U0184

Information and Entertainment System

Pinpoint Test X: DTC U0184:00

Normal Operation

Several audio system modules receive network messages from the Audio Control Module (ACM) via the Infotainment Controller Area Network (I-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 U0184:00 (Lost Communication With Radio: No Sub Type Information)- set by the Accessory Protocol Interface Module (APIM), the Front Control/Display Interface Module (FCDIM) and the audio Digital Signal Processing (DSP) module when network messages are missing from the ACM (Audio Control Module) for more than 5 seconds with the ignition in RUN.

This pinpoint test is intended to diagnose the following:

- Communication network concern

- Audio system concern

- ACM (Audio Control Module)

PINPOINT TEST X : DTC U0184:00

X1 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 U0184:00 set in any audio system module?

Yes
GO to X2.

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.

X2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs

- Carry out the self-test for the following modules:
- ACM (Audio Control Module)

- APIM (Accessory Protocol Interface Module) (if equipped)

- Audio DSP (Digital Signal Processing) module (if equipped)

- FCDIM (Front Control/Display Interface Module) (if equipped)


Is DTC U3003:16 or U3003:17 recorded in any module?

Yes
REFER to DTC Charts Accessories and Optional Equipment.

No
GO to X3.

X3 CHECK FOR DTC U0184:00 SET IN MULTIPLE MODULES

- Review the recorded results from the self-test.

Is DTC U0184:00 set in more than one audio system module?

Yes
GO to X4.

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 I-CAN (Infotainment Controller Area Network) wiring between the ACM (Audio Control Module) and the module in question for an intermittent fault.

X4 CHECK FOR CORRECT ACM (Audio Control Module) OPERATION

- Ignition OFF.

- Disconnect all the ACM (Audio Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the ACM (Audio Control Module) connectors and make sure they seat correctly.

- Operate the system and determine if the concern is still present.

Is the concern still present?

Yes
INSTALL a new ACM (Audio Control Module). REFER to Audio Control Module (ACM) . 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.