Dodge Caliber. Manual — part 905
U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
The PCM gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously
monitored.
Possible Causes
CAN C BUS CIRCUIT SHORTED
CAN C BUS CIRCUIT OPEN
ANTI-LOCK BRAKE (ABS) MODULE
POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Theory of Operation
The ABS Module sends vehicle speed information over the CAN C Bus circuit to the PCM.
Diagnostic Test
1.
ACTIVE DTC
NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The
screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting
any of the network components allows access to the source of the problem.
Ignition on, engine not running.
With a scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2.
DTC U0001-CAN C BUS IS ACTIVE IN THE PCM
With a scan tool, select View DTCs.
Is the DTC U0001-CAN C BUS Active in the PCM?
Yes
>> Refer to the Diagnostic Procedure for the U0001-CAN C BUS.
No
>> Go To 3
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
9 - 907
3.
ABS MODULE IS ACTIVE ON THE CAN C BUS
Using the Network Review Screen on the scan tool, verify that the ABS Module is active on the bus.
Is the ABS Module active on the bus?
Yes
>> Go To 4
No
>> Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for No
Response diagnostic procedures.
Perform BODY VERIFICATION TEST – VER 1.
4.
DTC U0001-CAN C BUS ACTIVE IN THE FCM
With the scan tool, select View DTCs in the FCM.
Is the DTC U0001-CAN C BUS Active in the FCM?
Yes
>> Replace the ABS Module in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
PM
U1417-IMPLAUSIBLE LEFT WHEEL DISTANCE SIGNAL RECEIVED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
The PCM gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously
monitored.
Possible Causes
VEHICLE SPEED SENSOR DTC ACTIVE IN ANTI-LOCK BRAKE MODULE
CAN C BUS CIRCUIT SHORTED
CAN C BUS CIRCUIT OPEN
ANTI-LOCK BRAKE (ABS) MODULE
POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Theory of Operation
The ABS Module sends an implausible distance signal over the CAN C Bus circuit to the PCM.
Diagnostic Test
1.
ACTIVE DTC
NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The
screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting
any of the network components allows access to the source of the problem.
Ignition on, engine not running.
With a scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2.
ABS MODULE IS ACTIVE ON THE CAN C BUS
Using the Network Review Screen on the scan tool, verify that the ABS Module is active on the bus.
Is the ABS Module active on the bus?
Yes
>> Go To 3
No
>> Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for No
Response diagnostic procedures.
Perform BODY VERIFICATION TEST – VER 1.
PM
ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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3.
DTCS STORED OR ACTIVE IN THE ABS MODULE
With the scan tool, select View DTCs in the ABS Module.
Are any DTCs active or stored in the ABS Module?
Yes
>> Refer to section 5 - BRAKES - ABS ELECTRICAL DIAGNOSTICS and perform the appropriate diag-
nostic procedure.
Perform ABS VERIFICATION TEST – VER 1
No
>> Go to 4
4.
ACTIVE DTCS IN THE TIPM
With the scan tool, select ECU View and select the TIPM.
With the scan tool, select View DTCs in the TIPM.
Are any ABS related DTCs active or stored in the TIPM?
Yes
>> Replace the ABS Module in accordance with the Service Information
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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