Pinpoint Test L: DTC U0155

Tire Pressure Monitoring System

Pinpoint Tests

Pinpoint Test L: DTC U0155

Refer to Wiring Diagram Set 118, Tire Pressure Monitoring System (TPMS) for schematic and connector information. Diagrams By Number

Normal Operation
- DTC U0155 (Lost Communication With Instrument Panel Cluster (IC) Control Module) - sets in the Tire Pressure Monitor (TPM)/Vehicle Security Module (VSM) if the vehicle speed or stoplamp switch messages that should be received from the Instrument Cluster (IC) are missing for 10 seconds or longer. If a communications failure is detected by the TPM/ VSM, the DTC U0155 is present in the module.

This pinpoint test is intended to diagnose the following:
- Network communication concern
- IC
- TPM/VSM


PINPOINT TEST L: DTC U0155

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L1 VERIFY THE CUSTOMER CONCERN


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

Yes
GO to L2.

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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L2 CHECK THE COMMUNICATION NETWORK


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

Yes
GO to L3.

No
REFER to Module Communications Network Testing and Inspection.

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L3 RETRIEVE THE RECORDED DTCs FROM THE TPM/VSM AND IC SELF-TESTS


- Check for recorded TPM/ VSM and Instrument Cluster (IC) DTCs from the self-test.
- Is DTC B1318 or DTC B1317 recorded?

Yes
For the TPM/VSM, GO to Pinpoint Test E. Pinpoint Test E: DTC B1317

For the IC, REFER to Instrumentation and Warning Chimes Testing and Inspection.

No
GO to L4.

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L4 CHECK FOR DTC U0155 SET IN OTHER MODULES


- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: VSM Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0155 set in more than one module?

Yes
INSTALL a new IC. REFER to Instrumentation and Warning Chimes Service and Repair. TEST the system for normal operation. REPEAT the TPM/VSM self-test.

No
INSTALL a new TPM/VSM. REFER to Tire Pressure Monitoring System (TPMS) Module Service and Repair. TEST the system for normal operation.

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