Code
C2347
HYUNDAI
C — Chassis
Supply Valve - Electrical
Views:
UK: 19
EN: 22
RU: 17
AI status
Completed
Completed
100%
Causes
- Open or short in supply valve wiring (broken conductor, chafing, pinched harness)
- Corroded, loose, or damaged connector at the supply valve
- Failed supply valve (solenoid) internal coil or plunger
- Blown fuse or faulty relay providing power to the valve
- Poor or missing ground at the valve or ABS module
- Faulty ABS/traction control module or internal driver circuit
Symptoms
- ABS and/or traction control warning lamp illuminated
- ABS functionality reduced or disabled (pulsation not available during braking)
- Traction/stability control disabled or limited
- Brake pedal feel may be different during ABS events
- Stored DTC(s) related to supply valve electrical faults
- Intermittent faults or faults reappear after cleaning/inspecting connectors
What to check
- Scan tool: retrieve freeze frame data and all stored/related codes
- Visual inspection of valve connector and wiring for corrosion, damage, or water
- Check relevant fuses and relays for continuity and operation
- Backprobe valve connector to measure supply voltage and ground while commanding valve
- Measure coil resistance at valve connector (compare to spec if available)
- Wiggle test wiring while monitoring live data and code status
Signal parameters
- Supply voltage to valve: approx. battery voltage (11–14.5 V) when commanded
- Control signal: switched supply or pulse-width/duty driven by ABS module (0–12 V / PWM depending on system)
- Coil resistance (typical solenoid): commonly 5–30 ohms (refer to vehicle service spec)
- Ground continuity: near 0 ohms to chassis/ABS module ground
- No-open-circuit when commanded: expected current draw consistent with coil resistance
Diagnostic algorithm
- Connect a professional scan tool. Record trouble codes, freeze frame, and current live data. Clear codes and attempt to re-create.
- Visually inspect the supply valve connector and harness for corrosion, pushed-out pins, damage, or signs of water.
- Verify fuses and relays that supply the ABS/valve power. Replace any blown fuse and re-test.
- With key on (engine off) backprobe the valve connector. Command the valve ON from the scan tool and confirm battery voltage appears at the supply pin and a ground path is present.
- Measure the valve coil resistance with the connector disconnected. Compare to manufacturer specification. Infinite or very high resistance indicates open coil; near short indicates internal fault.
- Perform a wiggle test on the harness while observing live data and DTCs to find intermittent faults.
- Check ground integrity at module and chassis. Clean and tighten ground connections as needed.
- If wiring and power/ground are good but valve does not operate or resistance is out of spec, replace the supply valve (or test with known-good valve).
- If replacement valve still shows electrical fault and wiring checks good, suspect the ABS/ESP control module driver. Perform module-level diagnostics or consult manufacturer procedures before module replacement.
- After repairs, clear codes and road-test to confirm the fault does not return. Re-scan to ensure no related codes remain.
Likely causes
- Connector corrosion or water ingress causing intermittent circuit
- Open coil (infinite resistance) or shorted coil (low resistance) in the valve
- Supply voltage missing due to blown fuse or bad relay
- Open or high-resistance ground connection
- Wiring harness damaged by heat, abrasion, or previous repairs
- Defective ABS/ESP control module output stage
Fault status
Status
Supply valve — electrical fault detected (open/short/intermittent) in valve circuit. Service wiring, connector, valve, and ABS control module as required.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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