Normal Operation

When the ignition is turned ON a relay inside the PSCM is energized, which sends power to other portions of the module. The PSCM monitors this relay output and will set a DTC if output is not detected.

NOTE: If a damaged bellows boot(s) was discovered during Inspection and Verification and this pinpoint test DOES NOT lead to the installation of a new EPAS gear or bellows boot(s), then Go to Pinpoint Test K to address the damaged boot(s) before returning the vehicle to the customer.

D1: CHECK FOR RETURNING DTCS
Clear the PSCM DTCs.

Cycle the ignition to OFF and then back to RUN.

Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions.
D2: ATTEMPT TO RECREATE THE FAULT CONDITIONS
Park the vehicle in a cold or frosty environment and allow it to remain there overnight.

NOTE: Do not allow the vehicle to warm up before carrying out the PSCM self-test. Ignition ON, engine OFF.

Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions.