Pinpoint Test AW: The SERVICE STEERING Message Is Inoperative/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AW: The SERVICE STEERING Message Is Inoperative/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the Electronic Power Assist Steering (EPAS) system status from the Power Steering Control Module (PSCM) (part of the steering gear) through the High Speed Controller Area Network (HS-CAN) communication bus. When the PSCM (Power Steering Control Module) detects a fault in the EPAS (Electronic Power Assist Steering) system, the PSCM (Power Steering Control Module) sends a message to the IPC (Instrument Panel Cluster) to turn on the SERVICE STEERING message in the message center.

This pinpoint test is intended to diagnose the following:

- EPAS (Electronic Power Assist Steering) system concern

- PSCM (Power Steering Control Module) (part of the steering gear)

- IPC (Instrument Panel Cluster)

PINPOINT TEST AW : THE SERVICE STEERING MESSAGE IS INOPERATIVE/ALWAYS ON

AW1 CHECK THE MESSAGE CENTER DISPLAY OPERATION

- Close all doors and the luggage compartment lid.

- Ignition ON.

- Open the driver door and observe the message center.

Does the message center display DRIVER DOOR AJAR?

Yes
GO to AW2.

No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.

AW2 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.

Is DTC U0131:00 recorded?

Yes
GO to Pinpoint Test BL. Pinpoint Test BL: DTC U0131:00

No
GO to AW3.

AW3 RETRIEVE THE RECORDED DTCs FROM THE PSCM (Power Steering Control Module) SELF-TEST

- Check for recorded DTCs from the PSCM (Power Steering Control Module) self-test.

Are any DTCs recorded?

Yes
REFER to Steering.

No
INSTALL a new steering gear. TEST the system for normal operation.