Inspection Procedure 2

No Compass is Displayed.

Compass Circuit:

Connector:

CIRCUIT OPERATION
Compass sensor signal through the compass-ECU and multi-center display.

TECHNICAL DESCRIPTION (COMMENT)
Malfunction of compass-ECU, no compass displayed.

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-17 and compass sensor connector D-01 for damage.

Q: Are the compass-ECU connector C-17 and compass sensor D-01 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-01 and compass-ECU connector C-17 by backprobing.
1. Do not disconnect the compass sensor connector D-01 and corn pass-ECU connector C-17, measure at the harness side.




2. Measure the resistance between compass sensor connector D-01 and compass-ECU connector C-17 by backprobing.

Q: Is the resistance value less than 2 ohm?

YES: Go to Step 3.
NO: Repair or replace it. Refer to Harness Connector Inspection.







STEP 3. Check the compass-ECU connector C-16 and multi-center display connector C-08 for damage.

Q: Are the compass-ECU connector C-16 and multi-center display connector C-08 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-16 and multi-center display connector C-08 by backprobing.
1. Do not disconnect the compass-ECU connector C-16 and multi-center display connector C-08, measure at the harness side.




2. Measure the resistance between compass-ECU connector C-16 and multi-center display connector C-08 by backprobing.

Q: Is the resistance value less than 2 ohm?

YES: Replace the compass-ECU.
NO: Repair or replace it. Refer to Harness Connector Inspection.