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Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FUSE 
    1. Inspect the ECU-IG No.2 fuse in the instrument panel junction block assy.

      Standard: 

      Below 1 Ω 

    1. NG: REPLACE FUSE 
    2. OK: Go to next step. 
  2. INSPECT IG1 RELAY 
    1. Measure the resistance according to the value (s) in the table below.
      Fig 1: Identifying IG1 Relay
      G03007547Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified resistance
      3 - 5 Always 10 kΩ or higher
      3 - 5 Apply B+ between the terminal 1 and 2 Below 1 Ω
    1. NG: REPLACE IG1 RELAY 
    2. OK: Go to next step. 
  3. INSPECT HEADLIGHT BEAM LEVEL CONTROL ECU 
    1. Disconnect the H17 connector of headlight beam level control ECU.
    2. Measure the voltage according to the value (s) in the table below.
      Fig 2: Identifying Headlight Beam Level Control ECU Connector
      G03007548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      H17-14 (IG) - H17-1 (GND) Ignition switch OFF --> ON Below 1 V --> 10 to 14V
    1. NG: Go to step 4. 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT BEAM LEVEL CONTROL ECU - BODY GROUND) 
    1. Disconnect the H17 connector of headlight beam level control ECU.
    2. Measure the resistance according to the value (s) in the table below.
      Fig 3: Identifying H17 Connector Of Headlight Beam Level Control ECU
      G03007549Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      H17-1 (GND) - Body ground Always Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (POWER SOURCE CIRCUIT) 
    1. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      1A-1 - Body ground Always 10 to 14 V
      Fig 4: Identifying Instrument Panel Junction Block Connector
      G03007550Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSY) 
    2. OK: Go to next step. 
  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    1. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      1F-19 - Body ground Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
      Fig 5: Identifying Instrument Panel Junction Block Assy Connector
      G03007551Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step 7. 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSY - HEADLIGHT BEAM LEVEL CONTROL ECU) 
  7. INSPECT IGNITION SWITCH 
    1. Disconnect the ignition switch connector.
    2. Measure the resistance according to the value (s) in the table below.
      Fig 6: Identifying Ignition Switch Connector
      G03007552Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      2 - 4 Ignition switch OFF 10 kΩ or higher
      2 - 4 Ignition switch ON Below 1Ω
    1. NG: REPLACE IGNITION SWITCH 
    2. OK: Go to next step. 
  8. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    1. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      1I-4 - Body ground Always 10 to 14 V
      Fig 7: Identifying Instrument Panel Junction Block Assy Connector
      G03007553Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. OK: Go to next step. 
  9. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    1. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      1I-9 - Body ground Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
      Fig 8: Identifying Instrument Panel Junction Block Assy Connector
      G03007554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  10. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSY - BODY GROUND) 
    1. Disconnect the 1F connector from the instrument panel junction block assy.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      1F-10 - Body ground Always Below 1 Ω
      Fig 9: Identifying Instrument Panel Junction Block Assy Terminal Connector
      G03007555Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
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