B316B
DTC B316B, B317A, B318A, or B319A
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 00
- Driver Window Switch
DTC B316B 02
- Driver Window Switch Short to Ground
DTC B316B 39
- Driver Window Switch Internal Malfunction
DTC B317A 02
- Passenger Window Switch Short to Ground
DTC B317A 39
- Passenger Window Switch Internal Malfunction
DTC B318A 02
- Left Rear Window Switch Short to Ground
DTC B318A 39
- Left Rear Window Switch Internal Malfunction
DTC B319A 02
- Right Rear Window Switch Short to Ground
DTC B319A 39
- Right Rear Window Switch Internal Malfunction
Diagnostic Fault Information
Circuit/System Description
When a window switch is pressed on the driver window switch, a serial data message is sent to the body control module (BCM). The BCM examines the request and checks for messages from other power window motors prohibiting the window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the passenger window motor or to the appropriate rear window switch which will perform the command as requested.
Conditions for Running the DTC
Battery voltage must be between 9-16 V.
Conditions for Setting the DTC
B316B 00
The BCM has detected the driver right front or left rear or right rear window switch 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.
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
B316B 39, B317A 39, B318A 39, B319A 39
The BCM has detected an internal failure within the affected door switch
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, B317A 39, B318A 39, B319A 39
If the DTC is current, the affected 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 (Connector End Views By Name)
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 (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, verify that each of the scan tool parameters listed below are Inactive:
* Front Passenger Main Control Down Switch
* Front Passenger Main Control Express Switch
* Front Passenger Main Control Up Switch
* 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
• If any of the parameters are always Active, replace the S79D window switch-driver.
2. Verify that the scan tool Left Rear Window Switch at Door parameter is Inactive.
• If not the specified value, replace the S79LR window switch-left rear.
3. Verify that the scan tool Right Rear Window Switch at Door parameter is Inactive.
• If not the specified value, replace the S79RR window switch-right rear.
4. Command the driver window to go UP, DOWN, express UP and express DOWN by using the S79D window switch-driver. The driver window should perform the UP, DOWN, express UP and express DOWN functions.
• If the driver window does not perform as specified, refer to Driver Window Switch Malfunction.
5. Command the passenger window to go UP, DOWN, express UP and express DOWN by using the S79P window switch-passenger. The passenger window should perform the UP, DOWN, express UP and express DOWN function.
• If the passenger window does not perform as specified, refer to Passenger Window Malfunction.
Circuit/System Testing
Driver Window Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. Ignition ON, verify that the scan tool Driver Window Main Control Down Switch parameter is Inactive.
• If not the specified value, test the control circuit terminal 3 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
3. Verify that the scan tool Driver Window Main Control Up Switch parameter is Inactive.
• If not the specified value, test the control circuit terminal 6 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
4. Verify that the scan tool Driver Window Main Control Express Switch parameter is Inactive.
• If not the specified value, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
5. If all circuits test normal, test or replace the S79D window switch-driver.
Passenger Switch Window Malfunction
1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.
2. Ignition ON, test for greater than 10V between the signal circuit terminal listed below and ground:
* Signal circuit terminal 6
* Signal circuit terminal 7
* Signal circuit terminal 8
• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the M74P window motor-passenger.
3. If all circuits test normal, test or replace the S79P window switch-passenger.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Front Side Door Window and Multifunction Switch Replacement (Front Side Door Window and Multifunction Switch Replacement)
* Rear Side Door Window Switch Replacement (Rear Side Door Window Switch Replacement)
* Rear Side Door Window Regulator Motor Replacement (Rear Side Door Window Regulator Motor Replacement)