POWER DOOR LOCK CONTROL SYSTEM Collision Door Lock Release Function does not Operate

DESCRIPTION

When an impact is detected, a relay inside the door control battery is operated to switch the power source of the door lock with motor assemblies from the vehicle battery to the door control battery.

WIRING DIAGRAM

A01VA5VE01

CAUTION / NOTICE / HINT

Note


  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.

    Click here

PROCEDURE


  1. CHECK DOOR LOCK OPERATION


    1. Check door lock operation.

      Click here

      OK
      All doors lock and unlock normally.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  2. CHECK DOOR CONTROL BATTERY (BATTERY VOLTAGE)


    1. A01VB3WC22
      *a

      Front view of wire harness connector

      (to Door Control Battery)

      Disconnect the door control battery connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N37-8 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - DOOR CONTROL BATTERY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - DOOR CONTROL BATTERY)


    1. Disconnect the 3B instrument panel junction block assembly connector.

    2. Disconnect the N37 door control battery connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-52 (ACTG) - N37-9 (ACTG) Always Below 1 Ω
      3B-52 (ACTG) or N37-9 (ACTG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      for LHD: Click here

      for RHD: Click here

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

      A01V8CMC01
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      A-7 (ACTG) - 3B-52 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: Click here for RHD: Click here

    OK

  5. REPLACE DOOR CONTROL BATTERY


    1. Replace the door control battery with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK DOOR CONTROL BATTERY


    1. Check door control battery operation.

      Click here

      OK
      Collision detection door lock function operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (DOOR CONTROL BATTERY WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: Click here for RHD: Click here

  7. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - DOOR CONTROL BATTERY)


    1. Disconnect the 3B instrument panel junction block assembly connector.

    2. Disconnect the N37 door control battery connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-50 - N37-8 (IG) Always Below 1 Ω
      3B-50 or N37-8 (IG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BATTERY VOLTAGE)


    1. A01V7Y2C01
      *a

      Component with harness connected

      (Instrument Panel Junction Block Assembly)

      Disconnect the instrument panel junction block assembly.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      3B-50 - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: Click here for RHD: Click here

    NG

    GO TO LIGHTING SYSTEM (IG Signal Circuit) Click here