24-109
Rough road condition signal, checking
ABS control module with ABS/EDL
Notes:
Misfires can result in malfunctions such as
"Combustion misfire" being recorded in DTC
memory due to road wheel malfunctions.
If the ABS control module recognizes a free
turning wheel, it generates a rough road signal.
If the Engine Control Module (ECM) recognizes
the rough road signal, misfire recognition is
switched off in the ECM.
The rough road signal is created to check
whether DTC 18014 "Rough Road Spec Engine
Torque ABS-SG Electrical Malfunction" is
stored in DTC memory. The "Combustion
misfire" malfunction results from this signal and
can be ignored.
The rough road signal is monitored by the
ECM.
Checking requirement
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24-110
- Find and eliminate open or short circuit; repair
as necessary.
If wiring is OK:
- Replace ABS control module.
If the ABS control module is OK, but the
malfunction is still occurring:
- Replace ECM page 01
-265
.
ABS control module with ABS/EDL/ASR
Notes:
The torque signal is monitored by the
"Automatic Traction Control" Control Module
and by the ECM.
Repair Manual, Brake System On Board
Diagnostic (OBD), Repair Group 01
Vehicles with automatic traction control (ASR)
can be recognized by the ASR indicator light in
the instrument cluster or by control module
identification displayed during the ABS On
Board Diagnostic program sequence.
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