Pinpoint Test AB DTC U0184 or DTC U0184:00
Information and Entertainment System
Pinpoint Tests
Pinpoint Test AB DTC U0184 or DTC U0184:00
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
Audio system modules receive network messages from the Audio Control Module (ACM) 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 U0184 (Lost Communication With Radio) - set by the Satellite Digital Audio Receiver System (SDARS) module when network messages are missing from the ACM for greater than 5 seconds. This results in a loss of satellite radio functionality.
- DTC U0184:00 (Lost Communication With Radio: No Sub Type Information) - set by the Accessory Protocol Interface Module (APIM) and the Global Positioning System Module (GPSM) when network messages are missing from the ACM 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
- ACM
PINPOINT TEST AB: DTC U0184 OR DTC U0184:00
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AB1 CHECK THE APIM, GPSM or SDARS MODULE FOR DTCs
NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during Programmable Module Installation (PMI) or PMI may not have been carried out.
- Clear the APIM, GPSM or SDARS module DTCs.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Repeat the APIM, GPSM or SDARS module self-test.
- Is DTC U0184 or DTC U0184:00 still present?
Yes
GO to AB2.
No
The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
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AB2 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?
Yes
GO to AB3.
No
The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring. CHECK the MS-CAN wiring between the ACM and APIM or the ACM and the GPSM, or the ACM and the SDARS module for an intermittent fault.
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AB3 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Carry out the network test using the scan tool.
- Does the GPSM, APIM, or the SDARS module pass the network test?
Yes
GO to AB4.
No
REFER to Module Communications Network Testing and Inspection.
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AB4 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the following modules:
- APIM
- GPSM
- SDARS module
- Is DTC U3003:16 or DTC U3003:17 recorded in any module?
Yes
REFER to DTC Charts. Information and Entertainment Systems
No
INSTALL a new GPSM. REFER to Global Positioning System Module (GPSM) Service and Repair. CLEAR the APIM DTCs. REPEAT the APIM self-test.
If DTC U0184:00 is still present, INSTALL a new APIM. REFER to Accessory Protocol Interface Module (APIM) Accessory Protocol Interface Module (APIM). INSTALL a new SDARS module. REFER to Satellite Digital Audio Receiver System (SDARS) Module Service and Repair. CLEAR the SDARS module DTCs. REPEAT the SDARS module self-test. TEST the system for normal operation.
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