P1381

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

This diagnostic will detect a serial data malfunction which could inhibit the transfer of ABS rough road data to the VCM.

ACTION TAKEN WHEN THE DTC SETS

The Malfunction Indicator Lamp (MIL) will not be illuminated. A history DTC P1381 will be stored.

CONDITIONS FOR CLEARING THE MIL/DTC

^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant temperature exceeds 70°C (160°F) during the same ignition cycle.

^ Use the scan tool Clear Information function.

^ Disconnect the VCM battery feed for 30 seconds.

TEST DESCRIPTION

Number(s) below refer to the step number(s) on the Diagnostic Table.

2. This step isolates an open serial data circuit from the Electronic Brake Control Module (EBCM) system.