B1935

Code

LAND ROVER B — Body

Passenger side airbag circuit low resistance or short circuit

Brand: LAND ROVER

Type: B — Body

Views: UK: 11 EN: 29 RU: 20

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Page language: EN

Causes

Short to ground in passenger airbag wiring
Short to battery/ignition feed in passenger airbag wiring
Damaged/chafed wiring harness or connector near passenger airbag module or dash
Corroded or water-damaged passenger airbag connector
Failed passenger airbag module (squib/inflator) with internal short
Faulty SRS (airbag) control module or connector

Symptoms

SRS/Airbag warning lamp illuminated on instrument panel
Passenger airbag disabled or passenger airbag status indicator shows "off"
Diagnostic trouble code B1935 present and repeatable on scan tool
Vehicle SRS system will not pass readiness checks

What to check

Use an OBD-II/SRS-capable scan tool to read and record all SRS codes and freeze-frame data
Visually inspect passenger airbag connector and nearby wiring for damage, corrosion, deformation or water ingress
Inspect wiring routing where it can be pinched (dash openings, brackets, seat mounts)
With SRS power disabled, measure resistance across the passenger airbag squib pins at the module connector
Check continuity from each squib pin to chassis ground and to battery positive to identify short to ground or supply
Inspect connectors at the SRS control module for corrosion, loose terminals or damaged pins

Signal parameters

Typical passenger airbag (squib) resistance: roughly 2–5 ohms (varies by manufacturer). Consult OEM spec for exact value
Low-resistance condition: values approaching 0 ohms indicate a short; any value significantly below OEM spec is a fault
Open circuit: infinite/OL reading indicates open wiring or disconnected module
Do not attempt to measure circuit voltage while the SRS system is armed — always disable SRS power per manufacturer before resistance tests

Diagnostic algorithm

Safety first — follow manufacturer SRS power-down procedures (disable battery/power and wait the specified time before touching SRS components)
Connect an SRS-capable scan tool; record B1935 and any related SRS or occupancy codes
Perform a visual inspection of passenger airbag connector and harness for chafing, pin damage, corrosion, or water stains
Disconnect the passenger airbag module connector (after SRS power disabled). Measure resistance across the squib terminals at the module connector and compare to OEM specification
If measured resistance is lower than spec (close to 0 Ω), check for short to chassis ground: measure continuity from each squib terminal to ground
Check for short to battery: measure continuity from squib terminals to battery positive/ignition feed (with power removed)
If wiring shows short/low resistance, trace harness back toward SRS module, looking for damage where harness bends, passes through bulkheads, or near mounting points; repair or replace damaged wiring/connector
If wiring and connectors test good but low resistance persists at module connector, replace the passenger airbag module per OEM procedure
If wiring and module are confirmed good, inspect SRS control module connectors and wiring. Replace control module only if diagnostics and OEM tests indicate module fault
After repairs, clear codes with scan tool, reconnect SRS power per procedure, and verify SRS lamp extinguishes and that the passenger airbag status behaves correctly

Likely causes

Wiring damage or chafed insulation where harness passes through dash or seat area
Corrosion or water ingress at the passenger airbag connector
Aftermarket repairs or improper connector seating at the passenger module
Failed passenger airbag inflator/squib presenting low resistance

Fault status

⚠️ Status

B1935 — Passenger side airbag circuit low resistance / short circuit detected. SRS control module reports a low-resistance condition in the passenger-side squib circuit.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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