B1741

Code

Other B — Body

Mirror Passenger Vertical Switch Circuit Failure

Brand: Other

Type: B — Body

Views: UK: 29 EN: 48 RU: 30

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown fuse or loss of power to mirror circuit
Open or shorted wiring between switch and mirror/mirror control module
Corroded or loose connector at switch or mirror
Faulty passenger mirror vertical switch (internal contact failure)
Failed mirror motor or position feedback potentiometer
Faulty body control module or mirror control module (less common)

Symptoms

Passenger mirror will not move up or down or moves intermittently
Mirror may move only in one direction or be unresponsive
One-touch or memory position for passenger mirror may not work
DTC stored in body/mirror control module
Possible other mirror-related communications/messages on dash (manufacturer-dependent)

What to check

Verify DTC stored and note freeze frame/occurrence history using scan tool
Check vehicle battery voltage and charging system (low voltage can cause faults)
Visually inspect passenger mirror and switch connectors for damage, corrosion, pin push-out, or water intrusion
Check related fuses and fusible links for continuity
Operate passenger mirror while observing for mechanical binding or resistance
If available, use scan tool to command passenger mirror vertical and watch for response/feedback

Signal parameters

Key-on battery voltage at mirror switch fuse: ~11–14 V (vehicle dependent)
Ground continuity at mirror switch ground: near 0 Ω to chassis ground
Actuation voltage when switch pressed: supply or switched ground present at switch output (typically close to battery voltage or ground)
Mirror motor coil resistance: typically 2–20 Ω per winding (varies by design)
Position sensor (potentiometer) output: variable voltage between 0–5 V when mirror moves (many systems use a potentiometer or Hall sensor)
Scan tool feedback: switch command present when actuated and mirror module reports position or fault (values vary by manufacturer)

Diagnostic algorithm

Retrieve and record code(s) and any freeze-frame data with a scan tool; clear code and reproduce to confirm
Visually inspect mirror assembly, switch, and related connectors for damage, corrosion or water ingress
Check and wiggle wiring harness from door to mirror while observing operation to look for intermittent opens
Verify fuse(s) related to power mirrors are good and supply voltage is present at the mirror switch fuse with key on
Backprobe the mirror switch connector and verify supply voltage and ground while operating the vertical switch; note whether the switch sends the expected signal (voltage or ground) to the mirror/mirror module
If no switch signal, remove and bench-test the switch for continuity or correct switching action; replace if faulty
If switch signals correctly, backprobe at the mirror connector; check for continuity between switch and mirror module and for correct actuation voltage at the mirror when the switch is used
Measure mirror motor coil resistance and, if equipped, check position sensor resistance/voltage while moving mirror by hand (power off)
If wiring is open or shorted, repair wiring and connectors (repair, solder, or replace harness as required) and protect against moisture
If wiring and switch are good but mirror motor or feedback sensor does not respond, remove mirror and bench-test or replace mirror motor/assembly
If module communication or internal module faults are suspected, consult manufacturer wiring diagrams and consider replacing the mirror control module or body control module only after isolating wiring/components
After repairs, clear codes and verify proper operation and that code does not return

Likely causes

Open or intermittent wire at mirror or switch connector
Corrosion or poor electrical contact at the passenger mirror switch connector
Failed mirror vertical motor or internal switch contacts
Blown fuse or poor power/ground connection

Fault status

⚠️ Status

Stored when the mirror control circuit for the passenger vertical (up/down) switch detects an open, short, or invalid signal. May be intermittent if wiring or connector is damaged; will return if underlying fault is not repaired.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours