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Home / DTC / C1712 — Left Front Damper Actuator Open Circuit

C1712 — Left Front Damper Actuator Open Circuit

Detailed page for trouble code C1712.

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Code

C1712

HUMMER C — Chassis

Left Front Damper Actuator Open Circuit

Brand: HUMMER
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken or disconnected wiring in the left front damper circuit
  • Corroded or loose connector at the damper actuator or control module
  • Failed damper actuator (internal open coil or connector)
  • Blown fuse or faulty relay supplying the suspension damper circuit
  • Poor or missing ground for the suspension control/actuator circuit
  • Internal fault in the suspension control module or related ECU/software fault

Symptoms

  • Suspension warning lamp or message displayed
  • Left front corner of vehicle stuck at one ride height or not adjusting
  • Harsh or soft ride on left front wheel; uneven ride height
  • Reduced vehicle stability or traction control events related to suspension
  • Fault stored in suspension control module; possible limp or limited suspension operation

What to check

  • Read DTCs and freeze frame with a capable scan tool; note any related codes
  • Retrieve live data: commanded damper position, actual position/feedback, actuator current and voltage while commanding dampers
  • Visually inspect left front damper actuator, connector, and wiring harness for damage or corrosion
  • Check relevant fuses and relays for the suspension/actuator circuit
  • Perform wiggle test on harness and connector while monitoring live data or watching for intermittent faults
  • Measure continuity and resistance between actuator connector and suspension control module pins with connectors disconnected

Signal parameters

  • Actuator supply voltage (nominal ~12 V)
  • Actuator ground continuity (ohms to chassis ground)
  • Actuator coil/resistance (ohms)
  • Actuator command signal (percentage, counts or PWM duty as reported by module)
  • Actuator feedback/position sensor value (volts or counts)
  • Actuator current draw (amps) when commanded

Diagnostic algorithm

  1. Connect a professional scan tool; record all suspension-related DTCs and freeze frame data.
  2. Verify vehicle is on level surface and safe to work on. Disable any automatic raising systems per service manual before disconnecting components.
  3. Visually inspect LF damper connector and wiring for damage, corrosion, pin push-out or water intrusion; repair or reseal as needed.
  4. Check and verify relevant fuses/relays for the suspension system; replace if blown.
  5. With connector attached, monitor live data while commanding the LF damper (if tool allows). Note if command is sent and whether feedback/position or current changes.
  6. If no response, turn ignition OFF and disconnect the actuator connector. Measure continuity/resistance between actuator connector pins and the suspension control module connector pins. Compare to service spec; an open or infinite reading indicates a wiring open — trace and repair.
  7. With ignition ON and connector disconnected, verify supply voltage and ground at the actuator connector when the system is commanded. If no power or ground, inspect upstream wiring, fuses, relays and module outputs.
  8. If wiring and power/ground are good, bench-test the actuator with proper test voltage per service manual. If actuator does not operate or has open resistance, replace actuator.
  9. After repair or replacement, clear codes, cycle ignition and re-test actuator operation through scan tool. Perform a road or static operational test to confirm proper function and verify the code does not return.
  10. If wiring and actuator test good but code remains, suspect the suspension control module output or internal fault; consult service manual for module tests, update software, or consider module replacement following further diagnostics.

Likely causes

  • Open or broken conductor in harness to left front damper
  • Seized/corroded actuator connector pins or water intrusion at connector
  • Failed actuator motor or position sensor (internal open)
  • Blown fuse feeding actuator power
  • Detached or corroded ground at chassis or module

Fault status

⚠️ Status
Left Front Damper Actuator Open Circuit — service suspension system
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5 - 3.0 hours

Similar codes

C1710 C1711 C1713 C1720 C1722
Repair manuals

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Code

C1712

LAND ROVER C — Chassis

Failure in the left seat heater sensor - short circuit to the battery / disconnected

Brand: LAND ROVER
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken or disconnected wiring in the left front damper circuit
  • Corroded or loose connector at the damper actuator or control module
  • Failed damper actuator (internal open coil or connector)
  • Blown fuse or faulty relay supplying the suspension damper circuit
  • Poor or missing ground for the suspension control/actuator circuit
  • Internal fault in the suspension control module or related ECU/software fault

Symptoms

  • Suspension warning lamp or message displayed
  • Left front corner of vehicle stuck at one ride height or not adjusting
  • Harsh or soft ride on left front wheel; uneven ride height
  • Reduced vehicle stability or traction control events related to suspension
  • Fault stored in suspension control module; possible limp or limited suspension operation

What to check

  • Read DTCs and freeze frame with a capable scan tool; note any related codes
  • Retrieve live data: commanded damper position, actual position/feedback, actuator current and voltage while commanding dampers
  • Visually inspect left front damper actuator, connector, and wiring harness for damage or corrosion
  • Check relevant fuses and relays for the suspension/actuator circuit
  • Perform wiggle test on harness and connector while monitoring live data or watching for intermittent faults
  • Measure continuity and resistance between actuator connector and suspension control module pins with connectors disconnected

Signal parameters

  • Actuator supply voltage (nominal ~12 V)
  • Actuator ground continuity (ohms to chassis ground)
  • Actuator coil/resistance (ohms)
  • Actuator command signal (percentage, counts or PWM duty as reported by module)
  • Actuator feedback/position sensor value (volts or counts)
  • Actuator current draw (amps) when commanded

Diagnostic algorithm

  1. Connect a professional scan tool; record all suspension-related DTCs and freeze frame data.
  2. Verify vehicle is on level surface and safe to work on. Disable any automatic raising systems per service manual before disconnecting components.
  3. Visually inspect LF damper connector and wiring for damage, corrosion, pin push-out or water intrusion; repair or reseal as needed.
  4. Check and verify relevant fuses/relays for the suspension system; replace if blown.
  5. With connector attached, monitor live data while commanding the LF damper (if tool allows). Note if command is sent and whether feedback/position or current changes.
  6. If no response, turn ignition OFF and disconnect the actuator connector. Measure continuity/resistance between actuator connector pins and the suspension control module connector pins. Compare to service spec; an open or infinite reading indicates a wiring open — trace and repair.
  7. With ignition ON and connector disconnected, verify supply voltage and ground at the actuator connector when the system is commanded. If no power or ground, inspect upstream wiring, fuses, relays and module outputs.
  8. If wiring and power/ground are good, bench-test the actuator with proper test voltage per service manual. If actuator does not operate or has open resistance, replace actuator.
  9. After repair or replacement, clear codes, cycle ignition and re-test actuator operation through scan tool. Perform a road or static operational test to confirm proper function and verify the code does not return.
  10. If wiring and actuator test good but code remains, suspect the suspension control module output or internal fault; consult service manual for module tests, update software, or consider module replacement following further diagnostics.

Likely causes

  • Open or broken conductor in harness to left front damper
  • Seized/corroded actuator connector pins or water intrusion at connector
  • Failed actuator motor or position sensor (internal open)
  • Blown fuse feeding actuator power
  • Detached or corroded ground at chassis or module

Fault status

⚠️ Status
Left Front Damper Actuator Open Circuit — service suspension system
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5 - 3.0 hours

Similar codes

C1710 C1711 C1713 C1720 C1722
325

Browse 325 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

C1712

Other C — Chassis

Left Front Sensor Circuit Failure

Brand: Other
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Broken or disconnected wiring in the left front damper circuit
  • Corroded or loose connector at the damper actuator or control module
  • Failed damper actuator (internal open coil or connector)
  • Blown fuse or faulty relay supplying the suspension damper circuit
  • Poor or missing ground for the suspension control/actuator circuit
  • Internal fault in the suspension control module or related ECU/software fault

Symptoms

  • Suspension warning lamp or message displayed
  • Left front corner of vehicle stuck at one ride height or not adjusting
  • Harsh or soft ride on left front wheel; uneven ride height
  • Reduced vehicle stability or traction control events related to suspension
  • Fault stored in suspension control module; possible limp or limited suspension operation

What to check

  • Read DTCs and freeze frame with a capable scan tool; note any related codes
  • Retrieve live data: commanded damper position, actual position/feedback, actuator current and voltage while commanding dampers
  • Visually inspect left front damper actuator, connector, and wiring harness for damage or corrosion
  • Check relevant fuses and relays for the suspension/actuator circuit
  • Perform wiggle test on harness and connector while monitoring live data or watching for intermittent faults
  • Measure continuity and resistance between actuator connector and suspension control module pins with connectors disconnected

Signal parameters

  • Actuator supply voltage (nominal ~12 V)
  • Actuator ground continuity (ohms to chassis ground)
  • Actuator coil/resistance (ohms)
  • Actuator command signal (percentage, counts or PWM duty as reported by module)
  • Actuator feedback/position sensor value (volts or counts)
  • Actuator current draw (amps) when commanded

Diagnostic algorithm

  1. Connect a professional scan tool; record all suspension-related DTCs and freeze frame data.
  2. Verify vehicle is on level surface and safe to work on. Disable any automatic raising systems per service manual before disconnecting components.
  3. Visually inspect LF damper connector and wiring for damage, corrosion, pin push-out or water intrusion; repair or reseal as needed.
  4. Check and verify relevant fuses/relays for the suspension system; replace if blown.
  5. With connector attached, monitor live data while commanding the LF damper (if tool allows). Note if command is sent and whether feedback/position or current changes.
  6. If no response, turn ignition OFF and disconnect the actuator connector. Measure continuity/resistance between actuator connector pins and the suspension control module connector pins. Compare to service spec; an open or infinite reading indicates a wiring open — trace and repair.
  7. With ignition ON and connector disconnected, verify supply voltage and ground at the actuator connector when the system is commanded. If no power or ground, inspect upstream wiring, fuses, relays and module outputs.
  8. If wiring and power/ground are good, bench-test the actuator with proper test voltage per service manual. If actuator does not operate or has open resistance, replace actuator.
  9. After repair or replacement, clear codes, cycle ignition and re-test actuator operation through scan tool. Perform a road or static operational test to confirm proper function and verify the code does not return.
  10. If wiring and actuator test good but code remains, suspect the suspension control module output or internal fault; consult service manual for module tests, update software, or consider module replacement following further diagnostics.

Likely causes

  • Open or broken conductor in harness to left front damper
  • Seized/corroded actuator connector pins or water intrusion at connector
  • Failed actuator motor or position sensor (internal open)
  • Blown fuse feeding actuator power
  • Detached or corroded ground at chassis or module

Fault status

⚠️ Status
Left Front Damper Actuator Open Circuit — service suspension system
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5 - 3.0 hours

Similar codes

C1710 C1711 C1713 C1720 C1722
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