B1D74

Code

LAND ROVER B — Body

Shutdown Enable Switch of passenger airbag

Brand: LAND ROVER

Type: B — Body

Views: UK: 13 EN: 23 RU: 8

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Page language: EN

Causes

Faulty passenger airbag shutdown/enable switch (mechanical or electrical failure)
Open, short or high-resistance wiring between the switch and the SRS control module
Corroded or poorly connected connector(s) at the switch or SRS module
Water intrusion or physical damage to the switch or wiring harness
Faulty SRS (airbag) control module or related BCM/occupant detection module
Incorrect software/configuration or an ECU communication error

Symptoms

Passenger airbag status lamp shows disabled when it shouldn’t or fails to change state
Airbag or SRS warning lamp illuminated on the dash
Driver information message about passenger airbag status or switch fault
Inability to enable/disable passenger airbag using the switch
Intermittent or inconsistent passenger airbag operation

What to check

Read freeze frame and full SRS code set with a manufacturer-level scan tool; record any related codes
Verify instrument cluster and driver information messages for passenger airbag state
Visually inspect the passenger airbag switch, bezel and surrounding area for damage or moisture
Inspect connectors and wiring from the switch to the SRS module for corrosion, damage or loose pins
Check related fuses and ground points for continuity and corrosion
With a diagnostic tool, monitor live data/parameters for the passenger airbag enable state while operating the switch

Signal parameters

Switch expected to present a defined open/closed circuit to the SRS module (two-state contact) — continuity when actuated, open when opposite
Supply/reference commonly comes from the SRS module or fused ignition feed (nominally battery voltage when powered); switch returns to module as ground or signal circuit
Diagnostic tool should show passenger airbag enable = ‘ON’ or ‘OFF’ when toggling switch; CAN messages should update accordingly
Resistance: closed-contact near 0 ohms, open-contact high/OL (manufacturer-specific values apply)

Diagnostic algorithm

Obey all SRS safety procedures (disable battery per manufacturer instructions and wait required time before servicing components).
Use a capable scan tool to read DTCs and freeze frame data; note any additional SRS or communication codes. 2) Visually inspect the passenger airbag switch, surrounding trim and connector for damage, corrosion or evidence of water ingress. 3) Check related fuses and grounds for the SRS/switch circuit. 4) With ignition ON, monitor live data while operating the switch: confirm the enable/disable state changes and whether the SRS module registers the change. 5) Probe the switch connector (with harness connected unless manufacturer instructs otherwise) to confirm expected supply voltage and switch return signal when toggled; verify continuity through the switch when actuated. 6) If wiring or connector fault suspected, disconnect connector and perform continuity/resistance checks to the SRS module connector; repair any open circuits, shorts or high resistance. 7) If wiring and switch check good, perform module communication checks; consider reflashing or replacing the switch or SRS control module only after confirming fault location. 8) After repairs, clear codes, perform any required SRS system integrity checks/calibrations with a diagnostic tool, and recheck for DTC reappearance. 9) Restore vehicle and confirm proper passenger airbag status indication and that no SRS warning lamp remains active.
Note: Always follow manufacturer-specific procedures and use appropriate SRS diagnostic tools; if unsure, refer to dealer repair information.

Likely causes

Defective switch contacts or internal connector corrosion
Damaged wiring harness or chafed insulation causing intermittent short/ground
Connector pin corrosion at passenger door/cowl or under-dash switch location
Faulty occupant detection/passenger presence sensor affecting switch logic
SRS control module fault or intermittent CAN/bus communication

Fault status

⚠️ Status

Passenger airbag shutdown/enable switch circuit fault — inspect switch, wiring, connectors and SRS module communications.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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