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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Aisin (81-40LE) 🢒 DTC P0712

DTC P0712 Non European Emissions

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 1 occurrence of this detection. A/D value 10: 24 Mv
    • The TCM does not detect pass criteria achieved.

Action Taken When the DTC Sets
    • TCM will request the illumination of hold lamp and store DTC when TCM detects a failure on the first ignition cycle.
    • 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° and 150°C (302°F) for 10 seconds continuously.

Cause of Failure
    • Wiring harness or connector between TFT sensor and TCM
    • TFT sensor
    • TCM

Step

Action

Values

Yes

No

1
  1. Turn OFF the ignition.
  2. Install the scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. Select Store Freeze Frame/Failure Records from the Diagnostic Trouble Codes Information menu.
  5. Store Freeze Frame/Failure Records.
  6. Select Clear DTC Information from the Diagnostic Trouble Codes Information menu.
  7. Clear DTC Information.
  8. Perform 2 vehicle drive cycles.

Is the hold lamp ON?

--

Go to Step 2

Go to Step 4

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

Is DTC P0712 displayed?

--

Go to Step 3

Go to Step 4

3
  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 range?

10°C (50°F)

5.80-7.09K ohms

110°C (230°F)

0.231-0.263K ohms

Go to Step 5

Go to Step 6

4

Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .

Did you complete the repair?

--

System OK

--

5
  1. Estimate the failure of between the vehicle wiring harness connector and 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 7

Go to Step 4

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

Is the measurement within the specified range?

10°C (50°F)

5.80-7.09K ohms

110°C (230°F)

0.231-0.263K ohms

Go to Step 8

Go to Step 9

7
  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 1

System OK

8
  1. Estimate the failure of the vehicle wiring harness or between connectors.
  2. Test continuity and short circuit for the vehicle wiring harness and inspect the connection condition between transaxle harness connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 4

9
  1. Estimate the failure of the transmission harness connector wire or between connectors of TFT sensor.
  2. Inspect the fluid temperature. Refer to Transmission Fluid Temperature Sensor Inspection .

Is the problem found?

--

Go to Step 11

Go to Step 10

10
  1. Estimate the failure of the transmission harness Connector.
  2. Test 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 4

11

Replace the TFT sensor. Refer to Transmission Fluid Temperature Sensor Inspection

Did you complete the replacement?

--

System OK

--

DTC P0712 European Emissions

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 1 occurrence of this detection. A/D value 10: 24 Mv
    • The TCM does not detect pass criteria achieved.

Action Taken When the DTC Sets
    • TCM will request the illumination of malfunction indicator lamp (MIL) and store DTC when TCM detects a failure on the first ignition cycle.
    • 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 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°C and 150°C (32-302°F) for 10 seconds continuously.

Cause of Failure
    • Wiring harness or connector between TFT sensor and TCM
    • TFT sensor
    • TCM

Step

Action

Values

Yes

No

1
  1. Turn OFF the ignition.
  2. Install the scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. Select Store Freeze Frame/Failure Records from the Diagnostic Trouble Codes Information menu.
  5. Store Freeze Frame/Failure Records.
  6. Select Clear DTC Information from the Diagnostic Trouble Codes Information menu.
  7. Clear DTC Information.
  8. Perform 2 vehicle drive cycles.

Is the malfunction indicator lamp (MIL) lamp ON?

--

Go to Step 2

Go to Step 4

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

Is DTC P0712 displayed?

--

Go to Step 3

Go to Step 4

3
  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 range?

10°C (50°F)

5.80-7.09K ohms

110°C (230°F)

0.231-0.263K ohms

Go to Step 5

Go to Step 6

4

Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .

Did you complete the repair?

--

System OK

--

5
  1. Estimate the failure of between the vehicle wiring harness connector and 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 7

Go to Step 4

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

Is the measurement within the specified range?

10°C (50°F)

5.80-7.09K ohms

110°C (230°F)

0.231-0.263K ohms

Go to Step 8

Go to Step 9

7
  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 1

System OK

8
  1. Estimate the failure of the vehicle wiring harness or between connectors.
  2. Test continuity and short circuit for the vehicle wiring harness and inspect the connection condition between transaxle harness connectors. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 4

9
  1. Estimate the failure of the transmission harness connector wire or between connectors of TFT sensor.
  2. Inspect the fluid temperature. Refer to Transmission Fluid Temperature Sensor Inspection .

Is the problem found?

--

Go to Step 11

Go to Step 10

10
  1. Estimate the failure of the transmission harness Connector.
  2. Test 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 4

11

Replace the TFT sensor. Refer to Transmission Fluid Temperature Sensor Inspection

Did you complete the replacement?

--

System OK

--