For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptors

DTC P0711: Transmission Fluid Temperature (TFT) Sensor Performance
DTC P0712: Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage
DTC P0713: Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Signal | P0712 | P0712 | P0713 | P0711
Ground | P0712 | P0712 | P0713 | P0711

### Circuit/System Description

The transmission fluid temperature (TFT) sensor is installed directly in the transmission valve body (V/B). The TFT sensor input/output circuitry consists of an oil temperature sensor signal (-) (OTG), and an oil temperature sensor signal (+) (OT). The sensor converts the transmission oil temperature inside the transmission into an electrical signal and transmits it to the TCM.

### Conditions for Running the DTC

#### P0711

• | There are no transmission range switch DTCs, P0706, P0707, or P0708.

• | The transmission is not in Emergency Mode.

• | The transmission oil temperature is less than 20°C at initialization.

• | The transmission oil temperature is between 0-150°C.

• | The transmission range is D, L, or M.

• | The vehicle speed has been greater than 40 kmh at least once.

#### P0712

The transmission is not in Emergency Mode.

#### P0713

• | There is no engine coolant temperature DTC P1258.

• | The transmission is not in Emergency Mode.

• | The engine coolant temperature is greater than 50°C.

• | The drive time is greater than 900 seconds (15 minutes).

### Conditions for Setting the DTC

#### P0711

The TCM detects that the transmission oil temperature has not changed at least 1.5°C for 10 minutes.

#### P0712

The TCM detects that the transmission oil temperature is less than 1.5°C for 5 minutes.

#### P0713

The TCM detects that the transmission oil temperature is greater than 150°C for 12 seconds.

### Action Taken When the DTC Sets

• | DTC P0711, DTC P0712, and DTC P0713 are Type A DTCs.

• | The TCM will disable DTC P1719.

• | The TCM will default the transmission oil temperature to 30°C for 15 minutes, then to 111°C.

• | The TCM inhibits self learning and all adaptive control for 15 minutes.

### Conditions for Clearing the DTC

DTC P0711, DTC P0712, and DTC P0713 are Type A DTCs

### Reference Information

#### Schematic Reference

Automatic Transmission Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### DTC Type Reference

• | Diagnostic Trouble Code (DTC) Type Definitions

• | Diagnostic Trouble Code (DTC) List/Type

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool.
2. Record Freeze Frame and Failure Records.
3. Clear DTCs.
4. Operate the vehicle under the conditions observed in the Failure Records.
5. Observe the DTC information with the scan tool. Verify that DTC P0711, P0712, or P0713 does not set.

### Circuit/System Testing

1. Ignition OFF, disconnect the 22-way automatic transmission (AT) wiring harness connector (C2) at the TCM.
2. Ignition ON, at the TCM, test for 4.8-5.2 volts between the TFT sensor high signal circuit terminal 14 and low signal circuit terminal 13.

⇒ | If not within the specified range, replace the TCM, refer to Transmission Control Module Removal and Transmission Control Module Installation .

3. Verify the scan tool TCM, Trans. Fluid Temp. parameter is less than 11°C.

⇒ | If greater than the specified value, replace the TCM, refer to Transmission Control Module Removal and Transmission Control Module Installation .

4. Install a 3A fused jumper wire between the TFT sensor high signal circuit terminal 14 and low signal circuit terminal 13. Verify the scan tool TCM, Trans. Fluid Temp. parameter is greater than 109°C.

⇒ | If less than the specified value, replace the TCM, refer to Transmission Control Module Removal and Transmission Control Module Installation .

5. Ignition OFF, on the AT harness, test for 200-8000 ohms between the TFT sensor high signal circuit terminal 14 and low signal circuit terminal 13.

⇒ | If not within the specified range, replace AT wiring harness, refer to Wiring Harness Removal and Wiring Harness Installation .

⇒ | If all circuits test normal, test or replace the AT wiring harness, refer to Wiring Harness Removal and Wiring Harness Installation .

### Component Testing

#### Static Test

1. Ignition OFF, disconnect the 22-way automatic transmission (AT) wiring harness connector (C2) at the TCM.
2. Disconnect the automatic transmission (AT) wiring harness connectors at the valve body (V/B).
3. Place the TFT sensor in water with a temperature of 10°C. Test for 5.80-7.09K ohms between the TFT sensor high signal circuit terminal 14 and low signal circuit terminal 13.

⇒ | If not within the specified range, replace the AT wiring harness, refer to Wiring Harness Removal and Wiring Harness Installation .

4. Place the TFT sensor in water with a temperature of 110°C. Test for 0.231-0.263K ohms between the TFT sensor high signal circuit terminal 14 and low signal circuit terminal 13.

⇒ | If not within the specified range, replace the AT wiring harness, refer to Wiring Harness Removal and Wiring Harness Installation .

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.