LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> ES 350 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transaxle System >> Park / Neutral Position Switch Circuit >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. DATA LIST 

    HINT:

    According to the DATA LIST displayed on the intelligent tester, you can read the value of switches, sensors, actuators and other items without removing any parts. Reading the DATA LIST as the first step in troubleshooting is one method to save labor time.

    NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty.
    1. Warm up the engine.
    2. Turn the engine switch off.
    3. Connect the intelligent tester together with the CAN VIM (Controller Area Network Vehicle Interface Module) to the DLC3.
    4. Turn the engine switch on (IG).
    5. Turn on the tester.
    6. Enter the following items: "DIAGNOSIS / OBD / MOBD / ECT / DATA LIST".
    7. According to the display on the tester, read "DATA LIST".
      DATA LIST

      Item Measurement Item/Range (display) Normal Condition Diagnostic Note
      PNP SW [NSW] PNP Switch Status/ ON or OFF Shift lever position is; P and N: ON Except P and N: OFF When the shift lever position displayed on the intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.
      REVERSE PNP Switch Status/ ON or OFF Shift lever position is; R: ON Except R: OFF When the shift lever position displayed on the intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.
      PARKING PNP Switch Status/ ON or OFF Shift lever position is; P: ON Except P: OFF When the shift lever position displayed on the intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.
      NEUTRAL PNP Switch Status/ ON or OFF Shift lever position is; N: ON Except N: OFF When the shift lever position displayed on the intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.
      DRIVE PNP Switch Status/ ON or OFF Shift lever position is; D and S: ON Except D and S: OFF When the shift lever position displayed on the intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.
      MODE SELECT SW Sport Mode Select Switch Status/ ON or OFF Shift lever position is; S, "+" and"-": ON Except S, "+" and "-": OFF -
  1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Disconnect the park/neutral position switch connector.
    2. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Shift Position Tester Connection Specified Condition
      P 1 - 3 and 4 - 9 Below 1 Ω
      Except P 10 kΩ or higher
      R 1 - 2 Below 1 Ω
      Except R 10 kΩ or higher
      N 1 - 8 and 4 - 9 Below 1 Ω
      Except N 10 kΩ or higher
      D, S, "+" and "-" 1 -7 Below 1 Ω
      Except D, S, "+11 and "-" 10 kΩ or higher
    Fig 1: Identifying Park/Neutral Position Switch Connector Terminals
    G05249460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

    OK: Go to Next Step 

  2. INSPECT TRANSMISSION CONTROL SWITCH 
    1. Connect the park/neutral position switch connector.
    2. Disconnect the transmission control switch connector of the shift lock control unit assembly.
    3. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Shift Position Tester Connection Specified Condition
      S, "+" and "-" 3-7 Below 1 Ω
      Except S, "+" and "-" 10 kΩ or higher
    Fig 2: Inspecting Transmission Control Switch
    G04976631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE TRANSMISSION CONTROL SWITCH 

    OK: Go to Next Step 

  3. CHECK ECU TERMINAL VOLTAGE (STA TERMINAL) 
    1. Connect the transmission control switch connector of the shift lock control unit assembly.
    2. Measure the voltage according to the value(s) in the table below while cranking the engine.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Specified Condition
      STA (B40-10) - Body ground 9 to 14 V
    Fig 3: TCM Connector Terminal Identification
    G05249541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TCM - ECM) 

    OK: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - TCM) 
    1. Disconnect the TCM connector.
    2. Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Shift Position Tester Connection Specified Condition
      R R (B40-15) - Body ground 10 to 14 V*
      Except R Below 1 V
      D D (B40-16) - Body ground 10 to 14 V
      Except D Below 1 V
      HINT:
      *: The voltage will drop slightly because the back up light is turned on.
      Fig 4: TCM Connector Terminal Identification
      G05249542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - TCM) 

    OK: REPLACE TCM