U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
Continuously while the system is active.
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Set Condition:
An error message has been received over the BUS from the Transmission Control Module (TCM).
Possible Causes |
|---|
| CAN BUS OPEN OR SHORTED CONDITION |
| TRANSMISSION CONTROL MODULE (TCM) |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| NOTE: | Diagnose all CAN B and C communication DTCs before continuing. |
| 1. | Ignition on, engine not running. |
| 2. | With the scan tool, view DTCs. |
Is the status Active for this DTC?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. TCM COMMUNICATION RELATED DTCs IN OTHER MODULES
| 1. | With the scan tool, select Network Diagnostics. |
Is there more than one module with active DTCs “Logged Against” the TCM at this time?
Yes
- Replace and program the Transmission Control Module (TCM) in accordance with the Service Information.
- Perform the NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure).
No
- Replace and program the Powertrain Control Module in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Powertrain Control - Removal) .
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).