B2336 Mirror Switch Circuit Malfunction
The driver door module (DDM) or passenger door module (PDM) has detected a fault in the mirror switch assembly circuit. This indicates an open circuit, short to ground, or short to voltage in the mirror adjustment switch signal or reference lines, preventing the power mirror from operating.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty mirror switch (internal open or short circuit)
- Damaged wiring or loose connectors in the door harness (especially near the hinge area)
- Short to ground or battery voltage in the switch signal circuits
- Faulty door control module (DDM/PDM)
3. Symptoms You Will Notice
- Power mirror does not respond to switch inputs
- Mirror moves erratically or only in one direction
4. Step-by-Step Diagnosis
Check for technical service bulletins (TSBs) related to mirror switch issues
Inspect the mirror switch and door harness for visible damage, corrosion, or loose connections
Test the mirror switch circuits for continuity, shorts, and proper voltage using a multimeter
If wiring and switch test OK, suspect a faulty door control module and perform module diagnostics
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive, but you will lose power mirror adjustment. Manual adjustment may still be possible by pushing the mirror glass.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the switch, wiring, or module needs replacement.