C1710 — Failure in the rear central sensor

Causes

• Failed rear central sensor (internal electronics or transducer)
• Open or short in sensor wiring harness
• Corroded, bent, or contaminated connector pins
• Water ingress or physical damage to sensor or bumper area
• Faulty ground or missing reference supply
• Intermittent connection due to chafing/connector movement

Symptoms

• Rear parking/park aid warning lamp or message on dash
• No rear centre sensor detection / reduced parking aid coverage
• Intermittent operation of rear sensors or constant beeping
• Related diagnostic trouble codes stored in ABS/parking aid module
• Inaccurate or out-of-range distance readings from rear centre zone

What to check

• Read stored DTCs and freeze frame data with an OEM-level scan tool
• Check for related codes in parking aid, ABS, or body control modules
• Visual inspection of the rear centre sensor, mounting and bumper for damage or debris
• Inspect connector for corrosion, bent pins, moisture or foreign material
• Back-probe connector: verify reference voltage present with ignition ON and ground continuity to chassis
• Use a multimeter/oscilloscope to verify the sensor signal while triggering the sensor (hand wave or object)

Signal parameters

• Reference supply: typically a stable 5 V reference (verify against vehicle data)
• Ground potential: ≈0 V; good chassis/ECU ground required
• Sensor output: pulsed/PWM or analog voltage that varies with target distance (should change when object placed near sensor)
• Continuity: sensor element/coil continuity expected (no open circuit)
• If available, check waveform on oscilloscope for consistent pulses and amplitude per factory specification

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