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Home / DTC / B1670 — Passenger side external mirror horizontal engine jam

B1670 — Passenger side external mirror horizontal engine jam

Detailed page for trouble code B1670.

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Code

B1670

LAND ROVER B — Body

Passenger side external mirror horizontal engine jam

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Foreign object or ice blocking mirror movement
  • Mechanical binding inside mirror gearbox or linkage
  • Worn or seized motor bearings or brushes
  • Broken or bent mirror linkage or gears
  • Corroded/loose connector or wiring fault to the motor
  • Faulty mirror control switch or body control module (BCM) output

Symptoms

  • Passenger mirror will not move left/right when commanded
  • Clicking, grinding, or no sound from the mirror when attempting horizontal movement
  • Mirror may move slowly or stop mid-travel
  • DTC B1670 stored in body/BCM scan tool
  • Possibly erratic operation or erratic mirror position feedback if equipped with position sensor

What to check

  • Visually inspect mirror for external obstruction (ice, debris) and physical damage
  • Operate mirror while listening at the mirror for motor noise or grinding
  • Check fuse(s) related to mirror circuit(s) and replace if blown
  • Inspect mirror connector for corrosion, bent pins, water ingress or loose terminals
  • Attempt manual movement of mirror glass (if serviceable) to check for binding
  • Scan BCM or body module for stored mirror-related faults and freeze/frame data

Signal parameters

  • Expected supply voltage at motor connector when commanded: approx. 11–14 V (battery voltage) on the driven pin and near 0 V on the return (polarity reverses for opposite direction)
  • Motor coil resistance (typical): low ohms — often 1–20 Ω (verify specific spec in OEM data)
  • Idle/uncommanded: no supply voltage (open or high impedance) at motor connector
  • If mirror has position feedback potentiometer: nominal potentiometer value typically in the kΩ range and should vary smoothly across travel
  • Motor current draw while turning: can be 0.5–5 A depending on motor and load; abnormally high current indicates mechanical jam

Diagnostic algorithm

  1. Record freeze frame and any related mirror DTCs with a scan tool.
  2. Visually inspect mirror, housing, and glass for external obstructions, ice, or impact damage; clear any obstruction and retest.
  3. Operate the mirror control while an assistant observes and listens at the mirror: note if motor operates, stalls, clicks, or is silent.
  4. Check fuses and relays for the mirror circuit; replace or repair as required.
  5. Disconnect mirror electrical connector and inspect pins for corrosion, damage, or water. Repair connector and harness as needed.
  6. With connector disconnected, measure motor coil resistance across the horizontal motor terminals and compare to OEM spec. Very high/infinite = open/sprung winding; near 0 = shorted.
  7. Reconnect and back-probe motor connector. Command horizontal movement and measure supply voltage/polarity at the motor pins: battery voltage should appear on one pin and ground on the other (reverses direction). No or low voltage indicates control/supply issue.
  8. If correct voltage is present but motor does not turn, suspect internal motor or gearbox seizure — remove mirror assembly for bench test or replacement.
  9. If no voltage at motor when commanded, trace wiring back to BCM/switch: test continuity to module and verify switch operation (measure voltage at switch/mirror switch connector while commanding).
  10. If wiring and switch are good, check BCM outputs and grounds. Replace or reprogram BCM only after confirming upstream wiring/switch and that BCM is issuing correct output.
  11. After repair, clear DTCs and perform full function test of mirror horizontal movement; verify no recurrence of B1670.

Likely causes

  • Obstruction or physical damage to mirror glass/assembly preventing travel
  • Worn/seized horizontal adjustment motor or gearbox
  • Connector corrosion or intermittent wiring causing insufficient voltage/current

Fault status

⚠️ Status
Passenger side external mirror horizontal motor jam detected — mirror horizontal movement blocked or motor stalled.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B1671 B1672 B1673 B1674 B1675
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

B1670

Other B — Body

Mirror Passenger Right/Left Motor Stalled

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Foreign object or ice blocking mirror movement
  • Mechanical binding inside mirror gearbox or linkage
  • Worn or seized motor bearings or brushes
  • Broken or bent mirror linkage or gears
  • Corroded/loose connector or wiring fault to the motor
  • Faulty mirror control switch or body control module (BCM) output

Symptoms

  • Passenger mirror will not move left/right when commanded
  • Clicking, grinding, or no sound from the mirror when attempting horizontal movement
  • Mirror may move slowly or stop mid-travel
  • DTC B1670 stored in body/BCM scan tool
  • Possibly erratic operation or erratic mirror position feedback if equipped with position sensor

What to check

  • Visually inspect mirror for external obstruction (ice, debris) and physical damage
  • Operate mirror while listening at the mirror for motor noise or grinding
  • Check fuse(s) related to mirror circuit(s) and replace if blown
  • Inspect mirror connector for corrosion, bent pins, water ingress or loose terminals
  • Attempt manual movement of mirror glass (if serviceable) to check for binding
  • Scan BCM or body module for stored mirror-related faults and freeze/frame data

Signal parameters

  • Expected supply voltage at motor connector when commanded: approx. 11–14 V (battery voltage) on the driven pin and near 0 V on the return (polarity reverses for opposite direction)
  • Motor coil resistance (typical): low ohms — often 1–20 Ω (verify specific spec in OEM data)
  • Idle/uncommanded: no supply voltage (open or high impedance) at motor connector
  • If mirror has position feedback potentiometer: nominal potentiometer value typically in the kΩ range and should vary smoothly across travel
  • Motor current draw while turning: can be 0.5–5 A depending on motor and load; abnormally high current indicates mechanical jam

Diagnostic algorithm

  1. Record freeze frame and any related mirror DTCs with a scan tool.
  2. Visually inspect mirror, housing, and glass for external obstructions, ice, or impact damage; clear any obstruction and retest.
  3. Operate the mirror control while an assistant observes and listens at the mirror: note if motor operates, stalls, clicks, or is silent.
  4. Check fuses and relays for the mirror circuit; replace or repair as required.
  5. Disconnect mirror electrical connector and inspect pins for corrosion, damage, or water. Repair connector and harness as needed.
  6. With connector disconnected, measure motor coil resistance across the horizontal motor terminals and compare to OEM spec. Very high/infinite = open/sprung winding; near 0 = shorted.
  7. Reconnect and back-probe motor connector. Command horizontal movement and measure supply voltage/polarity at the motor pins: battery voltage should appear on one pin and ground on the other (reverses direction). No or low voltage indicates control/supply issue.
  8. If correct voltage is present but motor does not turn, suspect internal motor or gearbox seizure — remove mirror assembly for bench test or replacement.
  9. If no voltage at motor when commanded, trace wiring back to BCM/switch: test continuity to module and verify switch operation (measure voltage at switch/mirror switch connector while commanding).
  10. If wiring and switch are good, check BCM outputs and grounds. Replace or reprogram BCM only after confirming upstream wiring/switch and that BCM is issuing correct output.
  11. After repair, clear DTCs and perform full function test of mirror horizontal movement; verify no recurrence of B1670.

Likely causes

  • Obstruction or physical damage to mirror glass/assembly preventing travel
  • Worn/seized horizontal adjustment motor or gearbox
  • Connector corrosion or intermittent wiring causing insufficient voltage/current

Fault status

⚠️ Status
Passenger side external mirror horizontal motor jam detected — mirror horizontal movement blocked or motor stalled.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B1671 B1672 B1673 B1674 B1675
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