Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> DTC P0872 Transmission Fluid Pressure Sensor / Switch "C" Circuit Low >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF DATA LIST (TPS 1 SW SIGNAL) 
    Fig 1: Checking Value Of Data List (TPS 1 SW Signal)
    G04948341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect terminals TPS1 and E1 of the E5 and E6 TCM connector.

      HINT:

      Before checking, do visual and contact pressure checks on the TCM connector.

    2. Connect the intelligent tester or Techstream to the DLC3.
    3. Turn the engine switch on (IG) and push the tester main switch ON.
    4. Enter the following menus:
      1. Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / ECT / DATA LIST.
      2. Techstream - Select: Powertrain / ECT / Data List.
    5. Read the value displayed on the tester.

      Result 

      Intelligent tester 

      RESULT CHART

      Tester Display Proceed to
      TPS 1 SW OFF A
      TPS 1 SW ON B

      Techstream 

      TESTER DISPLAY REFERENCE

      Tester Display Proceed to
      TPS 1 Switch OFF A
      TPS 1 Switch ON B

    B: Go to step   3 

    A: GO TO NEXT STEP 

  2. REPLACE TCM 
    1. Replace the TCM (see REMOVAL  ).

    NEXT 

    PERFORM AT REGISTRATION (See  REGISTRATION   ) 

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) 
    Fig 2: Checking Harness And Connector (Transmission Wire - TCM)
    G04948342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E50 transmission wire connector.
    2. Disconnect the E6 TCM connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E50-17 (TPS1) - E6-25 (TPS1) Always Below 1 Ω
      E50-17(TPS1)or E6-25 (TPS1) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  4. INSPECT TRANSMISSION WIRE (OIL PRESSURE SWITCH) 
    Fig 3: Checking Transmission Wire (Oil Pressure Switch)
    G04948343Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the oil pressure switch connector.
    2. Disconnect the E50 transmission wire connector.
    3. Measure the resistance of the transmission wire.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      Oil pressure switch connector-17 (TPS1) Always Below 1 Ω
      Oil pressure switch connector or 17 (TPS1) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE TRANSMISSION WIRE (See  REMOVAL   ) 

    OK: REPLACE OIL PRESSURE SWITCH (See  DISASSEMBLY   )