Code
C1716
LAND ROVER
C — Chassis
Failure in the right seat heater sensor - short circuit to ground
Views:
UK: 9
EN: 21
RU: 11
AI status
Completed
Completed
100%
Causes
- Seat temperature sensor element shorted internally to ground
- Damaged or chafed wiring harness shorting to chassis ground
- Corroded or loose connector at the sensor or seat heating control module
- Faulty seat heating control module or internal module wiring
- Aftermarket seat covers, repairs or previous work damaging sensor or wiring
Symptoms
- Right seat heater not working or stuck off
- Seat heater indicator for right seat may flash or show error
- Intermittent operation of right seat heater
- Possible stored fault code(s) and reduced functionality in HVAC menu
What to check
- Read stored and pending DTCs and freeze frame data with a capable scanner
- Visual inspection of right seat, under-seat wiring, and connector for damage or corrosion
- Backprobe seat temperature sensor connector and measure voltages with ignition on
- Measure resistance of the sensor and continuity of wiring to the seat heating module
- Disconnect sensor and confirm whether the fault clears or code changes
Signal parameters
- Reference supply to seat temp sensor: typically 5V reference (verify factory spec for vehicle)
- Sensor output voltage: typically in the ~0.5–4.5 V range depending on temperature (verify with service data)
- Typical thermistor resistance at ambient: commonly in the kilo-ohm range (e.g., ~2 kΩ–20 kΩ at 25°C) — consult vehicle-specific values
- Short to ground: very low resistance (close to 0 Ω) between sensor signal and chassis ground
- Open circuit: infinite or very high resistance (typically >50 kΩ) between sensor signal and module
Diagnostic algorithm
- Record codes and freeze frame, then note any related HVAC/seat codes.
- Disconnect battery ground if recommended by factory procedure before performing connector/wiring repairs.
- Visually inspect right seat, connectors, and wiring runs (under seat, through trim, into the sill) for damage, pinch points, or corrosion.
- With connector exposed and ignition on (follow safety procedures), backprobe the sensor connector and confirm reference voltage is present at the supply pin.
- Measure sensor output voltage to chassis ground. A voltage near 0V indicates a short to ground; compare to expected range in service data.
- With ignition off, measure resistance between the sensor signal pin and chassis ground. Very low resistance (
- Disconnect the sensor from the harness. Measure resistance between the harness signal and ground to determine if short is in harness/module (low) or in sensor (normal/high).
- If short is in harness, inspect wiring along its full route for chafes or contact with metal; repair or replace damaged sections and restore insulation or routing.
- If short is isolated to the sensor, replace the seat temperature sensor and re-test.
- If wiring and sensor check good, consider module fault. Verify module grounds and power; if still suspect, follow module bench or replacement procedures in factory manual.
- Clear codes and perform functional test and road/operational test to confirm repair.
Likely causes
- Connector pin pushed out, contacting seat frame ground
- Insulation worn through where harness passes over metal
- Water ingress or corrosion at the sensor connector
- Sensor failed due to age, heat or impact
- Module ground fault or internal short
Fault status
Status
Seat heating control module reports right seat temperature sensor short to ground. System may disable the right seat heater until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 0.5 - 1.5 hours
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