P0716

Diagnostic Chart:

Wiring Diagram:

Circuit Description
The Transmission Input Shaft Speed Sensor consists of a permanent magnet surrounded by a coil of wire. The rotation of the forward clutch housing induces an AC voltage in the circuit. The signal voltage and frequency vary directly with the forward clutch housing rotational speed.

When the PCM detects an unrealistically large change in input speed after a valid input speed has been detected, then DTC P0716 sets. DTC P0716 is a type A DTC.

Conditions for Setting the DTC

^ No Accelerator Pedal Position (APP) Sensor DTCs P0122, P0123, P0222, P0223, P0227, or P0228.
^ No Input Speed (ISS) Sensor DTC P0717.
^ No Output Speed (OSS) Sensor DTCs P0722 or P0723.
^ No Shift Solenoid DTC P0751, P0753, P0756, P0758.
^ The throttle position is greater than 15%.
^ The vehicle speed is greater than 20 mph.
^ The input speed varies by 1000 RPM within 2 seconds.

Action Taken When the DTC Sets

^ The PCM commands maximum line pressure.
^ The PCM freezes shift adapts.
^ The PCM illuminates the Malfunction Indicator Lamp (MIL).

Conditions for Clearing the MIL/DTC
1. The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported.
2. A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported.
3. The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM

Diagnostic Aids

^ Inspect the wiring for poor electrical connections at the PCM Inspect the wiring for poor electrical connections at the transmission 20-way connector. Look for the following conditions:

- A bent terminal
- A backed out terminal
- A damaged terminal
- Poor terminal tension
- A chafed wire
- A broken wire inside the insulation

^ When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change.
^ First diagnose and clear any engine DTCs or APP Sensor codes that are present. Then inspect for any transmission DTCs that may have reset.

Test Description
The numbers below refer to the step numbers on the diagnostic table.

2. This step tests for proper operation to the Input Speed Sensor.
5. This step tests for proper circuit operation up to the PCM connections.