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Home › Infiniti › 2007 › FX45 › Repair and Diagnosis › Transmission › Automatic Transmission › DTC P1710 A/T Fluid Temperature Sensor Circuit › Diagnostic Procedure

Diagnostic Procedure

  1. CHECK A/T FLUID TEMPERATURE SENSOR 1 SIGNAL 

    With CONSULT-II 

    1. Start engine.
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
    3. Read out the value of "ATF TEMP SE 1".
      4. Fig 1: Identifying CONSULT-II Display - DATA MONITOR
      G04900975Courtesy of NISSAN MOTOR CO., U.S.A.
    A/T FLUID TEMPERATURE SENSOR 1 SIGNAL

    Item name Condition °C (°F) Display value (Approx.)
    ATF TEMP SE 1 0 (32) - 20 (68) - 80 (176) 3.3 - 2.7 - 0.9 V

    OK or NG 

    OK:GO TO 2.

    NG: GO TO  3.

  2. CHECK A/T FLUID TEMPERATURE SENSOR 2 SIGNAL 

    With CONSULT-II 

    1. Start engine.
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
    3. Read out the value of "ATF TEMP SE 2".
      4. Fig 2: Identifying CONSULT-II Display - DATA MONITOR
      G04900975Courtesy of NISSAN MOTOR CO., U.S.A.
    A/T FLUID TEMPERATURE SENSOR 2 SIGNAL

    Item name Condition °C (°F) Display value (Approx.)
    ATF TEMP SE 2 0 (32) - 20 (68) - 80 (176) 3.3 - 2.5 - 0.7 V

    OK or NG 

    OK: GO TO  8.

    NG: GO TO  5.

  3. CHECK A/T FLUID TEMPERATURE SENSOR 1 

    Check A/T fluid temperature sensor 1. Refer to "A/T FLUID TEMPERATURE SENSOR 1 ".

    OK or NG 

    OK: GO TO 4.

    NG: Replace the control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".

  4. CHECK SUB-HARNESS 
    1. Disconnect park/neutral position switch connector and TCM connector.
    2. Check continuity between park/neutral position switch connector terminals and TCM connector terminals.
      Fig 3: Identifying Continuity Between Park/Neutral Connector Terminals And TCM Connector Terminals
      G04875866Courtesy of NISSAN MOTOR CO., U.S.A.
      PARK/NEUTRAL POSITION SWITCH AND TCM CONNECTOR TERMINALS

      Item Connector Terminal Continuity
      Park/neutral position switch connector F505 6 Yes
      TCM connector F503 19
      Park/neutral position switch connector F505 7 Yes
      TCM connector F503 18
    3. If OK, check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO  7.

    NG: Replace open circuit or short to ground and short to power in harness or connectors.

  5. CHECK A/T FLUID TEMPERATURE SENSOR 2 

    Check A/T fluid temperature sensor 2. Refer to "A/T FLUID TEMPERATURE SENSOR 2 ".

    OK or NG 

    OK: GO TO 6.

    NG: Replace the A/T fluid temperature sensor 2. Refer to "A/T FLUID TEMPERATURE SENSOR 2 REMOVAL AND INSTALLATION ".

  6. CHECK TERMINAL CORD ASSEMBLY 
    1. Disconnect A/T fluid temperature sensor 2 connector and TCM connector.
    2. Check continuity between A/T fluid temperature sensor 2 connector terminals and TCM connector terminals.
      Fig 4: Identifying Continuity Between A/T Fluid Temperature Sensor Connector Terminals And TCM Connector Terminals
      G04875867Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CORD ASSEMBLY

      Item Connector Terminal Continuity
      A/T fluid temperature sensor 2 connector F507 1 Yes
      TCM connector F502 3
      A/T fluid temperature sensor 2 connector F507 2 Yes
      TCM connector F502 5
    3. If OK, check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO 7.

    NG: Replace open circuit or short to ground and short to power in harness or connectors.

  7. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT 
    1. Check TCM power supply and ground circuit. Refer to "MAIN POWER SUPPLY AND GROUND CIRCUIT ".
    2. Reinstall any part removed.

    OK or NG 

    OK: Replace the control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".

    NG: Repair or replace damaged parts.

  8. CHECK DTC 

    Perform "DTC CONFIRMATION PROCEDURE ".

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO  1.

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