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Air Inlet Shutoff Control Relay
Description:
The Air Inlet Shutoff Control Relay parameter is used to
identify the Air Inlet Shutoff Control Relay to the ECM.
Programming this parameter will enable the ECM to
control the relay via the connection specifi ed below.
The Air Inlet Shutoff device is used to prevent the engine
from over-speeding due to ingesting combustible gas
present in the ambient air. This feature shuts off the
inlet air to the engine by closing a spring-loaded fl ap on
the air inlet when the conditions are met to energize the
relay. These conditions are zero vehicle speed, battery
voltage on the Neutral Switch input, throttle at minimum,
and engine speed over 2500 rpm.
Note: High Side Driver capable of 1.5 Amps.
Available:
C11, C13, C15 PM MAR04 and after and all EPA’07 and
newer on-highway engines
(specifi c ratings only)
Range:
Engine Range Default
Pre-2007
None
J2/P2:13
J2/P2:13
EPA’07 and newer
C7, C9, C13 & C15
None
J2/P2: 4
None
Advantages:
Programming this parameter to the proper ECM
connection will give over-speed protection to an Air Inlet
Shutoff-equipped engine.
Disadvantages:
If the Air Inlet Shutoff Relay is energized too long,
serious damage to the relay can occur.
Recommendations:
✔ Only allow the Air Inlet Shutoff Relay to be
energized for between 1 and 2 seconds to prevent
damage to the relay.
Output Selection