• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Symptom Byte Information:Symptom Byte List

The A11 Radio interfaces with the P53 Driver Information Display/A22 Radio Control/A105 Instrument Panel Multifunction Human-Machine Interface Control Module using a LVDS cable. The A11 Radio monitors the LVDS signal for circuit faults and If a communication issue is detected, the K9 Body Control Module sets a DTC for the P53 Driver Information Display/A22 Radio Control/A105 Instrument Panel Multifunction Human-Machine Interface Control Module as needed.

Ignition=On

The A11 Radio detects a malfunction of the LVDS signal.

A message and/or warning indicator may be displayed to the driver or display may be blank.

The conditions for setting the DTC no longer exist.

LVDS cables must be fully connected to function properly. Ensure LVDS cables are properly connected at all components.

Radio/Navigation System Schematics

Master Electrical Component List

Radio/Audio System Description and Operation

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Control Module References for scan tool information

1. Ignition ON.
2. Verify DTC U0184, U0884, U11FD, U164E, B1C4A, B1C4D, B1C9F, B1D71, or B1D74 is not set.
• If DTC U0184, U0884, U11FD, U164E, B1C4A, B1C4D, B1C9F, B1D71, or B1D74 is set

  Refer to Diagnostic Trouble Code (DTC) List - Vehicle

• If DTC U0184, U0884, U11FD, U164E, B1C4A, B1C4D, B1C9F, B1D71, or B1D74 is not set
3. Ignition ON/vehicle in service mode, verify the A11 Radio has the latest software available
• If the A11 Radio does not have the latest software available
4. Program the A11 Radio.
5. Verify the DTC is not set.
• If DTC is not set

  All OK.

• If DTC is set
6. Ignition/Vehicle OFF, verify the LVDS cable is properly connected at the A11 Radio, and the P53 Driver Information Display/A22 Radio Control/A105 Instrument Panel Multifunction Human-Machine Interface Control Module, and any in-line connections, and there is no damage to the cable or connections.
• If connection problems or cable damage is noted, perform the appropriate repair or replacement to correct any issues.
• If no connection problems or cable damage is noted

  Replace the LVDS cable

7. Verify the DTC is not set.
• If DTC is not set

  All OK.

• If DTC is set
8. Replace the A11 Radio.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for control module replacement, programming and setup