Inspection Procedure 2

Compass is not Displayed.

Compass Circuit Part 1:

Compass Circuit Part 2:

CIRCUIT OPERATION
The compass sensor signal flows through the compass-ECU to multi-center display.

TECHNICAL DESCRIPTION (COMMENT)
If the compass is only not displayed on the multi-center display, the cause may be a malfunction of the compass-ECU.

TROUBLESHOOTING HINTS
- Malfunction of the compass-ECU
- Damaged wiring harness and connectors

DIAGNOSIS

Required Special Tool:
- MB991223: Harness Set










STEP 1. Check the compass-ECU connector C-38 and compass sensor connector D-23for damage.

Q: Are the compass-ECU connector C-38 and compass sensor D-23 in good condition?

YES: Go to Step 2.

NO: Repair or replace the connector. Refer to Harness Connector Inspection.

STEP 2. Check the compass sensor connector D-23 and compass-ECU connector C-38.










1. Disconnect the compass sensor connector D-23 and compass-ECU connector C-38, measure at the harness side.




2. Measure the resistance between compass sensor connector D-23 and compass-ECU connector C-38.

Q: Is the resistance value less than two ohm?

YES: Go to Step 3.

NO: Repair the wiring harness.




STEP 3. Check the compass-ECU connector C-37 and multi-center display connector C-09 for damage.

Q: Are the compass-ECU connector C-37 and multi-center display connector C-09 in good condition?

YES: Go to Step 4.

NO: Repair or replace the connector. Refer to Harness Connector Inspection.

STEP 4. Check the compass-ECU connector C-37 and multi center display connector C-09.




1. Disconnect the compass-ECU connector C-37 and multi-center display connector C-09, measure at the harness side.




2. Measure the resistance between compass-ECU connector C-37 and multi-center display connector C-09.

Q: Is the resistance value less than two ohm?

YES: Go to Step 5.

NO: Repair the wiring harness.

STEP 5. Replace the compass sensor.

1. Replace the compass sensor.
2. The system should communicate with the compass is normally.

Q: Is the compass displayed correctly?

YES: No action to be taken.

NO: Replace the compass-ECU.