Audio-navigation unit power will not turn on (No information display on touch screen) (With Auto Idle Stop System)

NOTE: 

• Check the vehicle 12 volt battery condition first - Refer to:

  12 Volt Battery Test (With Auto Idle Stop System) or

  12 Volt Battery Test (Without Auto Idle Stop System) .

• Check for PGM-FI 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. Press the POWER button on to see if the audio-navigation unit turns on.

   Does the audio system operate properly, and does the audio sound normal?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   The failure is duplicated, go to step 2.

2. Fuse check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Check the following fuses.

   Fuse	No. C40 (7.5 A)
   Location	Under-dash fuse/relay box

   Fuse	No. D5 (20 A)
   	No. D7 (7.5 A)
   Location	Auxiliary under-dash fuse/relay box

   Are the fuses OK?

   YES 

   Go to step 3.

   NO 

   Replace the fuse(s), and recheck. If the fuse(s) blows again, check for a short in the No. C40 (7.5 A) fuse, the No. D5 (20 A) fuse, and/or the No. D7 (7.5 A) fuse circuits.

3. Open wire check (+B AUDIO (DC/DC) line)

   -1. Disconnect the following connector.

   Audio-navigation unit connector A (24P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector A (24P): disconnected
   Test point 1	Audio-navigation unit connector A (24P) No. 3 - Go to: Audio-Navigation Unit Connector For Inputs And Outputs (2016)
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   The +B AUDIO (DC/DC) wire is OK. Go to step 4.

   NO 

   Repair an open in the wire between the No. D5 (20 A) fuse in the auxiliary under-dash fuse/relay box and the audio-navigation unit.

4. Determine possible failure area (ACC (DC/DC) line, others)

   -1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Audio-navigation unit connector A (24P): disconnected
   Test point 1	Audio-navigation unit connector A (24P) No. 24 - Go to: Audio-Navigation Unit Connector For Inputs And Outputs (2016)
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 8.

   NO 

   Go to step 5.

5. DC-DC converter ACC relay check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Remove the DC-DC converter ACC relay from the auxiliary under-dash fuse/relay box, and test it. Power Relay Test

   Is the relay OK?

   YES 

   Go to step 6.

   NO 

   Replace the DC-DC converter ACC relay.

6. Open wire check (ACC RLY (DC/DC)/ACC (DC/DC) line)

   -1. Connect terminals A and B with a jumper wire.

   Terminal A	DC-DC converter ACC relay 4P socket No. 1
   Terminal B	DC-DC converter ACC relay 4P socket No. 2

   Courtesy of HONDA, U.S.A., INC.

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

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector A (24P): disconnected
   	DC-DC converter ACC relay: disconnected
   	DC-DC converter ACC relay 4P socket No. 1 and No. 2: jumped
   Test point 1	Audio-navigation unit connector A (24P) No. 24 - Go to: Audio-Navigation Unit Connector For Inputs And Outputs (2016)
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   The ACC RLY (DC/DC)/ACC (DC/DC) wires are OK. Go to step 7.

   NO 

   Repair an open in the wire between the No. D7 (7.5 A) fuse in the auxiliary under-dash fuse/relay box and the audio-navigation unit.

7. Open wire check (ACC line)

   -1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	DC-DC converter ACC relay: disconnected
   Test point 1	DC-DC converter ACC relay 4P socket No. 3
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   Repair an open or high resistance in the wire between the DC-DC converter ACC relay in the auxiliary under-dash fuse/relay box and body ground (G301).

   NO 

   Repair an open in the wire between the No. C40 (7.5 A) fuse in the under-dash fuse/relay box and the DC-DC converter ACC relay in the auxiliary under-dash fuse/relay box.

8. Open wire check (GND line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

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

   Test condition	Vehicle OFF (LOCK) mode
   	Audio-navigation unit connector A (24P): disconnected
   Test point 1	Audio-navigation unit connector A (24P) No. 1 - Go to: Audio-Navigation Unit Connector For Inputs And Outputs (2016)
   Test point 2	Body ground

   Is there continuity?

   YES 

   Replace The Audio-Navigation Unit .

   NO 

   Repair an open or high resistance in the wire between the audio-navigation unit and body ground (G404).