P0716

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Schematic:

CIRCUIT DESCRIPTION
The automatic Transmission Input (shaft) Speed (ISS) sensor provides transmission input speed to the Vehicle Control Module (VCM). The ISS sensor is a Permanent Magnet (PM) generator. The sensor mounts into the transmission case and maintains a slight air gap between the sensor and the forward clutch housing. The PM generator produces an AC voltage as the forward clutch housing rotor teeth pass through the sensor's magnetic field. The AC voltage level increases as the turbine shaft speed increases. The VCM converts the AC voltage into a digital signal. The VCM determines actual turbine speed using the digital signal. The VCM uses the input speed to calculate torque converter slip speed, and gear ratios.

When the VCM detects an unreasonably large change in the input speed, in a very short period of time, then DTC P0716 sets. DTC P0716 is a type C DTC. For California emissions vehicles, DTC P0716 is a type B DTC.

CONDITIONS FOR RUNNING THE DTC
^ No Throttle Position (TP) sensor DTCs P0121, P0122 or P0123.
^ No OSS DTC P0502 or P0503.
^ No ISS DTC P0717.
^ No shift solenoid DTC P0751 or P0753.
^ The TP is greater than 10%.
^ The vehicle speed is greater than 25 mph.
^ The engine is running greater than 475 RPM for more than 7 seconds.

CONDITIONS FOR SETTING THE DTC
^ The transmission is not in PARK or NEUTRAL.
^ The input speed varies by 1,300 RPM for greater than 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ For California emission equipped vehicles the VCM illuminates the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met. For Non-California emission equipped vehicles the Malfunction Indicator Lamp (MIL) is not illuminated.
^ The VCM commands maximum line pressure.
^ The VCM freezes shift adapts.
^ The VCM records the operating conditions when the Conditions for Setting the DTC are met. The VCM stores this information as Freeze Frame (Calif. only) and Failure Records (Calif. and Federal).
^ The VCM stores the DTC P0716 in VCM history during the second consecutive trip (Calif.) or the first trip (Federal) in which the Conditions for Setting the DTC are met.

CONDITIONS FOR CLEARING THE MIL/DTC
^ For California emissions, the VCM 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.
^ For California emissions, the VCM clears the DTC from VCM history if the vehicle completes 40 consecutive warm-up cycles without an emission related diagnostic fault occurring.
^ For Federal emissions, the VCM clears the DTC from VCM history if the vehicle completes 40 consecutive warm-up cycles without a non-emission related diagnostic fault occurring.
^ The VCM cancels the DTC default actions when the fault no longer exists and/or the ignition switch is OFF long enough in order to power down the VCM.

DIAGNOSTIC AIDS
^ First diagnose and clear any engine DTCs or TP sensor codes that are present. Then inspect for any transmission DTCs that may have reset.
^ When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.
^ Inspect the connectors at the VCM, the ISS sensor 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.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for proper operation to the AT ISS sensor.
10. This step tests for proper AT ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.