For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptor

DTC B3803 00: Windows Comfort Closing Circuit Malfunction

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Driver Window Motor B+ | 1 | 1 | -- | --
Driver Window Switch Ignition | B1390 02 | 1 | -- | --
Passenger Window Motor B+ | 2 | 2 | -- | --
Passenger Window Switch Ignition | B1390 02 | 2 | -- | --
Passenger Window Switch Down Signal | B1390 02 | 2 | 2 | --
Passenger Window Switch Up Signal | B1390 02 | 2 | 2 | --
Driver Window Motor Down Control | B1390 02 | 1 | 1 | --
Driver Window Motor Comfort Closing Control | B3803 00 | 1 | 1 | --
Driver Window Motor Up Control | B1390 02 | 1 | 1 | --
Passenger Window Motor Down Control | B1390 02 | 2 | 2 | --
Passenger Window Motor Comfort Closing Control | B3803 00 | -- | -- | --
Passenger Window Motor Up Control | B1390 02 | 2 | 2 | --
Driver Window Motor Ground | -- | 1 | 1 | --
Passenger Window Motor Ground | -- | 2 | 2 | --
1. Driver Power Window Malfunction 2. Front Passenger Window Malfunction

### Circuit/System Description

The front power windows are controlled by the driver window switch, front passenger window switch and the rear fuse block. The driver window switch contains the master power window switch that controls all power window operations. When a power window switch is activated to a desired position, power window switch will send a signal to it’s respective door window motor to move the window to the desired position. The window motors may also receive a comfort closing command from the rear fuse block which will cause all windows to perform the express down function.

### Conditions for Running the DTC

• | Battery voltage must be between 9-16 volts.

• | The ignition is ON

### Conditions for Setting the DTC

The rear fuse block detects a short to ground or an open/high resistance in the comfort closing control circuit.

### Action Taken When the DTC Sets

The comfort closing function will be inoperative.

### Conditions for Clearing the DTC

• | The DTC will be current for as long as the fault is present.

• | When the fault is no longer present, the DTC will be a history DTC.

• | A history DTC will clear after 50 ignition cycles.

### Reference Information

#### Schematic Reference

Moveable Window Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Power Windows Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

With the doors locked, command all the windows to express DOWN by pressing and holding the unlock button on the remote keyless entry transmitter, all windows should perform the express DOWN function.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate window motor.
2. Connect a test lamp between the control circuit terminal 6 and B+.
3. Ignition ON, command the windows to Comfort Closing UP and DOWN with a scan tool. The test lamp should illuminate when commanding the UP and DOWN states.

⇒ | If the test lamp is always OFF during either of the commands, test the control circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the rear fuse block.

⇒ | If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the rear fuse block.

4. If all circuits test normal, replace the window motor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Front Side Door Window Regulator Motor Replacement

• | Rear Side Door Window Regulator Motor Replacement

• | Control Module References for rear fuse block replacement, setup, and programming