Pinpoint Test AN: DTC U0196 Or DTC U0196:00

Information and Entertainment System

Pinpoint Tests

Pinpoint Test AN: DTC U0196 Or DTC U0196:00

Normal Operation

Several audio system modules receive network messages from the Rear Entertainment Module (RETM) via the Medium Speed Controller Area Network (MS-CAN).

As more than one module receives each of these messages, all modules receiving a particular message should exhibit a symptom if the message is missing.

- DTC U0196 (Lost Communication With Entertainment Control Module - Rear (AUX)) - set by the non-navigation Audio Control Module (ACM) and the Satellite Digital Audio Receiver System (SDARS) module when network messages are missing from the RETM for greater than 5 seconds with the ignition in RUN.
- DTC U0196:00 (Lost Communication With Entertainment Control Module-Rear "A": No Sub Type Information) - set by the navigation ACM and the Accessory Protocol Interface Module (APIM) when network messages are missing from the RETM for greater than 5 seconds with the ignition in RUN.

This pinpoint test is intended to diagnose the following:

- Communication network concern
- Audio system concern
- RETM



PINPOINT TEST AN: DTC U0196 OR DTC U0196:00

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AN1 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 U0196 or DTC U0196:00 set in any audio system module?

Yes
GO to AN2.

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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AN2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs


- Carry out the self-test for the following modules:
- ACM
- RETM
- SDARS module (if equipped)
- APIM (if equipped)
- Is DTC B1317, B1318, U3003:16, or U3003:17 recorded in any module?

Yes
GO to the DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures

No
GO to AN3.

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AN3 CHECK FOR DTC U0196 OR DTC U0196:00 SET IN MULTIPLE MODULES


- Review the recorded results from the self-test.
- Is DTC U0196 or DTC U0196:00 set in more than one audio system module?

Yes
GO to AN4.

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

If there is no observable symptom, DISREGARD the DTC.

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AN4 CHECK FOR CORRECT RETM OPERATION


- Ignition OFF.
- Disconnect the RETM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the RETM connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?

Yes
INSTALL a new RETM. REFER to Rear Entertainment Module (RETM) Service and Repair. 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.

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