Audio System Symptom Troubleshooting - Audio system information does not display on the multi-information display unit(Without Navigation, With Display Audio)

Audio system information does not display on the multi-information display unit

NOTE:

Check the vehicle 12 volt battery condition first .
Check the connectors for poor connections or loose terminals.

1. Determine possible failure area (audio system, others):
- 1. Turn the vehicle to the ON mode.

- 2. Check if any MID information appears on the multi-information display unit.

Is there any information displayed?

YES

Go to step 2.

NO

Refer to Audio System Symptom Troubleshooting - Multi-information display unit does not work .
2. Problem verification:
- 1. Turn on the audio system, and press the DISPLAY button to check if the multi-information display unit changes to the audio information screen.

Is the audio information displayed?

YES

Intermittent failure, the system is OK at this time.

NO: With XM

The failure is duplicated, go to step 3.

NO: Without XM

The failure is duplicated, go to step 4.
3. Determine possible failure area (related unit, others):
- 1. Turn the vehicle to the OFF (LOCK) mode.

- 2. Disconnect the following connector.

XM receiver connector A (14P)

- 3. Turn the vehicle to the ON mode.

- 4. Turn on the audio system, and press the DISPLAY button to check if the multi-information display unit changes to the audio information screen.

Is the audio information displayed?

YES

Replace the XM receiver .

NO

Go to step 4.

4. Determine possible failure area (GA SYS ON line, others):

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

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

Test condition	Vehicle OFF (LOCK) mode
	XM receiver connector A (14P): disconnected
Test point 1	Multi-information display unit connector A (32P) No. 32
Test point 2	Body ground

Is there battery voltage?

YES

The GA SYS ON wire is OK. Go to step 6.

Go to step 5.

5. Open wire check (GA SYS ON line):

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

Test condition	Vehicle OFF (LOCK) mode
	XM receiver connector A (14P): disconnected
Test point 1	Audio unit connector D (12P) No. 8 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Body ground

Is there battery voltage?

YES

Repair an open in the wire between the audio unit and the multi-information display unit.

Replace the audio unit - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio) .

6. Audio unit check:

- 1. Turn the vehicle to the ON mode.

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

Test condition	Vehicle ON mode
	XM receiver connector A (14P): disconnected
Test point 1	Multi-information display unit connector A (32P) No. 32
Test point 2	Body ground

Is there less than 0.2 V?

YES

Go to step 7.

Replace the audio unit - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .

7. 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 (32P)

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

Test condition	Vehicle OFF (LOCK) mode
	XM receiver connector A (14P): disconnected
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector D (12P) No. 7 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Body ground

Test point 1	Audio unit connector D (12P) No. 1 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Body ground

Is there continuity?

YES

There is a short to body ground in the wire(s) between the audio unit and the multi-information display unit. Replace the affected shielded harness.

The GA BUS+ and the GA BUS- wires are not shorted to ground. Go to step 8.

8. 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
	XM receiver connector A (14P): disconnected
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector D (12P) No. 7 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Audio unit connector D (12P) No. 1 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Is there continuity?

YES

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

The GA BUS+ and the GA BUS- wires are not shorted. Go to step 9.

9. 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
	XM receiver connector A (14P): disconnected
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector D (12P) No. 2 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Audio unit connector D (12P) No. 7 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Test point 1	Audio unit connector D (12P) No. 2 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Audio unit connector D (12P) No. 1 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Is there continuity?

YES

There is a short in the wires between the audio unit and the multi-information display unit. Replace the affected shielded harness.

The SH GA BUS wire is OK. Go to step 10.

10. 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
	XM receiver connector A (14P): disconnected
	Audio unit connector D (12P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector D (12P) No. 7 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Multi-information display unit connector A (32P) No. 27

Test point 1	Audio unit connector D (12P) No. 1 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Multi-information display unit connector A (32P) No. 11

Is there continuity?

YES

The GA BUS+ and the GA BUS- wires are OK. Go to step 11.

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

11. Multi-information display unit check (substitution):
- 1. Substitute a known-good multi-information display unit .

- 2. Reconnect all the connectors, and recheck.

Does the symptom go away?

YES

Replace the original multi-information display unit .

NO

Replace the audio unit - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .