OBD Guide
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B1770

Seat Driver Backward Circuit Open

B1770 is an OBD-II diagnostic trouble code meaning: Seat Driver Backward Circuit Open. Common causes: broken wires in the harness under the seat, seat adjustment switch malfunction. Estimated repair cost: $22–111.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • Driver's seat does not move backwards
  • Seat adjustment switch does not work
  • The malfunction indicator on the instrument panel lights up

Causes

  • Broken wires in the harness under the seat
  • Seat adjustment switch malfunction
  • Seat motor problems
  • Contact corrosion
  • Damaged fuse or relay

How to Fix

  1. Check fuses and relays associated with the seat adjustment system
  2. Inspect the wiring harness under the seat for damage.
  3. Check seat adjustment switch
  4. Check seat motor
  5. Clean and check contacts

Related codes

B1771B1772

FAQ

What does the B1770 code mean?

B1770 is an OBD-II diagnostic trouble code that indicates: Seat Driver Backward Circuit Open

What causes a B1770 error code?

The most common causes of B1770 include: Broken wires in the harness under the seat; Seat adjustment switch malfunction; Seat motor problems; Contact corrosion.

How do I fix a B1770 diagnostic trouble code?

To fix B1770: Check fuses and relays associated with the seat adjustment system. Inspect the wiring harness under the seat for damage.. Check seat adjustment switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1770?

Do not drive — repair immediately

How much does it cost to fix B1770?

The estimated repair cost for B1770 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat