Passenger Mirror Vertical Position Switch Circuit Fault
The B1741 code indicates a fault in the passenger side mirror vertical position switch circuit. The seat or mirror control module detects an abnormal electrical condition—such as a short circuit, open circuit, or resistance out of range—in the circuit controlling the mirror's vertical movement. This prevents or disrupts the power adjustment of the mirror's vertical position.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty mirror control switch with internal failure in the vertical circuit contacts
- Loose, corroded, disconnected, or damaged wiring or connectors between the switch and mirror motor
- Short to ground or battery voltage in the passenger mirror vertical switch circuit
- Open circuit in the vertical position switch wiring
- Passenger mirror vertical adjustment motor with abnormal internal resistance or mechanical/electrical failure
3. Symptoms You Will Notice
- Passenger side mirror does not adjust vertically
- Mirror moves erratically or only in one direction
4. Step-by-Step Diagnosis
Check for technical service bulletins (TSBs) related to the mirror system
Inspect the mirror control switch for proper operation and continuity
Test the wiring and connectors between the switch and mirror motor for shorts, opens, or corrosion
Measure resistance and voltage at the mirror motor connector to verify motor condition
If all else is normal, replace the mirror control switch or motor as needed
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is safe to drive. The fault only affects the passenger mirror's vertical adjustment, which is a convenience feature and does not impact vehicle safety.
How much does it cost to fix?▼
Repair costs typically range from $100 to $300, depending on whether the switch or motor needs replacement and labor rates.