD
114-RD
112-PU-14
124-GN
200-BK
200-BK-18
115-PK
200-BK
521-YL-18
REFUELING PUMP
30A
168-RD-10
154-RD-18
200-BK-18
111-RD-14
115-PK
147-PU-18
175-RD-14
175-RD-14
320-RD-18
151-GN-18
189-RD-14
196-BU
113-OR-18
118-GY
191-WH-14
152-BU
140-BU
K905-RD
105-RD
185-YL-18
150-RD-18
149-PU
110-RD-14
200-BK
150-RD-18
113-OR-18
175-RD-14
110-RD-14
105-RD
114-RD
K905-RD
149-PU
185-YL-18
113-OR-18
140-BU
120-YL
147-PU-18
147-PU-18
196-BU
176-YL
177-RD-14
K905-RD
112-PU-14
191-WH-14
129-BU
129-BU
149-PU
105-RD
112-PU-14
129-BU
315-GN-18
315-GN-18
315-GN-18
307-OR
307-OR
191-WH-14
103-RD-18
200-BK-18
112-PU-14
112-PU-14
112-PU-14
112-PU-14
103-RD
112-PU-4
177-RD-10
177-RD-14
177-RD-14
177-RD-14
509-WH-18
508-PU-18
511-BR-18
110-RD-14
512-GN-18
147-PU-18
C537-GN-18
118-GY
196-BU
175-RD-14
113-OR-18
152-BU
120-YL
140-BU
150-RD-18
175-RD-14
149-PU
124-GN
110-RD-14
111-RD-14
120-YL
147-PU-18
320-RD-18
151-GN-18
118-GY
154-RD-18
177-RD-14
150-RD-18
200-BK-18
200-BK
135-BU
120-YL
320-RD-18
154-RD-18
151-GN-18
200-BK
191-WH-14
K905-RD
615-YL
150-RD-18
105-RD
189-RD-14
124-GN
521-YL-18
113-OR-18
196-BU
120-YL
200-BK
112-PU-14
112-PU-14
C538-OR-18
189-RD-14
111-RD-14
112-PU-14
152-BU
200-BK
615-YL
112-PU-14
175-RD-14
200-BK
103-RD
124-GN
159-RD-14
159-RD-14
177-RD-10
116-BR-14
160-PU
113-OR-18
168-RD-10
Z
L46
116-BR-14
124-GN
159-RD-14
10A
103-RD
124-GN
160-PU
124-GN
113-OR-18
160-PU
116-BR-14
103-RD
159-RD-14
160-PU
315-GN-18
START AID
5A
10A
10A
10A
10A
E/P CONT
LOWER WASHER/WIPER
FINE SWING
FLOW CONT
CIGAR LIGHTER
12V 5A SOCKET
LUBRICATOR
AUX CKT
HYD LOCK SW
HYD LOCK SOL
5A
15A
10A
PWR WINDOW
WASHER/WIPER
A/C RELAY
5A
INSP LAMP
RADIO
BACKUP
J
A
9
1
5
11
7
3
HORN
L34
L22
10A
4
AUX CKT
7
KEY SW
15A
10A
10A
A
J
15A
10A
L17
L17
12
11
3
1
7
6
2
8
9
5
10
J
A
A
3
TEMP SENSOR
128-2163
4
1
6
15A
8
CHASSIS LAMP
2
FAN
J
A
BOOM LAMP
TIMER RELAY
3
12
4
10
2
6
8
10A
6
1
5
A/C UNIT
130-0250
ATCH
HEATER UNIT
139-7258
4
2
1
2
A
PLATFORMCHASSIS
GROUND STRAP
7G-1060
ATCH
ANTENNA CABLE
111-4846
CAB LAMP
FUSE
5A 139-5345
10A 9W-1442
15A 9W-1441
A
5
L
4
6
3
L
ATCH
12V SOCKET
121-0987
ATCH 12V5A
CONVERTER
119-1733
2
5
1
12V MEMORY
24V MEMORY
24V IN
GND
GND
12V OUT
8
6
7
4
1
5
2
3
FUSE BASE
111-4812
S
DOME LAMP
A
J
6
3
4
5
2
1
L15
L17
L24
L24
L36
E
L34
L34
L35
L20
L19
L3
L36
L36
L35
10A
5A
A/C /HEATER
SWITCH PANEL
10A
L45
307-OR
315-GN-18
310-PU-18
103-RD
310-PU-18310-PU-18
L28
L29
200-BK
103-RD
103-RD
315-GN-18315-GN-18
530-OR-18
576-PK
A537-PK
576-PK
575-YL
535-BU
535-BU
530-OR-18
530-OR-18
308-YL
575-YL
590-GY-18
501-GN-18
A586-OR-18
113-OR-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
A590-BU-14
A589-OR-14
K915-GN-18
147-PU-18
586-BR-18
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
K909-BU-18
K907-BU-18
A770-PK-18
615-YL
A586-OR-18
501-GN-18
590-GY-18
A589-OR-14
A590-BU-14
307-OR
615-YL
307-OR
191-WH-14
191-WH-14
L973-GN-18
L972-BU-18
L969-WH-18
L968-OR-18
F717-YL-18
439-YL-18
439-YL-18
535-BU
786-RD-18
530-OR-18
530-OR-18
615-YL
590-GY-18
200-BK
200-BK
615-YL
615-YL
325-PK-18
200-BK-18
200-BK-18
191-WH-14
103-RD
403-GN-18
403-GN-18
403-GN-18
403-GN-18
200-BK-18
200-BK-14
200-BK-14
403-GN-18
191-WH-14
191-WH-14
191-WH-14
191-WH-14
325-PK-18
200-BK-18200-BK-18
200-BK-18
491-PK-18
499-GY-18
496-WH-18
103-RD
103-RD
K997-BU-18
K997-BU-18
A499-BU-18
200-BK-18
535-BU
535-BU
152-BU
A499-BU-18
152-BU
152-BU
535-BU
A499-BU-18
200-BK-18
530-OR-18
200-BK-18
495-GN-18
2
3
4
1
1
4
3
2306-GN-18
325-PK-18
496-WH-18
200-BK-18
BK
YL
191-WH-14
200-BK-14
200-BK-14
K912-GN-18
K911-PK-18
403-GN-18
191-WH-14
K911-PK-18
K912-GN-18
A586-OR-18
590-GY-18
501-GN-18
200-BK-14
118-GY
615-YL
506-PU-18
403-GN-18
A583-YL-18
A584-BU-18
A584-BU-18
A583-YL-18
A589-OR-14
A590-BU-14
200-BK-14
103-RD
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
A587-YL-18
615-YL
506-PU-18
A587-YL-18
K997-BU-18
103-RD
A589-OR-14
A590-BU-14
590-GY-18
501-GN-18
A586-OR-18
615-YL
103-RD
508-PU-18
509-WH-18
511-BR-18
512-GN-18
118-GY
103-RD
103-RD
103-RD
506-PU-18
118-GY
200-BK-18
200-BK-14
200-BK-14200-BK-14
200-BK-18
200-BK
129-BU
129-BU
200-BK-18
129-BU
A586-OR-18
506-PU-18
501-GN-18
403-GN-18
200-BK-18
K911-PK-18
K912-GN-18
A583-YL-18
A584-BU-18
A591-PU-18 A583-YL-18
A587-YL-18
A584-BU-18
A584-BU-18
C537-GN-18
200-BK-18
A591-PU-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
C538-OR-18
103-RD
A587-YL-18
168-RD-18
322-GY
491-PK-18
200-BK-18
495-GN-18
616-BU
495-GN-18
200-BK-18
616-BU
168-RD-10
496-WH-18
607-PK
607-PK
168-RD-10
103-RD
103-RD
499-GY-18
WH-18
WH-18
WH-18
WH-18
E455-BR-18
E455-BR-18
491-PK-18
200-BK-18
322-GY
325-PK-18
365-YL-18
499-GY-18
200-BK-18
L976-GN-18
10A
5A
306-GN
A590-BU-14
AK (NOTE G)
AP (NOTE H)
306-GN306-GN
386-PK
A589-OR-14
386-PK
386-PK
2
1
HH BHH
1
SIGNAL3
2
4
+B
SIGNAL
GROUND
HYD OIL
FILTER SW
143-8037
AE
B AE
4
11
10
12
1
2
AE HYD TANK
PRESS SW
148-8893
8
9
7
6
1
2
5
3
A
E
1
2
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181
AE
HYD OIL
FILTER SW
143-8037
GROUND
SIGNAL
+B
4
2
1
AEAE
AE
HYD OIL
TEMP SENDER
4I-5394
FUEL LEVEL
SENSOR
105-9911
4
1 2
3
ATCH
REFUELING
LEVEL SW
5C-6108
2
1
HYD OIL
LEVEL SW
111-4760
2
T~
1
B
CAB
DOME LAMP
096-0721
2
3
4
5
6
1
8
7
ATCH SPEAKER(L)
7Y-5505
ATCH SPEAKER(R)
7Y-5505
2
1
8
3
5
4
7
6
ATCH POWER
WINDOW LIMIT SW
117-6306 (NOTE C)
ATCH POWER
WINDOW CONT
117-6305
7
6
5
4
3
8
1
2
5
4
3
2
1
6
F
F
F
F
F
F E E
A A A
L6
L7
ATCH
ANTENNA
106-0036
R. LIMIT
GND
F. LIMIT
+B
WIPER
NEUTRAL
SW. DOWN
SW. UP
F
L5
L35
L19
L20
L25
L3
L4
L19
L20
L25
L2
L27
L26
L35
L27
L26
F
A
L6
V
L5
AE
3
SIGNAL
1
2
U U
U
ATCH
REFUELING
PUMP SW(NO)
6T-9442
P
T
T
T
ATCH
REFUELING
PUMP SW(NC)
9X-4184
P
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-18
A590-BU-14
A589-OR-14
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
191-WH-14
308-YL
791-RD-18
578-BU
578-BU
A537-PK
615-YL
2
1
586-BR-18
535-BU
A770-PK-18
A769-GY-18
A768-BU-18
K906-GN-18
615-YL-18
L973-GN-18
535-BU
791-RD-18
786-RD-18
105-RD
185-YL-18
615-YL
147-PU-18
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
307-OR
308-YL
K909-BU-18
200-BK
L969-WH-18
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
200-BK200-BK-18
615-YL-18
615-YL-18
200-BK-18
L973-GN-18
K907-BU-18
200-BK-18
200-BK-18
615-YL-18
615-YL-18
586-BR-18
147-PU-18
615-YL-18
K909-BU-18
200-BK-18
200-BK-18
200-BK-18
185-YL-18
F718-BU-18
998-BR-18
K915-GN-18
998-BR-18
A769-GY-18
F718-BU-18
615-YL-18
A768-BU-18
K906-GN-18
998-BR-18
615-YL-18
185-YL-18
615-YL-18
615-YL-18
200-BK-18
185-YL-18
535-BU
F717-YL-18
F718-BU-18
F717-YL-18
308-YL
105-RD
124-GN
A A
7
8
1
6
5
4
3
2
H
H
6
8
1
7
4
5
3
2
L18
ATCH
SEAT WITH
SEAT HEATER
150-2201
12
1
11
8
2
12
9
10
11
4
3
2
1
9
8
2
7
6
5
4
3
10
1
4
5
6
1
7
3
3
HH
AA
H
2
A
H
4
A
L4
L25
L33
L21
L32
L31
L10
L9
L8
H
L32
L31
HH
L33
L33
L33
L20
L19
L3
L25
L4
L32
L31
ATCH START
AID SW
111-4784
(NOTE F)
H
L11
ATCH FINE
SWING CONT SW
111-4788
TT
H
ATCH HAMMER
CONT SW
111-4787
H
BACKUP
EPR VALVE SW
114-0421
H H
200-BK
200-BK
200-BK
200-BK
615-YL
615-YL
315-GN-18
310-PU-18
103-RD
615-YL
954-GN-18
954-GN-18
954-GN-18
235-BK-14
200-BK-14
A587-YL-18
506-PU-18
403-GN-18
A771-PU-18
788-YL-18
A762-PU-18
763-BU-18
C468-BU-18
321-BR-18
491-PK-18
495-GN-18
430-BU-18
496-WH-18
K904-GN-18
235-BK-14
200-BK-14
586-BR-18
K906-GN-18
A768-BU-18
A769-GY-18
A770-PK-18
K909-BU-18
A588-GN-18
A588-GN-18
196-BU
151-GN-18
118-GY
512-GN-18
511-BR-18
509-WH-18
508-PU-18
113-OR-18
185-YL-18
147-PU-18
147-PU-18
147-PU-18
147-PU-18
147-PU-18
140-BU
1
2
151-GN-18
196-BU
110-RD-14
200-BK
103-RD
200-BK
200-BK 499-GY-18
F400-GY-18
412-BU-18
140-BU
200-BK-18
200-BK-18
200-BK
147-PU-18
200-BK-18
F717-YL-18
615-YL
615-YL
200-BK
200-BK
129-BU
177-RD-4
168-RD-10
168-RD-10
168-RD-10
105-RD
200-BK
K997-BU-18
159-RD-14159-RD-14
113-OR-18
L973-GN-18
L971-GN-18
A499-BU-18
115-PK
152-BU
521-YL-18
103-RD
124-GN
L977-YL-18
320-RD-18
320-RD-18
103-RD
200-BK
615-YL
110-RD-14
116-BR-14
L974-GN-18
L978-GY-18
998-BR-18
116-BR-14
F718-BU-18
135-BU-18
200-BK-18
113-OR-18
115-PK
191-WH-14
168-RD-10
189-RD-14
200-BK-18
113-OR-18
135-BU-18
168-RD-10
ANTENNA
135-BU-18
200-BK-18
C912-GN-18
149-PU
791-RD-18
786-RD-18
521-YL-18
147-PU-18
308-YL
147-PU-18
892-BR-18
149-PU
200-BK
200-BK-18
615-YL
615-YL
114-RD
615-YL
A588-GN-18
200-BK-18
954-GN-18
114-RD
200-BK-18
200-BK-18
A584-BU-18
A584-BU-18
615-YL-18
K905-RD
200-BK-18
160-PU
111-RD-14
ATCH RADIO FOR OUTSIDE JAPAN
189-RD-14
160-PU
200-BK-18
ATCH RADIO FOR JAPAN
150-RD-18
200-BK-18
200-BK-18
C
B
A
320-RD-18
154-RD-18
111-RD-14
150-RD-18
151-GN-18
200-BK-18
200-BK-18
113-OR-18
103-RD-18
200-BK-18
L970-GY-18
200-BK-18
2
4
150-RD-18
154-RD-18
1
3
200-BK-14
508-PU-18
509-WH-18
511-BR-18
512-GN-18
200-BK-14
615-YL
200-BK
154-RD-18
147-PU-18
893-GN-18
576-PK
535-BU
575-YL
307-OR
535-BU
575-YL
576-PK
A/C
RELAY
149-5050
578-BU
IGN
M MF
Y
2
1
3
4
7
6
8
5
Y
TO RADIO
CONVERTER
134-1346
B
C
A
IN (+BAT)
GND
OUT (+12V)
W
PLATFORM
A
ATCH
AM RADIO
136-4006
L18
L3
L19
L21
L20
Y
L22
L17
L15
L22
A
ATCH
HAMMER
PRESS SW
106-0181
1
2
2
1
L21
L20
J
PLATFORM
A
ATCH POWER
WINDOW LIMIT SW
117-6306 (NOTE C)
L19
J
HYD
LOCK SOL
121-1491
L15
L17
S
L14
SPEAKER (+)
SPEAKER (-)
BUCK UP
GND
SPEAKER (+)
ACC (+)
ILLUMI (+)
SPEAKER (-)
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
L15
L21
L19
L3
A
L20
L21
L19
L3
L18
L3
L18
L7
L14
F
OPERATOR STATION
ATCH
CAB LAMP
140-0853
ATCH
AM/FM RADIO
153-2444
MM
2
1
ATCH LOWER
WIPER MOTOR
113-3452
+
S +1
-
MOTOR
FF
ATCH
AUX HYD
PRESS SW
106-0181
A
307-OR
A586-OR-18
615-YL
530-OR-18
BACKUP
THRT SW
110-7884
578-BU
ATCH SEAT
HEATER SW
111-4783
H
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
499-GY-18
200-BK
200-BK
K997-BU-18
Y/G
Y/W
200-BK-14
535-BU
152-BU
439-YL-18
535-BU
954-GN-18
C
B
A
403-GN-18
A499-BU-18
439-YL-18
L972-BU-18
A755-PK-18
L968-OR-18
763-BU-18
A756-BU-18
A771-PU-18
L969-WH-18
L971-GN-18
A757-GY-18
L970-GY-18
788-YL-18
A762-PU-18
430-BU-18
321-BR-18
F400-GY-18
491-PK-18
495-GN-18
A758-BR-18
496-WH-18
L977-YL-18
235-BK-18
892-BR-18
893-GN-18
K997-BU-18
235-BK-18
C468-BU-18
K907-BU-18
K915-GN-18
K911-PK-18
K912-GN-18
L909-BU-18
L908-OR-18
K904-GN-18
235-BK-18
L974-GN-18
200-BK
200-BK-18
308-YL-18
200-BK-18
200-BK-18
530-OR-18
200-BK-18
A590-BU-14
A589-OR-14
200-BK-18
200-BK-18
615-YL-18
615-YL-18
535-BU
575-YL
200-BK-18
200-BK-18
191-WH-14
200-BK-18
200-BK-18
L978-GY-18
615-YL-18
615-YL-18
615-YL-18
576-PK
C912-GN-18
200-BK
200-BK
103-RD
A758-BR-18
118-GY
A757-GY-18
129-BU
A756-BU-18
A755-PK-18
308-YL
506-PU-18
A586-OR-18
501-GN-18
K912-GN-18
A584-BU-18
201-BK-18
103-RD
5
4
3
2
1
412-BU-18
200-BK-18
200-BK
A582-PU
200-BK-18
A581-GN
A583-YL-18
A580-BR
K911-PK-18
590-GY-18
403-GN-18
C538-OR-18
C537-GN-18
200-BK-14
200-BK-18
A584-BU-18
201-BK-18
200-BK-18
A579-OR
L972-BU-18
200-BK-18
200-BK-18
113-OR-18
791-RD-18
786-RD-18
501-GN-18
590-GY-18
105-RD
308-YL
6
K905-RD-18
K905-RD-18
307-OR
200-BK
W.INT (6)
WASH
E/P CONT
157-3191
NOTE A
ATCH UNDER
WINDOW LIMIT SW
129-6466
E E
MONITOR +B OUT
FACTORY
ADJ CONN
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
ECM THRT
EPR VALVE (+)
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SW
TRAVEL SPEED SOL
ENG SPEED SENSOR (-)
ENG SPEED SENSOR (+)
TRENCHING SOL
IMPLEMENT SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
FRONT PUMP PRESS SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
COOLANT SENSOR
9
20
10
28
31
26
13
30
29
35
40
2
6
39
6
24
25
22
15
ALTERNATOR (R TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK) 7
8 RS485 - (LH JOYSTICK)
RS485 + (PEDAL) 9
10
RS485 + (SEMI AUTO)
RS485 - (PEDAL)
RS485 + (RADIO CONT)17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18
RS232C (RX)
TRAVEL SW
HYD OIL FILTER INDICATOR
DIGITAL OUT (-)
18 RS485 - (RADIO CONT)
CAT DATA LINK (+)19
+B
+B
AIR INDICATOR
FINE SWING SW
ELEC GOV THROTTLE DIAL
RS485(+)
BOOM RAISE PRESS SW
LEVEL FINISH SOL
ENG POWER CHANGE SOL
OPTION PRESS SW
32
33
25
KEY SW ON
CAT DATA LINK (-)
26
12
40
2
4
28
27
LOW IDLE SW
21
20
1
11
22
34
3
24
23
14
13
16
15
5
36
35
29
31
30
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TX)
KEY SW START
A
OPTION SW37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
32
33
DIGITAL OUT (-)
DIGITAL OUT (-)
14
11
34
JOY STICK +B OUT
H
ATCH LOWER
WIPER SW
111-4785
ATCH LOWER
WASHER SW
111-4786
ATCH POWER
WINDOW SW
111-4789
HH
H
L6
E
CAB
E
E
E
+
H
ONE TOUCH
LOW IDLE SW
128-2134
+B
L. CHASSIS
L. BOOM
HYD TK IND
WASH
W. LOW
W.INT (3)
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
W. CCW
W. CW
REV
STOP
GND
INT (6)
ACC
WA+
LOW
RISE.S
INT (3)
WIPER CUT
WIPER
MOTOR
122-9603
WIPER CONT
155-7042
L11
L11
L11
L10
L9
L8
L10
L9
L8
E
L1
A
A
E
L7
L7
WINDOW
LIMIT SW
124-3974 (NOTE D)
S4
S3
S2
S1
COM
OPTION SW
H
MONITOR
151-9385
SWITCH PANEL
153-2501
KEY SW
9G-7641
H
A/C PHOTO
SENSOR
128-2162
-
SERVICE
METER
6T-7337
THROTTLE
POS SW
106-0107
MOTOR
EE
E
R
C
S
B
E
OFF
ON
ST
CIGAR
LIGHTER
9W-0335
D (NOTE G)
AN (NOTE H)
308-YL
308-YL-18
200-BK-18
200-BK-18
325-PK-18
235-BK-14 235-BK-18
235-BK-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K912-GN-18
K911-PK-18
K915-GN-18
K907-BU-18
403-GN-18
K904-GN-18
496-WH-18
430-BU-18
495-GN-18
491-PK-18
321-BR-18
C468-BU-18
763-BU-18
A762-PU-18
788-YL-18
A771-PU-18
499-GY-18
C912-GN-18
K997-BU-18
K997-BU-18
K997-BU-18
K997-BU-18
K997-BU-18
L970-GY-18
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
L969-WH-18
L968-OR-18
L972-BU-18
365-YL-18
329-YL-18
329-YL-18
323-WH-14
323-WH-14
200-BK-18
200-BK-18
325-PK-18
168-RD-14
168-RD-10
200-BK-10
200-BK-10
200-BK-18
200-BK-18
200-BK
200-BK
200-BK
200-BK
200-BK
322-GY
322-GY
322-GY
329-YL-18
A499-BU-18
439-YL-18
200-BK-14
365-YL-18
892-BR-18
954-GN-18
K905-RD-18
200-BK
168-RD-18
168-RD-18
168-RD-18
168-RD-18
168-RD-18
200-BK
F400-GY-18
L976-GN-18
L976-GN-18
L976-GN-18
365-YL-18
200-BK
K905-RD
322-GY
K905-RD
322-GY 322-GY
200-BK
200-BK
200-BK
200-BK
616-BU
607-PK
616-BU
168-RD-10
607-PK
616-BU
616-BU
200-BK
L976-GN-18
OPERATOR STATION
607-PK
L976-GN-18
200-BK
616-BU
893-GN-18
412-BU-18
K905-RD-18
HH
1
ATCH
REFUELING
POWER RELAY
165-4026
X
X
4
AC
YY
VV
AK
403-GN-18
P
2
AF
AE
NOTE A
NOTE A: THE FOLLOWING WIRE PAIRS MUST BE TWISTED
1
NN
NOTE E: USE WITH CTWT REMOVAL.
G
NOTE F: NOT USE WITH FINE SWING CONT. SW.
B
200-BK-14
V
Z
NOTE B: USE WITH COLD WEATHER.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
THIS SCHEMATIC IS FOR THE 345B EXCAVATOR.
GG
FF
EE
CC
BB
AA
170-6995 I-8
170-6994 I-8
150-6966 I-8
150-6967 I-8
116-0242 I-9
116-0080 G-11
128-8898 G-11
(NOTE H)
(NOTE G)
(NOTE B)
(NOTE B)
(NOTE B)
125-4727 I-9
116-0080 H-11
128-8884 H-12
CABLE AS.
P
WIRE AS.
N
M
L
K
J
H
F
E
D
C
IDENT PART NO. LOC
HARNESS AS.
Y
XX
TT
S
T
A
X
W
U
167-3491 G-9
150-6961 A-3
117-2763 A-12
140-0918 A-5
128-8912 B-10
121-1044 A-6
145-0551 C-7
116-0103 H-3
138-5127 H-3
116-0098 A-4
NOTE D: NOT NECESSITY FOR ELECTRIC OPENABLE WINDSHIELD.
NOTE C: USE WITH ELECTRIC OPENABLE WINDSHIELD.
P
125-4868 B-2
167-3538 F-10
132-1857 C-7
116-0243 G-1
116-0258 H-6
125-4848 B-2
167-3536 H-5
167-3535 F-4
167-3532 C-6
167-3526 C-5
167-3476 G-9
(NOTE H)
(NOTE E)
(NOTE G)
128-8900 C-12
111-4841 H-4
116-0096 A-4
167-3537 C-2
167-3591 A-3
X
A
A
A
A
A
AD
AB
JJ
A
12
7
8
9
10
1
11
6
5
4
3
2
1
6
2
5
3
4
2
3
4
5
6
1
8
7
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
B
X
DIODE
121-1022
SS
167-3493 F-8
132-1827 A-4
167-3477 F-8
149-5060 F-8
116-0237 D-4
(NOTE H)
(NOTE G)
(NOTE F)
167-3479 I-8
149-5059 F-8
167-3478 I-8
132-1845 C-10
GB
K
2
3
2
B
1
L7
L6
ATCH
REFUELING
START RELAY
149-5050
G
G
X
B
L2
L1
B
ATCH
BOOM LAMP
153-2521
L4
CHASSIS
K
ATCH
REFUELING PUMP
165-1436
HORN
1R-9548
K
P
P
+
-
1
2
ATCH
REFUELING
STOP RELAY
149-5050
P
P
L2
L3
L2
CHASSIS
LAMP
153-2523
153-2521 (NOTE E)
ATCH
BOOM LAMP
153-2521
2
1
L7
HORN
1R-9549
L6
(892-BR, 893-GN) (E793-BU, E794-YL)
AT LEAST 1 TURN PER 25MM.
E94370
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
TO MACHINE STRUCTURE
9 8 7 6 5 4 3 2
1
12
11
10
9 8 7 6 5 4 3 2
1
12
11
10
307-OR
200-BK-18
CONN 1
CONN 2
CONN 3
CONN 4
CONN 5
CONN 6
CONN 7
CONN 8
CONN 9
CONN 10
CONN 11
CONN 12
CONN 13
CONN 14
CONN 15
CONN 16
CONN 17
CONN 18
CONN 19
CONN 20
CONN 21
CONN 22 CONN 23
CONN 33 CONN 34
CONN 24
CONN 25
CONN 26 CONN 27
CONN 28
CONN 40
CONN 41
CONN 42
CONN 43
CONN 35
CONN 36
CONN 37
CONN 29
CONN 30
CONN 31
CONN 32
CONN 38
CONN 39
CONN 44 CONN 45
CONN 46
CONN 47
CONN 48
CONN 49
CONN 50
CONN 51
CONN 52
CONN 53
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITORING CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE CONTROL CIRCUIT.
START AID CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
CIRCUIT CONNECTED
BLADE, SPADE, RING,
OR SCREW TERMINAL