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I'm going to try to figure out how to post the wiring diagram on here.
U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED
Theory of Operation
The ABS Module sends vehicle speed information over the CAN C Bus circuit to the ECM.
When Monitored:
Ignition on.
Set Condition:
The ECM gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously monitored. One Trip fault.
Possible Causes
CAN C BUS CIRCUIT SHORTED
CAN C BUS CIRCUIT OPEN
ABS MODULE
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure).
1. ACTIVE DTC
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1. Ignition on, engine not running.
2. With a scan tool, read DTCs.
Is the U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED active at this time?
Yes
Go To 2
No
Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure).
2. U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT IS ACTIVE
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1. Continue reading DTCs.
Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE at this time?
Yes
(Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing) for the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT diagnostic procedure.
No
Go To 3
3. ABS MODULE IS ACTIVE ON THE CAN C BUS
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1. With the scan tool, select ECU View.
2. Verify that the ABS Module active on the bus.
Is the ABS Module active on the bus?
Yes
Go To 4
No
For No Response diagnostic procedures, (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) .
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
4. ACTIVE DTCS IN THE FCM (TIPM)
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1. With the scan tool, select ECU View and select FCM (TIPM).
2. With the scan tool, read active DTCs.
Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE in the FCM at this time?
Yes
Replace the ABS Module per Service Information.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure).
U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED
Theory of Operation
The ABS Module sends vehicle speed information over the CAN C Bus circuit to the ECM.
When Monitored:
Ignition on.
Set Condition:
The ECM gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously monitored. One Trip fault.
Possible Causes
CAN C BUS CIRCUIT SHORTED
CAN C BUS CIRCUIT OPEN
ABS MODULE
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure).
1. ACTIVE DTC
--------------------------------------------------------------------------------
1. Ignition on, engine not running.
2. With a scan tool, read DTCs.
Is the U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED active at this time?
Yes
Go To 2
No
Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure).
2. U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT IS ACTIVE
--------------------------------------------------------------------------------
1. Continue reading DTCs.
Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE at this time?
Yes
(Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing) for the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT diagnostic procedure.
No
Go To 3
3. ABS MODULE IS ACTIVE ON THE CAN C BUS
--------------------------------------------------------------------------------
1. With the scan tool, select ECU View.
2. Verify that the ABS Module active on the bus.
Is the ABS Module active on the bus?
Yes
Go To 4
No
For No Response diagnostic procedures, (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) .
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
4. ACTIVE DTCS IN THE FCM (TIPM)
--------------------------------------------------------------------------------
1. With the scan tool, select ECU View and select FCM (TIPM).
2. With the scan tool, read active DTCs.
Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE in the FCM at this time?
Yes
Replace the ABS Module per Service Information.
Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure).
