Pinpoint Test L: DTC U0155

Tire Pressure Monitoring System

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) - this DTC 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 Panel Cluster (IPC) 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
- IPC
- 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: IPC Network Test.
- Carry out the network test.
- Does the IPC 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 IPC SELF-TESTS

- Check for recorded TPM/ VSM and IPC DTCs from the self-test.
- Is DTC U3003:16 (or B1318) or DTC U3003:17 (or B1317) recorded?

Yes
For the TPM/VSM, REFER to DTC Chart. [1][2]Diagnostic Trouble Code Descriptions

For the IPC, REFER to Instrumentation, Message Center, 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 U0155:00 or DTC U0155 set in more than one module?

Yes
INSTALL a new IPC. REFER to Instrumentation, Message Center, and Warning Chimes Service and Repair. TEST the system for normal operation. REPEAT the ABS module self-test.

No
INSTALL a new TPM/VSM. REFER to Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan or Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback. TEST the system for normal operation.

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