Pinpoint Test J: DTC U0131:00

Anti-Lock Control

Pinpoint Tests

Pinpoint Test J: DTC U0131:00

Normal Operation
- DTC U0131:00 (Lost Communication With Power Steering Control Module: No Sub Type Information) - sets in continuous memory and on-demand if the steering sensor message that should be received from the Power Steering Control Module (PSCM) is missing for 5 seconds or longer.

This pinpoint test is intended to diagnose the following:

- PSCM
- ABS module

PINPOINT TEST J: DTC U0131:00

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J1 VERIFY THE CUSTOMER CONCERN


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

Yes
GO to J2.

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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J2 CHECK THE COMMUNICATION NETWORK


- 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 J3.

No
REFER to Module Communications Network Testing and Inspection.

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J3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE AND PSCM SELF-TESTS


- Check for recorded ABS module and PSCM DTCs from the self-test.
- Is DTC U3003:16 (or B11E8:16) or DTC U3003:17 (or B11E8:17) recorded?

Yes
For DTC B11E8:16, GO to Pinpoint Test A. Pinpoint Test A: DTC B11E8:16

For DTC B11E8:17, GO to Pinpoint Test B. Pinpoint Test B: DTC B11E8:17

For the PSCM, REFER to Steering System - Electronic Power Assist Steering (EPAS) Special Tool(s) Used With Diagnostics.

No
GO to J4.

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J4 RECHECK THE ABS MODULE DTCs


- Clear the DTCs.
- Wait 10 seconds.
- Repeat the ABS module self-test.
- Is DTC U0131:00 still present?

Yes
GO to J5.

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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J5 CHECK FOR DTC U131:87 SET IN THE IPC


- 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 Diagnostic Trouble Codes (CMDTCs) from all modules.
- Is DTC U0131:87 set in the IPC?

Yes
INSTALL a new PSCM.

No
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module Service and Repair. TEST the system for normal operation.

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