U1502

U1502-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM TCM



- When Monitored:
Continuously with the ignition on.

- Set Condition:
When the Anti-Lock Brake Module detects an incorrect CAN message from the Transmission Control Module (TCM).





1. CHECK IF TIPM CAN BUS DTCS ARE PRESENT
1. With the scan tool, read TIPM DTCs.

Are there any TIPM CAN BUS DTCs present?

Yes

- Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES Testing and Inspection.

No

- Go To 2

2. CHECK IF TRANSMISSION DTCS ARE PRESENT
1. With the scan tool, read Transmission DTCs.

Are there any Transmission DTCs present?

Yes

- Refer to the TRANSMISSION ELECTRICAL DIAGNOSTICS Testing and Inspection.

No

- Using the schematics as a guide, check the Anti-Lock Brake Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST ABS Verification Test.