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Home / DTC / B1430 — Right rear - Seat climate control module - Control of fan motor speed 1

B1430 — Right rear - Seat climate control module - Control of fan motor speed 1

Detailed page for trouble code B1430.

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Code

B1430

LAND ROVER B — Body

Right rear - Seat climate control module - Control of fan motor speed 1

Brand: LAND ROVER
Type: B — Body
Views: UK: 6 EN: 9 RU: 15
AI status
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Page language: EN

Causes

  • Open, shorted or corroded wiring/connectors between the seat climate module and fan motor
  • Failed seat blower/fan motor (stuck, high resistance, internal short)
  • Faulty right-rear seat climate control module driver/output stage
  • Blown fuse or faulty relay supplying the seat climate module or motor
  • Water ingress or mechanical damage to the seat module or fan
  • Software/configuration error or lost communication between modules

Symptoms

  • Right rear seat blower does not operate on one or more speed settings
  • Blower runs only at full speed or only intermittently
  • Reduced or no seat heating/cooling airflow at the right rear seat
  • DTC stored in seat climate control module and possibly cabin HVAC module
  • Unusual noise from seat blower or burning/overheat odor in seat area

What to check

  • Read and record all stored DTCs and freeze frame data with a compatible scan tool; note any related HVAC or communication codes
  • Attempt to reproduce the symptom while monitoring live data for blower speed and module status
  • Visually inspect connectors and wiring for damage, contamination or water ingress at the right-rear seat area and module
  • Check fuses and relays supplying the seat climate module and blower motor
  • Backprobe the fan motor connector and the seat climate module harness to verify supply voltage and ground with ignition and HVAC on
  • Measure motor resistance and perform a bench power test on the blower motor to confirm operation

Signal parameters

  • Supply voltage to module and motor: approx. battery voltage (11–15 V when running)
  • Control signal: typically a PWM output from module; expected duty cycle 0–100% depending on commanded speed
  • PWM frequency (typical range): roughly 100–1000 Hz (manufacturer-specific)
  • Expected motor current: low-amp to mid-amp range depending on motor size; excessive current suggests seizure/short
  • Motor winding resistance: low ohm range (varies by motor); open circuit indicates motor failure

Diagnostic algorithm

  1. Connect a diagnostic tool and retrieve all DTCs and live data. Note freeze frame when fault set.
  2. Clear the code and attempt to reproduce. Confirm code returns to ensure fault is present.
  3. Visually inspect the right-rear seat area, connectors, and wiring for damage, corrosion, or water entry.
  4. Verify fuses/relays for seat climate and blower circuits. Replace any blown fuses and re-test.
  5. With ignition ON and HVAC commanded to operate, backprobe the fan motor connector: verify battery supply and a valid ground or PWM control signal from the module.
  6. If supply is present but no control signal, check module power/ground and communication lines (CAN) for proper operation.
  7. If control signal present but motor does not run, disconnect motor and perform a bench test with a regulated 12 V supply to confirm motor operation and current draw.
  8. If motor is defective, replace motor and retest. If motor OK but control output absent/abnormal, suspect module driver failure—verify by checking module outputs or swapping module where applicable.
  9. Inspect and repair any wiring faults found (shorts to battery/ground, open circuits, chafing). Use continuity and resistance checks, and repair/replace harness sections or connectors as needed.
  10. After repairs, clear codes, cycle HVAC functions and verify correct operation. Monitor for recurrence and consider module software update if recommended by manufacturer.

Likely causes

  • Damaged connector pins or corrosion at the rear seat fan connector
  • Blower motor bearings seized or internal short causing abnormal current draw
  • Output transistor in the seat climate module has failed (open or short)
  • Supply or ground missing at the seat climate control module
  • Intermittent wiring break (inside harness, chaffing, or connector)

Fault status

⚠️ Status
Right rear seat climate control — fan motor speed 1 circuit fault detected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1431 B1428 B1426 B1470 U0121
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