POWER STEERING SYSTEM, Diagnostic DTC:C1552

DTC Code DTC Name
C1552 PIG Power Supply Voltage Malfunction

DESCRIPTION

The power steering converter assembly boosts the PIG power supply battery voltage from 12 V to approximately 46 V. This voltage is then supplied to the power steering ECU to operate the motors. As a fail-safe function, when the PIG power supply and power steering converter assembly are malfunctioning, power assistance stops.

DTC No. DTC Detection Condition Trouble Area
C1552 PIG power supply voltage malfunction

  • Wire harness

  • Power steering converter assembly

  • Power steering ECU

WIRING DIAGRAM

A001EBIE02
*a Power Steering Converter Assembly
*b Battery
*c Power Steering ECU

PROCEDURE


  1. CHECK CONNECTORS


    1. Check the connection of the power steering ECU connector.

    2. Visually inspect the terminals of the power steering ECU connector.

      Result
      Result Proceed to
      Normal A
      Connectors not properly connected B
      Power steering ECU connector terminals abnormal C

      Note

      If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    B

    CONNECT CONNECTORS CORRECTLY

    C

    REPLACE POWER STEERING ECU Click here

    A

  2. CHECK POWER STEERING ECU (PIG TERMINAL)


    1. A001CIME02
      *1 Front view of wire harness connector: (to Power Steering ECU)

      Disconnect the A44 ECU connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A44-4 (PIG) - Body ground Engine switch on (IG) 30 to 48 V

      Note

      If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    OK

    REPLACE POWER STEERING ECU Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (CONVERTER - BATTERY AND ECU)


    1. A001F7DE02
      *1 Front view of wire harness connector: (to Power Steering Converter Assembly)

      Disconnect the A47 converter connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A47-1 (PIG) - Body ground Engine switch on (IG) 11 to 14 V
    3. A001DV8E01
      *1 Front view of wire harness connector: (to Power Steering Converter Assembly)
      *2 (to Power Steering ECU)

      Disconnect the A44 ECU connector.

    4. Disconnect the A46 converter connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A44-4 (PIG) - A46-4 (VOT1) Always Below 1 Ω
      A44-5 (PGND) - Body ground Always Below 1 Ω
      A44-4 (PIG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (CONVERTER - BATTERY)


    1. A0019T5E02
      *1 Front view of wire harness connector: (to Power Steering Converter Assembly)

      Disconnect the A46 converter connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A46-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    OK

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR