B1762

Code

Other B — Body

Seat Driver Front Down Circuit Open

Brand: Other

Type: B — Body

Views: UK: 31 EN: 35 RU: 29

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Page language: EN

Causes

Open or broken wiring in the front-down circuit (broken conductor, chafe, or damaged harness)
Disconnected, corroded, or poorly seated connector at the seat switch, motor or control module
Faulty seat position switch (front-down switch contacts open)
Failed front-down actuator/motor
Blown fuse or body control relay related to seat power
Faulty seat control module or BCM input driver

Symptoms

Driver seat will not move down at the front (no front-down motion)
Seat moves in other directions but not front-down
DTC B1762 stored; possible related seat or body codes
Intermittent operation when seat is moved or harness bent
Seat memory or comfort functions may not operate properly

What to check

Connect a scan tool; read and record B1762 and any other stored DTCs and freeze-frame data
Attempt the seat front-down operation while observing for noise, movement, or electrical response
Visually inspect seat wiring harness, especially through seat tracks, hinge areas, and connector boots
Check related fuses and relays for continuity and correct operation
Wiggle test harness and connectors while operating the seat to recreate fault or identify intermittent open
Back-probe connector pins to check for voltage and ground while operating the switch

Signal parameters

Expected supply voltage at seat switch/motor: ~12 V when commanded (battery voltage)
Control signal: continuity or switched battery to motor when switch commanded
Motor coil resistance: typically low ohms (example 1–10 Ω) — consult vehicle-specific spec
Open-circuit: infinite resistance between affected switch/motor terminals and module
Ground continuity: near 0 Ω between harness ground and chassis ground

Diagnostic algorithm

Retrieve codes and freeze-frame with a scan tool. Note if other seat or body codes are present.
Attempt the front-down operation while observing and listening for motor or relay activity. Note symptom behavior (dead, intermittent, partial).
Inspect fuses/relays powering the seat circuit; replace any blown fuses and retest.
Visually inspect connectors and the wiring harness from the seat switch to the motor and to the control module. Pay attention to the harness through the seat tracks and hinge area.
With ignition ON, back-probe the switch and motor connector pins. Command the front-down function and verify presence of battery voltage at the expected pin and a good ground return.
If no voltage is present at the motor when commanded, trace back toward the switch and module measuring for open circuits. If voltage is present at the motor connector but motor does not run, measure motor resistance and consider motor failure.
Check continuity (ignition OFF) between the switch, motor, and module pins. An open indicates wiring/connector or switch/motor internal open.
Wiggle the harness and seat while monitoring continuity/voltage to identify intermittent opens. Repair or replace damaged wiring or connector as required.
If wiring and connectors test good, bench-test or substitute a known-good switch or motor (or use an appropriate jumper) to isolate component failure.
If tests point to module/BCM driver fault, verify secondary systems and perform module-level tests per manufacturer procedures before replacing. Clear codes and perform final operation verification.

Likely causes

Damaged wiring or connector at the seat (most common on moving harnesses in seat track)
Defective seat position/switch assembly
Open/failed motor (wiring to motor open internally)
Connector corrosion or water intrusion
Control module input driver failure (less common)