Electrical Compass Troubleshooting

NOTE:

Check the vehicle 12 volt battery condition first .
Check for B-CAN DTCs and resolve them before troubleshooting.
Check the connectors for poor connections or loose terminals.

Problem verification 1
-1. Turn the vehicle to the ON mode.

-2. Check if the azimuth (direction) information is displayed in the audio display.

Is the azimuth (direction) information displayed?

YES

Go to step 2.

NO

Go to step 6.
Problem verification 2
-1. Check if the audio display is flashing the CAL and NW.

Is the CAL and NW flashing?

YES

Replace the electrical compass unit .

NO

Go to step 3.
Problem verification 3
-1. Do the Electrical Compass Calibration .

Is the calibration completed?

YES

Intermittent failure, the system is OK at this time.

NO

Go to step 4.
Determine possible failure area (electrical compass unit, others)
-1. Go into the System Diagnostic Mode, and select the Vehicle Status in the System Links to check the vehicle speed pulse .

-2. With the help of an assistant, test-drive the vehicle and watch the VSP signal.

Is the vehicle speed indicated?

YES

Replace the electrical compass unit .

NO

Go to step 5.

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

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

-2. Disconnect the following connectors.

Audio unit connector A (24P)

Gauge control module connector A (32P)

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

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector A (24P): disconnected

	Gauge control module connector A (32P): disconnected
Test point 1	Audio unit connector A (24P) No. 14
Test point 2	Gauge control module connector A (32P) No. 30

Test point 1	Audio unit connector A (24P) No. 24
Test point 2	Gauge control module connector A (32P) No. 31

Is there continuity?

YES

Replace the audio unit .

Repair an open in the wire(s).

Open wire check (IG1 METER line)

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

Test condition	Vehicle ON mode
Test point 1	Electrical compass unit 6P connector No. 6
Test point 2	Body ground

Is there battery voltage?

YES

The IG1 METER wire is OK. Go to step 7.

Repair an open or high resistance in the wire.

Open wire check (GND line)

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

Test condition	Vehicle ON mode
Test point 1	Electrical compass unit 6P connector No. 5
Test point 2	Body ground

Is there less than 0.2 V?

YES

The GND wire is OK. Go to step 8.

Repair an open or high resistance in the ground wire or poor ground (G401).

Shorted wire check (COMPASS lines)

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

-2. Disconnect the following connectors.

Audio unit connector C (32P)

Electrical compass unit 6P connector

-3. Check for continuity between these test points and body ground individually.

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector C (32P): disconnected
	Electrical compass unit 6P connector: disconnected

Connector	Terminal
Electrical compass unit 6P connector	No. 1
	No. 2
	No. 3
	No. 4

Is there continuity?

YES

Repair a short to body ground in the wire(s).

The COMPASS wires are not shorted to ground. Go to step 9.

Open wire check (COMPASS lines)

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

Test condition	Vehicle OFF (LOCK) mode
	Audio unit connector C (32P): disconnected
	Electrical compass unit 6P connector: disconnected

Test point 1:Audio unit connector C (32P)	Test point 2:Electrical compass unit 6P connector
No. 12	No. 1
No. 11	No. 2
No. 4	No. 3
No. 3	No. 4

Is there continuity?

YES

The COMPASS wires are OK. Go to step 10.

Repair an open in the wire(s).

Electrical compass unit check (substitution)
-1. Substitute a known-good electrical compass unit .

-2. Reconnect all the connectors, and recheck.

Does the symptom go away?

YES

Replace the original electrical compass unit .

NO

Replace the audio unit .