C1180

Code

Other C — Chassis

Park Brake Valve Solenoid #1 Sense Input Circuit Failure

Brand: Other

Type: C — Chassis

Views: UK: 35 EN: 38 RU: 42

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or shorted sense wiring between the solenoid and the control module
Corroded, loose or damaged connector at the solenoid or module
Failed park brake valve solenoid (coil or internal sensing)
Blown fuse or faulty relay supplying the solenoid circuit
Poor ground or battery voltage issues
Faulty ABS/EPB/vehicle control module or internal input circuit fault

Symptoms

Park brake warning lamp or ABS/EPB warning on instrument cluster
Electric parking brake may not engage or release, or operates intermittently
Diagnostic trouble code C1180 stored in control module
Possible reduced braking functionality or parking brake stuck
Clicking or abnormal noises from brake assembly when commanded

What to check

Retrieve freeze frame and stored data with a scan tool; note when fault sets and related codes
Visually inspect wiring and connectors at the park brake valve solenoid and control module for corrosion, bent pins, damage or water intrusion
Check related fuses and relays for continuity and correct operation
Backprobe the solenoid connector and monitor voltage/signal with key ON and when commanding the solenoid via scan tool
Measure coil resistance with connector disconnected and compare to vehicle specification
Wiggle wiring harness while monitoring live data to detect intermittent opens/shorts

Signal parameters

Reference/command voltage: typically battery voltage when commanded (vehicle-specific); may be switched/pulsed by module
Sense signal: should change state when solenoid is commanded (voltage present vs. absent); exact voltage levels are manufacturer-specific
Coil resistance: typical solenoid coils commonly fall within ~5–40 ohms (check vehicle spec) — open or very high resistance indicates open circuit; near zero indicates short
Current draw when activated: expected to rise to specified coil current (use clamp meter or in-line ammeter if needed)
Intermittency: signal should be steady when commanded; rapid fluctuations indicate wiring or connector issues

Diagnostic algorithm

Confirm the code and note any accompanying codes; clear the code and attempt to re-create condition while monitoring live data.
Visually inspect harness and connector at the park brake valve solenoid #1 for damage, corrosion, bent pins, water intrusion and secure mating.
Check fuses and relays that supply the solenoid circuit; verify battery voltage at the fuse with key ON.
With connector disconnected, measure coil resistance between the solenoid’s power and ground terminals and compare to spec; an open or shorted coil indicates solenoid replacement.
Backprobe the sense/feedback wire at the solenoid connector. With key ON and with the module commanding the solenoid, observe voltage or signal change using a multimeter or oscilloscope. Compare to expected behavior.
Perform a wiggle test on the harness while monitoring the sense input for intermittent faults. Repair any chafed or damaged wiring.
Check continuity between the solenoid connector and the control module pin to identify open or short to power/ground. Repair wiring as needed.
Verify module grounds and battery voltage under load; low voltage can cause false sense faults.
If wiring and solenoid check OK, test by commanding the solenoid while monitoring current draw. Excessive or no current suggests solenoid or driver fault.
If all circuits test normal but fault persists, consider a faulty control module; confirm with module diagnostics and manufacturer guidance before replacement.
After repairs, clear codes and perform functional test/road test to ensure proper operation and that code does not return.