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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1207 (Automatic Transmission) >> DTC P1710: A/T Fluid Temperature Sensor Circuit >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  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".
      ATF TEMP SE 1 DISPLAY VALUE TABLE

      Item name Condition °C (°F) Display value (Approx.)
      ATF TEMP SE 1 0 (32) - 20 (68) - 80 (176) 2.2 - 1.8 - 0.6 V
      Fig 1: Display DATA MONITOR Mode Screen (A/T Fluid Temperature Sensor 1 Signal)
      G02382408Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 2.
    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".
      ATF TEMP SE 2 DISPLAY VALUE TABLE

      Item name Condition °C (°F) Display value (Approx.)
      ATF TEMP SE 1 0 (32) - 20 (68) - 80 (176) 2.2 - 1.7 - 0.45 V
      Fig 2: Display DATA MONITOR Mode Screen (A/T Fluid Temperature Sensor 2 Signal)
      G02382409Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  8.
    2. 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 

    1. OK: GO TO 4.
    2. 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: Park/Neutral Position Switch Connector Terminals And TCM Connector Terminals Continuity Chart
      G02382410Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 4: Checking Continuity Between Park/Neutral Position Switch Connector Terminals & TCM Connector Terminals
      G02382411Courtesy of NISSAN MOTOR CO., U.S.A.
    3. If OK, check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  7.
    2. 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 

    1. OK: GO TO 6.
    2. 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 5: A/T Fluid Temperature Sensor 2 Connector Terminals & TCM Connector Terminals Continuity Chart
      G02382412Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 6: Checking Continuity Between A/T Fluid Temperature Sensor 2 Connector Terminals & TCM Connector Terminals
      G02382413Courtesy of NISSAN MOTOR CO., U.S.A.
    3. If OK, check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO 7.
    2. 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 

    1. OK: Replace the control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
    2. NG: Repair or replace damaged parts.
  8. CHECK DTC 

    Perform "DTC Confirmation Procedure".

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: GO TO  1.