B1663

Code

Other B — Body

Seat Driver Front Up/Down Motor Stalled

Brand: Other

Type: B — Body

Views: UK: 30 EN: 32 RU: 26

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Mechanical obstruction in seat track or linkage (foreign object, bent track, worn gear)
Failed or worn seat motor (brushes, commutator, windings)
Faulty seat position switch or control input
Poor power or ground (blown fuse, corroded connector, broken wire)
Short or open in the motor circuit or high resistance connection
Seat control module or motor driver fault

Symptoms

Front of driver seat will not move up or down
Seat may try to move briefly then stop, or make grinding/straining noise
No movement despite switch input
Burning smell or smoke in severe overload cases
Related DTC(s) stored and possible seat system warnings on dash

What to check

Retrieve all stored codes and freeze-frame data with a scan tool
Visually inspect seat track, linkage and motor for obstructions or damage
Check fuses and seat system relays for continuity and correct value
Inspect connector pins for corrosion, bent pins or pushed-out terminals
Verify good ground at seat frame and chassis ground point
Operate the seat while watching/feeling for movement and listening for motor noise

Signal parameters

Supply voltage: ~12 V nominal at motor connector while switch is operated (vehicle off vs on depends on vehicle)
Ground continuity: near 0 Ω from connector ground to chassis ground
Motor winding DC resistance: typically low ohms (vehicle-specific) — expect single-digit ohms for many motors
Normal running current: typically a few amps; stall/overcurrent condition will show substantially higher current (use clamp ammeter)
PWM or driver voltage profile: some vehicles use switched or PWM drive — reference vehicle wiring diagram for expected waveform/frequency

Diagnostic algorithm

Connect scan tool, confirm B1663 and note any related codes and freeze-frame data. Clear codes and attempt to re-create the fault to confirm repeatability.
Visually inspect seat tracks, adjusters and motor area; remove any debris and check for bent components or seized bearings.
Check fuses and relays for the seat system; replace if blown or intermittently open.
With ignition on and a helper operating the switch, probe the motor connector: verify battery voltage on the supply pin when commanded and a good ground on return. Record readings.
If voltage is present but motor does not run, measure current to detect stall/overcurrent. Excessive current indicates motor stall or internal short.
Disconnect motor connector and check continuity/resistance of motor windings. Compare to vehicle-specific spec if available. If winding is open or shorted, motor likely defective.
Bench-test the motor by applying 12 V directly (use appropriate safety measures and a current-limited supply or in-line fuse) to confirm operation and note noise/vibration. Replace if it fails or draws excessive current.
If motor tests good, inspect wiring harness and switch for opens/shorts, intermittent connections, or damaged insulation. Wiggle-test connectors while monitoring voltage/current.
Inspect and test the seat position switch/controls and the seat control module outputs (logic/PWM) per vehicle wiring diagram. Replace faulty switch or module as indicated.
Repair or replace failed components (clear debris, realign tracks, replace motor, repair wiring, replace module/switch). Reassemble, clear codes and perform full functional test including multiple cycles and load conditions.
If DTC returns after repair, capture live data, compare to known-good values, and consider manufacturer-specific diagnostics or module programming.

Likely causes

Mechanical obstruction or binding in track
Failed/sticking motor (brush wear or internal short)
Poor electrical connection at motor connector or ground

Fault status

⚠️ Status

Stored when the driver front up/down seat motor is stalled or drawing excessive current while commanded; the seat control module has detected a motor fault or no movement.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours