LIGHTING SYSTEM(except 5L-E) Interior Light Auto Cut Circuit

DESCRIPTION

When the battery saving control operates, the main body ECU (multiplex network body ECU) controls the operation of the DOME relay that is built into the No. 1 integration relay to turn off the interior lights.

WIRING DIAGRAM

B001G87E03

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. All of the interior lights turn on.

    2. Perform the Active Test according to the display on the GTS.

      Click here

      Main Body
      Tester Display Measurement Item Control Range Diagnostic Note
      Relay for Interior Light Auto Cut Function DOME relay OFF or ON

      OFF: DOME relay on (interior lights turn on)

      ON: DOME relay off (interior lights turn off)
      OK
      All of the interior lights turn off when ON is selected.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT NO. 1 INTEGRATION RELAY


    1. B001DBZC01
      *a

      Component without harness connected

      (No. 1 Integration Relay)

      Remove the No. 1 integration relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1U-6 - 1U-7 Battery not connected to 1U-5 and 1U-8 Below 1 Ω

      Battery positive (+) → 1U-8

      Battery negative (-) → 1U-5

      		 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 INTEGRATION RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BATTERY)


    1. Remove the No. 1 integration relay.

    2. Disconnect the 2M and 2N driver side junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1U-5 - 2N-25 Always Below 1 Ω
      1U-6 - 2M-31 Always Below 1 Ω
      1U-5 or 2N-25 - Body ground Always 10 kΩ or higher
      1U-6 or 2M-31 - Body ground Always 10 kΩ or higher

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      1U-7 - Body ground Always 11 to 14 V
      1U-8 - Body ground Always 11 to 14 V
      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

      B001EOTC01
      *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
      Tester Connection Condition Specified Condition
      2N-25 - A-23 (DOME) Always Below 1 Ω
      2M-31 - 2N-20 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