Inspection Procedure 2

Compass is not Displayed.

Compass Circuit:

Connector:

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 harness wires and connectors

DIAGNOSIS

Required Special Tool:
- MB991223: Harness Set










STEP 1. Check the compass-ECU connector C-38 and compass sensor connector D-23 for 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 it. Refer to Harness Connector Inspection.










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

1. Do not 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 by backprobing.

Q: Is the resistance value less than two ohm?

YES: Go to Step 3.

NO: Repair or replace it. Refer to Harness Connector Inspection.




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 it. Refer to Harness Connector Inspection.




STEP 4. Check the compass-ECU connector C-37 and multi center display connector C-09 by backprobing.
1. Do not 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 by backprobing.

Q: Is the resistance value less than two ohm?

YES: Replace the compass-ECU or compass sensor.

NO: Repair or replace it. Refer to Harness Connector Inspection.