2008 Lexus LS 460LFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

HINT:

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

  1. CHECK STEERING LOCK ACTUATOR (SLP1 VOLTAGE) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition (Steering Lock Position) Specified Condition
      L33-4 (SLP1) - L33-2 (SGND) Locked 11 to 14 V
      L33-4 (SLP1) - L33-2 (SGND) Unlocked Below 1 V
      Fig 1: Identifying Steering Lock Actuator Connector Terminals
      G04950149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START  (See HOW TO PROCEED WITH TROUBLESHOOTING )

    NG: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR - MAIN BODY ECU) 
    Fig 2: Identifying L13 Main Body ECU And L33 Steering Lock Actuator Connector
    G05851415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L13 main body ECU connector.
    2. Disconnect the L33 steering lock actuator connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      L13-18 (SLP) - L33-4 (SLP1) Always Below 1 Ω
      L33-4 (SLP1) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEERING LOCK ACTUATOR 

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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