LIGHTING SYSTEM Taillight Relay Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) controls the operation of the TAIL relay.

WIRING DIAGRAM

A01EJSOE01

INSPECTION PROCEDURE

Note

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

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Taillight Relay Taillight relay ON/OFF -
      OK
      Taillight relay operates. (Taillights illuminate.)

    NG

    INSPECT TAILLIGHT RELAY (TAIL) Click here

    OK

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

  2. INSPECT TAILLIGHT RELAY (TAIL)


    1. A01EKI6E11

      Remove the taillight relay from the main body ECU (driver side junction block assembly).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Voltage is applied between terminals 1 and 2 Below 1 Ω
      3 - 4 Voltage is not applied between terminals 1 and 2 Below 1 Ω
      Voltage is applied between terminals 1 and 2 10 kΩ or higher

    NG

    REPLACE TAILLIGHT RELAY

    OK

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


    1. A01ELS4E11
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU (Driver Side Junction Block Assembly))

      Disconnect the 2A main body ECU (driver side junction block assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2A-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here