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Air Inlet Shutoff Threshold Reduction Switch /
OEM
/
Description:
An Air Inlet Shutoff (AISO) Threshold Reduction Switch
allows the operator to test the AISO system operation
by toggling a switch input to the ECM and manually
increasing the engine above 1500 RPM using the cab
accelerator pedal. When the conditions are met to
energize the relay (zero vehicle speed; transmission
in neutral, throttle at minimum; engine speed is over
1500 RPM), the fuel injectors are disabled and the Air
Inlet Shutoff Relay control on J2/P2: 4 is turned “On” for
approximately 1 second, supplying batter voltage at 2
Amps to drive the Air Inlet Shutoff relay.
When triggered, a diagnostic code 2813-31: Air Inlet
Shutoff will be logged.
Available:
EPA’07 and newer C7, C9, C13 & C15 on-highway engines
Range:
Engine Range
Cat
Default
EPA’07 and
newer C7, C9,
C13 & C15
None
J1/P1: 6, 7, 22, 23, 35, 40, 44,
45, 46, 47, 56, 58, 59, 60
None
Input Selection