B1927

B1927 - Left Rear Window Control Circuit Low






For a complete wiring diagram, refer to.

• When Monitored: Whenever the window motor is operating.

• Set Condition: The left rear window driver UP circuit does not change from LOW to HIGH after one second.






Test Step 1 - Test for an Intermittent Condition

• Turn the ignition ON.

• With the scan tool, erase all DTCs.

• Try to operate the left rear window UP and DOWN several times.

• Wait 30 seconds.

• With the scan tool, check for DTCs.

Does the scan tool display B1927 - Left Rear Window Control Circuit Low?

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 Short






• With the scan tool, erase DTCs.

• Turn the ignition OFF.

• Disconnect the left rear window motor connector.

• Turn the ignition ON.

• Operate the left rear window switch UP and DOWN several times.

• With the scan tool, check for DTCs.

Does the scan tool display B1927 - Left Rear Window Control Circuit Low?

No

• Replace the left rear window motor.

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

Yes

• Go to Test Step 3

Test Step 3 - Left Rear Window Driver UP Circuit Short to Ground






• Turn the ignition OFF.

• Disconnect the left rear door module C1 harness connector.

• Measure the resistance between ground and the left rear window driver UP circuit.

Is the resistance more than 10k ohms?

Yes

• Go to Test Step 4

No

• Repair the left rear window driver UP circuit for a short to ground.

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

Test Step 4 - Left Rear Window Driver DOWN Circuit Short to Ground






• Measure the resistance between ground and the left rear window driver DOWN circuit.

Is the resistance more than 10k ohms?

Yes

• Replace the left rear door module.

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

No

• Repair the left rear window driver DOWN circuit for a short to ground.

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