Inspection Procedure 3

INSPECTION PROCEDURE 3: The Sunroof Lid Glass does not Open (Tilt-up, Tilt-down, And Close Normally).

CAUTION:
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.










TECHNICAL DESCRIPTION (COMMENT)

The sunroof switch or the sunroof motor assembly may be defective.

TROUBLESHOOTING HINTS

- The sunroof switch may be defective

- The sunroof motor assembly may be defective

- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSTIC PROCEDURE

Required Special Tools:

- MB992006: Extra fine probe

- MB991223: Harness set

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V.C.I.)

- MB991827: M.U.T.-III USB Cable

- MB991910: M.U.T.-III Main Harness A

STEP 1. Using scan tool MB991958, read the diagnostic trouble code.





(1)
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."
(2)Turn the ignition switch to the "ON" position.
(3)Check whether the sunroof motor assembly related DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Diagnose the sunroof motor assembly. Refer to Sunroof System.

NO Go to Step 2.

STEP 2. Check sunroof switch connector D-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is sunroof switch connector D-04 in good condition?

YES Go to Step 3.
NO Repair or replace the damaged component(s). Harness Connector Inspection. Check that the sunroof works normally.
STEP 3. Sunroof switch check

(1)Remove the sunroof switch. Refer to Removal and Replacement.





(2)Check continuity when the sunroof switch is operated to "OPEN" position.





Q. Is the sunroof switch normal?

YES Go to Step 4.

NO Replace the sunroof switch. Check that the sunroof works normally.

STEP 4. Check sunroof motor assembly connector D-05 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is sunroof motor assembly connector D-05 in good condition?

YES Go to Step 5.
NO Repair or replace the damaged component(s). Harness Connector Inspection. Check that the sunroof works normally.
STEP 5. Check the wiring harness between sunroof switch connector D-04 (terminal 5) and sunroof motor assembly connector D-05 (terminal 5).

Q. Is the wiring harness between sunroof switch connector D-04 (terminal 5) and sunroof motor assembly connector D-05 (terminal No. 5) in good condition?

YES Go to Step 6.
NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the sunroof works normally.
STEP 6. Retest the system.

Check that the sunroof lid glass opens.

Q. Is the check result normal?

YES No action is necessary and testing is complete.
NO Replace the sunroof motor assembly. Check that the sunroof works normally.