POWER STEERING SYSTEM(w/ Variable Flow Control Solenoid Valve), Diagnostic DTC:C15F0

DTC Code DTC Name
C15F0 VFC Solenoid Circuit

DESCRIPTION

This circuit supplies electric power to the variable flow control solenoid valve.

The power steering ECU controls the output current to the variable flow control solenoid valve in accordance with the steering angle signal, VGRS relative angle signal, steering zero point memory, vehicle speed signal and engine speed signal, adjusting the amount of power steering assist.

DTC Code DTC Detection Condition Trouble area
C15F0 A short or open in the solenoid valve circuit.

  • Harness or connector

  • Vane pump assembly

  • Power steering ECU assembly

WIRING DIAGRAM

A01X8N7E15
*a Variable Flow Control Solenoid Valve
*b Power Steering ECU

PROCEDURE


  1. READ VALUE USING GTS (SOLENOID CURRENT)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / PPS / Data List.

      PPS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Solenoid Current

      Solenoid Current/

      Min.: 0 mA

      Max.: 1000 mA

      		 200 to 950 mA The engine is running and the steering wheel is being turned.
      OK
      The normal condition value is displayed on the GTS.

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - VARIABLE FLOW CONTROL SOLENOID VALVE)


    1. Disconnect the E102 power steering ECU connector.

    2. Disconnect the C149 variable flow control solenoid valve connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E102-7 (SOF+) - C149-2 (SOF+) Always Below 1 Ω
      E102-8 (SOF-) - C149-1 (SOF-)
      E102-7 (SOF+) - Body ground Always 10 kΩ or higher
      E102-8 (SOF-) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT VARIABLE FLOW CONTROL SOLENOID VALVE

    A01XAS2E01
    Text in Illustration
    *a

    Component without harness connected

    (Variable Flow Control Solenoid Valve)

    1. Disconnect the C149 variable flow control solenoid valve connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (SOF-) - 2 (SOF+) 20°C (68°F) 6.7 to 7.3 Ω

    3. Connect the positive (+) lead of the battery with a 21 W bulb to terminal 2 (SOF+) and the negative (-) lead to terminal 1 (SOF-) of the solenoid valve connector. Then check that the valve moves and makes an operating noise.

      OK
      Valve moves and makes an operating noise.
      Result
      Result Proceed to
      OK A
      NG for 1UR-FE B
      for 3UR-FE C
      for 1VD-FTV D

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    B

    REPLACE VANE PUMP ASSEMBLY Click here

    C

    REPLACE VANE PUMP ASSEMBLY Click here

    D

    REPLACE VANE PUMP ASSEMBLY Click here