Code
C2317
HYUNDAI
C — Chassis
Front Right(FR) Valve (In) - Abnormal
Views:
UK: 13
EN: 22
RU: 18
AI status
Completed
Completed
100%
Causes
- Damaged or corroded connector at FR valve/hydraulic unit
- Open or short in wiring between ABS modulator and ABS/ESC control module
- Failed inlet (IN) solenoid/valve in the front right channel
- Hydraulic contamination or internal valve seizure in modulator
- Low battery or poor power/ground to ABS module
- Faulty ABS/ESC control module
Symptoms
- ABS warning lamp and/or ESC/Traction Control lamp illuminated
- Reduced or disabled ABS/ESC functionality (stability/traction assist may be unavailable)
- Possible ABS pump activation or unexpected braking intervention
- Brake pedal pulsation during ABS events or unusual brake feel
- Diagnostic trouble codes stored for ABS/ESC valve circuits
What to check
- Read DTC(s) and freeze frame data with a full-feature scan tool; record related ABS/ESC codes
- Check battery voltage and main fuses/relays for ABS power supply
- Visual inspection of ABS hydraulic unit connector and wiring for corrosion, damage, or water ingress
- Backprobe connector while commanding valve ON/OFF from scan tool to observe voltage/response
- Measure solenoid coil resistance at the valve connector and compare to service manual specs
- Check continuity between valve connector and ABS control module pins; check for shorts to ground/power
Signal parameters
- Solenoid coil resistance: measure at valve connector (check exact spec in service manual)
- Command voltage to solenoid when activated: approx. battery voltage or PWM duty as commanded by module
- Duty cycle or PWM frequency when valve is modulated (0–100% duty as commanded by ECU)
- Current draw of solenoid when energized (compare to spec)
- CAN/Circuit communication status between ABS hydraulic unit and control module
Diagnostic algorithm
- Safety first: Park vehicle on level surface, chock wheels, disable ignition and follow manufacturer safety procedures.
- Connect a professional scan tool, read and record all ABS/ESC codes and freeze frame data. Note whether code is current or historic.
- Clear codes, perform a road test to attempt to re-create the fault (if safe), then re-scan to confirm code persistence.
- Visually inspect the ABS hydraulic unit and harness at the front right valve connector for damage, corrosion, water intrusion, or loose terminals.
- With ignition ON (engine off), backprobe the FR valve connector. Command the valve ON/OFF from the scan tool while monitoring voltage and waveform. Confirm a change in commanded duty or voltage and listen for valve operation.
- Measure coil resistance at the FR valve connector. If resistance is open/infinite or significantly out of spec, suspect a failed solenoid.
- Perform continuity checks from the valve connector to the ABS control module pins. Check for shorts to battery positive and ground. Wiggle harness during tests to reveal intermittent faults.
- Verify proper power and ground at the ABS module and check related fuses/relays. Inspect module grounds for corrosion and tightness.
- If wiring and connector are good but the valve does not operate or resistance is out of spec, replace the defective inlet solenoid or the hydraulic modulator assembly per service procedure.
- If the valve and hydraulic unit are replaced, or repairs made, clear DTCs, perform ABS actuator tests, then road test to confirm the fault is cleared and ABS/ESC operation is normal.
- If wiring, power, and valve are confirmed good but code persists, consider replacement or bench testing of the ABS control/modulator unit and consult manufacturer service information.
Likely causes
- Poor electrical connection/corroded connector at the FR valve
- Open, short to power, or short to ground in the valve harness
- FR inlet solenoid coil failed (high/low resistance or open)
- Valve stuck or contaminated inside hydraulic unit
- ABS hydraulic modulator or control module fault
Fault status
Status
Front Right inlet valve — abnormal signal or operation detected by ABS/ESC control module; possible electrical fault, solenoid failure, or hydraulic valve malfunction.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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