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B317A




DTC B316B or B317A

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 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 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 (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, command the driver window UP, DOWN, express UP and express DOWN by using the S79D window switch-driver. The driver window should perform the UP, DOWN and express functions.

• If the driver window does not perform as specified, refer to Driver Window Malfunction.

2. Command the passenger window UP, DOWN, express UP and express DOWN by using the S79P window switch-passenger and the right front window switch on the S79D window switch-driver. The passenger window should perform the UP, DOWN and express functions from each switch.

• If the passenger window does not perform as specified, refer to Passenger Window Malfunction.

Circuit/System Testing

Driver Window Malfunction
1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. Ignition ON, verify the scan tool Driver Window Main Control Down Switch parameter is Inactive.

• If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the M74D window motor-driver.

3. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive.

• If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the M74D window motor-driver.

4. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive.

• If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the M74D window motor-driver

5. If all circuits test normal, test or replace the S79D window switch-driver.

Passenger Window 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.
3. Ignition ON, verify that the scan tool Passenger Window Switch at Door parameter is Inactive.

• If the value is Up, test the signal circuit terminal 8 for a short to ground. If the circuit tests normal, test or replace the M74P window motor-passenger.

• If the value is Down, test the signal circuit terminal 7 for a short to ground. If the circuit tests normal, test or replace the M74P window motor-passenger.

• If the value is Express, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, test or replace the M74P window motor-passenger.

4. Ignition OFF, connect the harness connector at the S79D window switch-driver.
5. Ignition ON, observe the scan tool Passenger Window Switch at Door parameter while using the right front window switch on the S79D window switch-driver. The parameters should change from Inactive to Up, Down and Express.

• If the values do not change, test or replace the S79D window switch-driver.

6. If all circuits test normal, replace the S79P window switch-passenger.

Component Testing

Driver Window Switch
1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. With the switch in the INACTIVE position, test for infinite resistance between the appropriate signal terminals listed below and the ground terminal 1:

* Terminal 2
* Terminal 3
* Terminal 5
* Terminal 6
* Terminal 7
* Terminal 8

• If less than the specified value, replace the S79D window switch-driver.

3. With the switch in the UP position, test for less than 2 ohm between the signal terminal listed below and the ground terminal 1:

* Terminal 5
* Terminal 8

• If greater than the specified range, replace the S79D window switch-driver.

4. With the switch in the DOWN position, test for less than 2 ohms between the signal terminal listed below and the ground terminal 1:

* Terminal 3
* Terminal 7

• If greater than the specified range, replace the S79D window switch-driver.

Passenger Window Switch
1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.
2. Test for infinite resistance between the signal terminals 6, 7 and 8 and the ground terminal 1 with the switch in the INACTIVE position.

• If less than the specified value, replace the S79P window switch-passenger

3. Test for less than 2 ohm between the signal terminal 8 and the ground terminal 1 with the switch in the UP position.

• If greater than the specified range, replace the S79P window switch-passenger.

4. Test for less than 2 ohm between the signal terminal 7 and the ground terminal 1 with the switch in the DOWN position.

• If greater than the specified range, replace the S79P window switch-passenger.

5. Test for less than 2 ohm between the signal terminal 6 and the ground terminal 1 with the switch in the EXPRESS DOWN position

• If greater than the specified range, replace the S79P window switch-passenger.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Front Side Door Window Switch Replacement (Front Side Door Window Switch Replacement)
* Front Side Door Window Regulator Motor Replacement (Front Side Door Window Regulator Motor Replacement)

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