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Home >> Scion >> 2012 >> iQ >> Repair and Diagnosis >> Transmission >> Automatic Trans >> CVT Transaxle (Diagnostic Codes) >> Continuously Variable Transaxle System >> DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) >> Procedure

DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input): Procedure

  1. READ VALUE USING TECHSTREAM (NEUTRAL POSITION SW SIGNAL AND SHIFT SW STATUS) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Data List.
    5. In accordance with the display on the Techstream, read the Data List.
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Neutral Position SW Signal PNP switch status/
      ON or OFF      		 Shift lever position;
      P or N: ON
      Except P and N: OFF      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect.
      Shift SW Status (R Range) PNP switch status/
      ON or OFF      		 Shift lever position;
      R: ON
      Except R: OFF
      Shift SW Status (P Range) PNP switch status/
      ON or OFF      		 Shift lever position;
      P: ON
      Except P: OFF
      Shift SW Status (N Range) PNP switch status/
      ON or OFF      		 Shift lever position;
      N: ON
      Except N: OFF
      Shift SW Status (D Range) PNP switch status/
      ON or OFF      		 Shift lever position;
      D or S: ON
      Except D and S: OFF
      Shift SW Status (B Range) PNP switch status/
      ON or OFF      		 Shift lever position;
      B: ON
      Except B: OFF
      RESULT

      Result Proceed to
      Data display is within Normal Condition range A
      Data display is not within Normal Condition range B

    B → See step   7 

    A: Go to next step 

  2. READ VALUE USING TECHSTREAM (SD SWITCH) 
    1. Enter the following menus: Powertrain / Engine and ECT / Data List.
    2. In accordance with the display on the Techstream, read the Data List.
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SD Switch Transmission control switch status/
      ON or OFF      		 Shift lever position;
      S: ON
      Except S: OFF      		 -
      RESULT

      Result Proceed to
      Data display is within Normal Condition range A
      Data display is not within Normal Condition range B

    B → See step   3 

    A → See step   12 

  3. INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH) 
    1. Disconnect the transmission control switch connector of the shift lock control unit assembly.
      Fig 1: Identifying Transmission Control Switch Connector Terminals
      GTY345073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (NSSD) - 2 (AT3) Shift lever in S Below 1 Ω
      Shift lever in D 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Transmission control unit assembly (Transmission control switch))

    NG → See step   13 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM) 
    1. Disconnect the ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D55-1 (NSSD) - A18-47 (D) Always Below 1 Ω
      D55-2 (AT3) - A18-26 (SDSW) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. REPLACE ECM 
    1. Replace the ECM. Refer to REMOVAL .

    NEXT: Go to next step 

  6. PERFORM INITIALIZATION 
    1. Perform the initialization. Refer to INITIALIZATION .
    2. Check for DTCs again. Refer to DTC CHECK / CLEAR .

    NEXT → END 

  7. CHECK HARNESS AND CONNECTOR (BATTERY - PARK/NEUTRAL POSITION SWITCH) 
    1. Disconnect the park/neutral position switch connector.
      Fig 2: Identifying Park/Neutral Position Switch Connector Terminals
      GTY346566Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      B13-2 (RB) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Park/Neutral Position Switch)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  8. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Disconnect the park/neutral position switch connector.
      Fig 3: Identifying Park/Neutral Position Switch Connector Terminals
      GTY345754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (B) - 5 (L) Shift lever in P or N Below 1 Ω
      Shift lever not in P and N 10 kΩ or higher
      2 (RB) - 6 (PL) Shift lever in P Below 1 Ω
      Shift lever not in P 10 kΩ or higher
      1 (RL) - 2 (RB) Shift lever in R Below 1 Ω
      Shift lever not in R 10 kΩ or higher
      2 (RB) - 9 (NL) Shift lever in N Below 1 Ω
      Shift lever not in N 10 kΩ or higher
      2 (RB) - 7 (DL) Shift lever in D or S Below 1 Ω
      Shift lever not in D and S 10 kΩ or higher
      2 (RB) - 3 (2L) Shift lever in B Below 1 Ω
      Shift lever not in B 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Park/Neutral Position Switch)

    NG → See step   14 

    OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) 
    1. Disconnect the ECM connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B13-1 (RL) - B8-76 (R) Always Below 1 Ω
      B13-3 (2L) - B8-39 (B) Always Below 1 Ω
      B13-4 (B) - A18-25 (NSW) Always Below 1 Ω
      B13-6 (PL) - B8-77 (P) Always Below 1 Ω
      B13-7 (DL) - A18-47 (D) Always Below 1 Ω
      B13-9 (NL) - B8-99 (N) Always Below 1 Ω
      A18-25 (NSW) - Body ground Always 10 kΩ or higher
      B8-39 (B) - Body ground Always 10 kΩ or higher
      A18-47 (D) - Body ground Always 10 kΩ or higher
      B8-99 (N) - Body ground Always 10 kΩ or higher
      B8-76 (R) - Body ground Always 10 kΩ or higher
      B8-77 (P) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  10. REPLACE ECM 
    1. Replace the ECM. Refer to REMOVAL .

    NEXT: Go to next step 

  11. PERFORM INITIALIZATION 
    1. Perform the initialization. Refer to INITIALIZATION .
    2. Check for DTCs again. Refer to INITIALIZATION .

    NEXT → END 

  12. CHECK FOR INTERMITTENT PROBLEMS. Refer to  ELECTRONIC CIRCUIT INSPECTION PROCEDURE 
  13. REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY. Refer to  REMOVAL 
  14. REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to  REMOVAL 
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