DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0283 | Electric Rear Defrost Circuit |
| DTC B3819 | Left Rear Window Up Control Circuit |
| DTC B3820 | Left Rear Window Down Control Circuit |
| DTC B3821 | Left Rear Window Relay Power Circuit |
| DTC B3822 | Right Rear Window Up Control Circuit |
| DTC B3823 | Right Rear Window Down Control Circuit |
| DTC B3824 | Right Rear Window Relay Power Circuit |
DIAGNOSTIC CODE INDEX
Diagnostic Starting Point - Fixed and Moveable Windows
Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information
- The identification of the control modules which command the system.
- The ability of the control modules to communicate through the serial data circuit.
- The identification of any stored diagnostic trouble codes (DTC) and their status.
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Ignition ON/Engine OFF/Vehicle in PARK/All Doors Closed | |||
| Battery 1 (Low Current) | Data | Volts | 12.8 |
| Battery 2 (High Current) | Data | Volts | 12.8 |
| Boot S/W Part No. | Module Info. | Decimal | 15XXXXXX |
| Boot S/W Suffix | Module Info. | ASCII | 15XXXXXX |
| Cal. Module 1 Part No. | Module Info. | Decimal | 15XXXXXX |
| Cal. Module 1 Part No. | Module Info. | ASCII | 15XXXXXX |
| Cal. Module 2 Part No. | Module Info. | Decimal | 15XXXXXX |
| Cal. Module 2 Part No. | Module Info. | ASCII | 15XXXXXX |
| Driver LF Window Switch | Inputs | Idle, Up, Down, Express Down | Idle |
| Driver RF Window Switch | Inputs | Idle, Up, Down, Express Down | Idle |
| LR Window Switch | Inputs | Idle, Up, Down | Idle |
| Operational S/W Part No. | Module Information | Decimal | 15XXXXXX |
| Operational S/W Suffix | Module Information | ASCII | XX |
| Psgr RF Window Switch | Inputs | Idle/Up/Down/Express Down | Idle |
| Right Rear Window Status | Inputs | Idle, Up, Down | Idle |
| Window Lockout Switch | Inputs | Inactive/Active | Inactive |
| Window Lockout LED | Outputs | On, Off | Off |
| Window Motor Current | Data | MA | 0 |
| Window Motor Output | Outputs | Idle, Up, Down | Idle |
Driver Door Module/Passenger Door Module
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Ignition ON/Engine OFF/Vehicle in PARK/All doors closed | |||
| Battery Voltage | Data | Volts | Varies |
| Right Rear Window Up Relay | Outputs | Inactive/Active | Inactive |
| Right Rear Window Down Relay | Outputs | Inactive/Active | Inactive |
| Left Rear Window Up Relay | Outputs | Inactive/Active | Inactive |
| Left Rear Window Down Relay | Outputs | Inactive/Active | Inactive |
Body Control Module
Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Left Rear Window | Miscellaneous Test | The BCM will control the left window up when you select Up. The BCM will control the left window down when you select Down. |
| Right Rear Window | Miscellaneous Test | The BCM will control the right window up when you select Up. The BCM will control the right window down when you select Down. |
| Rear Defogger | The BCM actuates the rear window defogger relay when you select ON. The rear window defogger grid should become warm. |
Body Control Module
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Window Up/Down | Output Control | The DDM or PDM will command the window up and down |
| Passenger Window Lockout Indicator | Output Control | The DDM will command the window lockout indicator on when you select ON and turn it off when you select OFF |
Driver Door Module and Passenger Door Module
Circuit Description
The body control module (BCM) monitors the voltage level on the control circuit of the DEFOG relay. The voltage level should be near system voltage while the DEFOG relay is de-energized. The voltage will be pulled low when the BCM energizes the DEFOG relay. The BCM tests the control circuit of the DEFOG relay every 125 milliseconds.
DTC Descriptor
This diagnostic procedure supports the following DTC
DTC B0283 Electric Rear Defrost Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
One of the following conditions will cause this DTC to set
- The BCM detects a high voltage level on the control circuit of the DEFOG relay, while the relay is energized.
- The BCM detects a low voltage level or an open on the control circuit of the DEFOG relay, while the relay is not energized.
Conditions for Clearing the DTC
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
The body control module (BCM) grounds the control side of the left rear power window up relay upon receiving a class 2 message from the driver door module (DDM).
This diagnostic procedure supports the following DTC
DTC B3819 Left Rear Window Up Control Circuit
- Battery voltage is between 9-16 volts.
- The BCM has received a class 2 message from the DDM and has grounded the left rear power window relay control circuit.
- When the BCM has grounded the left rear power window up relay control circuit and the control circuit is shorted to battery positive voltage.
- The above condition is met for 250 milliseconds.
Action Taken When the DTC Sets
The left rear power window will be inoperative from both the driver and left rear power window switches.
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
The body control module (BCM) grounds the control side of the left rear power window down relay upon receiving a class 2 message from the driver door module (DDM).
This diagnostic procedure supports the following DTC
DTC B3820 Left Rear Window Down Control Circuit
- Battery voltage is between 9-16 volts.
- The BCM has received a class 2 message from the DDM and has grounded the left rear power window down relay control circuit.
- When the BCM has grounded the left rear power window down relay control circuit and the control circuit is shorted to battery positive voltage.
- The above condition is met for 250 milliseconds.
The left rear power window will be inoperative from both the driver and left rear power window switches.
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
Battery positive voltage is supplied to the left rear power window switch and the up and down relays through the window lockout signal circuit. If the window lockout function is disabled, the body control module (BCM) supplies battery positive voltage to the switch and relays and the left rear window operates normally. If the window lockout function is enabled, the BCM will not supply battery positive voltage to the switch and relays and the left rear window will be inoperative unless it is operated from the driver power window switch.
This diagnostic procedure supports the following DTC
DTC B3821 Left Rear Window Relay Power Circuit
- Battery voltage is between 9-16 volts.
- The window lockout function is disabled.
- The window lockout function is disabled and the window lockout signal circuit is shorted to ground.
- The above condition must be met for 250 milliseconds.
The left rear power window will be inoperative from both the driver and passenger power window switches.
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Moveable Window Schematics Connector End View Reference: Window Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Disable the window lockout function. With a scan tool, command the left rear power window UP and DOWN. Does the left rear power window operate UP and DOWN with each command? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the left rear power window switch. Turn ON the ignition, with the engine OFF. Ensure the window lockout function is disabled. Probe the window lockout signal circuit with a test lamp connected to a good ground. Does the test lamp illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 4 |
| 4 | Test the window lockout signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
| 6 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | |
| 7 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B3821
The body control module (BCM) grounds the control side of the right rear power window up relay upon receiving a class 2 message from the driver door module (DDM).
This diagnostic procedure supports the following DTC
DTC B3822 Right Rear Window Up Control Circuit
- Battery voltage is between 9-16 volts.
- The BCM has received a class 2 message from the DDM and has grounded the right rear power window relay control circuit.
- When the BCM has grounded the right rear power window up relay control circuit and the control circuit is shorted to battery positive voltage.
- The above condition is met for 250 milliseconds.
The right rear power window will be inoperative from both the driver and right rear power window switches.
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
The body control module (BCM) grounds the control side of the right rear power window down relay upon receiving a class 2 message from the driver door module (DDM).
This diagnostic procedure supports the following DTC
DTC B3823 Right Rear Window Down Control Circuit
- Battery voltage is between 9-16 volts.
- The BCM has received a class 2 message from the DDM and has grounded the right rear power window down relay control circuit.
- When the BCM has grounded the right rear power window down relay control circuit and the control circuit is shorted to battery positive voltage.
- The above condition is met for 250 milliseconds.
The right rear power window will be inoperative from both the driver and right rear power window switches.
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
Battery positive voltage is supplied to the right rear power window switch and the up and down relays through the window lockout signal circuit. If the window lockout function is disabled, the body control module (BCM) supplies battery positive voltage to the switch and relays and the right window operates normally. If the window lockout function is enabled, the BCM will not supply battery positive voltage to the switch and relays and the right rear window will be inoperative unless it is operated from the driver power window switch.
This diagnostic procedure supports the following DTC
DTC B3824 Right Rear Window Relay Power Circuit
- Battery voltage is between 9-16 volts.
- The window lockout function is disabled.
- The window lockout function is disabled and the window lockout signal circuit is shorted to ground.
- The above condition must be met for 250 milliseconds.
The right rear power window will be inoperative from both the driver and passenger power window switches.
When the fault is no longer present, the BCM changes the current DTC to a history DTC. The BCM will clear the history DTC after 50 fault-free ignition cycles.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Moveable Window Schematics Connector End View Reference: Window Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Install a scan tool. Turn ON the ignition, with the engine OFF. Disable the window lockout function. With a scan tool, command the right rear power window UP and DOWN. Does the right rear power window operate UP and DOWN with each command? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the right rear power window switch. Turn ON the ignition, with the engine OFF. Ensure the window lockout function is disabled. Probe the window lockout signal circuit with a test lamp connected to a good ground. Does the test lamp illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 4 |
| 4 | Test the window lockout signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
| 6 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | |
| 7 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B3824
Symptoms - Fixed and Moveable Windows
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform the «Diagnostic System Check - Vehicle»(ref-277883-S07139257572008012100000) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
- Review the system operation in order to familiarize yourself with the system functions. Refer to the following system descriptions: «Power Windows Description and Operation»(ref-277847-S38748508662008012100000) «Rear Window Defogger Description and Operation»(ref-277847-S32825010622008012100000)
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the power door lock, power window and power mirror systems. Refer to «Checking Aftermarket Accessories»(ref-277884-S30236091172008012100000) .
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
- «Defogger Grid Lines Diagnosis»(ref-277847-S06670643952008012100000)
- «Rear Window Defogger Inoperative»(ref-277847-S20929107622008012100000)
- «Power Window Inoperative - Driver Door»(ref-277847-S05591655462008012100000)
- «Power Window Inoperative - Passenger Door (Front)»(ref-277847-S37446083832008012100000) or «Power Window Inoperative - Passenger Door (Rear)»(ref-277847-S24389530832008012100000)
- «Power Window Express Down Function Inoperative»(ref-277847-S19779316602008012100000)
- «Power Window Lockout Function Inoperative»(ref-277847-S09523670122008012100000)
Defogger Grid Lines Diagnosis
This test is for reference only. A grid line fault requires the rear window replacement. Refer to Rear Window Replacement .
Scheme 9
- Start the engine.
- Activate the rear window defogger system.
- Connect a test lamp to a good ground.
- Move the test lamp probe from zone 5 to zone 1 along each grid line. If the test lamp shows full brilliance at both ends of the grid lines. Inspect for an open or poor connection in the ground circuit of the rear window defogger grid. Refer to «Testing for Intermittent Conditions and Poor Connections»(ref-277884-S20700666652008012100000) and «Connector Repairs»(ref-277884-S12371167392008012100000) . If the test lamp goes out, test the grid line in at least 2 places (1,3) to eliminate the possibility of bridging the open (2) in the grid line.