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 B3819: Left Rear Window Up Control CircuitDTC B3820: Left Rear Window Down Control Circuit
DTC B3822: Right Rear Window Up Control Circuit
DTC B3823: Right Rear Window Down Control Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Driver Door Module B+ | U0199 | U0199 | -- | -- |
Driver Window Motor B+ | U1511, B320A 4B | U1511, B320A 4B | -- | -- |
LR Window Switch B+ | 1, 2, 3, 4 | 3 | -- | -- |
Passenger Door Module B+ | 2 | 2 | -- | -- |
Passenger Window Motor B+ | 1, 2, 3, 4 | 2 | -- | -- |
RR Window Switch B+ | 1, 2, 3, 4 | 4 | -- | -- |
Driver Window Motor Serial Data | U1511, B320A 4B | U1511, B320A 4B | 1 | -- |
Passenger Window Motor Serial Data (AXC) | U1511, B320A 4B | U1511, B320A 4B | 2 | -- |
LR Window Motor Control | 3 | 3 | 3 | -- |
Passenger Window Motor Control (AXE) | 2 | 2 | 2 | -- |
RR Window Motor Control | 4 | 4 | 4 | -- |
Window Master Switch LR Down Control | B3820 | B3820 | B3820 | -- |
Window Master Switch Lockout Control | 3,4 | 3,4 | 3,4 | -- |
Window Master Switch LR Up Control | B3819 | B3819 | B3819 | -- |
Window Master Switch RR Down Control | B3823 | B3823 | B3823 | -- |
Window Master Switch RR Up Control | B3822 | B3822 | B3822 | -- |
Driver Door Module Ground | -- | U0199 | U0199 | -- |
LR Window Switch Ground | -- | 3 | 3 | -- |
Driver Window Motor Ground | -- | U1511 | U1511 | -- |
Passenger Door Module Ground | -- | U1511 | U1511 | -- |
Passenger Window Motor Ground (AXC) | -- | 2 | 2 | -- |
RR Window Switch Ground | -- | 4 | 4 | -- |
1. Driver Window Malfunction 2. Passenger Window Malfunction 3. Left Rear Window Malfunction 4. Right Rear Window Malfunction | ||||
Circuit/System Description
The rear door windows can be raised or lowered by the appropriate rear passenger door switch or the driver master control.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
B3819
The body control module (BCM) detects a fault in the left rear window up circuit.
B3820
The BCM detects a fault in the left rear window down circuit.
B3822
The BCM detects a fault in the right rear window up circuit.
B3823
The BCM detects a fault in the right rear window down circuit.
Action Taken When the DTC Sets
| • | The BCM stores the DTC to memory. |
| • | The rear window control will be inoperative from the driver master control. |
| • | The rear window control will function normally from the appropriate rear window switch. |
Conditions for Clearing the DTC
| • | This DTC will change from current to history when the fault is no longer present. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
Reference Information
Schematic Reference
Connector End View Reference
Window Systems Connector End Views
Description and Operation
Power Windows Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Command the appropriate rear door window DOWN and UP with a scan tool. The appropriate rear door window should go DOWN and UP as commanded.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
- Ignition ON, connect a test lamp between the window master switch up circuit terminal A and ground.
- Command the rear window UP with a scan tool. The test lamp should illuminate while commanding the UP state.
- Connect a test lamp between the window master switch down circuit terminal C and ground.
- Command the rear window DOWN with a scan tool. The test lamp should illuminate while commanding the DOWN state.
- If all circuits test normal, replace the appropriate rear window switch.
| ⇒ | If the lamp is always OFF, test the control circuit for a short to ground or an open/high resistance, if the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the BCM. |
| ⇒ | If the lamp is always OFF, test the control circuit for a short to ground or an open/high resistance, if the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
