B1856

B1856 - Driver Window Control Circuit Open






For a complete wiring diagram, refer to.

• When Monitored: Whenever the window motor is operating.

• Set Condition: The left front window motor UP circuit does not change from high to low during a window movement command.






Test Step 1 - Test for an Intermittent Condition

• Turn the ignition ON.

• With the scan tool, erase all the DTCs.

• Try to operate the left front window up and down several times.

• Wait 30 seconds.

• With the scan tool, check for DTCs.

Does the scan tool display B1856 - Driver Window Control Circuit Open?

Yes

• Go to Test Step 2

No

• The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Window Motor or Circuit Open






• Turn the ignition OFF.

• Disconnect the driver express window motor connector.

• Connect a test lamp between the express UP circuit and the express DOWN circuit.

• Turn the ignition ON.

• Trip the driver door latch to the closed position.

• Operate the driver window switch up and down several times while observing the test lamp.

Does the test lamp illuminate brightly when the switch is pressed in both directions? With the express UP window, the test lamp may only flash momentarily.

Yes

• Replace the driver window motor.

• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 3

Test Step 3 - Driver Window Motor UP Circuit Open






• Turn the ignition OFF.

• Measure the resistance of the UP circuit between the motor harness connector and the driver door module C4 harness connector.

Is the resistance less than 10k ohms?

Yes

• Go to Test Step 4

No

• Repair the circuit for an open.

• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior

Test Step 4 - Driver Window Motor DOWN Circuit Open






• Measure the resistance of the DOWN circuit between the motor harness connector and the driver door module C4 harness connector.

Is the resistance less than 10k ohms?

Yes

• Replace the driver door module.

• Perform the Body Verification Test. Refer to=> Non-DTC Based Diagnostics. Body Interior

No

• Repair the circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior