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Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Start the inspection from step 1 when using the intelligent tester, and start from step  2 when not using the intelligent tester.

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER 
    1. Connect the intelligent tester to DLC3.
    2. Turn the ignition switch ON and push the intelligent tester main switch ON.
    3. Select the item below in the ACTIVE TEST and then check that the relay operates.

      BODY NO. 1 

      ITEM CONDITION CHART

      Item Test Details Diagnostic Note
      DIMMER SIG Turn DRL No.2 and No.4 relays ON/OFF w/DRL
      DIMMER SIG Turn Dimmer relay ON/OFF w/o DRL

    NG: Go to step   2 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the connector from the J/B No.2 (power distributor).
    2. Measure the voltage according to the value(s) in the table below.

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2I - 1 (+B) - Body ground Always 10 to 14 V
      3. Fig 1: Identifying J/B No.2 (Power Distributor) Connector Terminals
      G05273782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  3. CONFIRM MODEL 

    Result: 

    A: 

    w/ DRL 

    B: 

    w/o DRL 

    B: Go to step  14

    A: Go to Next step 

  4. INSPECT DAY TIME RUNNING LIGHT RELAY NO.3 (DRL NO. 3 RELAY) 
    1. Inspect DRL relay continuity.
      1. Check the resistance between the each of the terminals as shown in the table below.

        Resistance 

        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Terminal No. Specified condition
        3 - 5 10 kΩ or higher
        Below 1 Ω (When battery voltage is applied to terminals 3 and 5)
        3 - 4 Below 1 Ω
        10 kΩ or higher (When battery voltage is applied to terminals 3 and 5)
        Fig 2: Inspecting Day Time Running Light Relay No.3 (DRL No.3 Relay)
        G05273794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE DAY TIME RUNNING LIGHT RELAY NO.3 

    OK: Go to Next step 

  5. CHECK MODE MONITOR TERMINAL (DRL NO. 2, DRL NO. 4 RELAY) 
    1. Preparation
      1. Connect the connector.
      2. Remove the cover of the fusible link block assembly.
      3. Set the vehicle to the following condition.
        • Ignition switch ON.
        • Headlight dimmer switch HI (FLASH).
        • Light control switch ON.
    2. Check voltage
      1. Measure the voltage between the Mode Monitor Terminal and body ground.

        Result 

        RESULT REFERENCE CHART

        Condition Proceed to
        6.3 +- 2 V A
        Approx. 1 V B
        2. Fig 3: Identifying Mode Monitor Terminal
        G05201886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: Go to step  13

    A: Go to Next step 

  6. INSPECT JUNCTION BLOCK NO.2 (DRL NO. 2, DRL NO. 4 RELAY) 
    1. Turn the ignition switch to OFF position.
    2. Remove the J/B No. 2.
    3. Inspect the DRL No. 2 relay.
      Fig 4: Identifying J/B No. 2 (Power Distributor) Connector Terminals
      G05273796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the positive battery lead to terminal +B of the J/B No. 2 and the negative lead to terminal SGND, PGND.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        +B (2I-1) - SGND (2H-13), PGND (2F-1) Positive - Negative
      2. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester connection Specified Condition
        DRL2 (2I-2) - Battery negative terminal Below 1 V
      3. Connect the battery negative lead to terminal DRL of the J/B No.2.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        DRL (2H-7) Negative
      4. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester connection Specified Condition
        DRL2 (2I-2) - Battery negative terminal 10 to 14 V
    4. Inspect the DRL No.4 relay.
      1. Connect terminal HRE and DRL with wire.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        HRE (2G-10) - DRL (2H-7) Using wire harness
      2. Connect the positive battery lead to terminal +B of the J/B No.2 and the negative lead to terminal SGND, PGND.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        +B (2I-1) - SGND (2H-13), PGND (2F-1) Positive - Negative
      3. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester connection Specified Condition
        DRL2 (2I-2) - Battery negative terminal Below 1 V
      4. Connect the battery negative lead to terminal HRLY of the J/B No.2.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        HRLY (2H-8) Negative
      5. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester connection Specified Condition
        DRL2 (2I-2) - Battery negative terminal 10 to 14 V

    NG: REPLACE JUNCTION BLOCK NO.2 

    OK: Go to Next step 

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (DRL SIGNAL CIRCUIT) 
    1. Disconnect the connectors from the instrument panel J/B.
      Fig 5: Identifying Instrument Panel Junction Block Assembly Front Side Connector Terminals
      G05273797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Reconnect the J/B No. 2 connector.

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

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified Condition
      1D-9 - Body ground Always 10 to 14 V

    B: Go to step  12

    OK: Go to Next step 

  8. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - BULB) 
    1. Disconnect the connectors from the J/B No.2 (power distributor).
      Fig 6: Identifying J/B No.2 (Power Distributor) Connector Terminals
      G05273798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the connector from the headlight bulb.
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2I-2 (DRL2) - H4-2 (Headlight LH) Always Below 1 Ω
      2I-2 (DRL2) - body ground Always 10 kΩ or higher
      4. Fig 7: Identifying H4 Headlight Bulb Connector Terminals
      G05273799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  9. CHECK HARNESS AND CONNECTOR (BULB - J/B NO. 2) 
    1. Disconnect the connectors from the J/B No.2 (power distributor).
      Fig 8: Identifying 2G J/B No.2 (Power Distributor) Connector Terminals
      G05273800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2G-11 (HLE) - H4-1 (Headlight LH) Always Below 1 Ω
      2G-11 (HLE) - Body ground Always 10 kΩ or higher
      2G-10 (HRE) - H8-1 (Headlight RH) Always Below 1 Ω
      2G-10 (HRE) - Body ground Always 10 kΩ or higher
      Fig 9: Identifying H4 And H8 Headlight Bulb Connector Terminals
      G05273801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  10. CHECK HARNESS AND CONNECTOR (BULB - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      H8-2 (Headlight RH) - Body ground Always Below 1 Ω
      Fig 10: Identifying H8 Headlight Bulb Connector Connector Terminals
      G05273802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  11. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - RELAY BLOCK NO. 3) 
    1. Remove the DRL No.3 relay from the relay block No.3.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2I-2 (DRL2) - 1 (Relay block No.3) Always Below 1 Ω
      2I-2 (DRL2) - Body ground Always 10 kΩ or higher
      Fig 11: Identifying 2I J/B No. 2 Connector Terminals
      G05273804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  12. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - INSTRUMENT PANEL J/B) 
    1. Disconnect the connectors from the instrument panel J/B.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2H-7 (DRL) - 1D-9 Always Below 1 Ω
      2H-7 (DRL) - Body ground Always 10 kΩ or higher
      Fig 12: Identifying 2H J/B No. 2 Connector Terminals
      G05273805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 13: Identifying Instrument Panel Junction Block Assembly Front Side Connector Terminals
      G05273806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  13. CHECK MODE MONITOR TERMINAL (SHORT CIRCUIT DRIVEN SIDE BY RELAY) 
    1. Connect the connectors.
    2. Remove the headlight bulbs.
    3. Ignition switch ON.
    4. Check voltage
      1. Measure the voltage between the Mode Monitor Terminal and body ground.

        Result 

        RESULT REFERENCE CHART

        Condition Proceed to
        6.3 +- 2 V A
        Approx. 1 V B
        2. Fig 14: Identifying Mode Monitor Terminal
        G05273807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    A: REPLACE BULB 

  14. CHECK MODE MONITOR TERMINAL (DIM RELAY) 
    1. Preparation
      1. Connect the connector.
      2. Remove the cover of the fusible link block assembly.
      3. Set the vehicle to the following condition.
        • Ignition switch ON.
        • Headlight dimmer switch HI (FLASH).
        • Light control switch ON.
    2. Check voltage
      1. Measure the voltage between the Mode Monitor Terminal and body ground.

        Result 

        RESULT REFERENCE CHART

        Condition Proceed to
        6.3 +- 2 V A
        Approx. 1 V B
        Fig 15: Identifying Mode Monitor Terminal
        G05273807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: Go to step  20

    A: Go to Next step 

  15. INSPECT JUNCTION BLOCK NO.2 (DIM RELAY) 
    1. Turn the ignition switch to OFF position.
    2. Remove the J/B No. 2.
    3. Inspect the DRL relay.
      Fig 16: Identifying J/B No. 2 (Power Distributor) Connector Terminals
      G05273809Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the positive battery lead to terminal +B of the J/B No. 2 and the negative lead to terminal SGND, PGND.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        +B (2I-1) - SGND (2H-13), PGND (2F-1) Positive - Negative
      2. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester connection Specified Condition
        DRL2 (2I-2) - Battery negative terminal Below 1 V
      3. Connect the battery negative lead to terminal DRL of the J/B No.2.
        ECU CONNECTOR TERMINALS AND SYMBOLS SPECIFIED CONDITION

        Symbols (terminals No.) Connection
        DRL (2H-7) Negative
      4. Measure the voltage according to the value(s) in the table below.

        Voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester connection Specified Condition
        DRL2 (2I-2) - Battery negative terminal 10 to 14 V

    NG: REPLACE JUNCTION BLOCK NO.2 

    OK: Go to Next step 

  16. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (DRL SIGNAL CIRCUIT) 
    1. Disconnect the connector from the instrument panel J/B.
      Fig 17: Identifying Instrument Panel Junction Block Assembly Front Side Connector Terminals
      G05273797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Reconnect the J/B No. 2 connector.

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

      Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection (Symbols) Condition Specified Condition
      1D-9 -Body ground Always 10 to 14 V

    NG: Go to step  19

    OK: Go to Next step 

  17. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - BULB) 
    1. Disconnect the connectors from the J/B No. 2 (power distributor).
      Fig 18: Identifying 2I J/B No. 2 (Power Distributor) Connector Terminals
      G05273811Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the connector from the headlight bulb.
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2I-2 (DRL2) - H4-2 (Headlight LH) Always Below 1 Ω
      2I-2 (DRL2) - H8-2 (Headlight RH) Always Below 1 Ω
      2I-2 (DRL2) - body ground Always 10 kΩ or higher
      Fig 19: Identifying H4 And H8 Headlight Bulb Connector Terminals
      G05273812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  18. CHECK HARNESS AND CONNECTOR (BULB - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      H4-1 (Headlight LH) -body ground Always Below 1 Ω
      H8-1 (Headlight RH) -body ground Always Below 1 Ω
      Fig 20: Identifying H4 And H8 Headlight Bulb Connector Terminals
      G05273813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE JUNCTION BLOCK NO.2 

  19. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - INSTRUMENT PANEL J/B) 
    1. Disconnect the connectors from the instrument panel J/B.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2H-7 (DRL) - 1D-9 Always Below 1 Ω
      2H-7 (DRL) - Body ground Always 10 kΩ or higher
      Fig 21: Identifying 2H J/B No. 2 (Power Distributor) Connector Terminals
      G05273814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 22: Identifying Instrument Panel Junction Block Assembly Front Side Connector Terminals
      G05273815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  20. CHECK HARNESS AND CONNECTOR (J/B NO. 2 - BULB) 
    1. Disconnect the connectors from the J/B No. 2 (power distributor) and headlight bulb.
      Fig 23: Identifying 2I J/B No. 2 (Power Distributor) Connector Terminals
      G05273816Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the connector from the headlight bulb.
    3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      2I-2 (DRL2) - H4-2 (Headlight LH) Always Below 1 Ω
      2I-2 (DRL2) - H8-2 (Headlight RH) Always Below 1 Ω
      Fig 24: Identifying H4 And H8 Headlight Bulb Connector Terminals
      G05273817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  21. CHECK HARNESS AND CONNECTOR (BULB - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester connection Condition Specified value
      H4-1 (Headlight LH) - body ground Always Below 1 Ω
      H8-1 (Headlight RH) - body ground Always Below 1 Ω
      Fig 25: Identifying H4 And H8 Headlight Bulb Connector Terminals
      G05273818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE JUNCTION BLOCK NO.2 

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