Inspection Procedure 6

INSPECTION PROCEDURE 6: Power Window Anti-trap Function does not work Normally. [Driver's side only]










COMMENTS ON TROUBLE SYMPTOM

Malfunction of the power window motor revolution detection sensor is suspected.

PROBABLE CAUSES

- Malfunction of the power window motor
- Damaged wiring harness and connectors

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 power window main switch related DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Diagnose the power window main switch. Refer to Diagnostic trouble code chart Power Window System.

NO Go to Step 2.

STEP 2. Check the power window operating current.

Check that the power window operating current is normal (Refer to Power Window Operating Current Check).

Q. Is the power window operating current normal?

YES Door window glass adjustment (Refer to Adjustments). Then go to Step 3.
NO Replace the power window motor. Verify that the power window anti-trap function works normally.
STEP 3. Confirm the power window learning function.

Check that the power window switch has learned the fully closed position of the windows.

Q. Is the power window learning function normal?

YES Go to Step 4.
NO Make the power window switch learn the fully closed position of the windows (Refer to Programming and Relearning). Verify that the power window anti-trap function works normally.
STEP 4. Check power window main switch connector E-15, front power window motor (LH) connector E-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Are power window main switch connector E-15, front power window motor (LH) connector E-14 in good condition?

YES Go to Step 5.
NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that the power window anti-trap function works normally.
STEP 5. Check the wiring harness between power window main switch connector E-15 (terminals 8, 9, 11, 12) and front power window motor (LH) connector E-14 (terminals 3, 5, 2, 6).

- Check the signal line for open circuit and short circuit.

Q. Is the wiring harness between power window main switch connector E-15 (terminals 8, 9, 11, 12) and front power window motor (LH) connector E-14 (terminals 3, 5, 2, 6) 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. Verify that the power window anti-trap function works normally.
STEP 6. Retest the system.

Check that the power window anti-trap function works normally.

Q. Is the power window anti-trap function normal?

YES No action is necessary and testing is complete.
NO Replace the front power window motor (LH). Verify that the power window anti-trap function works normally.