Pinpoint Test AR: DTC U0197 Or DTC U0197:00
Information and Entertainment System
Pinpoint Test AR: 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). These messages consist of various audio system-related information.
As more than one module receives 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 Front Display Interface Module (FDIM) when network messages are missing from the APIM (Accessory Protocol Interface Module) for greater than 5 seconds with the ignition in RUN.
- DTC U0197:00 (Lost Communication Wit Telephone Control Module: No Sub Type Information)- Set by the Audio Control Module (ACM) or the audio Digital Signal Processing (DSP) module when status messages from the APIM (Accessory Protocol Interface Module) are missing greater than 5 seconds with the ignition in RUN. When these message are missing, the SYNC system is inoperative.
This pinpoint test is intended to diagnose the following:
- Communication network concern
- Audio system concern
- APIM (Accessory Protocol Interface Module)
PINPOINT TEST AR : DTC U0197 OR DTC U0197:00
AR1 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 AR2.
No
The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
AR2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- ACM (Audio Control Module)
- Audio DSP (Digital Signal Processing) module (if equipped)
- APIM (Accessory Protocol Interface Module) (if equipped)
- FDIM (Front Display Interface Module)
- GPSM (Global Positioning System Module)
Is DTC B1317, B1318, U3003:16 or U3003:17 recorded in any module?
Yes
REFER to DTC Charts. Accessories and Optional Equipment
No
GO to AR3.
AR3 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 AR4.
No
If there is an observable symptom, REFER to the appropriate Symptom Chart.
If there is no observable symptom, CHECK the MS-CAN (Medium Speed Controller Area Network) wiring between the APIM (Accessory Protocol Interface Module) and the module in question for an intermittent fault.
AR4 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION
- Disconnect all the APIM (Accessory Protocol Interface Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the APIM (Accessory Protocol Interface Module) connectors and make sure they seat correctly.
- Wait 2 minutes for the APIM (Accessory Protocol Interface Module) to re-initialize.
Is the concern still present?
Yes
INSTALL a new APIM (Accessory Protocol Interface Module). REFER to Accessory Protocol Interface Module (APIM) . 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. CLEAR all continuous DTCs. REPEAT the self-test for the module(s) that set DTC U0197 or DTC U0197:00.