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 Descriptors
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 Switch B+ | 1, 3 | 1 | -- | -- |
LR Window Switch B+ | 1, 3 | 3 | -- | -- |
Passenger Door Switch B+ | 2, 4 | 2 | -- | -- |
RR Window Switch B+ | 2, 4 | 4 | -- | -- |
Power Window Switch Right Rear Down Signal | B3823 | B3823 | B3823 | -- |
Power Window Switch Right Rear Up Signal | B3822 | B3822 | B3822 | -- |
Power Window Switch Left Rear Down Signal | B3820 | B3820 | B3820 | -- |
Power Window Switch Left Rear Up Signal | B3819 | B3819 | B3819 | -- |
Power Window Lockout Left Rear Control | B3821 | B3821 | B3821 | -- |
Power Window Lockout Right Rear Control | B3824 | B3824 | B3824 | -- |
LR Window Motor Control | 3 | 3 | 3 | -- |
Passenger Window Motor Control | 2 | 2 | 2 | -- |
RR Window Motor Control | 4 | 4 | 4 | -- |
Driver Window Motor Control | 1 | 1 | 1 | -- |
Driver Door Switch Ground | -- | 1,3,4 | 1,3,4 | -- |
LR Window Switch Ground | -- | 3 | 3 | -- |
Passenger Door Switch Ground | -- | 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 passenger power windows can also be operated from the DDS through a serial data message to the BCM. The rear passenger window switches on the DDS have 2 positions, up and down, their position is a direct input into the DDS. When the BCM receives a command to operate a rear window up or down the appropriate signal circuit to the rear door window switch.
Conditions for Running the DTC
Battery voltage is between 9-16 volts.
Conditions for Setting the DTC
B3819
The 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 left or right rear power window will be inoperative from the driver master control.
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
Connector End View Reference
Description and Operation
Power Windows Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Command the appropriate rear door window UP and DOWN with a scan tool. The rear door window should perform the UP and DOWN function.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
- Ignition ON, test for greater than 9 volts between the signal circuit terminal C and ground while commanding the rear window UP with a scan tool.
- Test for greater than 9 volts between the signal circuit terminal B and ground while commanding the rear window DOWN with a scan tool.
- If all circuits test normal, replace the rear window switch.
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM. |
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or open/high resistance. 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 |
