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Home / DTC / C1D00 — Brake down switch parking Parking brake release switch release of parking brake

C1D00 — Brake down switch parking Parking brake release switch release of parking brake

Detailed page for trouble code C1D00.

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C1D00

LAND ROVER C — Chassis

Brake down switch parking Parking brake release switch release of parking brake

Brand: LAND ROVER
Type: C — Chassis
Views: UK: 4 EN: 9 RU: 2
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Page language: EN

Causes

  • Faulty parking brake release switch (sticking or failed contact)
  • Damaged wiring or chafed insulation in switch circuit
  • Corroded/loose connector at switch or control module
  • Seized/blocked mechanical parking brake or binding cables
  • Faulty EPB (electronic parking brake) motor or actuator
  • Blown fuse or poor ground for the parking brake circuit

Symptoms

  • Parking brake warning lamp or message illuminated
  • Unable to release the parking brake (vehicle remains in park/EPB engaged)
  • EPB will not operate from switch or from diagnostic tool
  • Intermittent release/engage behavior
  • Related ABS/traction/park interlock warnings or limp-home conditions

What to check

  • Scan for stored and pending DTCs; record freeze frame and live data
  • Visually inspect parking brake switch and wiring harness for damage, corrosion, and secure routing
  • Check connectors at the switch, EPB actuator and control module for corrosion and proper seating
  • Confirm fuse(s) for EPB/parking brake circuit are intact
  • Attempt to operate EPB using the ABS/EPB control unit via a diagnostic tool and observe behavior
  • Check for mechanical binding at calipers, cables or EPB actuator when commanded

Signal parameters

  • Switch expected states: OPEN when released / CLOSED when applied (or vice versa depending on vehicle) — should change state when parking brake is operated
  • Typical signal: low (~0 V) vs high (~12 V) or ground-referenced continuity when closed; confirm with vehicle-specific wiring diagram
  • Continuity: near 0 Ω when closed, open/infinite when open (confirm with connector unplugged)
  • Live-data: switch state should change within 1–2 seconds of command from module

Diagnostic algorithm

  1. Read and record all related codes and live data from EPB/ABS modules. Clear codes and re-run to reproduce.
  2. With ignition on, operate the physical parking brake switch while watching live-data for switch state change. Note mismatch.
  3. Visually inspect switch, connector, and wiring; repair any obvious damage or corrosion.
  4. Back-probe the switch connector and measure voltage/continuity while operating the switch. Compare to expected open/closed behavior.
  5. If wiring is intact, command EPB release using a diagnostic tool and monitor switch/actuator response and current draw on motor. High current or no movement suggests actuator/mechanical fault.
  6. Repair or replace defective component(s): clean/replace connector, repair wiring, replace switch or EPB actuator as indicated.
  7. After repair, clear codes and verify proper operation through multiple cycles and re-check for recurrence.

Likely causes

  • Release switch contacts failed or contaminated
  • Open or short in switch signal/ground wire
  • Connector corrosion at wheel arch or EPB unit
  • EPB actuator jam preventing switch from reaching expected position

Fault status

⚠️ Status
Parking brake release switch circuit fault — control module detects incorrect or missing release signal during release command.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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C1D01 C1D02 C1D03 C1D04
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