Pinpoint Test Z: DTC U0155 Or DTC U0155:00

Information and Entertainment System

Pinpoint Tests

Pinpoint Test Z: DTC U0155 Or DTC U0155:00

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

Normal Operation

The Global Positioning System Module (GPSM) receives network messages from the Instrument Panel Cluster (IPC) via the Medium Speed Controller Area Network (MS-CAN).

- DTC U0155 (Lost Communication With Instrument Panel Cluster ( IC) Module) - set by the non-navigation Audio Control Module (ACM) when messages are missing from the IPC for greater than 5 seconds.
- DTC U0155:00 (Lost Communication With Instrument Panel Cluster ( IPC) Control Module) - set by the ACM, GPSM and Accessory Protocol Interface Module (APIM) when network messages are missing from the IPC for greater then 5 seconds.

This pinpoint test is intended to diagnose the following:

- Communication network concern
- Audio system concern
- IPC


PINPOINT TEST Z: DTC U0155 Or DTC U0155:00

-------------------------------------------------
Z1 CHECK FOR LOST COMMUNICATION DTCs


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

Yes
GO to Z2.

No
The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.

-------------------------------------------------
Z2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs


- Carry out the self-test for the following modules.
- ACM
- APIM
- Front Display Interface Module (FDIM)
- GPSM
- IPC
- Are any low or high voltage DTCs recorded in any module?

Yes
For an audio system module, REFER to DTC Charts. Information and Entertainment Systems

For the IPC, REFER to Instrumentation, Message Center, and Warning Chimes Instrumentation, Message Center and Warning Chimes.

No
GO to Z3.

-------------------------------------------------
Z3 CHECK FOR DTC U0155 OR DTC U0155:00 SET IN MULTIPLE MODULES


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

Yes
GO to Z4.

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

If there is no observable symptom, CHECK the MS-CAN wiring between the SJB and the module in question for an intermittent fault.

-------------------------------------------------
Z4 CHECK FOR CORRECT IPC OPERATION


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

Yes
INSTALL a new IPC. REFER to Instrumentation, Message Center, and Warning Chimes Instrument Panel Cluster (IPC). CLEAR all continuous DTCs. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

-------------------------------------------------