U1418

U1418-IMPLAUSIBLE RIGHT WHEEL DISTANCE SIGNAL RECEIVED





For the Engine circuit diagram, Refer to SCHEMATICS AND DIAGRAMS.

When Monitored
Ignition on.

Set Condition
The PCM gets an implausible signal over the CAN C circuit from the ABS Module or FCM (NON-ABS). The circuit is continuously monitored.

Possible Causes
- VEHICLE SPEED SENSOR FAULT ACTIVE IN ANTI-LOCK BRAKE MODULE
- CAN C BUS CIRCUIT SHORTED
- CAN C BUS CIRCUIT OPEN
- ABS MODULE
- PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Theory of Operation
The ABS Module or FCM (NON-ABS) sends an implausible distance signal over the CAN C Bus circuit to the PCM.

Diagnostic Test
1. ACTIVE DTC





NOTE: Diagnose all CAN B and C communication failures before continuing.

Ignition on, engine not running.
With a scan tool, read DTCs.

Is the U1418-IMPLAUSIBLE RIGHT WHEEL DISTANCE SIGNAL RECEIVED active at this time?
Yes >> Go To 2
No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
2. ABS MODULE IS ACTIVE ON THE CAN C BUS
With the scan tool, select ECU View.
Verify that the ABS Module active on the bus.

Is the ABS Module active on the bus?
Yes >> Go To 3
No >> Refer to ELECTRONIC CONTROL MODULES for No Response diagnostic procedures.
Perform BODY VERIFICATION TEST VER - 1. Body Verification Test
3. DTCS STORED OR ACTIVE IN THE ABS MODULE/FCM (NON-ABS)
Check for wheel speed DTCs in the ABS Module or FCM (NON-ABS).

Are any DTCs; active or stored in the ABS Module/FCM?
Yes >> Perform the diagnostics for the DTCs.
Perform VERIFICATION TEST - VER
No >> Go to 4
4. ACTIVE DTCS IN THE FCM
With the scan tool, select ECU View and select FCM. With the scan tool, read active DTCs.

Are any Communication DTCs; active in the FCM relating to the ABS System?
Yes >> Refer to ELECTRONIC CONTROL MODULES for the diagnostic procedures.
Perform BODY VERIFICATION TEST VER - 1. Body Verification Test
No >> Replace and program the Powertrain Control Module per Service Information.
Perform POWERTRAIN VERIFICATION TEST - VER 5.