Service Information

Volt

DTC B316B, B317A, B318A, or B319A

Diagnostic Instructions

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

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

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

DTC B316B 00: Driver Window Switch

DTC B316B 02: Driver Window Switch Short to Ground

DTC B316B 39: Driver Window Switch Internal Electronic Failure

DTC B317A 02: Right Front/Passenger Window Switch Short to Ground

DTC B318A 02: Left Rear Window Switch Short to Ground

DTC B319A 02: Right Rear Window Switch Short to Ground

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Driver Window Motor Control	B316B 02	1	1	--
1. Driver Window Malfunction

Circuit/System Description

The body control module (BCM) monitors, receives and transmits serial data to each of the doors switches and window motors. When a window switch has been activated on the driver window switch, a signal is sent to the BCM which sends a signal to the appropriate window motor and the window motor will move in the direction commanded.

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

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

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Vehicle in Service Mode, command each window UP and DOWN by using each switch on the S79D window switch-driver and by using the S79P window switch-passenger, the S79LR window switch-left rear and the S79RR window switch-right rear. Each window should perform the UP and DOWN functions from each switch.

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

⇒	If the passenger window, left rear window or right rear window does not perform as specified, refer to Passenger/Rear Window Malfunction.

Circuit/System Testing

Driver Window Malfunction

Vehicle Off, disconnect the harness connector at the S79D window switch-driver.
Vehicle in Service Mode, 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.

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.

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.

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

Passenger/Rear Window Malfunction

Vehicle in Service Mode, verify that the scan tool 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, and Right Rear Window Main Control Up Switch parameters are inactive.

⇒	If any of the parameters are always Active, replace the S79D window switch-driver.

Verify that the scan tool Passenger Window Switch at Door parameter is Inactive.

⇒	If not the specified value, replace the S79P window switch-passenger.

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.

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.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Rear Side Door Window Switch Replacement

•	Front Side Door Window Switch Replacement

•	Front Side Door Window and Multifunction Switch Replacement

•	Front Side Door Window Regulator Motor Replacement