Electrical Compass Troubleshooting
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.
1.
Problem verification 1:

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.
2.
Problem verification 2:

Problem verification 2
?1.
Check if the audio display is flashing the CAL and NW.

Is the CAL and NW flashing?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Problem verification 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.
4.
Determine possible failure area (electrical compass unit, others):

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
     
     
     
     
NO
     
     
     
Go to step 5.
5.
Open wire check (B-CAN_H line, B-CAN_L line):

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


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the wire(s).?
6.
Open wire check (IG1 METER line):

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.
     
NO
     
     
     
Repair an open or high resistance in the wire.?
7.
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
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.
     
NO
     
     
     
Repair an open or high resistance in the ground wire or poor ground (G401).?
8.
Shorted wire check (COMPASS lines):

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).?
     
NO
     
     
     
The COMPASS wires are not shorted to ground. Go to step 9.
9.
Open wire check (COMPASS lines):

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.
     
NO
     
     
     
Repair an open in the wire(s).?
10.
Electrical compass unit check (substitution):

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
     
     
     
     
NO