Circuit Description
The output speed sensor is a magnetic pick-up which generates a speed signal from a toothed wheel having 12 teeth. The TCM calculates the output shaft RPM from this signal.
Conditions for Running the DTC
| • | The gear position is not equal to P, R, N. |
| • | The engine speed is greater than 3000 RPM. |
Conditions for Setting the DTC
The output speed is 0 RPM.
Action Taken When the DTC Sets
| • | The TCM illuminates the Service Transmission Lamp (STL) and sends a MIL Request to the ECM on the second consecutive drive trip that the diagnostic runs and fails. The ECM then illuminates the MIL. |
| • | The ECM records the operating conditions in the Freeze Frame at the time of the MIL Request from the TCM. |
| • | The transmission operates in the Default Mode. |
Conditions for Clearing the MIL/DTC
| • | The TCM turns off the STL as soon as the fault is no longer present. |
| • | The ECM turns off the MIL after three consecutive drive trips during which the TCM sends no MIL Request. |
| • | A History DTC clears after forty consecutive warm-up cycles, if no failures are present by this diagnostic or any other emission related diagnostic. |
| • | The scan tool clears the MIL/DTC. |
Diagnostic Aids
Use the Connector Test Adapter Kit J 35616-A for any test that requires probing the TCM harness connector or a component harness connector. Using this kit will prevent damage to the harness connector terminals.
Check for the following conditions:
| • | Poor connections at the TCM or at the component. Inspect the harness connectors for any backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. Refer to Engine Electrical, Troubleshooting Procedures, Checking Terminal Contact for proper procedure. |
| • | Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving any related connectors and any wiring harnesses. A change in the display may help to locate the fault. |
Test Description
The number(s) below refer to the step number(s) on the Diagnostic Table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||
For vehicles with independent suspension: Notice: Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.
Is the scan tool indicating the Output Speed? | -- | Refer to Diagnostic Aids | ||
3 |
Is the scan tool indicating Output Speed? | -- | ||
4 |
Does the test light illuminate? | -- | ||
5 | Use the DVM J 39200 in order to check the harness for continuity of the sensor signal high circuit from the TCM harness connector to the sensor harness connector. Is the continuity indicated? | -- | ||
6 | Use the DVM J 39200 in order to check the harness for continuity between the sensor signal high circuit and the ground. Is the continuity indicated? | -- | ||
7 | With the test light J 35616-200 connected to ground, probe the sensor signal low circuit. Does the test light illuminate? | -- | ||
8 | Use the DVM J 39200 in order to check the harness for continuity of the sensor signal low circuit from the TCM harness connector to the sensor harness connector. Is the continuity indicated? | -- | ||
9 | Use the DVM J 39200 in order to check the harness for continuity between the sensor signal low circuit and ground. Is the continuity indicated? | -- | ||
10 | Repair the circuit shorted to B+. Is the action complete? | -- | -- | |
11 | Repair the open/high resistance circuit. Is the action complete? | -- | --
| |
12 | Repair the circuit shorted to ground. Is the action complete? | -- | -- | |
13 | Check the sensor harness connector for a poor connection or a poor terminal tension. Refer to Engine Electrical,Troubleshooting Procedures,Checking Terminal Contact for proper procedure. Was a problem found and corrected? | -- | ||
14 | Replace the sensor. Refer to Automatic Transmission,On Vehicle Service, Output Speed Sensor . Is the action complete? | -- | -- | |
15 | Check the TCM harness connector for a poor connection or a poor terminal tension. Refer to Engine Electrical, Troubleshooting Procedures, Checking Terminal Contact for proper procedure. Was a problem found and corrected. | -- | ||
16 | Replace the TCM. Refer to Automatic Transmission, On Vehicle Service, TCM . Is the action complete? | -- | -- | |
17 |
Is DTC P0722 set? | -- | ||
18 | Were there any additional DTCs noted during the Powertrain or Transmission OBD System Check that have not been diagnosed? | -- | Go to the applicable DTC table | |
19 | Does the Transmission now function properly? | -- | System OK | Go to Functional Test |
