2004 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Checking Monitor Status

HINT:

"MONITOR RESULT" indicates normal or malfunction of component and system when judgment has done.

HOW TO READ MONITOR RESULTΒ 

  1. Connect the hand-held tester to the DLC 3.
  2. Enter the following menus DIAGNOSIS/ ENHANCED OBD II/ MONITOR INFO/ MONITOR RESULT.

    The Test ID will appear at the beginning of each line, followed by INCMP, PASS, or FAIL.

    HINT:

    • INCMP: Stands for "incomplete". The diagnosis is incomplete.
    • PASS: The component or system is operating normally.
    • FAIL: A malfunction has been detected.
      Fig 1: Monitor Result Display (1 Of 3)
      G01447307Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
  3. Select a Test ID from the list and press "ENTER" The following screen will appear:
    1. VAL (TEST VALUE) [Test Data] [Unit]
    2. LMT (TEST LIMIT) [Test Limit] [Unit]
    3. TLT [Test Limit Type]
      Fig 2: Monitor Result Display (2 Of 3)
      G01447308Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
  4. By pressing the "HELP" button, you can see more information.
    Fig 3: Monitor Result Display (3 Of 3)
    G01447309Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    • Monitor test results can be viewed in the MONITOR RESULT screen.
    • Monitor test results indicate the latest malfunction judgement result of this diagnostic.
    • TEST VALUE indicates the detection parameter value (Example: P0128 Thermostat Malfunction = Engine coolant temperature) at the time of malfunction (or normal) judgement is done.
    • TEST LIMIT indicates a threshold of malfunction judgment (Example: P0128 Thermostat Malfunction = 75Β°C).
    • When the monitor runs, the monitored Parameter's VALUE is recorded. The value is then compared to the TEST LIMIT to determine if the result is PASS or FAIL.
    • By comparing the Parameter VALUE to the TEST LIMIT, it is possible to determine the degree of failure.
    • In rare cases, the monitor may have passed even with a DTC set and MIL illuminated. The monitor may have failed on a previous trip, and then passed on the most recent trip. This would indicated an intermittent problem may be the cause of the DTC.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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