Audio System DTC Troubleshooting: 2612 (Display Audio)

Audio System DTC Troubleshooting: 2612

DTC 2612: Upper Display Disg

NOTE:

	Check the vehicle battery condition first.
	This audio DTC sets when Connection NG is indicated in the electrical compass unit diagnosis (the compass unit icon is red in the System Links).
	Before you troubleshoot, make sure to follow the General Troubleshooting Information.
	Check the connectors for poor connections or loose terminals.

Problem verification:

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 1406 indicated with DTC 2612?


	YES

The failure is duplicated, go to step 2.


	NO: Only DTC 2612 is indicated

The failure is duplicated, go to step 7.


	NO: DTC is not indicated

Intermittent failure, the system is OK at this time.?

Determine possible failure area (related unit, others):

Determine possible failure area (related unit, others)

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

?2.

Disconnect the following connector.

Tuner unit connector A (12P)

?3.	Clear the hard error codes.

?4.	Turn the vehicle to the ON mode.

?5.	Check for hard error codes.

Is DTC 2612 indicated?


	YES

Go to step 3.


	NO

Replace the tuner unit.?

Shorted wire check (GA BUS+ line, GA BUS? line):

Shorted wire check (GA BUS+ line, GA BUS? line)

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

?2.

Disconnect the following connectors.

Audio unit connector D (12P)

Multi-information display unit connector A (12P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Tuner unit connector A (12P): disconnected

Test point 1	Multi-information display unit connector A (12P) No. 1
Test point 2	Body ground

Test point 1	Multi-information display unit connector A (12P) No. 2
Test point 2	Body ground

Is there continuity?


	YES

There is a short to body ground in the GA BUS wire(s). Replace the affected shielded harness.?


	NO

The GA BUS+ and the GA BUS? wires are not shorted to ground. Go to step 4.

Shorted wire check (GA BUS+ line to GA BUS? line):

Shorted wire check (GA BUS+ line to GA BUS? line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Tuner unit connector A (12P): disconnected

Test point 1	Multi-information display unit connector A (12P) No. 1
Test point 2	Multi-information display unit connector A (12P) No. 2

Is there continuity?


	YES

There is a short in the GA BUS wires. Replace the affected shielded harness.?


	NO

The GA BUS+ and the GA BUS? wires are not shorted. Go to step 5.

Shorted wire check (SH GA BUS line to another lines):

Shorted wire check (SH GA BUS line to another lines)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Tuner unit connector A (12P): disconnected

Test point 1	Multi-information display unit connector A (12P) No. 7
Test point 2	Multi-information display unit connector A (12P) No. 1

Test point 1	Multi-information display unit connector A (12P) No. 7
Test point 2	Multi-information display unit connector A (12P) No. 2

Is there continuity?


	YES

There is a short in the GA BUS wires. Replace the affected shielded harness.?


	NO

The SH GA BUS wire is OK. Go to step 6.

Open wire check (GA BUS+ line, GA BUS? line):

Open wire check (GA BUS+ line, GA BUS? line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (12P): disconnected
	Tuner unit connector A (12P): disconnected

Test point 1	Multi-information display unit connector A (12P) No. 1
Test point 2	Audio unit connector D (12P) No. 7

Test point 1	Multi-information display unit connector A (12P) No. 2
Test point 2	Audio unit connector D (12P) No. 1

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 unit. Replace the affected shielded harness.?

Open wire check (+B AUDIO line):

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
Test point 2	Body ground

Is there battery voltage?


	YES

The +B AUDIO wire is OK. Go to step 8.


	NO

Repair an open in the wire between the No. A22 (10 A) fuse in the under-hood fuse/relay box and the multi-information display unit.?

Open wire check (ACC line):

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
Test point 2	Body ground

Is there battery voltage?


	YES

The ACC wire is OK. Go to step 9.


	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.?

Open wire check (GND line):

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
Test point 2	Body ground

Is there less than 0.2 V?


	YES

The GND wire is OK. Go to step 10.


	NO

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

10.

Open wire check (GA BUS+ line, GA BUS? line):

Open wire check (GA BUS+ line, GA BUS? line)

?1.

Disconnect the following connectors.

Multi-information display unit connector A (12P)

Audio 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 unit connector D (12P): disconnected

Test point 1	Multi-information display unit connector A (12P) No. 1
Test point 2	Audio unit connector D (12P) No. 7

Test point 1	Multi-information display unit connector A (12P) No. 2
Test point 2	Audio unit connector D (12P) No. 1

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 unit. Replace the affected shielded harness.?