Normal Operation

The PSCM communicates with the diagnostic scan tool and other module through the HS-CAN.

If the PSCM cannot communicate with the diagnostic scan tool or other modules, the EPAS system defaults to a pre-determined vehicle speed setting and the customer may experience a lack of assist or a heavy steering feel.

This generates a RVC for a new PSCM when directed to do so from pinpoint test.

AE1: CONFIRM PSCM REPLACEMENT WAS DIRECTED BY AN APPROPRIATE MANUAL TEST. 

Did a pinpoint test in  MODULE COMMUNICATIONS NETWORK  to install a new PSCM? 

Yes	No
INSTALL a new EPAS gear. REFER to Steering Gear  .	Go to AE2.

AE2: CHECK FOR CORRECT PSCM OPERATION 

Ignition OFF.

PSCM_A connector disconnected. (C2368A)

PSCM_B connector disconnected. (C2368B)

Disconnect all PSCM related in-line electrical connectors.

Using a good light source inspect the disconnected electrical connectors for the following:

• corrosion - install new connector or terminal and clean the module pins
• damaged or bent pins - install new terminals or pins
• pushed-out pins - install new pins as necessary
• spread terminals - install new terminals as necessary

Repair the connectors as necessary.

PSCM_A connector connected. (C2368A)

PSCM_B connector connected. (C2368B)

Connect all PSCM related in-line electrical connectors.

Operate the system and determine if the concern is still present.

Is the concern still present? 

Yes	No
INSTALL a new EPAS gear. REFER to Steering Gear  .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.