Pinpoint Tests AP: DTC U0131:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AP: DTC U0131:00

Normal Operation
- DTC U0131:00 (Lost Communication With Power Steering Control Module: No Sub Type Information) - sets in continuous memory if data messages received from the Power Steering Control Module (PSCM) module over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or more. 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 module
- IPC

PINPOINT TEST AP: DTC U0131:00

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AP1 VERIFY THE CUSTOMER CONCERN

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

Yes
GO to AP2.

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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AP2 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 AP3.

No
REFER to Module Communications Network Testing and Inspection.

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AP3 RETRIEVE THE RECORDED DTCs FROM THE PSCM SELF-TEST

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

Yes
REFER to Steering System Testing and Inspection.

No
GO to AP4.

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AP4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded DTCs from the IPC self-test.
- Is DTC U3006:16 or DTC U3006:17 recorded?

Yes
For DTC U3006:16, GO to Pinpoint Test AU. For DTC U3006:17, GO to Pinpoint Test AV. Pinpoint Tests AU: DTC U3006:16 Pinpoint Tests AV: DTC U3006:17

No
GO to AP5.

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AP5 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 AP6.

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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AP6 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 Service and Repair. CLEAR the DTCs. REPEAT the 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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