DTC 2612: Upper Display Diag (With Display Audio) (2017)

NOTE: 

• First, check the Vehicle 12 volt battery condition .
• This navigation DTC sets when Connection NG is indicated in the Upper Display diagnosis (the Upper Display icon is red in the System Links).
• Before you troubleshoot, make sure to follow the General Troubleshooting Information - Refer to: How to Troubleshoot the Navigation System (With Display Audio) (2017) .

1. Problem verification

   -1. Clear the hard error codes.

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

   - 3. Check for hard error codes.

   Is DTC 2612 indicated?

   YES 

   The failure is duplicated, go to step 2.

   NO: DTC is not indicated

   Intermittent failure, the system is OK at this time.

2. Open wire check (+B AUDIO line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   Test point 1	Multi-information display unit connector A (12P) No. 6 - Refer to: Multi-Information Display Unit Connector for Inputs and Outputs (With Navigation and Display Audio) (2017)

   Test point 2

   Body ground

   Is there battery voltage?

   YES 

   The +B AUDIO wire is OK. Go to step 3.

   NO 

   Repair an open in the wire between the No. A22 (15 A) fuse in the under-hood fuse/relay box and the multi-information display unit.

3. Open wire check (ACC line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   Test point 1	Multi-information display unit connector A (12P) No. 5 - Refer to: Multi-Information Display Unit Connector for Inputs and Outputs (With Navigation and Display Audio) (2017)
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   The ACC wire is OK. Go to step 4.

   NO 

   Repair an open in the wire between the No. B37 (7.5A) fuse in the under-dash fuse/relay box and the multi-information display unit.

4. Open wire check (GND line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   Test point 1	Multi-information display unit connector A (12P) No. 12 - Refer to: Multi-Information Display Unit Connector for Inputs and Outputs (With Navigation and Display Audio) (2017)
   Test point 2	Body ground

   Is there less than 0.2 V?

   YES 

   The GND wire is OK. Go to step 5.

   NO 

   Repair an open or high resistance in the wire between the multi-information display unit and body ground (G505).

5. Open wire check (GA BUS+ line, GA BUS- line)

   -1. Disconnect the following connectors.

   Multi-information display unit connector A (12P)

   Audio-navigation unit connector D (12P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Multi-information display unit connector A (12P): disconnected
   	Audio-navigation unit connector D (12P): disconnected
   Test point 1	Multi-information display unit connector A (12P) No. 1 - Refer to: Multi-Information Display Unit Connector for Inputs and Outputs (With Navigation and Display Audio) (2017)
   Test point 2	Audio-navigation unit connector D (12P) No. 7 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (With Display Audio) (2017)

   Test point 1	Multi-information display unit connector A (12P) No. 2 - Refer to: Multi-Information Display Unit Connector for Inputs and Outputs (With Navigation and Display Audio) (2017)
   Test point 2	Audio-navigation unit connector D (12P) No. 1 - Refer to: Audio-Navigation Unit Connector for Inputs and Outputs (With Display Audio) (2017)

   Is there continuity?

   YES 

   Replace the multi-information display unit .

   NO 

   There is an open in the wire (s) between the multi-information display unit and the audio-navigation unit. Replace the affected shielded harness.