FixVault
Home › Lexus › 2004 › LS 430 › Repair and Diagnosis › Accessories & Equipment › Cruise Control Systems › Dynamic Laser Cruise Control System - Diagnosis › Laser Sensor Power Source Circuit › Inspection Procedure

Inspection Procedure

  1. INSPECT LASER SENSOR 
    1. Disconnect the laser sensor connector.
    2. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION CHART

      Tester connection Condition Specified value
      L1-5 (IGB) - Body ground Ignition SW ON 10 to 14 V
      Fig 1: Disconnecting Laser Sensor Connector
      G03513931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   3 . 
    2. OK: Go to next step. 
  2. CHECK WIRE HARNESS AND CONNECTOR 
    1. Disconnect the ECM E3 connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION CHART

      Tester connection Condition Specified value
      L1-1 (LGND) - E3-29 (LGND) Always Below 1Ω
      L1-1 (LGND) - Body ground Always 10 kΩ or higher
      L1-2 (SGND) - Body ground Always Below 1 Ω
      Fig 2: Identifying Wire Harness And Connector (Laser Sensor)
      G03513932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Identifying Wire Harness And Connector (ECM)
      G03513933Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
  3. CHECK WIRE HARNESS AND CONNECTOR (LASER SENSOR - DISTANCE CONTROL ECU) 
    1. Disconnect the cruise control ECU (distance control ECU) connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION CHART

      Tester connection Condition Specified value
      D2-13 (IGB) - L1-5 (IGB) Always Below 1 Ω
      D2-13 (IGB) - Body ground Always 10 kΩ or higher
      Fig 4: Checking Wire Harness And Connector (Laser Sensor)
      G03513934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 5: Checking Wire Harness And Connector (Distance Control ECU)
      G03513935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
About FixVault