Pinpoint Test AS: DTC U0131:87

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AS: DTC U0131:87

Normal Operation
- DTC U0131:87 (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 more 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 (part of the steering gear)
- IPC

PINPOINT TEST AS: DTC U0131:87

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AS1 VERIFY THE CUSTOMER CONCERN


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

Yes
GO to AS2.

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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AS2 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 AS3.

No
REFER to Module Communications Network Testing and Inspection.

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AS3 RETRIEVE THE RECORDED DTCs FROM THE IPC AND PSCM SELF-TESTS


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

Yes
For the IPC, GO to Pinpoint Test AY (U3003:16) or GO to Pinpoint Test AZ (U3003:17). For the PSCM, REFER to Steering System - Electronic Power Assist Steering (EPAS) Special Tool(s) Used With Diagnostics. Pinpoint Test AY: DTC U3003:16 Pinpoint Test AZ: DTC U3003:17

No
GO to AS4.

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AS4 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 U0131:87 still present?

Yes
GO to AS5.

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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AS5 CHECK FOR DTC U0131:87 SET IN OTHER MODULES


- Clear the 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 steering gear. REFER to Power Steering Service and Repair. CLEAR the DTCs. REPEAT the IPC self-test.

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

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