ODMD (TM) Does Not Dim Or Brighten With Dimmer (Without Navigation)

NOTE: 

• Check the vehicle 12 volt battery condition first - Refer to: 12 Volt Battery Test (Without SH-AWD), or 12 Volt Battery Test (With SH-AWD) .
• Check for B-CAN DTCs and resolve them before troubleshooting.
• Check the connectors for poor connections or loose terminals.

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Make sure the Sync Display Brightness in the System Settings is ON.

   - 3. Turn the combination light switch to the parking light position.

   - 4. Press the brightness control button several times.

   Does the ODMD (TM) brightness change?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   The failure is duplicated, go to step 2.

2. Determine possible failure area (dashlights brightness circuit, others)

   - 1. Check if several other buttons that are not related to the audio system are illuminated.

   Are the buttons illuminated?

   YES 

   Go to step 3.

   NO 

   Troubleshoot the dashlights brightness circuit.

3. Determine possible failure area (audio unit, others)

   - 1. Press the brightness control button several times.

   Does the center display brightness change?

   YES 

   Replace the audio unit .

   NO 

   Go to step 4.

4. Open wire check (B-CAN_H line, B-CAN_L line)

   - 1. Turn the combination light switch off.

   - 2. Turn the vehicle to the OFF (LOCK) mode.

   - 3. Disconnect the following connectors.

   NOTE:  Eject the disc before disconnecting the audio unit to prevent damaging the CD player's load mechanism.

   Audio unit connector A (24P)

   Gauge control module 32P connector

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Audio unit connector A (24P): disconnected
   	Gauge control module 32P connector: disconnected
   Test point 1	Audio unit connector A (24P) No. 4 - Refer to: Audio Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17), or Audio Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17), or Audio Unit Connector for Inputs and Outputs (2018), or Audio Unit Connector for Inputs and Outputs (2019)
   Test point 2	Gauge control module 32P connector No. 25 - Refer to: Gauge Control Module Input Test (2015-17), or Gauge Control Module Input Test (2018-19)

   Test point 1	Audio unit connector A (24P) No. 2 - Refer to: Audio Unit Connector for Inputs and Outputs (With Auto Idle Stop System) (2015-17), or Audio Unit Connector for Inputs and Outputs (Without Auto Idle Stop System) (2015-17), or Audio Unit Connector for Inputs and Outputs (2018), or Audio Unit Connector for Inputs and Outputs (2019)
   Test point 2	Gauge control module 32P connector No. 26 - Refer to: Gauge Control Module Input Test (2015-17), or Gauge Control Module Input Test (2018-19)

   Is there continuity?

   YES 

   Replace the audio unit .

   NO 

   Repair an open in the wire (s) between the audio unit and the gauge control module.