Pinpoint Tests 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 detects a fault in the EPAS system, the PSCM sends a message to the IPC to turn on the SERVICE STEERING message in the message center.

This pinpoint test is intended to diagnose the following:

- EPAS system concern
- PSCM (part of the steering gear)
- IPC


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

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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. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.

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AW2 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded DTCs from the IPC self-test.
- Is DTC U0131:00 recorded?

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

No
GO to AW3.

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AW3 RETRIEVE THE RECORDED DTCs FROM THE PSCM SELF-TEST

- Check for recorded DTCs from the PSCM self-test.
- Are any DTCs recorded?

Yes
REFER to Steering System - Electronic Power Assist Steering (EPAS) Testing and Inspection.

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

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