POWER STEERING SYSTEM (for 2GR-FXE), Diagnostic DTC:C1562/27

DTC Code DTC Name
C1562/27 DC-DC Converter PIG Power Supply Voltage

DESCRIPTION

If an HV battery power supply malfunction signal from the power steering converter assembly is input to the power steering ECU, this DTC is stored and the power steering warning light illuminates.

DTC Code Detection Condition Trouble Area
C1562/27 Malfunction of power steering converter power supply from HV battery

  • Hybrid control system

  • Electric vehicle fuse

  • Power steering converter assembly

  • Harness or connector

WIRING DIAGRAM

A01FVPVE01

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the power steering converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Click here.

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

  • If the power steering ECU assembly is replaced a new one, perform assist map writing, clear the motor rotation angle sensor calibration value, initialize the motor rotation angle sensor value and calibrate the torque sensor zero point Click here.

Tech Tips

When measuring insulation resistance using a megohmmeter, set the megohmmeter to 500 V.

PROCEDURE


  1. CHECK DTC (HYBRID CONTROL SYSTEM)


    1. Check for DTCs in the hybrid control system Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    HYBRID CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  2. CHECK POWER STEERING CONVERTER WIRE

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Disconnect the q1 HV battery junction block connector.

    3. Disconnect the q2 power steering converter connector.

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

      Standard Resistance
      Tester Connector Switch Condition Specified Condition
      q1-1 (CBPE) - q2-1 (CBP) Power switch off Below 1 Ω
      q1-4 (CEPE) - q2-5 (CEP)

    5. Using a megohmmeter set to 500 V, measure the resistance according to the value(s) in the table below.

      Note

      Be sure to set the megohmmeter to 500 V when performing this test. Using a setting higher than 500 V can result in damage to the component being inspected.

      Standard Resistance
      Tester Connector Switch Condition Specified Condition
      q1-1 (CBPE) - Body ground Power switch off 30 MΩ or higher
      q1-4 (CEPE) - Body ground

    NG

    REPLACE POWER STEERING CONVERTER WIRE

    OK

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here