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HOMESERVICE MANUALSHYUNDAI2009SONATA SE, 3.3 FREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLESC (ELECTRONIC STABILITY CONTROL) SYSTEMTROUBLESHOOTING FOR DTCC2308 FRONT-LH VALVE ERROR (INLET VALVE)DTC DETECTING CONDITION
2009 Hyundai Sonata SE, 3.3 F

C2308 Front-LH Valve error (Inlet Valve): DTC Detecting Condition

2009 Hyundai Sonata SE, 3.3 FSECTION DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSE

Item Detecting Condition Possible cause
DTC Strategy
  • Voltage monitoring
  • Faulty HECU
Case 1 Monitoring Period
  • Continuous
Enable Conditions
  • The electrical feedback signal does not match the actuation signal for the corresponding valve for more than 30ms.
    • Current controlled valves and under voltage conditions :detection time is 80ms
Case 2 Monitoring Period
  • Immediately after power on
  • every 20s
    • The Test is canceled if any control, valve actuation takes place or if the Vehicle is in motion and the BLS is on
Enable Conditions
  • A Fault is found if valve relay voltage is not within 0.1* battery voltage < valve relay voltage < 0.8*battery voltage when valve relay is switched off.
  • A Fault is found if valve relay voltage ≥ 0.2*battery voltage after that all valves are switched on sequential.
    • After that all valves are switched on sequential, valve relay voltage and valve feedback is measured.
Case3 Monitoring-Period
  • The Valve and Pump motor Test is performed once after ignition on if vehicle speed is >= 15 km/h.
Enable Conditions
  • The valve and pump motor test detects electrical actuation malfunction of ABS valves.

    The test actuates all valves in series (to detect short cuts or shunts between the valve lines). Faults are detected if there is an error during the test.
Case4 Monitoring-Period
  • The drift test executes only once during an ignition Cycle. The test is triggered if the following conditions are fulfilled : 10min after power up or end of control
    1. No BLS is applied
    2. Brake pressure is < 10bar
    3. Vehicle speed >15km/h
    4. Vehicle acceleration > 0.5m/s2
    5. Supply voltage > 11 volts.
Enable Conditions
  • The drift test is executed only once during an ignition Cycle.

    If it detects partly shorted valve coils, almost defective coils or malfunction of the valve driver, a failure is recognized.
Fail Safe
  • Valve cannot be actuated or valve is incorrectly actuated. This may result in locked wheels or wheels without pressure.
  • ABS/EBD/ESC function is prohibited.
  • ABS/EBD/ESC warning lamp is turned ON.
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