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Home >> Chrysler >> 2001 >> Sebring LX, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Diagnosis - Automatic Transmission - Coupe) >> Automatic Transaxle Diagnosis >> Diagnostic Trouble Code Procedures >> DTC 16 (P0712): Transmission Fluid Temperature Sensor System (Short Circuit) >> Diagnosis

DTC 16 (P0712): Transmission Fluid Temperature Sensor System (Short Circuit): Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tool: 

  1. STEP 1. Using scan tool MB991502, check data list item 15: Transmission Fluid Temperature Sensor. 
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Connect scan tool MB991502 to the data link connector.
    2. Start the engine.
    3. Set scan tool MB991502 to data reading mode for item 15, Transmission Fluid Temperature Sensor.
      • When the engine is cool: Almost equal to the ambient temperature (atmospheric temperature)
        NOTE: Set scan tool MB991502 to data reading mode for item number 13, Intake Air Temperature (IAT) Sensor and note the temperature measurement. When the engine is cool, the temperature should be almost equal to the ambient temperature (atmospheric temperature), and the IAT sensor measurement should be approximately the same as the Transmission Fluid Temperature Sensor.
      • When the engine is warm: 70 to 80°C (158 to 176°F)
    4. Turn the ignition switch to the "LOCK" (OFF) position.
      Fig 1: Connecting Scan Tool MB991502 To Data Link Connector
      G04541904Courtesy of CHRYSLER CORP.

    Q: Is the sensor operating properly? 

    YES  : It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS .

    NO:  Go to Step 2.

  2. STEP 2. Measure the sensor output voltage at the A/T control solenoid valve assembly connector B-110 by backprobing. 
    1. Do not disconnect connector B-110.
    2. Turn the ignition switch to the "ON" position.
      Fig 2: Identifying A/T Control Solenoid Valve Assembly Connector B-110
      G04541905Courtesy of CHRYSLER CORP.
    3. Measure the voltage between terminal 1 and ground by backprobing.
      • When transmission fluid temperature is 20°C (68°F), voltage should measure between 3.8 and 4.0 volts.
      • When transmission fluid temperature is 40°C (104°F), voltage should measure between 3.2 and 3.4 volts.
      • When transmission fluid temperature is 80°C (176°F), voltage should measure between 1.7 and 1.9 volts.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the measured voltage within the specified range? 

    YES  : Go to  Step 6.

    NO:  Go to Step 3.

    Fig 3: Measuring Voltage Between Terminal 1 And Ground
    G04541906Courtesy of CHRYSLER CORP.
  3. STEP 3. Check A/T control solenoid valve assembly connector B-110 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    YES  : Go to Step 4.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 4: Locating A/T Control Solenoid Valve Assembly Connector B-110
    G04541907Courtesy of CHRYSLER CORP.
  4. STEP 4. Check the sensor output voltage at A/T control solenoid valve assembly connector B-110. 
    1. Disconnect connector B-110 and measure at the harness side.
    2. Turn the ignition switch to the "ON" position.
      Fig 5: Identifying A/T Control Solenoid Valve Assembly Connector B-110
      G04541908Courtesy of CHRYSLER CORP.
    3. Measure the voltage between terminal 1 and ground.
      • The voltage should measure between 4.5 and 4.9 volts.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the measured voltage between 4.5 and 4.9 volts? 

    YES  : Go to Step 5.

    NO:  Go to  Step 7.

    Fig 6: Measuring Voltage Between Terminal 1 And Ground
    G04541909Courtesy of CHRYSLER CORP.
  5. STEP 5. Check the transmission fluid temperature sensor at A/T control solenoid valve assembly connector B-110. 
    1. Disconnect connector B-110 and measure at the sensor side.
      Fig 7: Locating A/T Control Solenoid Valve Assembly Connector B-110
      G04541910Courtesy of CHRYSLER CORP.
    2. Measure the resistance between terminal 1 and 2.
      • When transmission fluid temperature is 0°C (32°F), resistance should be between 16.7 and 20.5 kΩ.
      • When transmission fluid temperature is 20°C (68°F), resistance should be between 7.3 and 8.9 kΩ.
      • When transmission fluid temperature is 40°C (104°F), resistance should be between 3.4 and 4.2 kΩ.
      • When transmission fluid temperature is 60°C (140°F), resistance should be between 1.9 and 2.2 kΩ.
      • When transmission fluid temperature is 80°C (176°F), resistance should be between 1.0 and 1.2 kΩ.
      • When transmission fluid temperature is 100°C (212°F), resistance should be between 0.57 and 0.69 kΩ.
        Fig 8: Measuring Resistance Between Terminal 1 And 2
        G04541911Courtesy of CHRYSLER CORP.

    Q: Is the measured resistance within the specified range? 

    YES  : Go to Step 6.

    NO:  Replace the transmission fluid temperature sensor. Refer to TRANSAXLE .

  6. STEP 6. Using scan tool MB991502, check data list item 15: Transmission Fluid Temperature Sensor. 
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
    1. Connect scan tool MB991502 to the data link connector.
    2. Start the engine.
    3. Set scan tool MB991502 to data reading mode for item 15, Transmission Fluid Temperature Sensor.
      • When the engine is cool: Almost equal to the ambient temperature (atmospheric temperature)
        NOTE: Set scan tool MB991502 to data reading mode for item number 13, Intake Air Temperature (IAT) Sensor and note the temperature measurement. When the engine is cool, the temperature should be almost equal to the ambient temperature (atmospheric temperature), and the IAT sensor measurement should be approximately the same as the Transmission Fluid Temperature Sensor.
      • When the engine is warm: 70 to 80°C (158 to 176°F)
    4. Turn the ignition switch to the "LOCK" (OFF) position.
      Fig 9: Connecting Scan Tool MB991502 To Data Link Connector
      G04541912Courtesy of CHRYSLER CORP.

    Q: Is the sensor operating properly? 

    YES  : It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS .

    NO:  Replace the PCM.

  7. STEP 7. Measure the sensor output voltage at PCM connector C-121 < 2.4L Engine > or C-123 < 3.0L Engine > by backprobing. 
    1. Do not disconnect connector C-121 < 2.4L Engine > or C-123 < 3.0L Engine >.
    2. Turn the ignition switch to the "ON" position.
      Fig 10: Locating PCM Connector C-121 Or C-123
      G04541913Courtesy of CHRYSLER CORP.
    3. Measure the voltage between terminal 124 and ground by backprobing.
      • When transmission fluid temperature is 20°C (68°F), voltage should measure between 3.8 and 4.0 volts.
      • When transmission fluid temperature is 40°C (104°F), voltage should measure between 3.2 and 3.4 volts.
      • When transmission fluid temperature is 80°C (176°F), voltage should measure between 1.7 and 1.9 volts.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the measured voltage within the specified range? 

    YES  : Go to Step 6.

    NO:  Go to  Step 8.

    Fig 11: Measuring Voltage Between Terminal 124 And Ground
    G04541914Courtesy of CHRYSLER CORP.
  8. STEP 8. Check PCM connector C-121 < 2.4L Engine > or C-123 < 3.0L Engine > for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    YES  : Go to Step 9.

    NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .

    Fig 12: Locating PCM Connector C-121 Or C-123
    G04541915Courtesy of CHRYSLER CORP.
  9. STEP 9. Check the harness for a short circuit to ground between A/T control solenoid valve connector B-110 terminal 1 and PCM connector C-121 < 2.4L Engine > or C-123 < 3.0L Engine > terminal 124. 

    Q: Is the harness wire in good condition? 

    YES  : Go to  Step 6.

    NO:  Repair or replace the harness wire.

    Fig 13: Locating A/T Control Solenoid Valve Connector B-110
    G04541916Courtesy of CHRYSLER CORP.
    Fig 14: Locating PCM Connector C-121 Or C-123
    G04541917Courtesy of CHRYSLER CORP.
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