Power Window System - Troubleshooting

Group: 64

Number: 91-03

Date: Nov. 30, 1991

Subject:
Power Window Troubleshooting

Model(s):
Passat from 1990 m.y.
Supercedes 91-02, Dated Sept. 30, 1991

Power window system, Troubleshooting

General Information

Check the following before troubleshooting power windows:

^ Ensure customer is operating power windows according to owners manual.

^ Determine if one, more than one, or all power windows are not functioning.

^ Ensure window lock-out switch is ON (if switch is OFF, rear windows cannot be operated from rear doors.)

^ Ensure retained power supply (ignition OFF) for windows is interrupted by opening the driver or passenger front door.

Note
Refer to the appropriate wiring diagram when performing all troubleshooting.

Power window control unit, J139

Controls the following:

^ One-touch down window operation (relay is energized approximately eight seconds during operation.)

^ Automatic closing of windows during vehicle locking from outside door lock.

^ Retained power supply (ignition OFF) for windows until either front door is opened.

Circuit breakers/fuses

^ S43 (20A) circuit breaker for power window motor operation (located in auxiliary relay panel above fuse/relay panel.)

^ S14 (10A) fuse for power window control unit (located in fuse/relay panel.)

Test Conditions

^ Battery OK (charged)
^ Front door contact switches (driver and passenger side) OK
^ Fuses OK

Tools required:

^ Use multimeter Fluke 83 (US 1119) for all electrical tests

^ Use connector test kit VW 1594 for all electrical test connections

^ Jumper wire:
Prepare 5 inch long 14 AWG wire and crimp to both ends 6.3 mm spade terminal

^ Toggle switch jumper:
Use 25 Amp toggle on/off switch and connect to switch terminals 3 inch 14 AWG wire ends with crimped on 6.3 mm spade terminals