ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A2/22

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

DESCRIPTION

for LHD:

When the power switch is turned ON (IG), the IG operation power supply is output from the main body ECU. Power is then supplied from the luggage room junction block's RR-IG1 relay, which turns the RR-IG1 relay ON. Power is then supplied to the electric parking brake ECU.

for RHD:

When the power switch is turned ON (IG), the IG operation power supply is output from the main body ECU and the passenger side junction block's P-IG1 relay turns ON. Power is then supplied from the P-IG1 relay to the luggage room junction block's RR-IG1 relay, which turns the RR-IG1 relay ON. Power is then supplied to the electric parking brake ECU.

DTC Code Detection Condition Trouble Area
C13A2/22

Both of following conditions are met:


  1. Power switch is ON (IG)

  2. When hybrid vehicle control ECU, ECM or G sensor is communicating through CAN communication, operation power supply is not input from power switch for approx. 3 seconds

  • RR-IG1-1 fuse

  • D-IG1-3 fuse (for LHD)

  • P-IG1-3 fuse (for RHD)

  • Luggage room junction block

  • Passenger side junction block (for RHD)

  • Main body ECU

  • Harness or connector

  • Electric parking brake ECU

  • Power switch

WIRING DIAGRAM

A000VG1E13
A000Y0YE03

CAUTION / NOTICE / HINT

Note


  • If the electric parking brake ECU or parking brake with bracket actuator assembly is replaced, perform the "Reset Memory" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Click here.

  • Even after the power switch is turned OFF, the electric parking brake ECU may store a DTC as a result of removing a connector or fuse, as the ECU is still operating. Therefore, during inspection or replacement, turn the power switch OFF and wait for 20 seconds before removing the following: 1) connectors of the electric parking brake ECU, and 2) fuses of the electric parking brake system circuit.

PROCEDURE


  1. CHECK IG VOLTAGE (DATA LIST)


    1. Turn the power switch OFF.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch ON (IG) and the tester ON.

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

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

      Electric Parking Brake
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      IG Status

      Power switch information display/

      ON or OFF

      ON: Power switch is ON (IG)

      OFF: Power switch is ON (ACC) or OFF

      		 IG circuit
      IG Switch

      IG power source information display/

      ON or OFF

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

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

      		 IG circuit
      OK
      On tester screen, item changes between ON and OFF according to switch operation.

    NG

    INSPECT FUSE Click here

    OK

  2. CHECK DTC


    1. Clear the DTC Click here.

    2. Check for DTC.

      Result
      Result Proceed to
      C13A2/22 is output A
      DTC is not output B

    A

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  3. INSPECT FUSE


    1. Remove the RR-IG1-1fuse from the luggage room junction block.

    2. for LHD:


      1. Remove the D-IG1-3 fuse from the main body ECU.

    3. for RHD:


      1. Remove the P-IG1-3 fuse from the passenger side junction block.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      RR-IG1-1 fuse Always Below 1 Ω
      D-IG1-3 fuse Always Below 1 Ω
      Standard resistance
      for RHD
      Tester Connection Condition Specified Condition
      RR-IG1-1 fuse Always Below 1 Ω
      P-IG1-3 fuse Always Below 1 Ω

    NG

    CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

    OK

  4. CHECK HARNESS AND CONNECTOR (ECU - LUGGAGE ROOM JUNCTION BLOCK AND BODY GROUND)

    A000Y8DE02
    *1 Front view of wire harness connector: (to Electric Parking Brake ECU)
    *2 Front view of wire harness connector: (to Luggage Room Junction Block)

    1. Disconnect the S46 and S48 ECU connector.

    2. Disconnect the LA luggage room junction block connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S48-4 (IG) - LA-21 Always Below 1 Ω
      S48-4 (IG) - Body ground Always 10 kΩ or higher
      S46-3 (GND1) - Body ground Always Below 1 Ω
      LA-43 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK LUGGAGE ROOM JUNCTION BLOCK (RR-IG1 RELAY)


    1. Disconnect the S48 ECU connector.

    2. A000ZIUE02
      *1 Front view of wire harness connector: (to Electric Parking Brake ECU)

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      S48-4 (IG) - Body ground Power switch on (IG) 11 to 14 V

    OK

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    NG

  6. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - AUXILIARY BATTERY)


    1. Disconnect the LG luggage room junction block connector.

    2. A000ULTE01
      *1 Front view of wire harness connector: (to Luggage Room Junction Block)

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

      Standard voltage
      Tester Connection Condition Specified Condition
      LG-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - AUXILIARY BATTERY)


    1. Disconnect the LD luggage room junction block connector.

    2. A000ZQ2E01
      *1 Front view of wire harness connector: (to Luggage Room Junction Block)

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      LD-24 - Body ground Power switch on (IG) 11 to 14 V
      Result
      Result Proceed to
      NG (for LHD) A
      NG (for RHD) B
      OK C

    B

    CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - PASSENGER SIDE JUNCTION BLOCK) Click here

    C

    REPLACE LUGGAGE ROOM JUNCTION BLOCK

    A

  8. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - MAIN BODY ECU)

    A000W84E02
    *1 Front view of wire harness connector: (to Luggage Room Junction Block)
    *2 Front view of wire harness connector: (to Main Body ECU)

    1. Disconnect the LD luggage room junction block connector.

    2. Disconnect the DD main body ECU connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      LD-24 - DD-23 Always Below 1 Ω
      LD-24 - Body ground Always 10 kΩ or higher

    OK

    GO TO ENTRY AND START SYSTEM (Power Source Mode does not Change) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - PASSENGER SIDE JUNCTION BLOCK)

    A000XXYE02
    *1 Front view of wire harness connector: (to Luggage Room Junction Block)
    *2 Front view of wire harness connector: (to Passenger Side Junction Block)
    *3 PJ

    1. Disconnect the LD luggage room junction block connector.

    2. Disconnect the PJ passenger side junction block connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      LD-24 - PJ-25 Always Below 1 Ω
      LD-24 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - AUXILIARY BATTERY)


    1. Disconnect the PL passenger side junction block connector.

    2. A000VKBE01
      *1 Front view of wire harness connector: (to Passenger Side Junction Block)

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

      Standard voltage
      Tester Connection Condition Specified Condition
      PL-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - BODY GROUND)


    1. Disconnect the PA passenger side junction block connector.

    2. A000YLHE02
      *1 Front view of wire harness connector: (to Passenger Side Junction Block)
      *2 PA

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

      Standard resistance
      Tester Connection Condition Specified Condition
      PA-39 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - MAIN BODY ECU)


    1. Disconnect the PA passenger side junction block connector.

    2. A000YLHE02
      *1 Front view of wire harness connector: (to Passenger Side Junction Block)
      *2 PA

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      PA-15 - Body ground Power switch ON (IG) 11 to 14 V

    OK

    REPLACE PASSENGER SIDE JUNCTION BLOCK

    NG

  13. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - MAIN BODY ECU)


    1. Disconnect the PA passenger side junction block connector.

    2. Disconnect the DA main body ECU connector.

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

      A000X1SE02
      *1 Front view of wire harness connector: (to Passenger Side Junction Block)
      *2 Front view of wire harness connector: (to Main Body ECU)
      *3 PA
      Standard resistance
      Tester Connection Condition Specified Condition
      PA-15 - DA-54 Always Below 1 Ω
      PA-15 - Body ground Always 10 kΩ or higher

    OK

    GO TO ENTRY AND START SYSTEM (Power Source Mode does not Change) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR