Pinpoint Test AM: DTC U0193
Information and Entertainment System
Pinpoint Tests
Pinpoint Test AM: DTC U0193
Normal Operation
Certain audio system modules receive network messages from the Satellite Digital Audio Receiver System (SDARS) module 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 U0193 (Lost Communication With Digital Audio Control Module (SDARS)) - set by the non-navigation Audio Control Module (ACM) and the Rear Entertainment Module (RETM) when network messages are missing from the SDARS module 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
- SDARS module
PINPOINT TEST AM: DTC U0193
-------------------------------------------------
AM1 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 U0193 set in any audio system module?
Yes
GO to AM2.
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.
-------------------------------------------------
AM2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- ACM
- RETM (if equipped)
- SDARS module
- 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 AM3.
-------------------------------------------------
AM3 CHECK FOR DTC U0193 SET IN MULTIPLE MODULES
- Review the recorded results from the self-test.
- Is DTC U0193 set in more than one audio system module?
Yes
GO to AM4.
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.
-------------------------------------------------
AM4 CHECK FOR CORRECT SDARS MODULE OPERATION
- Ignition OFF.
- Disconnect the SDARS module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the SDARS module 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 SDARS module. REFER to Satellite Digital Audio Receiver System (SDARS) Module Satellite Digital Audio Receiver System (SDARS) Module.
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.
-------------------------------------------------