LIGHTING SYSTEM ACC Signal Circuit

DESCRIPTION

This circuit detects the power switch on (ACC) or off condition, and sends it to the main body ECU (multiplex network body ECU).

WIRING DIAGRAM

Figure 1. for LHD:

B004BOJE02

Figure 2. for RHD:

B004BOJE03

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. CHECK FOR DTC (ENTRY AND START SYSTEM [for Start Function])


    1. Check for the DTCs.

      Click here


      Body Electrical > Power Source Control > Trouble Codes
      OK
      Entry and start system (for Start Function) DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO ENTRY AND START SYSTEM (for Start Function) Click here

    OK

  2. READ VALUE USING GTS


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

      Click here


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ACC SW Power switch on (ACC) signal OFF or ON

      OFF: Power switch off

      ON: Power switch on (ACC)

      		 "ON" is also displayed for this item when the power switch is on (IG).

      Body Electrical > Main Body > Data List
      Tester Display
      ACC SW
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BATTERY AND BODY GROUND)


    1. B004AJRC04
      *a

      Front view of wire harness connector

      (to Driver Side Junction Block Assembly)

      Disconnect the driver side junction block assembly connector.

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      3F-1 - Body ground Power switch off 11 to 14 V
      3B-17 - Body ground Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      3F-1 - Body ground Power switch off 11 to 14 V
      3B-18 - Body ground Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      3B-6 - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      3B-7 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B004A3OC07
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      3F-1 - A-30 (ACC) Auxiliary battery not connected to 3B-17 and 3B-6 10 kΩ or higher

      Auxiliary battery positive (+) → 3B-17

      Auxiliary battery negative (-) → 3B-6

      		 Below 1 Ω
      3B-6 - A-11 (GND1) Always Below 1 Ω
      for RHD:
      Tester Connection Condition Specified Condition
      3F-1 - A-30 (ACC) Auxiliary battery not connected to 3B-18 and 3B-7 10 kΩ or higher

      Auxiliary battery positive (+) → 3B-18

      Auxiliary battery negative (-) → 3B-7

      		 Below 1 Ω
      3B-7 - A-11 (GND1) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here