U1502-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM TCM
U1502-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM TCM
For a complete wiring diagram,refer to the Wiring Information.
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When Monitored:
Continuously, with ignition on.
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Set Condition:
If the Anti-Lock Brake Module detects bus messages from the Transmission Control Module (TCM) are of improper data length.
Possible Causes |
|---|
| WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE |
| DTCs RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| CAN C BUS CIRCUITS OPEN OR SHORTED |
| TRANSMISSION CONTROL MODULE (TCM) DTCs PRESENT |
| TRANSMISSION CONTROL MODULE (TCM) |
| ANTI-LOCK BRAKE SYSTEM (ABS) MODULE |
| 1. | Turn the ignition on. |
| 2. | With the scan tool, read and record ABS DTCs. |
| 3. | With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set. |
| 4. | With the scan tool, erase ABS DTCs. |
| 5. | Cycle the ignition switch. |
| 6. | With the scan tool, read ABS DTCs. |
Does this DTC reset?
Yes
- Go To 2
No
- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the ABS INTERMITTENT CONDITION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs
| 1. | With the scan tool, read all active DTCs from all CAN C Bus modules. |
| NOTE: | Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. |
Does the scan tool display any active DTCs related to the conditions listed above?
Yes
- Diagnose and repair the DTCs in this section. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Diagnosis and Testing).
No
- Go To 3
3. CHECK IF TCM DTCs ARE PRESENT
| 1. | With the scan tool, read TCM DTCs. |
Are any TCM DTCs present?
Yes
- Diagnose and repair the DTCs. (Refer to 28 - DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Diagnosis and Testing).
No
- Using the schematics as a guide, check the Anti-Lock Brake Module pins, terminals, and connectors for corrosion, damage, and terminal push out. Pay particular attention to all Communication circuits. If no problems are found, replace the Anti-Lock Brake Module in accordance with the Service Information.
- Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).