LIGHTING SYSTEM Taillight Relay Circuit

DTC Code DTC Name
Taillight Relay Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

WIRING DIAGRAM

E259588E02

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. PERFORM ACTIVE TEST USING GTS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. Check that the relay operates.

      Body Electrical > Main Body > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Taillight Relay

      Taillight relay

      ON/OFF

      -

      Body Electrical > Main Body > Active Test

      Tester Display

      Taillight Relay

      OK

      Taillight relay operates. (Taillights illuminate.)

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick hereClick hereClick here

    NG

  2. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

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

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      3B-1 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

      for LHD:Click hereClick here

      for RHD:Click hereClick here

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

      E259589C01

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

    3. Connect a positive (+) lead from the battery to terminal 3B-1.

    4. Connect a negative (-) lead from the battery to terminal MB-14 (TRLY).

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      3A-7 - Battery negative terminal

      Always

      11 to 14 V

      3A-8 - Battery negative terminal

      Always

      11 to 14 V

      3E-17 - Battery negative terminal

      Always

      11 to 14 V

      3E-32 - Battery negative terminal

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:Click hereClick here

    for RHD:Click hereClick here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:Click hereClick here

    for RHD:Click hereClick here