For 1990-2009 cars

## DTC P0712 L61

### Circuit Description

The transaxle fluid temperature (TFT) sensor is a negative coefficient thermistor and is part of the transaxle fluid pressure (TFP) switch assembly. When the transmission fluid is cold, the sensor resistance is high and the PCM senses a high signal voltage. As the transmission fluid warms, the sensor resistance decreases and the PCM senses lower voltage. DTC P0712 sets when the TFT signal voltage at the PCM is below a calibrated value, over a calibrated temperature value.

### Conditions for Setting the DTC

DTC P0712 will set if the Trans. Fluid Temp. temperature is over 150°C (302°F), and the TFT sensor voltage is less than 0.33 volts when:

• | The condition exists for longer than 10 seconds.

• | Ignition 1 is between 8-18 volts with the ignition ON.

• | DTC P0713 has not set.

DTC P0712 is a type C DTC.

### Diagnostic Aids

Important: The PCM uses 2 internal circuits to identify the transaxle temperature. One circuit is used for temperatures of 48°C (118°F) and below. If either circuit has failed, the DTC will set, however the temperature may look normal in the other range.

Important: Test the low scale with the engine at room temperature and the high scale with the engine at normal operating temperature, above 70°C (158°F).

DTC P0712 is not set when the transaxle is overheated. That would cause DTC P0218 to set.

#### TFT Sensor - Temperature To Resistance - Approximate

°C | °F | Resistance (Ohms)
--- | --- | ---
0 | 32 | 7987-10859
10 | 50 | 4934-6407
20 | 68 | 3106-3923
30 | 86 | 1991-2483
40 | 104 | 1307-1611
50 | 122 | 878-1067
60 | 140 | 605-728
70 | 158 | 425-507
80 | 176 | 304-359
90 | 194 | 221-259
100 | 212 | 163-190

## DTC P0712 L81

### Circuit Description

The transaxle fluid temperature (TFT) sensor is a negative coefficient thermistor and is part of the transaxle fluid pressure (TFP) switch assembly. When the transmission fluid is cold, the sensor resistance is high and the TCM senses a high signal voltage. As the transmission fluid warms, the sensor resistance decreases and the TCM senses lower voltage. DTC P0712 sets when the TFT signal voltage at the TCM is below a calibrated voltage value, over a calibrated value.

### Conditions for Setting the DTC

DTC P0712 will set if the Trans. Fluid Temp. temperature is over 150°C (302°F) when:

• | The condition exists for longer than 5 seconds for MY 2002, and 10 seconds for MY 2003.

• | Engine speed is between 200-7,500 RPM for 5 seconds for MY 2002, and 500-7,500 RPM for 5 seconds for MY 2003.

• | Ignition 1 is between 8-18 volts for MY 2002.

DTC P0712 diagnostic runs continuously when the above conditions have been met.

DTC P0712 is a type C DTC.

### Diagnostic Aids

Important: The TCM uses 2 internal circuits to identify the transaxle temperature. One circuit is used for temperatures of 48°C (118°F) and below. If either circuit has failed, the DTC will set, however the temperature may look normal in the other range.

Important: Test the low scale with the engine at room temperature and the high scale with the engine at normal operating temperature, above 70°C (158°F).

DTC P0712 is not set when the transaxle is overheated. That would cause DTC P0218 to set.

#### TFT Sensor - Temperature To Resistance - Approximate

°C | °F | Resistance (Ohms)
--- | --- | ---
0 | 32 | 7987-10859
10 | 50 | 4934-6407
20 | 68 | 3106-3923
30 | 86 | 1991-2483
40 | 104 | 1307-1611
50 | 122 | 878-1067
60 | 140 | 605-728
70 | 158 | 425-507
80 | 176 | 304-359
90 | 194 | 221-259
100 | 212 | 163-190