C1704

Code

LAND ROVER C — Chassis

Right rear corner sensor failure

Brand: LAND ROVER

Type: C — Chassis

Views: UK: 21 EN: 128 RU: 27

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Page language: EN

Causes

Failed/right rear sensor element (wheel speed, height, or corner-specific sensor)
Damaged or corroded electrical connector at sensor
Broken/damaged wiring or short to power/ground in harness to right rear corner
Wheel bearing damage or missing tone ring/magnet on reluctor-type sensors
Faulty wheel hub/rotor reluctor (missing teeth, buildup of debris)
Loss of CAN/LIN communication or module internal fault

Symptoms

ABS, traction control, or stability control warning lamp illuminated
Reduced braking/traction control functionality or ABS disabled
Fault stored for right rear sensor (C1704)
Unusual brake feel or ABS activation where not expected
Possible suspension warning or reduced air suspension performance if sensor is height-related
Intermittent faults or lamp illuminated only during certain speeds/conditions

What to check

Read and record all stored codes and freeze frame data with a scan tool
Visual inspection of right rear sensor, connector, and wiring for damage, corrosion, chafing, or water ingress
Check sensor mounting and tone ring/target condition for missing teeth, heavy corrosion, or debris
Backprobing connector with ignition on to confirm reference voltage and ground (if applicable)
Check for related communications codes (CAN/LIN) that might affect sensor reporting
Wiggle-test wiring while monitoring live sensor data to reproduce fault

Signal parameters

Wheel speed (Hall-effect/active) sensors: reference supply typically 5 V (verify factory spec) and switching output between ~0.5–4.5 V; produces digital pulses with frequency proportional to wheel speed
Reluctor/inductive sensors: AC voltage output proportional to speed; little or no output at zero RPM; waveform amplitude increases with wheel speed
Typical open-circuit sensor resistance varies by type — consult OEM spec for exact ohms
Pulse count: number of pulses per wheel revolution depends on tone wheel; verify expected pulses per rev with scope or scan tool
CAN/LIN message: right rear wheel speed or corner sensor data should be present and update continuously at vehicle speed

Diagnostic algorithm

Connect full-function diagnostic scan tool, record current/standing codes and live data for right rear sensor. Note freeze frame and whether the signal shows pulses at speed.
Perform a visual inspection of the right rear sensor, connector, harness routing, and tone ring/target. Look for mechanical damage, contamination, or missing tone teeth.
With ignition ON (engine off), backprobe sensor connector: verify reference voltage and ground (if applicable) and check for proper resistance or expected quiescent voltage per OEM spec.
With road-wheel raised or during a wheel spin, monitor live wheel speed data or use an oscilloscope to confirm sensor waveform/pulses. Wiggle harness and connector to check for intermittent faults.
Check continuity between sensor connector and control module connector to rule out wiring opens/shorts. Repair any damaged wiring or corroded terminals.
Inspect wheel bearing and hub/tone ring condition; replace or repair if tone ring damaged or bearing axial/radial play is excessive.
If wiring and tone ring are good but sensor fails bench or live tests, replace the right rear sensor with OEM or equivalent part.
Clear codes, perform a road test and recheck live data and stored codes. If the fault returns, escalate to module testing/bench diagnostics or check for bus/communications faults.

Likely causes

Contaminated/damaged sensor or connector at the right rear wheel
Intermittent or broken wiring in harness to right rear corner
Failed sensor (most common)
Wheel bearing or tone ring damage
Module or bus communication fault (less common)

Fault status

⚠️ Status

Right rear corner sensor circuit fault or no valid signal detected — may disable ABS/traction/stability or affect suspension control.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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C1704 — Right rear corner sensor failure