For 1990-2009 cars

## DTC P0712 Non European or N. American Emissions

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

### Conditions for Setting the DTC

• | The transmission control module (TCM) detects that the analog-to-digital (A/D) value of the transmission fluid temperature (TFT) sensor signal is less than 10 for 5 minutes continuously after one occurrence of this detection. A/D value 10: 24 Mv

• | The TCM does not detect pass criteria achieved.

### Action Taken When the DTC Sets

• | The TCM will request the illumination of the hold lamp and store the DTC when the TCM detects a failure on the first ignition cycle.

• | The TCM judges the temperature of the transmission fluid is 200°C (392°F).

• | No lockup control

• | No 4th gear

• | No self-learning control

• | No timing solenoid control N-D

### Conditions for Clearing the DTC

• | The TCM turns OFF the hold lamp when no further failures are detected on the next ignition cycles.

• | The scan tool can clear the DTC from the TCM history.

• | The TCM clears the DTC from the TCM history memory after 40 consecutive ignition cycles without fault.

• | The TCM detects the temperature of the transmission fluid is between 0-150°C (32-302°F) for 10 seconds continuously.

### Cause of Failure

• | The wiring harness or connector between the TFT sensor and the TCM

• | The TFT sensor

• | The TCM

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Diagnostic System Check - Automatic Transmission? | -- | Go to Step 2 | Go to Diagnostic System Check - Automatic Transmission
2 |

1. Turn OFF the ignition.
2. Install the scan tool.
3. With the engine OFF, turn the ignition switch to the ON position.
4. Select Store Freeze Frame/Failure Records from the DTC Information menu.
5. Store Freeze Frame/Failure Records.
6. Select Clear DTC Information from the DTC Information menu.
7. Clear the DTC information.
8. Perform 2 vehicle drive cycles.

Is the hold lamp ON?

--

Go to Step 3

Go to Step 5

3 |

1. Select Request DTC by Status from the DTC Information menu.
2. Request the DTC by Status.

Is DTC P0712 displayed?

--

Go to Step 4

Go to Step 5

4 |

1. Turn OFF the ignition.
2. Measure the resistance between the vehicle harness and the transmission fluid temperature (TFT) sensor. Refer to Transmission Fluid Temperature Sensor Inspection .
3. Disconnect the transmission control module (TCM) connector and measure the resistance between terminal A11 and A12.

Is the measurement within the specified values?

10°C (50°F)

5.80-7.09 KΩ

110°C (230°F)

0.231-0.263 KΩ

Go to Step 6

Go to Step 7

5 | Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis . Did you complete the repair? | -- | System OK | --
6 |

1. Inspect for damage between the vehicle wiring harness connector and the TCM.
2. Inspect the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .
3. Inspect the connection condition between the connector.

Is the connection condition OK?

--

Go to Step 8

Go to Step 5

7 |

1. Inspect for damage between the vehicle harness and the TFT sensor.
2. Disconnect the transaxle harness connector of the T/M wire and inspect the resistance between the TFT sensor connector terminal 1 and 6.

Is the measurement within the specified values?

10°C (50°F)

5.80-7.09 KΩ

110°C (230°F)

0.231-0.263 KΩ

Go to Step 9

Go to Step 10

8 |

1. Replace the TCM. Refer to Transmission Control Module Replacement .
2. Perform the reproducing test under user condition after confirming no DTC.

Is DTC displayed?

--

Go to Step 2

System OK

9 |

1. Inspect for damage of the vehicle wiring harness or between the connectors.
2. Test the continuity and short circuit for the vehicle wiring harness and inspect the connection condition between the transaxle harness connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 5

10 |

1. Inspect for damage of the transmission harness connector wire or between connectors of the TFT sensor.
2. Inspect the fluid temperature. Refer to Transmission Fluid Temperature Sensor Inspection .

Is the condition found?

--

Go to Step 12

Go to Step 11

11 |

1. Inspect for damage of the transmission harness connector.
2. Test the continuity and short circuit for the transmission harness connector and inspect the connection condition between the connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 5

12 | Replace the TFT sensor. Refer to Transmission Fluid Temperature Sensor Inspection . Did you complete the replacement? | -- | System OK | --

## DTC P0712 European and N. American Emissions

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

### Conditions for Setting the DTC

• | The transmission control module (TCM) detects that the analog-to-digital (A/D) value of the transmission fluid temperature (TFT) sensor signal is less than 10 for 5 minutes continuously after one occurrence of this detection. A/D value 10: 24 Mv

• | The TCM does not detect pass criteria achieved.

### Action Taken When the DTC Sets

• | The TCM will request the illumination of malfunction indicator lamp (MIL) and store the DTC when the TCM detects a failure on the first ignition cycle.

• | The TCM judges the temperature of the transmission fluid is 200°C (392°F).

• | No lockup control

• | No 4th gear

• | No self-learning control

• | No timing solenoid control N-D

### Conditions for Clearing the DTC

• | The TCM turns OFF the MIL when no further failures are detected on the next ignition cycles.

• | The scan tool can clear the DTC from the TCM history.

• | The TCM clears the DTC from the TCM history memory after 40 consecutive ignition cycles without fault.

• | The TCM detects the temperature of the transmission fluid is between 0-150°C (32-302°F) for 10 seconds continuously.

### Cause of Failure

• | The wiring harness or the connector between the TFT sensor and the TCM

• | The TFT sensor

• | The TCM

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Diagnostic System Check - Automatic Transmission? | -- | Go to Step 2 | Go to Diagnostic System Check - Automatic Transmission
2 |

1. Turn OFF the ignition.
2. Install the scan tool.
3. With the engine OFF, turn the ignition switch to the ON position.
4. Select Store Freeze Frame/Failure Records from the DTC Information menu.
5. Store Freeze Frame/Failure Records.
6. Select Clear DTC Information from the DTC Information menu.
7. Clear the DTC information.
8. Perform 2 vehicle drive cycles.

Is the malfunction indicator lamp (MIL) ON?

--

Go to Step 3

Go to Step 5

3 |

1. Select Request DTC by Status from the DTC Information menu.
2. Request DTC by Status.

Is DTC P0712 displayed?

--

Go to Step 4

Go to Step 5

4 |

1. Turn OFF the ignition.
2. Measure the resistance between the vehicle harness and transmission fluid temperature (TFT) sensor. Refer to Transmission Fluid Temperature Sensor Inspection .
3. Disconnect the transmission control module (TCM) connector and measure the resistance between terminal A11 and A12.

Is the measurement within the specified values?

10°C (50°F)

5.80-7.09 KΩ

110°C (230°F)

0.231-0.263 KΩ

Go to Step 6

Go to Step 7

5 | Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis . Did you complete the repair? | -- | System OK | --
6 |

1. Inspect for damage between the vehicle wiring harness connector and the TCM.
2. Inspect the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .
3. Inspect the connection condition between the connector.

Is the connection condition OK?

--

Go to Step 8

Go to Step 5

7 |

1. Inspect for damage between the vehicle harness and the TFT sensor.
2. Disconnect the transaxle harness connector of the T/M wire and inspect the resistance between the TFT sensor connector terminal 1 and 6.

Is the measurement within the specified values?

10°C (50°F)

5.80-7.09 KΩ

110°C (230°F)

0.231-0.263 KΩ

Go to Step 9

Go to Step 10

8 |

1. Replace the TCM. Refer to Transmission Control Module Replacement .
2. Perform the reproducing test under user condition after confirming no DTC.

Is DTC displayed?

--

Go to Step 2

System OK

9 |

1. Inspect for damage of the vehicle wiring harness or between the connectors.
2. Test the continuity and short circuit for the vehicle wiring harness and inspect the connection condition between the transaxle harness connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 5

10 |

1. Inspect for damage of the transmission harness connector wire or between the connectors of the TFT sensor.
2. Inspect the fluid temperature. Refer to Transmission Fluid Temperature Sensor Inspection .

Is the condition found?

--

Go to Step 12

Go to Step 11

11 |

1. Inspect for damage of the transmission harness connector.
2. Test the continuity and short circuit for the transmission harness connector and inspect the connection condition between connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 5

12 | Replace the TFT sensor. Refer to Transmission Fluid Temperature Sensor Replacement . Did you complete the replacement? | -- | System OK | --