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 IG power source voltage is not supplied to the parking brake ECU assembly when communication with other ECUs is established.

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

Both of following conditions are met:


  1. Power switch on (IG)

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

  • Wire harness or connector

  • IG power source circuit

  • Parking brake ECU assembly

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

WIRING DIAGRAM

A001R4OE01
*a ECU-IG1 NO. 1
*b to CAN
*c Parking Brake ECU Assembly
*d CAN Communication Line

CAUTION / NOTICE / HINT

Note


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

  • The electric parking brake may still operate up to 20 seconds after the power switch is turned off. 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 (electric parking brake switch 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 SWITCH)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

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

    6. Read the Data List according to the display on the GTS.


      Chassis > Electric Parking Brake > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      IG Switch IG power source status OFF or ON

      OFF: IG power source voltage is not input to skid control ECU (brake booster with master cylinder assembly)

      ON: IG power source voltage is input to skid control ECU (brake booster with master cylinder assembly)

      		 -

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

    NG

    CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - POWER SOURCE AND BODY GROUND) 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
      Result Proceed to
      DTCs are output A
      DTCs are not output B

    A

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. Disconnect the M71 and M70 parking brake ECU assembly connectors.

      A001OY3C11
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

      		 - -

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      M71-5 (IG) - Body ground Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M70-9 (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