2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. CHECK SHIFT LOCK OPERATION 
    1. Move the shift lever to P.
    2. Turn the ignition switch OFF.
    3. Check that the shift lever cannot be moved to any position other than P.
    4. Turn the ignition switch ON, depress the brake pedal and check that the shift lever can be moved to other positions.
  2. CHECK SHIFT LOCK RELEASE BUTTON OPERATION 
    1. When operating the shift lever with the shift lock release button pressed, check that the lever can be moved to any position other than P.

      If the operation cannot be performed as specified, check the shift lever assembly.

  3. CHECK KEY INTERLOCK OPERATION 
    1. Turn the ignition switch ON.
    2. Depress the brake pedal and move the shift lever to any position other than P.
    3. Check that the ignition switch cannot be turned OFF.
    4. Move the shift lever to P, turn the ignition switch OFF and check that the key can be removed.

      If the results are not as specified, inspect the shift lock control unit.

  4. CHECK SHIFT LOCK CONTROL ECU 
    1. Measure the voltage of the connector.

      HINT:

      Do not disconnect the shift lock control ECU connector.

      Fig 1: Identifying Shift Lock Control ECU Connector Terminals
      G05289742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      6 (ACC) - 8 (E) Ignition switch ON 10 to 14 V
      6 (ACC) - 8 (E) Ignition switch ACC 10 to 14 V
      6 (ACC) - 8 (E) Ignition switch OFF Below 1 V
      7 (STP) - 8 (E) Depress brake pedal 10 to 14 V
      7 (STP) - 8 (E) Release brake pedal Below 1 V
      12 (KLS+) - 8 (E) Ignition switch ACC and shift lever on P Below 1 V
      12 (KLS+) - 8 (E) Ignition switch ACC and shift lever not on P 7.5 to 11 V
      12 (KLS+) - 8 (E) Ignition switch ACC and shift lever not on P (after approx. 1 second) 6 to 9 V
      1 (IG) - 8 (E) Ignition switch ON 10 to 14 V
      1 (IG) - 8 (E) Ignition switch OFF Below 1 V
    2. Measure the resistance of the connector.

      HINT:

      Do not disconnect the shift lock control ECU connector.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Measuring Condition Specified Condition
      8 (E) - Body ground Always Below 1 Ω

      If the result is not as specified, replace the shift lock control ECU.

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:

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

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