Rear Left Power Window Motor Circuit Malfunction
What does B1102 mean?
The B1102 code means the vehicle's onboard diagnostic system has detected: Rear Left Power Window Motor Circuit Malfunction. This is a low severity code.
Common Symptoms
- Rear left window does not operate
- Rear left window stuck in position
- Grinding noise from rear left door when window switch pressed
- Window glass loose in door panel
- Rear window only works from driver master switch
Probable Causes (Ranked by Likelihood)
- Failed rear left window motor Very High
- Broken rear window regulator High
- Faulty rear left window switch Moderate
- Wiring fault in rear left door harness Low
Step-by-Step Diagnostic Procedure
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Test rear left window from driver and rear switches
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Check voltage at rear left window motor
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Listen for motor noise when switch activated
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Inspect regulator cables and tracks through door access
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Check door harness wiring at hinge area
Frequently Asked Questions
What is a window regulator?
The window regulator is the mechanical assembly inside the door that raises and lowers the window glass. It can be a cable-driven or scissor-type mechanism powered by the window motor.
Why does my window make a grinding noise?
Grinding noises typically indicate broken regulator cables wrapped around the motor pulley or damaged plastic guides in the window track. The regulator needs replacement.
Can I temporarily hold the window up?
As a temporary fix, you can place a block or wedge inside the door channel to hold the glass up. However, this should only be a short-term solution until the repair is completed.