B1035

Code

LAND ROVER B — Body

Left rear seat heating element

Brand: LAND ROVER

Type: B — Body

Views: UK: 18 EN: 24 RU: 20

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Page language: EN

Causes

Open circuit in the left rear seat heating element (broken heating wire)
Short to ground or short to battery in the seat heater wiring
Damaged/loose/corroded connector at the seat harness or control module
Water ingress or contamination of the seat cushion/heating pad
Blown fuse or faulty relay for seat heating circuit
Faulty seat module / climate/comfort control module or software fault

Symptoms

Left rear seat heater does not warm or heats intermittently
Seat heater indicator for left rear seat is off or shows error
Interior message/warning related to seat heating (depending on model)
Possible burning smell or localized overheating in rare short-circuit cases
Related occupant comfort functions (seat sensor/seat belt warnings) may show faults if seat module affected

What to check

Use a diagnostic scan tool to read B1035 and any other stored DTCs; record freeze-frame data and live data for the seat heater circuit
Confirm fuse(s) and related relays for seat heating are intact and correct rating
Visually inspect left rear seat area, connector(s), and wiring harness for damage, corrosion, water ingress, and chafing
With connector disconnected, check continuity/resistance of the heater element across its terminals
With seat heater commanded ON (using scan tool or switch), measure voltage supply and ground at the seat connector
Perform a wiggle test while monitoring live data to find intermittent wiring faults

Signal parameters

Supply voltage to seat heater when commanded: approx. battery voltage (≈11–14 V) — verify with vehicle battery voltage
Expected heater element resistance: low ohms (typical seat heater pads commonly fall in the roughly 0.5–10 Ω range) — consult Land Rover specification for exact value
Current draw when active: typically a few amps (varies by pad and vehicle); excessive current indicates short, very high/open resistance indicates broken element
Seat module may use PWM control to regulate heat; check for switched supply or switched ground output with scope or scan-tool live data

Diagnostic algorithm

Connect a capable scan tool and read all stored DTCs; note related codes and freeze-frame data. Clear codes and attempt to re-create.
Verify fuses/relays for seat heating circuit are correct and functional. Replace if faulty.
Perform visual inspection of left rear seat cushion, connectors, and harness for damage, corrosion, or contamination. Pay attention to seat belt buckle area and seat base routing.
Disconnect seat connector. Measure resistance across heater element terminals; compare to manufacturer spec. No continuity or very high resistance indicates an open element.
With seat connected and heater switch/command ON, measure voltage at the supply terminal and verify proper ground at the control terminal. If no supply, trace back to fuse/relay/wiring.
If supply voltage present but element has open circuit, access and replace the seat heating pad/element (seat cushion replacement or heater pad repair per service manual).
If element shows short to ground, isolate damaged wiring section using continuity/insulation testing and repair harness or replace pad as required.
If wiring and element check good but module output does not switch or shows erratic behavior, test/replace seat module or comfort control unit and program/configure as required by Land Rover procedures.
After repairs, erase codes and perform function test with scan tool; verify heater operation and that B1035 does not return. Perform road/test cycle if required to confirm reliability.

Likely causes

Open or high-resistance heating element in left rear seat (most common)
Damaged connector or wiring between seat and module (pin corrosion, broken wire)
Seat module output driver failure or internal short
Water damage to seat heating pad causing short to ground
Blown fuse protecting the heater circuit

Fault status

⚠️ Status

Seat heater circuit fault — left rear heating element circuit open/short detected. Heating function disabled for left rear seat until fault is resolved.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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B1035 — Left rear seat heating element