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Home / DTC / C1426 — Right rear shock absorber - short circuit to ground

C1426 — Right rear shock absorber - short circuit to ground

Detailed page for trouble code C1426.

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Code

C1426

LAND ROVER C — Chassis

Right rear shock absorber - short circuit to ground

Brand: LAND ROVER
Type: C — Chassis
Views: UK: 7 EN: 11 RU: 5
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Page language: EN

Causes

  • Damaged or chafed wiring harness to right rear shock absorber
  • Corroded or loose connector at the shock absorber
  • Internal short in the shock absorber actuator
  • Water ingress or corrosion in connector or actuator
  • Shorted pin or terminal in a junction or grounding point
  • Faulty suspension control module or driver transistor (less common)

Symptoms

  • Suspension warning light or message on instrument panel
  • Reduced or no damping control at the right rear wheel (noticeable ride change)
  • Vehicle may enter limp/backup suspension mode or disable adaptive damping
  • Related drivability or handling feel degraded over bumps
  • Stored chassis/suspension fault codes

What to check

  • Read and record stored DTCs and freeze frame data with a capable scan tool
  • Visual inspection of right rear shock wiring, connector, and protective loom for damage or corrosion
  • Check for moisture, corrosion or bent pins in the shock absorber connector
  • Measure resistance between the actuator pins and chassis ground with connector disconnected
  • Perform a continuity test from the module/connector pin to chassis ground to confirm short
  • Backprobe connector while activating suspension (with appropriate safety) to observe control signals/voltage

Signal parameters

  • Control module output: switched/PWM voltage when commanding damper (typically 0–12 V depending on design) — should not be shorted to ground
  • Actuator resistance: should be within manufacturer specification (not near 0 Ω which indicates a short, and not open/infinite) — consult factory manual for exact value
  • Continuity: no direct short (near 0 Ω) between the actuator positive/control pin and chassis ground with connector disconnected
  • Connector pin voltage: expected change when system commands actuator (observe with scan tool/oscilloscope)

Diagnostic algorithm

  1. Retrieve and record all stored codes and any related codes with a scan tool; note freeze frame and live data.
  2. Visually inspect the right rear shock harness, connector, and nearby routing for abrasion, pinch points, or water entry. Repair obvious damage.
  3. Disconnect the right rear shock absorber connector. Inspect pins for corrosion, bent pins, or contamination. Clean or replace connector as required.
  4. With the connector disconnected, measure resistance between actuator pins and chassis ground. A near 0 Ω reading indicates a short to ground in the actuator or harness; an open/very high reading may indicate an open circuit.
  5. Perform a continuity check from the suspension control module pin (or harness splice) to chassis ground to confirm where the short is located.
  6. If harness appears intact, test the actuator directly per manufacturer procedure (measure coil resistance, bench test if allowed). Replace actuator if it shows internal short.
  7. If short is in the harness, trace and repair damaged wiring, replace connector or sections of loom. Use proper insulation and routing to avoid repeat damage.
  8. If wiring and actuator check good, test driver output at the control module. If module output is shorted internally, consult manufacturer procedures for module repair or replacement.
  9. After repair, clear codes and perform a road test and active tests with a scan tool to confirm proper operation and that the code does not return.
  10. Re-inspect repairs after road test and verify no water entry or rubbing points remain.

Likely causes

  • Wiring abrasion or chafing causing the conductor to contact chassis ground
  • Corroded/contaminated connector at the right rear shock causing low-resistance path to ground
  • Failed internal actuator coil or electronics producing a direct short to ground

Fault status

⚠️ Status
Right rear shock absorber circuit short to ground detected by suspension control module. Damping control may be disabled for the right rear wheel; repair wiring or replace faulty actuator as required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0 - 2.5 hours

Similar codes

C1423 C1424 C1425 U0121 U0415
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