ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A2/22

DTC Code DTC Name
C13A2/22 Engine / Power Switch Malfunction

DESCRIPTION

When the power switch is turned on (IG), power is supplied to the parking brake ECU assembly. This DTC is stored if the IG power source is not input to the parking brake ECU assembly when communication with other ECUs occurs.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A2/22 Engine / Power Switch Malfunction

Both of the following conditions are met:


  1. Power switch on (IG)

  2. When the hybrid vehicle control ECU communicates with the main body ECU (multiplex network body ECU) via CAN communication, IG power supply is not received for approx. 3 seconds.

  • Wire harness or connector

  • IG power source circuit

  • Parking brake ECU assembly

 Yes An electric parking brake system malfunction is displayed on the multi-information display.

WIRING DIAGRAM

B002IQTE05

CAUTION / NOTICE / HINT

Note


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

  • Before disconnecting connectors or fuses, turn the power switch off and wait 20 seconds or more.

  • When replacing the parking brake ECU assembly, operate the electric parking brake switch (integration control and panel assembly), as the parking brake indicator light (red) blinks when the power switch is first turned on (IG).

PROCEDURE


  1. READ VALUE USING GTS (IG STATUS / IG SWITCH)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG) and the GTS on.

    4. Enter the following menus: Chassis / Electric Parking Brake / Data List.

    5. Check the values by referring to the table below.


      Chassis > Electric Parking Brake > Data List
      Tester Display Measurement Item Range Normal Condition
      IG Status Power switch information display ON or OFF

      ON: Power switch is on (IG)

      OFF: Power switch is on (ACC) or off
      IG Switch IG power source information display ON or OFF

      ON: IG power source is input into parking brake ECU assembly

      OFF: IG power source is not input into parking brake ECU assembly

      Chassis > Electric Parking Brake > Data List
      Tester Display
      IG Status
      IG Switch
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    OK

  2. CHECK DTC


    1. Clear the DTCs.

      Click here


      Chassis > Electric Parking Brake > Clear DTCs

    2. Turn the power switch off.

    3. Check for DTCs.

      Click here


      Chassis > Electric Parking Brake > Trouble Codes
      Result
      Proceed to
      DTC is output
      DTC is not output

    DTC is output

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    DTC is not output

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the Q24 and Q25 parking brake ECU assembly connectors.

    3. Disconnect the 4A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q24-5 (IG) - 4A-32 Always Below 1 Ω
      Q24-5 (IG) or 4A-32 - Body ground Always 10 kΩ or higher
      Q25-9 (GND1) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR IG POWER SOURCE CIRCUIT

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR