Pinpoint Test AB: DTC U0155:00

Information and Entertainment System

Pinpoint Tests

Pinpoint Test AB: DTC U0155:00

Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number

Normal Operation
- DTC U0155:00 (Lost Communication with Instrument Panel Cluster (IPC) Control Module: No Sub Type Information) - set by the audio Digital Signal Processing (DSP) module when network message are missing from the Instrument Cluster (IC) for greater than 5 seconds with the ignition in RUN. These messages include the ignition switch position, transmission selector (PRNDL) range, and vehicle speed.

This pinpoint test is intended to diagnose the following:

- Communication network concern
- Audio system concern
- IC



PINPOINT TEST AB: DTC U0155:00

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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AB1 CHECK FOR LOST COMMUNICATION DTCs


- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Retrieve all continuous DTCs from all modules.
- Is DTC U0155 or U0155:00 set in any audio system modules?

Yes
GO to AB2.

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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AB2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs


- Carry out the self-test for the following modules:
- Audio Control Module (ACM)
- IC
- audio DSP module
- Is DTC B1317, B1318, U3003:16, or U3003:17 recorded in any module?

Yes
For the ACM or audio DSP module, REFER to DTC Charts. [1][2]Diagnostic Trouble Code Descriptions

For the SJB, REFER to Body Control Systems.

No
GO to AB3.

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AB3 CHECK FOR DTC U0155 OR U0155:00 SET IN MULTIPLE MODULES


- Review the recorded results from the self-test.
- Is DTC U0155 or U0155:00 set in more than one module?

Yes
GO to AB4.

No
If there is an observable symptom, GO to Symptom Chart - General Audio System to diagnose the observed symptom. Symptom Related Diagnostic Procedures

If there is no observable symptom, DISREGARD the DTC.

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AB4 CHECK FOR CORRECT IC OPERATION


- Disconnect the IC connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IC connector and make sure it seats correctly.
- Is the concern still present?

Yes
INSTALL a new IC. REFER to Instrument Panel, Gauges and Warning Indicators. CLEAR all continuous DTCs. REPEAT the self-test.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all continuous DTCs. REPEAT the self-test.

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