Code
C1117
LAND ROVER
C — Chassis
Direction control valve(s)
Views:
UK: 8
EN: 9
RU: 8
AI status
Completed
Completed
100%
Causes
- Open or shorted valve solenoid coil
- Poor or corroded electrical connector / wiring fault (open, short, high resistance)
- Failed direction control valve (mechanically stuck or internally leaking)
- Contaminated or degraded hydraulic fluid blocking valve operation
- Low hydraulic fluid level or system leak
- Faulty control module (ABS/traction/suspension ECU) or software issue
Symptoms
- ABS, DSC/traction control or suspension warning lamp illuminated
- Reduced or altered braking/traction control performance or changed steering feel
- Vehicle enters limp or degraded mode for stability/braking systems
- Unusual noises from hydraulic module (clicking, continuous pump operation)
- Visible hydraulic fluid leak or low reservoir level (depending on system)
What to check
- Read all stored codes and freeze-frame data with a compatible diagnostic tool; note related codes
- Visually inspect valve electrical connectors and wiring harness for corrosion, damage or pin push-out
- Check fuses and relays related to ABS/traction/suspension power circuits
- Inspect hydraulic fluid level and condition; look for contamination or metal particles
- Listen for valve/module noises while cycling system with a diagnostic tool
- Check for external hydraulic leaks around valve block and lines
Signal parameters
- Supply voltage to valve solenoid: battery voltage (~11–14 V) when circuit powered (verify with schematic)
- Solenoid coil resistance: typically in the low single-digit to low double-digit ohms (refer to vehicle service manual for exact value)
- Control signal type: usually a PWM or switched ground from the control module (duty cycle 0–100% depending on command)
- Expected current draw: varies by valve design—compare measured current to specification
- Continuity to ground and power: near zero ohms to ground when commanded, no open circuits
Diagnostic algorithm
- Connect a diagnostic scanner and record all ABS/traction/suspension fault codes and freeze-frame data.
- Clear codes, then perform a drive/actuation cycle or use the diagnostic tool to re-run self-tests and attempt to reproduce the code.
- Visually inspect connectors, harnesses, fuses and relays for the valve circuit; repair any physical damage.
- With ignition off, disconnect the valve connector and measure solenoid coil resistance; compare to factory spec.
- Check for power and ground at the valve connector with ignition on and while commanding the valve from the diagnostic tool; verify PWM signal if used.
- If electrical checks are good, inspect hydraulic fluid level/condition and filter; perform system bleeding if contamination or air is suspected.
- If valve is electrically correct but hydraulics fail, bench-test or replace the valve block/solenoid assembly and re-test system function.
- If a new valve does not clear the fault, test or replace the controlling module and re-check wiring integrity (pay attention to shared grounds and supply circuits).
- After repair, clear codes and perform a full system test and short road test to confirm the fault remains cleared.
Likely causes
- Corroded/loose connector or broken wire at the valve harness
- Valve solenoid failure (coil open or shorted) or valve mechanically seized
- Contaminated hydraulic fluid or internal valve contamination
- Intermittent power/ground to the valve caused by a fuse/relay or ground connection issue
Fault status
Status
Direction control valve(s) — electrical or hydraulic malfunction detected by control module.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
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Repair manuals for LAND ROVER
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
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Code
C1117
Other
C — Chassis
RPM Input Circuit Failure
Views:
UK: 16
EN: 20
RU: 17
AI status
Completed
Completed
100%
Causes
- Open or shorted valve solenoid coil
- Poor or corroded electrical connector / wiring fault (open, short, high resistance)
- Failed direction control valve (mechanically stuck or internally leaking)
- Contaminated or degraded hydraulic fluid blocking valve operation
- Low hydraulic fluid level or system leak
- Faulty control module (ABS/traction/suspension ECU) or software issue
Symptoms
- ABS, DSC/traction control or suspension warning lamp illuminated
- Reduced or altered braking/traction control performance or changed steering feel
- Vehicle enters limp or degraded mode for stability/braking systems
- Unusual noises from hydraulic module (clicking, continuous pump operation)
- Visible hydraulic fluid leak or low reservoir level (depending on system)
What to check
- Read all stored codes and freeze-frame data with a compatible diagnostic tool; note related codes
- Visually inspect valve electrical connectors and wiring harness for corrosion, damage or pin push-out
- Check fuses and relays related to ABS/traction/suspension power circuits
- Inspect hydraulic fluid level and condition; look for contamination or metal particles
- Listen for valve/module noises while cycling system with a diagnostic tool
- Check for external hydraulic leaks around valve block and lines
Signal parameters
- Supply voltage to valve solenoid: battery voltage (~11–14 V) when circuit powered (verify with schematic)
- Solenoid coil resistance: typically in the low single-digit to low double-digit ohms (refer to vehicle service manual for exact value)
- Control signal type: usually a PWM or switched ground from the control module (duty cycle 0–100% depending on command)
- Expected current draw: varies by valve design—compare measured current to specification
- Continuity to ground and power: near zero ohms to ground when commanded, no open circuits
Diagnostic algorithm
- Connect a diagnostic scanner and record all ABS/traction/suspension fault codes and freeze-frame data.
- Clear codes, then perform a drive/actuation cycle or use the diagnostic tool to re-run self-tests and attempt to reproduce the code.
- Visually inspect connectors, harnesses, fuses and relays for the valve circuit; repair any physical damage.
- With ignition off, disconnect the valve connector and measure solenoid coil resistance; compare to factory spec.
- Check for power and ground at the valve connector with ignition on and while commanding the valve from the diagnostic tool; verify PWM signal if used.
- If electrical checks are good, inspect hydraulic fluid level/condition and filter; perform system bleeding if contamination or air is suspected.
- If valve is electrically correct but hydraulics fail, bench-test or replace the valve block/solenoid assembly and re-test system function.
- If a new valve does not clear the fault, test or replace the controlling module and re-check wiring integrity (pay attention to shared grounds and supply circuits).
- After repair, clear codes and perform a full system test and short road test to confirm the fault remains cleared.
Likely causes
- Corroded/loose connector or broken wire at the valve harness
- Valve solenoid failure (coil open or shorted) or valve mechanically seized
- Contaminated hydraulic fluid or internal valve contamination
- Intermittent power/ground to the valve caused by a fuse/relay or ground connection issue
Fault status
Status
Direction control valve(s) — electrical or hydraulic malfunction detected by control module.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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