P0722

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The output speed sensor is a magnetic pick-up which generates a speed signal from a toothed wheel having 12 teeth. The Transmission Control Module (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 Malfunction Indicator Lamp (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 Overall Vehicle Information / Diagrams / Diagnostic Aids for Checking Term Thai Contact 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.

2. If the Output Speed is greater than 0 RPM, the sensor is generating a signal.The Output Speed is the rotational speed of the driveshaft. A rough comparison can be made with Engine Speed when the transmission is in Drive 3 and the drive wheels are spinning freely.