Power Window - Will Not Raise After Using Auto-Down
NO.: TSB-96-42A-021DATE: October, 1996
MODEL: 1993-95 Diamante Wagon
SUBJECT:
POWER WINDOW AUTO DOWN
PURPOSE
This bulletin contains procedures for correcting a condition where the driver's door glass fails to raise after being lowered with the auto down switch.
BACKGROUND INFORMATION
CAUSE
Sometimes, when the door glass reaches the bottom stops, the motor stall current is too low for the sensing circuit to detect. When this happens, the module tripping relay fails to "click off," which keeps the window from raising. The window will remain in the down position until the motor temperature protection activates after the motor has cooled down. When the motor cools down the window will raise normally.
REMEDY
To correct this condition, the current sensing bar must be filed slightly to lower the stall current sensing range of the module. As a result, the motor stall current falls within the sensing range and is detected, successfully tripping the relay allowing the window to be raised.
AFFECTED VEHICLES
1993-95 Diamante Wagon
PROCEDURE
1. Remove the driver's door switch control unit from the door trim.
2. Unplug the switch from the door wiring harness.
3. Disassemble the switch.
(a) Remove the single screw that holds the yellow back cover onto the switch control unit.
(b) Remove the cover from the switch unit.
(c) Unclip the second printed circuit board from this inside cover.
4. With a 1/4 inch (6 mm) square or similar file, file the top surface of the silver bar between the 5-pin plug and the black covered miniature relay. The original diameter of the bar is 0.055 inch (1.4 mm). File the bar evenly so that the remaining material is between 0.035 and 0.040 inch (O.9 mm - 1.0 mm) thick. Use a vernier caliper to accurately measure the thickness.
Note: Be sure to file the bar precisely. If the bar is filed to less that 0.03 inch (O.75mm) thickness, the window may stop part way down. If the bar is not filed enough, the original symptom will remain.
5. Inspect the printed circuit board for metal filings and clean if necessary. Also make sure that the edge of the relay was not damaged by the file.
6. Test the operation.
(a) Plug the switch control unit into the door wiring harness with the switch still dismantled.
(b) Test for correct operation with the engine OFF.
- Lower the driver's window with the auto down switch while confirming that the relay in the module clicks off within 5 seconds. Raise the glass fully.
- Repeat three times.
If the door module relay does not click off, file the silver bar a little more, making the measurement closer to 0.035 inch (0.9 mm).
Note: Let the motor cool down before trying to raise the glass again.
(c) Unplug the harness after you have verified correct operation.
7. Reassemble the switch, plug the switch into the harness, and reinstall the switch into the door trim.
WARRANTY INFORMATION
Door Control Unit Switch Repair
Nature Code: 91Z Cause Code: 450
Labor Operation No. 42820100 Time Allowance: 0.5hr.
Warranty Coverage: 36 months/36,000 miles.
Special Warranty Information: Normal warranty procedures apply.