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Home / DTC / C1030 — Left Rear Vertical Acceleration Sensor

C1030 — Left Rear Vertical Acceleration Sensor

Detailed page for trouble code C1030.

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C1030

LAND ROVER C — Chassis

Left Rear Vertical Acceleration Sensor

Brand: LAND ROVER
Type: C — Chassis
AI status
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Page language: EN

Causes

  • Failed left rear vertical acceleration sensor (internal electronics)
  • Open, short or high resistance in sensor harness or connector
  • Corroded or damaged connector pins at sensor or module
  • Loss of sensor reference/power or ground
  • Faulty ABS/ESC control module or internal input circuit
  • Intermittent wiring fault caused by body movement or suspension travel

Symptoms

  • ABS/ESC warning lamp illuminated on instrument panel
  • Stability control, traction control or ABS functions degraded or disabled
  • Diagnostic trouble code C1030 stored (may be one of several related codes)
  • Possible drivability or braking behavior changes under extreme conditions
  • Intermittent faults that may appear after vehicle movement or wash

What to check

  • Read stored/active codes and freeze frame data with a diagnostic scanner
  • Inspect left rear sensor and connector for corrosion, water ingress, damage
  • Wiggle test wiring from sensor to module while monitoring fault and signal
  • Check for other related DTCs from ABS, airbag or body control modules
  • Measure sensor supply, ground and signal with multimeter or oscilloscope
  • Perform continuity/resistance check of harness between sensor and module

Signal parameters

  • Sensor typically provides an analog or digital acceleration output on a dedicated input — at rest output is near mid‑rail (approx. 2.5 V typical for many MEMS accelerometers) and shifts with vertical movement
  • Reference supply (sensor Vcc) typically ~5 V or vehicle sensor supply; ground must be solid
  • Signal should change smoothly with bumps; no intermittent drop-outs or shorts to battery or ground
  • CAN or LIN messaging (if sensor is module-based) should be present and error‑free on the bus
  • Expected signal update rate: tens to hundreds of Hz (use scope or scan tool to verify dynamic response)

Diagnostic algorithm

  1. Connect a full-function scan tool. Record C1030 and any additional DTCs, then clear codes and perform a short drive test to observe reappearance.
  2. Visually inspect left rear sensor, mounting and connector for damage, water ingress, corrosion or loose mounting hardware.
  3. With ignition ON (engine off), check for proper sensor supply voltage and ground at the sensor connector using a multimeter. Compare to manufacturer reference.
  4. Backprobe the sensor signal wire. With vehicle stationary and when applying a controlled vertical input (tap or jack slightly), observe signal change with oscilloscope or live data; look for stable mid‑rail resting voltage and dynamic response.
  5. Check continuity and resistance between sensor connector and the ABS/ESC module input pin(s). Inspect for short to power or ground.
  6. Wiggle test harness along its routing (suspension travel points) while watching live data or DTC status for intermittent faults.
  7. If wiring and power/ground are good but signal is out of range or absent, substitute a known good sensor (or swap with same-axis sensor if identical) to confirm sensor vs module fault.
  8. If swapped sensor clears the fault, replace the faulty sensor and re-test. If fault follows wiring or remains, inspect/repair harness or consider module repair/reprogramming per manufacturer procedures.
  9. After repair, clear codes and perform final road test and verification of ABS/ESC function.
  10. If diagnosis points to control module, consult manufacturer service information for internal circuit tests, module reprogramming, or replacement.

Likely causes

  • Moisture/corrosion at sensor connector on left rear hub or body harness
  • Broken or chafed wiring where harness flexes with suspension
  • Sensor failed due to impact or contamination
  • Poor ground at chassis/ABS module
  • Control module input damaged by short to voltage

Fault status

⚠️ Status
Stored fault: left rear vertical acceleration sensor circuit or sensor fault detected. May disable or reduce ABS/ESC functionality until repaired.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

C1027 C1028 C1029 C1031 C1100
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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