Pinpoint Test AQ: DTC U0197 Or DTC U0197:00
Information and Entertainment System
Pinpoint Tests
Pinpoint Test AQ: DTC U0197 Or DTC U0197:00
Normal Operation
Several audio system modules receive network messages from the Accessory Protocol Interface Module (APIM) 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 U0197 (Lost Communication With Telephone Control Module) - 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 APIM for greater than 5 seconds with the ignition in RUN.
- DTC U0197:00 (Lost Communication With Telephone Control Module: No Sub Type Information) - set by the navigation ACM and the Global Positioning System Module (GPSM) when network messages are missing from the APIM 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
- APIM
PINPOINT TEST AQ: DTC U0197 OR DTC U0197:00
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AQ1 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 U0197 or DTC U0197:00 set in any audio system module?
Yes
GO to AQ2.
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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AQ2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- ACM
- SDARS module (if equipped)
- APIM
- GPSM (if equipped)
- Is DTC B1318, U3003:16 or U3003:17 recorded in any module?
Yes
GO to DTC Charts. Information and Entertainment System
No
GO to AQ3.
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AQ3 CHECK FOR DTC U0197 OR DTC U0197:00 SET IN MULTIPLE MODULES
- Review the recorded results from the self-test.
- Is DTC U0197 or DTC U0197:00 set in more than one audio system module?
Yes
GO to AQ4.
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, CHECK the MS-CAN wiring between the APIM and the module in question for an intermittent fault.
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AQ4 CHECK FOR CORRECT APIM OPERATION
- Disconnect the APIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM connector and make sure it seats correctly.
- Wait 2 minutes for the APIM to re-initialize.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new APIM. REFER to Accessory Protocol Interface Module (APIM) Accessory Protocol Interface Module (APIM). 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. CLEAR all continuous DTCs.
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