B1959

Code

Other B — Body

Seat Recline Forward/Backward Potentiometer Feedback Circuit Open

Brand: Other

Type: B — Body

Views: UK: 18 EN: 31 RU: 18

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Page language: EN

Broken or disconnected wiring between the potentiometer (recline sensor) and the control module
Corroded, bent or pushed-out connector pins at the seat or module connector
Failed potentiometer inside the seat recline mechanism
Poor ground or reference voltage to the potentiometer
Previous repair or seat removal with connector not reconnected properly

Seat will not automatically recline/return to memory or will not move to stored positions
Seat adjustment may stop mid-travel or not register position changes
Diagnostic trouble code B1959 stored and possibly other seat position-related codes
Memory seat functions may be inoperative or erratic

Retrieve codes and live data from the seat control or body control module to confirm B1959 and related PIDs
Visual inspection of seat harness, connectors and routing for damage, chafing or pinched wires
Back-probe the seat pot connector and module connector while operating the recline to observe signal behavior
Measure continuity between the potentiometer pins and the corresponding module pins with connectors disconnected
Measure reference voltage and ground presence at the pot connector

Potentiometer type: 3-wire variable-voltage sensor (reference, ground, wiper)
Reference voltage: typically ~5 V (may vary by manufacturer) present at pot reference pin with ignition ON
Wiper voltage: should vary smoothly within ~0.1–4.9 V (approx. 0–5 V range) as seat reclines/tilts
End-to-end resistance of pot: commonly 1 kΩ–10 kΩ (manufacturer-specific); open circuit shows OL or infinite ohms
Open-circuit condition: no wiper voltage change or no continuity to module pin

Record freeze-frame and live data for seat position sensor while operating the recline control to confirm open signal.
Perform a visual inspection of the seat base wiring harness, seat-to-body connectors, and module connector for damage, corrosion, or pin deformation.
Confirm reference voltage and ground at the potentiometer connector with ignition ON. If reference or ground is missing, trace and repair those circuits first.
Back-probe the wiper (signal) pin at the potentiometer connector and operate the recline motor. Observe whether the wiper voltage changes smoothly. If it is stuck at 0 V, OV, or no change → suspect open/failed pot or broken wire.
If no signal at pot but reference and ground present, disconnect connector and measure continuity between the pot pins and the corresponding module pins. An open indicates wiring/connector fault.
If wiring shows continuity, measure resistance across the pot terminals (end-to-end and wiper to ends) to verify internal potentiometer function. Infinite or out-of-spec values indicate a failed potentiometer.
Wiggle test harness and connectors while monitoring signal to find intermittent opens. Check for damage where harness flexes (seat tracks, under trim).
Repair damaged wiring or connectors, secure harness routing, or replace the seat recline potentiometer/seat track assembly as required.
Clear codes and verify correct operation by cycling recline through full travel and confirming a smooth changing wiper voltage and no return of B1959.

Open or intermittent harness conductor on the pot wiper or reference/ground circuit
Disconnected or damaged seat connector at the seat base
Failed recline angle potentiometer inside the seat track or motor assembly
Corrosion or bent pin at module connector causing open circuit

⚠️ Status

Seat recline potentiometer feedback circuit open. Seat position feedback not detected; memory/auto-recline functions may be disabled.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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