B2435

Code

LAND ROVER B — Body

Driver's seat belt circuit - resistance out of range

Brand: LAND ROVER

Type: B — Body

Views: UK: 9 EN: 18 RU: 10

AI status

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Page language: EN

Causes

Faulty/contaminated seat belt buckle switch or sensor
Broken, chafed or disconnected wiring in the seat harness (under seat)
Corroded or loose connector pins at the buckle, seat module or body control module
Water intrusion into the buckle or connector area
Faulty seat occupancy/seat module or body control module (intermittent or internal fault)
Aftermarket seat covers or debris preventing buckle contact

Symptoms

DTC stored (B2435) and possible related SRS/airbag or seatbelt warning light illuminated
Driver seat belt status read incorrectly on dash (shows unbuckled when buckled or vice versa)
Possible intermittent warning that changes with seat position or when buckling/unbuckling
In some vehicles, safety systems (airbag/pretensioner) may be disabled or flagged

What to check

Record freeze frame / stored data and clear the code to see if it returns
Visually inspect driver seat area, buckle and wiring for damage, corrosion, or foreign objects
Check connectors under the seat are fully seated and locking tabs intact
Check for water ingress or signs of corrosion in buckle and connectors
Confirm vehicle-specific SRS/airbag power-down and safety procedures before probing circuits

Signal parameters

Signal type: buckle switch — resistance (open/closed) or switched reference/ground depending on manufacturer
Typical expected behavior (generic): closed/latched ≈ low resistance (near 0–100 Ω); open/unlatched ≈ high resistance or open circuit (>5–10 kΩ or infinite) — manufacturer values may differ
Some systems use a pull-up to VBAT and report voltage; expect near VBAT when open and near 0 V when closed (confirm with factory data)
Check for stable reading; intermittent changes while wiggling harness suggest mechanical or connector issue

Diagnostic algorithm

Follow OEM SRS/airbag safety procedures (disable battery/ignition and wait specified time) before accessing buckle wiring
Read and record all stored SRS/seatbelt-related codes and freeze-frame data with a capable scan tool
Visually inspect buckle, wiring, and connectors for damage, corrosion, water or contamination; remove any debris or aftermarket covers
With connector disconnected, measure buckle switch resistance while operating latch; compare to expected (see signal_params)
Inspect continuity between buckle connector and seat module/BCM pins; check for shorts to ground or VBAT with multimeter
Wiggle test wiring and connectors while monitoring resistance/voltage to reproduce fault
If harness and buckle pass, inspect/replace seat module or body control module connector; confirm module power/ground and reference circuits
After repair or replacement, clear codes and perform relearn/coding procedures if required by manufacturer; verify code does not return

Likely causes

Damaged or contaminated buckle switch
Connector corrosion or poor pin contact under the seat
Wiring short or open between buckle and seat module
Faulty seat module or incorrect module coding

Fault status

⚠️ Status

B2435 — Driver seat belt circuit resistance out of range. Inspect buckle, wiring and seat/BCM modules.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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B2435 — Driver's seat belt circuit - resistance out of range