Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Automatic Transmission System >> DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) >> Inspection Procedure

Inspection Procedure

  1. DATA LIST 

    HINT:

    Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic 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 or not.
    1. Warm up the engine.
    2. Turn the engine switch off.
    3. Connect the Techstream to the DLC3.
    4. Turn the engine switch on (IG).
    5. Turn the Techstream on.
    6. Enter the following menus: Powertrain / Engine and ECT / Data List.
    7. According to the display on the Techstream, read the Data List.

    Engine and ECT 

    MEASUREMENT ITEM/RANGE AND DIAGNOSTIC NOTE

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    Neutral Position SW Signal PNP switch status/ ON or OFF Shift lever:
    • In P or N: ON
    • Not in P or N: OFF
    		 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the PNP switch or shift cable may be incorrect.
    Shift SW Status (R Range) PNP switch status/ ON or OFF Shift lever:
    • In R: ON
    • Not in R: OFF
    		 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the PNP switch or shift cable may be incorrect.
    Shift SW Status (P Range) PNP switch status/ ON or OFF Shift lever:
    • In P: ON
    • Not in P: OFF
    		 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the PNP switch or shift cable may be incorrect.
    Shift SW Status (N Range) PNP switch status/ ON or OFF Shift lever:
    • In N: ON
    • Not in N: OFF
    		 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the PNP switch or shift cable may be incorrect.
    Shift SW Status (D Range) PNP switch status/ ON or OFF Shift lever:
    • In D: ON
    • Not in D: OFF
    		 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the PNP switch or shift cable may be incorrect.
    Sports Shift Up SW Sport shift up switch status/ ON or OFF
    • ON: Shift lever held in "+" (up-shift)
    • OFF: Shift lever not held in "+" (up-shift)
    		 -
    Sports Shift Down SW Sport shift down switch status/ ON or OFF
    • ON: Shift lever held in "-" (down-shift)
    • OFF: Shift lever not held in"-" (down-shift)
    		 -
    Sports Mode Selection SW Sport mode select switch status/ ON or OFF Shift lever:
    • ON: In S,"+" or "-"
    • OFF: Not in S,"+" or "-"
    		 -
    1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
      1. Disconnect the C19 park/neutral position switch connector.
      2. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying C19 Connector Terminals
      G05628959Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      • 2 (RB) - 6 (PL)
      • 4 (B) - 5 (L)
      		 Shift lever in P Below 1 Ω
      2 (RB) - 1 (RL) Shift lever in R Below 1 Ω
      • 2 (RB) - 9 (NL)
      • 4 (B) - 5 (L)
      		 Shift lever in N Below 1 Ω
      2 (RB) - 7 (DL)
      • Shift lever in D
      • Shift lever in S, "+" or "-"
      		 Below 1 Ω
      • 2 (RB) - 6 (PL)
      • 4 (B) - 5 (L)
      		 Shift lever not in P 10 kΩ or higher
      2 (RB) - 1 (RL) Shift lever not in R 10 kΩ or higher
      • 2 (RB) - 9 (NL)
      • 4 (B) - 5 (L)
      		 Shift lever not in N 10 kΩ or higher
      2 (RB) - 7 (DL)
      • Shift lever not in D
      • Shift lever not in S, "+" or "-"
      		 10 kΩ or higher

      NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY  (See ON-VEHICLE INSPECTION )

      OK: Go to next step 

    2. INSPECT TRANSMISSION CONTROL SWITCH 
      1. Disconnect the E52 transmission control switch connector.
      2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      3 (IG) - 7 (S) Shift lever in S, "+" or "-" Below 1 Ω
      3 (IG) - 7 (S) Shift lever not in S, "+" or "-" 10 kΩ or higher

      NG: REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)  (See REMOVAL )

      Fig 2: Identifying E52 Connector Terminals
      G05154692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

    3. CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (POWER SOURCE) 
      1. Disconnect the C19 park/neutral position switch connector.
      2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      C19-2 (RB) - Body ground Engine switch on (IG) 11 to 14 V
      C19-2 (RB) - Body ground Engine switch off Below 1 V

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

      Fig 3: Identifying C19 Connector Terminals
      G05628961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

    4. CHECK TRANSMISSION CONTROL SWITCH (POWER SOURCE) 
      1. Disconnect the E52 transmission control switch connector.
      2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      E52-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      E52-3 (IG) - Body ground Engine switch off Below 1 V
      Fig 4: Identifying E52 Connector Terminals
      G05628962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - ENGINE SWITCH) 

      OK: Go to next step 

    5. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) 
      1. Disconnect the C53 ECM connector.
      2. Measure the voltage according to the value(s) in the table below.
      Fig 5: Identifying C53 Connector Terminals
      G05628963Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage 

      STANDARD VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      • C53-2 (P) - Body ground
      • C53-120 (NSW) - Body ground
      • Engine switch on (IG)
      • Shift lever in P
      		 11 to 14 V
      C53-26 (R) - Body ground
      • Engine switch on (IG)
      • Shift lever in R
      		 11 to 14 V*
      • C53-25 (N) - Body ground
      • C53-120 (NSW) - Body ground
      • Engine switch on (IG)
      • Shift lever in N
      		 11 to 14 V
      C53-27 (D) - Body ground
      • Engine switch on (IG)
      • Shift lever in D
      		 11 to 14 V
      • C53-2 (P) - Body ground
      • C53-120 (NSW) - Body ground
      • Engine switch on (IG)
      • Shift lever not in P
      		 Below 1 V
      C53-26 (R) - Body ground
      • Engine switch on (IG)
      • Shift lever not in R
      		 Below 1 V
      • C53-25 (N) - Body ground
      • C53-120 (NSW) - Body ground
      • Engine switch on (IG)
      • Shift lever not in N
      		 Below 1 V
      C53-27 (D) - Body ground
      • Engine switch on (IG)
      • Shift lever not in D
      		 Below 1 V

      HINT:

      *: The voltage will drop slightly due to the turning on of the back up light.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

    6. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM) 
      1. Disconnect the A38 ECM connector.
      2. Measure the voltage according to the value(s) in the table below.

    Standard Voltage 

    STANDARD VOLTAGE SPECIFICATION

    Tester Connection Condition Specified Condition
    A38-25 (S) - Body ground
    • Engine switch on (IG)
    • Shift lever in S, "+" or "-"
    		 11 to 14 V
    A38-25 (S) - Body ground
    • Engine switch on (IG)
    • Shift lever not in S, "+" or "-"
    		 Below 1 V
    Fig 6: Identifying A38 Connector Terminals
    G05628964Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM  (See ECM )

scientia non olet · About Mike's Workshop Manuals