B1883

Code

LAND ROVER B — Body

Pre-tensioner of the right seat belt - short circuit to ground The passenger airbag deactivates the inoperative warning light

Brand: LAND ROVER

Type: B — Body

Views: UK: 11 EN: 23 RU: 21

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Page language: EN

Causes

Damaged/chafed wiring harness under or around the seat making contact with chassis ground
Corroded or contaminated pre-tensioner connector or mating module connector
Internal short in the pre-tensioner squib (pyrotechnic element)
Poor/incorrect repair after prior deployment (wiring not replaced/repaired to spec)
Faulty SRS/airbag control module or damaged module connector

Symptoms

SRS/airbag warning lamp illuminated
Passenger airbag may be automatically deactivated or show 'inoperative'
Seat belt pre-tensioner not armed or indicated as faulted
Possible audible warning chime or message on dash
Fault may be intermittent with seat movement

What to check

Read SRS codes and freeze frame data with a compatible scan tool; record DTC and any related codes
Visual inspection of right seat, seat rail area and wiring harness for damage, chafe, pinched wires or corrosion
Inspect and reseat the pre-tensioner connector; check for bent pins, corrosion or water ingress
Check SRS fuses and module connectors for secure fit and corrosion
Measure continuity/resistance of the pre-tensioner circuit and continuity to chassis ground with battery disconnected

Signal parameters

Typical intact pre-tensioner (squib) resistance: low ohms (commonly around 0.5–5 Ω) between the squib terminals — consult factory spec for exact value
No continuity (infinite/OL) between squib terminals and vehicle chassis ground on a healthy circuit
If short to ground: low resistance between squib terminal and chassis (close to 0 Ω)
With ignition on and module performing circuit checks, voltage across squib connector may be near battery voltage through internal resistors — refer to factory data for exact voltages

Diagnostic algorithm

Retrieve and record DTC(s) and freeze frame using a manufacturer-capable SRS scan tool. Note any related occupant detection or airbag codes.
Follow safety procedures: disable SRS power (disconnect battery) and wait the manufacturer-specified time for capacitors to discharge before working on the system.
Perform a visual inspection of the right seat area: look for damaged insulation, chafing at seat rails, connector contamination or aftermarket modifications.
Disconnect the pre-tensioner connector at the seat. Inspect pins for corrosion, bent/missing pins or debris. Clean or repair connector as required.
With battery disconnected, measure resistance between the pre-tensioner terminals. Compare to factory spec (expect low ohms). If resistance is very low to chassis ground, a short to ground exists.
With connector disconnected, measure resistance between each pre-tensioner terminal and chassis ground. Any continuity indicates a short to ground in wiring or device.
If wiring to the squib is suspect, perform a wiggle test: back-probe connectors and monitor live data or resistance while moving the seat through full travel to reproduce intermittent faults.
If wiring is damaged, trace and repair the harness replacing any chafed sections or connectors. Use manufacturer-approved repair methods for SRS circuits (service harness sections when required).
If wiring and connector check good, replace the pre-tensioner squib only with a correct OEM unit and clear codes following replacement.
After repairs, reconnect battery, perform SRS system initialization and re-scan. Verify no new codes and that passenger airbag status and warning lamp behave correctly.
If fault persists, inspect/replace SRS control module connectors or consult factory diagnostic flow for module testing; consider module replacement only after confirming circuit and device integrity.

Likely causes

Wiring chafe at seat rail or harness routing (most common)
Corroded/loose pre-tensioner connector at the seat
Failed pre-tensioner squib (internal short)
Faulty seat wiring related to aftermarket components (heaters, sensors)
Intermittent/poor connection at SRS control module

Fault status

⚠️ Status

SRS fault — Right seat belt pre-tensioner short to ground. Passenger airbag may be disabled and SRS warning lamp illuminated.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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