Fixed and Moveable Windows (Coupe)
DTC B316B or B317A (Coupe)
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 02
- Driver Window Switch Short to Ground
DTC B317A 02
- Passenger Window Switch Short to Ground
Diagnostic Fault Information
Circuit/System Description
The window motors are supplied with B+ voltage which is used to power the motor and also used as a reference voltage within the logic circuit. When the driver or passenger window switch is pressed, a switch is closed causing the reference voltage in the appropriate circuit in the window motor to drop, the window motor responds by moving the window in the direction commanded.
Conditions for Running the DTC
Battery voltage must be between 9-16 V.
Conditions for Setting the DTC
B316B 02
The driver window motor has detected the driver left front window switch is active for greater than 60 seconds.
B317A 02
The passenger window motor has detected the passenger window switch or the driver right front 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
* The DTC will be current 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.
Reference Information
Schematic Reference
Moveable Window Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
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 scan tool Driver Window Main Control Down Switch, Driver Window Main Control Up Switch, Driver Window Main Control Express Down Switch and Driver Window Main Control Express Up Switch parameter changes between Inactive and Active when pressing and pulling the driver window switch.
• If any parameter does not change
Refer to Circuit/System Testing - Driver Window Switch Malfunction Only.
• If all the parameters change
3. Verify the scan tool Passenger Window Switch at Door parameter changes between Inactive and Up, Express Up, Down, and Express Down when pressing and pulling the passenger window switch and the appropriate switch on the driver window switch.
• If any parameter does not change
Refer to Circuit/System Testing - Driver Or Passenger Window Switch Malfunction.
• If all the parameters change
4. All OK.
Circuit/System Testing
Driver Window Switch Malfunction Only
1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver. Ignition ON
2. Verify the scan tool Driver Window Main Control Down Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver.
2. Test for infinite resistance between the signal circuit terminal 7 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74D window motor-driver.
• If Inactive
3. Install a 3 A fused jumper wire between the signal circuit terminal 3 and ground.
4. Verify the scan tool Driver Window Main Control Down Switch parameter is Active
• If not Active
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver, ignition ON.
2. Test for less than 1 V between the signal circuit terminal 7 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the M74D window motor-driver.
• If Active
5. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver.
2. Test for infinite resistance between the signal circuit terminal 3 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74D window motor-driver.
• If Inactive
6. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
7. Verify the scan tool Driver Window Main Control Up Switch parameter is Active
• If not Active
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver, ignition ON.
2. Test for less than 1 V between the signal circuit 3 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the M74D window motor-driver.
• If Active
8. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver.
2. Test for infinite resistance between the signal circuit terminal 5 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74D window motor-driver.
• If Inactive
9. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground.
10. Verify the scan tool Driver Window Main Control Express Switch parameter is Active
• If not Active
1. Ignition OFF, disconnect the harness connector at the M74D window motor-driver, ignition ON.
2. Test for less than 1 V between the signal circuit 5 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the M74D window motor-driver.
• If Active
11. Test or replace the S79D window switch-driver.
Driver Or Passenger Window Switch Malfunction
1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.
2. Disconnect the harness connector at the S79D window switch-driver. Ignition ON
3. Verify the scan tool Passenger Window Switch at Door parameter is Inactive.
• If the value is UP
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger.
2. Test for infinite resistance between the signal circuit terminal 8 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74P window motor - passenger.
• If the value is Down
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger.
2. Test for infinite resistance between the signal circuit terminal 7 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the M74P window motor - passenger.
• If Inactive
4. Install a 3 A fused jumper wire between the signal circuit terminal 7 and the ground circuit terminal 1.
5. Verify the scan tool Passenger Window Switch at Door parameter is Down
• If Inactive
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger, ignition ON.
2. Test for less than 1 V between the signal circuit terminal 7 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the M74P window motor-passenger.
• If Down
6. Install a 3 A fused jumper wire between the signal circuit terminal 8 and ground circuit terminal 1.
7. Verify the scan tool Passenger Window Switch at Door parameter is Up
• If Inactive
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger, ignition ON.
2. Test for less than 1 V between the signal circuit terminal 8 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the M74P window motor-passenger.
• If Down
8. Test for greater than 10 V between the signal circuit terminal 6 and ground circuit terminal 1.
• If less than 10 V
1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance on the circuit.
• If less than 2 ohms, replace the M74P window motor-passenger.
• If greater than 10 V
9. Ignition OFF, connect the harness connector at the S79P window switch-passenger. Ignition ON
10. Verify the scan tool Passenger Window Switch at Door parameter changes between Inactive and Up, Express Up, Down, and Express Down when pressing and pulling the S79P window switch-passenger.
• If any parameter does not change
Test or replace the S79P window switch-passenger.
• If all the parameters change
11. Ignition OFF, connect the harness connector at the S79D window switch-driver. Ignition ON
12. Verify the scan tool Passenger Window Switch at Door parameter changes between Inactive and Up, Express Up, Down, and Express Down when pressing and pulling the appropriate switch on the S79D window switch-driver.
• If any parameter does not change
Test or replace the S79D window switch-driver.
• If all the parameters change
13. Test or replace the M74P window motor-passenger.
Component Testing
Driver Window Switch
1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. Test for infinite resistance between the terminals listed below with the switch in the open position:
* Ground terminal 1 and control terminal 3
* Ground terminal 1 and control terminal 3
* Ground terminal 1 and control terminal 5
* Ground terminal 1 and control terminal 6
* Ground terminal 1 and control terminal 7
* Ground terminal 1 and control terminal 8
• If less than infinite resistance
Replace the S79D window switch-driver.
• If infinite resistance
3. Test for less than 3 ohms between the terminals listed below with the switch in the Up position.
* Driver window - ground terminal 1 and control terminal 5
* Passenger window - ground terminal 1 and control terminal 8
• If 3 ohms or greater
Replace the S79D window switch-driver.
• If less than 3 ohms
4. Test for less than 3 ohms between the terminals listed below with the switch in the Down position:
* Driver window - ground terminal 1 and control terminal 3
* Passenger window - ground terminal 1 and control terminal 7
• If 3 ohms or greater
Replace the S79D window switch-driver.
• If less than 3 ohms
5. All OK
Passenger Window Switch
1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.
2. Test for infinite resistance between the terminals listed below with the switch in the open position:
* Ground terminal 1 and control terminal 6
* Ground terminal 1 and control terminal 7
* Ground terminal 1 and control terminal 8
• If less than infinite resistance
Replace the S79P window switch-passenger.
• If infinite resistance
3. Test for less than 3 ohms between the ground terminal 1 and the control terminal 8 with the switch in the Up position.
• If 3 ohms or greater
Replace the S79P window switch-passenger.
• If less than 3 ohms
4. Test for less than 3 ohms between the ground terminal 1 and the control terminal 7 with the switch in the Down position.
• If 3 ohms or greater
Replace the S79P window switch-passenger.
• If less than 3 ohms
5. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Front Side Door Window Switch Replacement Front Side Door Window Switch Replacement
* Front Side Door Window Regulator Motor Replacement Service and Repair