2001 Polo - erratic windows

There is no relay for power windows !
Power Window System Components
The power window system consists of the following components:
?€¢
Driver window switch

?€¢
Front Passenger window switch

?€¢
Left Rear window switch

?€¢
Right Rear window switch

?€¢
Window regulator motors in each of the doors

?€¢
PWR WINDOWS PWR SUNROOF Circuit Breaker 30A

When the ignition switch is in the RUN or ACCY position, or Retained Accessory Power (RAP) is enabled and the lockout switch is disengaged, battery positive voltage will be available at the passenger window switches. When an individual window switch is pressed in the down position, battery positive voltage is applied to the window regulator motor causing that window to open. When the individual window switch is pressed in the up position, voltage is applied to the window regulator motor in the opposite direction causing that window to close. The return path to ground is supplied through the inactive control circuit being normally grounded through the driver window switch.

You don't know what your getting into , The door switches have electronic control modules incorporated ,DDM- Driver door module an PDM passenger door module .
The power window system consists of the following components:
?€¢
Driver Door Module (DDM)

?€¢
Passenger Door Module (PDM)

?€¢
Body Control Module (BCM)

?€¢
RR power window switch

?€¢
Window up and window down relays in each of the rear passenger window switches

?€¢
Window lockout switch

?€¢
Reversible power window motors in each of the doors (circuit breaker protected)

?€¢
LT DOOR CB 25A (System power for left windows)

?€¢
RT DOOR CB 25A (System power for right windows)

The DDM contains four power window switches which are integral components. Closing any of the normally open, rocker type switches provides the DDM with a request for power window operation. The switches for the two front windows have three positions UP, Down and Express Down, while the switches for the rear windows have only two positions, UP and Down. Each of these switches and their positions is a direct input into the DDM. Upon receiving a request for power window operation, the DDM, transmits a Class 2 message indicating the switch and it's changed position.
The PDM contains a single power window switch that is an integral component. Closing of this normally open, rocker switch provides the PDM with a request for the front passenger power window operation. The switch for the front passenger window has two positions Up and Down. Each of these switch positions is a direct input to the PDM.
The two rear passenger doors have there own switches. Each of the switches contain a power window up and down relay. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a Class 2 message from the DDM, can control the set of relays which will activate the rear window motors.
You need a scan tool to diagnose these systems
Power Window Inoperative - Driver Door

1

Did you perform the Door Systems Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Door Systems

2

Operate the driver power window in the UP and DOWN directions.
Does the driver power window operate properly?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
Go to Step 3

3

1. Install a scan tool.
2. Monitor the driver window status data parameter in the driver door inputs list.

Does the driver window status data parameter display an active state?
Go to Step 11
Go to Step 4

4

1. Monitor the driver window status data parameter in the driver door module inputs list.
2. Activate the driver power window switch in the up and down positions.

Does the driver window status data parameter change accordingly?
Go to Step 5
The data link connector (DLC) allows a scan tool to communicate with the class 2 serial data line. The serial data line is the means by which the microprocessor-controlled modules in the vehicle communicate with each other. Once the scan tool is connected to the class 2 serial data line through the DLC, the scan tool can be used to monitor each module for diagnostic purposes and to check for diagnostic trouble codes (DTCs). Class 2 serial data is transmitted on a single wire at an average of 10.4 kbps.

You

I had this same problem I changed the master switch in the driver door and it fixed the windows and it may be your power lock switch there to.

Before you replace anything, inspect the connector pins in both the driver's door switch and the passenger door switch. If you don't find any problem with these connector pins, replace the driver's door control switch.

Junk the stupid van and get something else

Power Windows Operation
The vehicle is equipped with power windows controlled by the door modules. Each passenger door power window can be operated, either from a switch built into the driver door switch assembly (DDSA), or from a switch mounted locally on its associated door. The driver door power window can only be operated from the switch built into the DDSA.
If the driver door module (DDM) receives a window switch request from any of the window switches built into the DDSA, the DDM checks the Class 2 serial data to see if conditions are correct (i.e. ignition switch position) to permit window operation to occur. If conditions are correct, the DDM, either supplies power and ground to its associated window motor, or sends a command via the power door serial data line to the passenger door module controlling the window. The passenger door module controlling the window then supplies power and ground to its associated window motor to move the window as requested.
When one of the local window switches mounted on one of the passenger doors is operated, the associated passenger door module examines the request and checks to see if there are any messages from the DDM prohibiting the window operation. If conditions are correct, and no prohibitive messages have been received from the DDM, the associated passenger door module then supplies power and ground to its associated window motor to move the window as requested.


Class 2 data network wires under the carpet behind driver seat. Water shorts out the network an and it won't work .
your looking for tan/white wire's and a connector . This is where the problem is .

it's working from the drivers side. i would assume the passenger switch is bad or there is a wire disconnected from the switch.

Carefully remove the window switch, open it and spray electrical contact cleaner on contacts. Try it now. You may need to remove door panel and lubricate guides and tracks for window. Let me know.

I removed all 3 switches from driver and passenger door, which is really easy with a flat head screw driver. took them completely apart, very carefully, with a small screwdriver out of a christmas cracker. put them back together again and 2 switches started working, so I put 1 in the drivers side and 1 in the passengers side so now my drivers door window opens and I lean over to open the passenger door. cool, no money spent...yet ;o)

I had the same problem with my driver side window, so I just replaced the power window motor. It took less than an hour, cost about $35 or $40 and it works perfectly now.