P0717

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Schematic:

CIRCUIT DESCRIPTION
The Automatic Transmission Input Shaft Speed (AT ISS) sensor is a permanent magnet with a coil of wire wound around it. The AT ISS sensor mounts in the case cover facing the reluctor wheel of the input shaft. As the reluctor wheel is driven by the turbine shaft, an AC signal is induced in the input speed sensor. Higher vehicle speeds induce a higher frequency and voltage at the sensor.

There is a fixed air gap between the sensor and the teeth on the sensor reluctor wheel. The AT ISS sensor input is used by the PCM in order to control line pressure, TCC apply and release and transmission shift patterns. This sensor is also used to calculate the gear ratios and TCC slippage.

If the PCM detects a low input speed while the vehicle and engine speeds are high, then DTC P0717 sets. DTC P0717 is a type B DTC.

CONDITIONS FOR RUNNING THE DTC
^ No VSS DTC P0502 or P0503.
^ No TFP manual valve position switch DTC P1810.
^ The engine speed is greater than 500 RPM for 5 seconds and not in fuel shut off.
^ The TFP manual valve position switch indicates that the transmission is not in PARK or NEUTRAL.
^ The vehicle speed is greater than 8 km/h (5 mph).

CONDITIONS FOR SETTING THE DTC
The input shaft speed is less than 50 RPM for 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM illuminates the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
^ The PCM inhibits TCC.
^ The PCM freezes shift adapts.
^ The PCM inhibits 4th gear if the transmission is in Hot Mode.
^ The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and
^ Failure Records.
^ The PCM stores DTC P0717 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
^ A scan tool can clear the MIL/DTC.
^ The PCM clears the DTC from the PCM history if the vehicle completes 40 consecutive warm-up cycles without an emission-related diagnostic fault occurring.
^ The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM.

DIAGNOSTIC AIDS
^ Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Diagrams.
^ Check for Electromagnetic Interference (EMI) in the signal and ground circuits. EMI may be induced by a misrouted wiring harness along the spark plug wires.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. This step checks if the PCM receives a signal from the AT ISS sensor.
3. A Yes answer indicates that the transmission side of the circuit is functioning properly.
4. This step checks the engine harness from the transmission 20-way connector to the PCM.
7. This step begins the transmission harness diagnosis.