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 pre-determined vehicle speed setting ad 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 an appropriate service information pinpoint test.

• AF1: CONFIRM PSCM REPLACEMENT WAS DIRECTED BY A SERVICE INFORMATION TEST 

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

  Yes	No
  INSTALL a new EPAS column. REFER to STEERING COLUMN . Replace PSCM.	Go to AF2.

• AF2: CHECK FOR CORRECT PSCM OPERATION 

  Ignition OFF.

  PSCM_A connector disconnected. (C1467A)

  PSCM_B connector disconnected. (C1467B)

  PSCM_C connector disconnected.

  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. (C1467A)

  PSCM_B connector connected. (C1467B)

  PSCM_C connector connected.

  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 column. REFER to STEERING COLUMN . Replace PSCM.	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.