Fixed and Moveable Windows (AEC)

DTC B316B, B317A, B318A, or B319A (AEC)

Diagnostic Instructions

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

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

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B316B
- Driver Window Switch

DTC B317A
- Passenger Window Switch

DTC B318A
- Left Rear Window Switch

DTC B319A
- Right Rear Window Switch

For symptom byte information refer to: Symptom Byte List Symptom Byte List

Circuit/System Description

The body control module (BCM) monitors, receives and transmits serial data messages to each of the door window switches. The driver master control contains switches to control the passenger and rear windows. When a switch is used on the driver master control, a serial data message is sent to the BCM which sends a serial data message to the appropriate passenger or rear window switch to move in the window in the direction commanded.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

B316B 00

The BCM has detected the right front or left rear or right rear switch on the driver master control is active for greater than 60 seconds.

B316B 02

The BCM has detected the driver left front window switch is active for greater than 60 seconds.

B316B 39

The BCM has received simultaneous conflicting commands from the driver window switch

B317A 02

The BCM has detected the passenger window switch is active for greater than 60 seconds.

B318A 02

The BCM has detected the left rear window switch is active for greater than 60 seconds

B319A 02

The BCM has detected the right rear window switch is active for greater than 60 seconds

Action Taken When the DTC Sets

The affected power window will malfunction.

Conditions for Clearing the DTC

B316B 00, B316B 02, B317A 02, B318A 02, B319A 02

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

* The 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.

B316B 39

If the DTC is current, the driver window switch must be replaced before the DTC can be cleared.

Reference Information

Schematic Reference

Moveable Window Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Sunshade - Left (D61)

Description and Operation

Power Windows Description and Operation Power Windows

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify the driver window moves while commanding the window UP and DOWN with the driver window master control

• If the driver window does not move, refer to Circuit/System Testing.

• If the driver window moves

3. Verify the passenger, left rear and right rear windows move while commanding each window UP and DOWN with the switches on the driver window master control.

• If a window does not move, refer to Circuit/System Testing.

• If the passenger, left rear and right rear windows move

4. Verify the passenger window moves while commanding the window UP and DOWN with the S79P Window Switch - Passenger.

• If the passenger window does not move, refer to Circuit/System Testing.

• If the passenger window moves

5. Verify the left rear window moves while commanding the window UP and DOWN with the S79LR Window Switch - Left Rear.

• If the left rear window does not move, refer to Circuit/System Testing.

• If the left rear window moves

6. Verify the right rear window moves while commanding the window UP and DOWN with the S79RR Window Switch - Right Rear.

• If the right rear window does not move, refer to Circuit/System Testing.

• If the right rear window moves

7. All OK.

Circuit/System Testing

1. Ignition ON.

2. Verify the scan tool Left Rear Window Main Control Down Switch, Left Rear Window Main Control Express Switch, Left Rear Window Main Control Up Switch, Right Rear Window Main Control Down Switch, Right Rear Window Main Control Express Switch, Right Rear Window Main Control Up Switch, Front Passenger Window Main Control Down Switch, Front Passenger Window Main Control Express Switch, and the Front Passenger Window Main Control Up Switch parameter changes between Inactive and Active when pressing and pulling the right front, right rear and left rear switches on the S79D Window Switch - Driver.

• If the parameters do not change
Replace the S79D Window Switch - Driver.

• If the parameters changes

3. Verify the scan tool Left Rear Window Switch at Door parameter changes between Inactive and Active when pressing and pulling the S79LR Window Switch - Left Rear.

• If the parameters do not change
Replace the S79LR Window Switch - Left Rear.

• If the parameters changes

4. Verify the scan tool Passenger Window Switch at Door parameter changes between Inactive and Active when pressing and pulling the S79P Window Switch - Passenger.

• If the parameters do not change
Replace the S79P Window Switch - Passenger.

• If the parameters changes

5. Verify the scan tool Right Rear Window Switch at Door parameter changes between Inactive and Active when pressing and pulling the S79RR Window Switch - Right Rear.

• If the parameters do not change
Replace the S79RR Window Switch - Right Rear.

• If the parameters changes

6. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Front Side Door Window Switch Replacement - Right Side Front Side Door Window Switch Replacement - Right Side

* Front Side Door Window Switch Replacement - Left Side Front Side Door Window Switch Replacement - Left Side

* Rear Side Door Window Switch Replacement Rear Side Door Window Switch Replacement