EASY AND SMOOTH START SYSTEM, Diagnostic DTC:P1649/31

DTC Code DTC Name
P1649/31 Parking Brake SW

DESCRIPTION

DTC No. Detection Condition Trouble Area
P1649/31 At a vehicle speed of 10 km/h or more, parking brake switch ON status continues for 10 seconds.

  • Parking brake switch assembly installation

  • Parking brake switch assembly

  • Harness or connector

  • Electric vehicle control ECU assembly

WIRING DIAGRAM

A01CITBE01

INSPECTION PROCEDURE

Note


  • After replacing the electric vehicle control ECU assembly, perform clutch pedal stroke sensor assembly release position calibration Click here.

  • DTCs stored in the electric vehicle control ECU assembly are not cleared even after the system returns to a normal condition, so clear the DTCs after performing troubleshooting Click here.

Tech Tips

DTC P1649/31 is also output if the vehicle is driven without releasing the parking brake. Operate the parking brake lever and check the Data List item "Parking Brake Switch", and if there is no malfunction in the Data List and this DTC becomes a history DTC, then this DTC did not indicate a malfunction Click here.

PROCEDURE


  1. CHECK PARKING BRAKE SWITCH ASSEMBLY INSTALLATION


    1. Check the installation condition of the parking brake switch assembly Click here.

      OK
      Correctly installed.

    NG

    INSTALL PARKING BRAKE SWITCH ASSEMBLY CORRECTLY Click here

    OK

  2. CHECK ELECTRIC VEHICLE CONTROL ECU ASSEMBLY (PKB TERMINAL)


    1. Turn the ignition switch to ON.

    2. A01CHH1E08
      Text in Illustration
      *a

      Component with harness connected

      (to Electric Vehicle Control ECU Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E43-22 (PKB) - Body ground

      Ignition switch ON

      Parking brake switch assembly ON (parking brake applied)

      		 Below 1 V

      Ignition switch ON

      Ignition switch ON Parking brake switch assembly off (parking brake released)

      		 20 V or higher

    NG

    INSPECT PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

  3. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  4. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    B

    REPLACE ELECTRIC VEHICLE CONTROL ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  5. INSPECT PARKING BRAKE SWITCH ASSEMBLY


    1. Turn the ignition switch off.

    2. Remove the P27 parking brake switch assembly.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      P27-1 - Body ground Switch pin free Below 1 Ω
      Switch pin pushed in 10 kΩ or higher

    NG

    REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (ELECTRIC VEHICLE CONTROL ECU ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY)


    1. Turn the ignition switch off.

    2. Disconnect the E43 electric vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E43-22 (PKB) - P27-1 Always Below 1 Ω
      E43-22 (PKB) or P27-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ELECTRIC VEHICLE CONTROL ECU ASSEMBLY Click here