Code
C1412
MITSUBISHI
C — Chassis
Solenoid disconnection
Views:
UK: 14
EN: 18
RU: 15
AI status
Completed
Completed
100%
Causes
- Open or disconnected harness connector at the solenoid
- Broken or chafed wiring (open circuit)
- Corroded or bent terminals in connector
- Failed solenoid coil (internal open)
- Blown fuse or faulty relay supplying the solenoid circuit
- Poor or missing ground at solenoid or ECU
Symptoms
- Related warning lamp illuminated (ABS, AWD, TCS, or transmission warning)
- Related system function disabled or degraded (ABS/TCS/transfer case shift issues)
- No solenoid operation when commanded via diagnostic tool
- Intermittent fault or loss of function under vibration
- Stored diagnostic trouble code C1412 (and possibly related codes)
What to check
- Read and record all stored codes and freeze frame data with a scan tool
- Visually inspect solenoid, connector, and wiring harness for damage, corrosion or disconnection
- Check related fuses and relays for continuity and proper operation
- Back-probe solenoid connector while commanding the solenoid with a scan tool and observe voltage/duty
- Measure solenoid coil resistance at the connector with the harness disconnected and compare to spec
- Perform continuity check from solenoid connector to the control module pin (check for open or short to ground/power)
Signal parameters
- Typical resting/command voltage: near battery voltage (~11–14 V) on power feed; switched/grounded or PWM on control line when commanded
- Expected coil resistance: commonly in the range of ~5–100 ohms depending on solenoid type (consult vehicle service spec)
- Current draw when energized: often 0.2–3 A depending on coil and duty cycle
- Control signal when commanded: either switched ground/power or PWM duty (frequency commonly tens to a few hundred Hz)
- Symptoms of open: infinite resistance (OL) or very high resistance at the coil; no voltage change on command at the solenoid connector
Diagnostic algorithm
- Connect a capable OBD-II/scan tool, read and record all codes and live data. Note any related codes.
- Visually inspect the solenoid connector, harness, and mounting for physical damage, corrosion, or contamination. Ensure connector is fully seated.
- Check related fuses and relays; replace if faulty.
- With ignition ON (engine off), measure voltage at the solenoid power terminal; verify battery voltage present if applicable.
- Disconnect harness at solenoid and measure coil resistance between solenoid terminals. Compare to OEM specification. Infinite/open = failed coil or open wiring.
- Back-probe the connector and command the solenoid ON using the scan tool; observe voltage or PWM at the control terminal. If command present but solenoid does not actuate, suspect solenoid failure.
- If no command present at control terminal, trace continuity from the control module to the solenoid connector. Check for opens/shorts to ground or power and repair wiring as needed.
- Inspect and test ground circuits related to the solenoid and ECU. Clean and tighten grounds.
- If wiring and connector are good but problem persists, test/replace the solenoid. If replacement solenoid also fails, consider ECU driver fault and follow manufacturer procedures to test/replace module.
- After repair, clear codes, perform functional tests and a road/operational test to confirm fault does not return.
Likely causes
- Disconnected or pushed-out connector at the solenoid
- Wire broken at flex point or behind connector (pinched/abraded)
- Terminal corrosion causing high resistance or open circuit
- Solenoid coil failed open
- Related fuse or relay not providing power
- Damaged ECU output stage
Fault status
Status
Solenoid circuit disconnected — open/poor connection detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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