U11C2-LOST TRANSMISSION MESSAGE
U11C2-LOST TRANSMISSION MESSAGE
For a complete wiring diagram, refer to the Wiring Information.
- When Monitored:
-
Set Condition:
The Powertrain Control Module (PCM) has not received a Bus message from the Transmission Control Module (TCM) for approximately 500ms.
Possible Causes |
|---|
| CAN BUS CIRCUITS OPEN OR SHORTED |
| TRANSMISSION CONTROL MODULE (TCM) |
1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
| 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. |
| NOTE: | Make sure the battery is fully charged before proceeding. |
| 1. | Turn the ignition on. |
| 2. | With the scan tool, read active PCM DTCs. |
Is this DTC active?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. U0101-LOST COMMUNICATION WITH TCM ALSO SET
| 1. | With the scan tool continue reading DTCs. |
Is the U0101-LOST COMMUNICATION WITH TCM also set?
Yes
- Perform the U0101 Lost Communication with TCM diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing).
No
- (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).