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HOMESERVICE MANUALSLEXUS2007ES 350REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTHEADLIGHTSLIGHTINGLIGHTING SYSTEMAFS OFF SWITCH CIRCUITINSPECTION PROCEDURE
2007 Lexus ES 350

Inspection Procedure

2007 Lexus ES 350SECTION Inspection Procedure
  1. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the intelligent tester main switch on.
    4. Turn the clearance sonar main switch on.
    5. Select the item below in the DATA LIST, and read its value displayed on the intelligent tester.

      AFS (AFS ECU) 

      DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      AFS OFF SW AFS OFF switch signal ON / OFF ON: AFS OFF switch pushed (ON)
      OFF: AFS OFF switch not pushed (OFF)      		 -

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    NG: Go to next step. 

  2. INSPECT AFS OFF SWITCH 

    HINT:

    (See INSPECTION  )

    NG: REPLACE AFS OFF SWITCH 

    OK: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (AFS OFF SWITCH - AFS ECU AND BODY GROUND) 
    1. Disconnect the A22 AFS ECU connector.
    2. Disconnect the E5 AFS OFF switch connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      A22-32 (MSW) - E5-2 Always Below 1 Ω
      E5-1 - Body ground Always Below 1 Ω
      A22-32 (MSW) - Body ground Always Below 1 Ω
    Fig 1: Identifying E5 And A22 Connectors Terminals
    G05252367Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE AFS ECU 

RENDER: 1.0x

NO RELATED

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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.