Pinpoint Tests AN: DTC U0151

Instrumentation and Warning Chimes

Pinpoint Tests

Pinpoint Test AN: DTC U0151

- DTC U0151 (Lost Communication With Restraints Control Module [ RCM]) - sets in continuous memory if data messages received from the Restraints Control Module (RCM) over the Medium Speed Controller Area Network (MS-CAN) are missing for greater than 5 seconds.

This pinpoint test is intended to diagnose the following:

- RCM
- Instrument Cluster (IC)



PINPOINT TEST AN: DTC U0151

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AN1 VERIFY THE CUSTOMER CONCERN


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

Yes
GO to AN2.

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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AN2 CHECK THE COMMUNICATION NETWORK


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

Yes
GO to AN3.

No
REFER to Information Bus.

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AN3 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded IC DTCs from the self-test.
- Is DTC B1317 or DTC B1318 recorded?

Yes
GO to Pinpoint Test AG (B1317) or GO to Pinpoint Test AH (B1318). Pinpoint Tests AG: DTC B1317 Pinpoint Tests AH: DTC B1318

No
GO to AN4.

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AN4 RECHECK THE IC DTCs


- Clear the DTCs. Repeat the IC self-test.
- Is DTC U0151 still present?

Yes
INSTALL a new RCM. REFER to Restraint Systems. CLEAR the DTCs. REPEAT the IC self-test.

If DTC U0151 is still present, INSTALL a new IC. REFER to Instrument Cluster (IC) Service and Repair. TEST the system for normal operation.

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

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