LIGHTING SYSTEM(for Halogen Headlight) Taillight Relay Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) receives headlight dimmer switch information signals and illuminates the clearance lights, taillights and license plate light.

WIRING DIAGRAM

Figure 1. except 5L-E:

B001HJ9E01

Figure 2. for 5L-E:

B001HJ9E02

CAUTION / NOTICE / HINT

Note


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

  • w/ Entry and Start System:

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Using the GTS, perform the Active Test.

      Click here

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Taillight Relay Clearance lights, taillights and license plate light OFF or ON -
      OK
      Clearance lights, taillights and license plate light turn on.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B001DRHC01
      *A except 5L-E *B for 5L-E
      *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 voltage according to the value(s) in the table below.

      Standard Voltage
      except 5L-E
      Tester Connection Condition Specified Condition
      2M-26 - Battery negative (-) terminal Battery not connected to 2K-1 and A-14 (TRLY) Below 1 V

      Battery positive (+) → 2K-1

      Battery negative (-) → A-14 (TRLY)

      		 11 to 14 V
      for 5L-E
      Tester Connection Condition Specified Condition
      2F-7 - Battery negative (-) terminal Battery not connected to 2K-1 and A-14 (TRLY) Below 1 V

      Battery positive (+) → 2K-1

      Battery negative (-) → A-14 (TRLY)

      		 11 to 14 V
      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