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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Aisin (81-40LE) 🢒 DTC P0722

DTC P0722 Non European Emissions

Conditions for Setting the DTC
    • This DTC detects no signal of output shaft speed (OSS) sensor circuit for a long period of time. The revolution is 0-10,000 RPM.
    • The transmission control module (TCM) detects no pulse of OSS sensor while the TCM detects 178 pulses of input shaft speed (ISS) sensor. This detection 500 times continuously.
    • D,2,L range selected
    • The input speed is 5 km/h (3 mph) or greater.
    • DTCs P0751, P0753, P0756, P0758, and P0717 are not set.
    • 25 seconds later after Neutral (N) to Drive (D) shift

Action Taken When the DTC Sets
    • TCM will request the illumination of the hold lamp and store DTC when TCM detects a failure on the first ignition cycle
    • No lockup control
    • No engine torque reduction control
    • No engagement pressure control
    • No 4th gear
    • No self-learning control
    • No prevent reverse gear control

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 250 pulses of OSS sensor while failure detection is not achieved.

Cause of Failure
    • Wiring harness or connector between OSS sensor and TCM
    • OSS 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 P0722 displayed?

--

Go to Step 3

Go to Step 4

3
  1. Turn OFF the ignition.
  2. Inspect the voltage between vehicle harness and the output shaft speed (OSS) sensor.
  3. Disconnect the transmission control module (TCM) connector of the vehicle harness.
  4. Connect the voltmeter to monitor the voltage between terminal B25 and ground.
  5. Turn ON the ignition and lift up the vehicle.
  6. Measure the voltage change when the wheel is turned slowly.

Is the voltage change within the specified value?

0-12 V

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 connectors.

Is the connection condition OK?

--

Go to Step 7

Go to Step 4

6
  1. Estimate the failure of transaxle harness or between the connectors of OSS sensor.
  2. Inspect the OSS sensor.

Is the condition of the OSS sensor OK?

--

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 transaxle harness.
  2. Test continuity and short circuit for the T/M wire and inspect the connection condition between connectors C-4. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 4

9

Replace the OSS. Refer to Output Speed Sensor Replacement .

Is the replacement complete?

--

System OK

--

DTC P0722 European Emissions

Conditions for Setting the DTC
    • This DTC detects no signal of output shaft speed (OSS) sensor circuit for a long period of time. The revolution is 0-10,000 RPM.
    • The transmission control module (TCM) detects no pulse of OSS sensor while the TCM detects 178 pulses of input shaft speed (ISS) sensor. This detection 500 times continuously.
    • D,2,L range selected
    • The input speed is 5 km/h (3 mph) or greater.
    • DTCs P0751, P0753, P0756, P0758, and P0717 are not set.
    • 25 seconds later after Neutral (N) to Drive (D) shift

Action Taken When the DTC Sets
    • TCM will request the illumination of the malfunction indicator lamp (MIL) and store DTC when TCM detects a failure on the first ignition cycle
    • No lockup control
    • No engine torque reduction control
    • No engagement pressure control
    • No 4th gear
    • No self-learning control
    • No prevent reverse gear control

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 250 pulses of OSS sensor while failure detection is not achieved.

Cause of Failure
    • Wiring harness or connector between OSS sensor and TCM
    • OSS 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) 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 P0722 displayed?

--

Go to Step 3

Go to Step 4

3
  1. Turn OFF the ignition.
  2. Inspect the voltage between vehicle harness and the output shaft speed (OSS) sensor.
  3. Disconnect the transmission control module (TCM) connector of the vehicle harness.
  4. Connect the voltmeter to monitor the voltage between terminal B25 and ground.
  5. Turn ON the ignition and lift up the vehicle.
  6. Measure the voltage change when the wheel is turned slowly.

Is the voltage change within the specified value?

0-12 V

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 connectors.

Is the connection condition OK?

--

Go to Step 7

Go to Step 4

6
  1. Estimate the failure of transaxle harness or between the connectors of OSS sensor.
  2. Inspect the OSS sensor.

Is the condition of the OSS sensor OK?

--

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 transaxle harness.
  2. Test continuity and short circuit for the T/M wire and inspect the connection condition between connectors C-4. Refer to Wiring Harness and Connector Inspection Diagnosis .

Is the condition OK?

--

System OK

Go to Step 4

9

Replace the OSS. Refer to Output Speed Sensor Replacement .

Is the replacement complete?

--

System OK

--