P0730

Diagnostic Chart:

CIRCUIT DESCRIPTION

The Transmission Control Module (TCM) uses Engine Speed, Output Speed, TCC status and the ratio of the current gear in order to determine if excessive component slippage is occurring.

CONDITIONS FOR RUNNING THE DTC

^ The engine is running

^ The gear position is not equal to P, R, N.

^ The transmission is not in default.

^ The transmission is in 3rd gear.

^ The engine speed is greater than 3488 RPM.

^ The output speed greater than 3000 RPM.

CONDITIONS FOR SETTING THE DTC

Absolute slippage that is calculated by the TCM is greater than a predetermined amount.

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 Terminal 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. A problem with the Output Speed Sensor Circuit can cause this DTC to set. Perform that diagnostic procedure first.