LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> DTC B1495/95 Rear Diffuse Servo Motor Circuit >> Inspection Procedure

Inspection Procedure

NOTE:
  • If this DTC is output, perform the following procedures before beginning the INSPECTION PROCEDURE.
    1. Turn the engine switch off, and wait approximately 90 seconds.
    2. Turn the engine switch on (IG).
    3. Clear DTCs (see DTC CHECK / CLEAR  ).
    4. Check for DTCs (see DTC CHECK / CLEAR  ). If this DTC is not output, there is no malfunction. If this DTC is output, perform the INSPECTION PROCEDURE below.
  1. READ VALUE OF INTELLIGENT TESTER OR TECHSTREAM (REAR EXHAUST MODE SERVO MOTOR TARGET PULSE (for Diffusion)) 
    1. Use the Data List to check if the servo motor is functioning properly.
      1. Intelligent tester

        AIR CONDITIONER 

        INTELLIGENT TESTER - AIR CONDITIONER REFERENCE CHART

        Tester Display Measurement Item / Range Normal Condition Diagnostic Note
        DIFFUSE PLS R Rear exhaust mode servo motor target pulse (for diffusion)/
        Min.: 0, Max.: 255        		 Customized value will be displayed -
      2. Techstream

        Air conditioner 

        TECHSTREAM - AIR CONDITIONER REFERENCE CHART

        Tester Display Measurement Item / Range Normal Condition Diagnostic Note
        Diffuse Target Pulse (R) Rear exhaust mode servo motor target pulse (for diffusion)/
        Min.: 0, Max.: 255        		 Customized value will be displayed -

        OK: The display is as specified in the normal condition. 

        Result 

        RESULT CHART

        Result Proceed to
        OK (Checking from the DTC) A
        OK (Checking from the PROBLEM SYMPTOMS TABLE) B
        NG C

    B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

    C: REPLACE AIR CONDITIONING AMPLIFIER (See  REMOVAL   ) 

    A: GO TO NEXT STEP 

  2. CHECK HARNESS AND CONNECTOR (REAR AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER) 
    Fig 1: Checking Harness And Connector (Rear Air Conditioning Harness - Air Conditioning Amplifier)
    G04950424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S28 rear air conditioning harness connector.
    2. Disconnect the L76 air conditioning amplifier connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      REAR AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER

      Tester Connection Condition Specified Condition
      S28-6 (BRRG) - L76-12 (BRRG) Always Below 1 Ω
      S28-7(BURR)-L76-13 (BURR) Always Below 1 Ω
      S28-8(BRRB)-L76-14 (BRRB) Always Below 1 Ω
      L76-12 (BRRG) - Body ground Always 10 kΩ or higher
      L76-13 (BURR)-Body ground Always 10 kΩ or higher
      L76-14 (BRRB) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  3. REPLACE REAR EXHAUST SERVO MOTOR (for Diffusion) 

    HINT:

    Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a normal one and check that the condition returns to normal (see REMOVAL  ).

    OK: Same problem does not occur. 

    NG: REPLACE REAR AIR CONDITIONING HARNESS (See  REMOVAL   ) 

    OK: END 

scientia non olet · About LEMON Manuals