Inspection Procedure O-20

Sunroof Switch: the Open, Close/Tilt-Down, or Tilt-Up Switch Signal Is Not Sent to the ETACS-ECU

Sunroof Switch Input Circuit And SWS Communication Circuit:

CIRCUIT OPERATION
The ETACS-ECU receives a signal from the sunroof switch through the sunroof motor assembly, and sends the input signal to the data link connector.

TECHNICAL DESCRIPTION (COMMENT)
If the SWS communication line between the sunroof motor assembly and the ETACS-ECU is defective, the sunroof switch input signal can not be checked even if the sunroof is normal.

TROUBLESHOOTING HINTS
- Malfunction of the sunroof switch Malfunction of the sunroof motor assembly
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set

STEP 1. Check the sunroof operation.

Q: Does the sunroof work normally?

YES: Go to Step 2.

NO: Solve the problem first. Refer to Inspection Procedure F-1.







STEP 2. Check sunroof motor assembly connector D-06 and ETACS-ECU connector C-111 for damage.

Q: Are sunroof motor assembly connector D-06 and ETACS-ECU connector C-111 in good condition?

YES: Go to Step 3.

NO: Repair or replace them. Refer to Harness Connector Inspection. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.










STEP 3. Check the harness wires between sunroof motor assembly connector D-06 and ETACS-ECU connector C-111.

NOTE: After checking intermediate connector C-31 and joint connector C-78, check the wires. If intermediate connector C-31 and joint connector C-78 are damaged, repair or replace them. Refer to Harness Connector Inspection.

Q: Are the harness wires between sunroof motor assembly connector D-06 and ETACS-ECU connector C-111 in good condition?

YES: Go to Step 4.

NO: Repair them. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.

STEP 4. Replacement of ECU
1. Replace the sunroof motor assembly.
2. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.

Q: Is the input signal from the sunroof switch input normally?

YES: There is no action to be taken.

NO: Replace the ETACS-ECU. The input signal from the sunroof switch should be able to be checked and the sunroof should work normally.