Pinpoint Tests AW: DTC U0131:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AW: DTC U0131:00

Normal Operation
- DTC U0131:00 (Lost Communication With Power Steering Control Module: No Sub-Type Information) - sets in the Instrument Panel Cluster (IPC) if data messages received from the Power Steering Control Module (PSCM) over the High Speed Controller Area Network (HS-CAN) are missing for greater than 5 seconds. For a complete list of all network messages, refer to Module Communications Network Testing and Inspection.

This pinpoint test is intended to diagnose the following:

- PSCM
- IPC

PINPOINT TEST AW: DTC U0131:00

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AW1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to AW2.

No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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AW2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the PSCM pass the network test?

Yes
GO to AW3.

No
REFER to Module Communications Network Testing and Inspection.

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AW3 RETRIEVE THE RECORDED DTCs FROM THE PSCM MODULE SELF-TEST

- Check for recorded DTCs from the PSCM module self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

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

No
GO to AW4.

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AW4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded DTCs from the IPC self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
For DTC U3003:16, GO to Pinpoint Test BD Pinpoint Tests BD: DTC U3003:16. For DTC U3003:17, GO to Pinpoint Test BE Pinpoint Tests BE: DTC U3003:17.

No
GO to AW5.

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AW5 RECHECK THE IPC DTCs

NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the Programmable Module Installation (PMI) or the PMI may not have been carried out.

- Clear the DTCs. Repeat the IPC self-test.
- Is DTC U0131:00 still present?

Yes
GO to AW6.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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AW6 CHECK FOR DTC U0131:00 SET IN OTHER MODULES

- Clear all DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test .
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0131:00 set in the ABS module?

Yes
INSTALL a new PSCM (part of the steering gear). REFER to Power Steering Steering Gear - Electronic Power Assist Steering (EPAS). CLEAR the DTCs. REPEAT the self-test.

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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