B1856

B1856-DRIVER WINDOW MOTOR CONTROL CIRCUIT OPEN







- When Monitored:
Whenever the module is awake.

- Set Condition:
When one or both Driver Window Driver circuits (Up and Down) are not supplied with voltage, when they should be, during a window movement command for more than five ms., this code will set.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs
3. Try to operate the Driver Window up and down several times.
4. Wait 30 seconds.
5. With the scan tool, read DTCs.

Does the scan tool display B1856-DRIVER WINDOW MOTOR CONTROL CIRCUIT OPEN?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. WINDOW MOTOR OR CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Driver Window Motor connector.
3. Connect a test light between the (Q11) Driver Window Driver Up circuit and the (Q21) Driver Window Driver Down circuit
4. Turn the ignition on.
5. Trip the driver door latch to the closed position.
6. Operate the driver window switch up and down several times while observing the test light.

Does the test light illuminate brightly when the switch is pressed in both directions? With the express up window, the test light will only flash momentarily each time the switch is activated.

Yes

- Replace the Driver Window Motor (regulator).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (Q21) DRIVER WINDOW EXPRESS DOWN DRIVER CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Driver Door Module C4 connector.
3. Measure the resistance of the (Q21) Driver Window Down Driver circuit between the C4 module connector and the motor connector.

Is the resistance below 2.0 ohms?

No

- Repair the (Q21) Driver Window Down Driver circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 4

4. (Q11) DRIVER WINDOW DRIVER UP CIRCUIT OPEN




1. Measure the resistance of the (Q11) Driver Window Driver Up circuit between the C4 module connector and the motor connector.

Is the resistance below 2.0 ohms?

No

- Repair the (Q11) Driver Window Driver Up circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Replace the Driver Door Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.