P0716

DIAGNOSTIC TROUBLE CODE (DTC) P0716 INPUT SPEED SENSOR CIRCUIT RANGE PERFORMANCE





Circuit Description
Transmission input speed is provided to the Powertrain Control Module (PCM) by the Automatic Transmission Input (Shaft) Speed Sensor (A/T ISS), which is a Permanent Magnet (PM) generator. The sensor mounts into the transmission case and maintains a slight air gap between the sensor and the drive sprocket. The PM generator produces an AC voltage as the drive sprocket rotor teeth pass in front of the sensor's magnetic field. The AC voltage level increases as the speed of the turbine shaft increases. The PCM then converts the AC voltage into a digital signal. This digital signal is then used by the PCM to determine actual turbine speed. The PCM uses input speed to calculate torque converter slip speed and gear ratios.
When the PCM detects an unrealistic large change in input speed, then Diagnostic Trouble Code (DTC) P0716 sets.

Conditions For Setting The DTC
- Input speed change is greater than 1300 rpm in 0.8 seconds.
- No Input Speed Sensor (ISS) DTC P0717.
- No TPS high or low codes.
- No Vehicle Speed Sensor (VSS) DTCs P0722 or P0723.
- No 1-2 Shift Solenoid (1-2 SS) DTC P0751 or P0753.
- No 2-3 Shift Solenoid (2-3 SS) DTC P0758.
- Engine running.
- Throttle Position (TP) angle is greater then 15%.
- Vehicle speed is greater than 8 km/h (5 mph).

Action Taken When The DTC Sets
- PCM illuminates the Malfunction Indicator Lamp (MIL) after two consecutive tries with a failure reported.
- DTC P0716 will be stored in PCM memory.
- PCM inhibits Torque Converter Clutch (TCC) engagement.
- Freeze shift adapts from being updated.
- PCM commands maximum line pressure.

Conditions For Clearing The DTC
- PCM turns off the MIL after three consecutive ignition cycles without a failure reported.
- Input speed is greater than 50 rpm.
- When the input speed has changed less than 300 rpm in 0.3 seconds for three consecutive ignition cycles.
- No ISS DTC P0717.
- History DTCs can be cleared by using a Scan Tool.

Diagnostic Aids
- This diagnostic test checks for an ISS circuit problem. If the engine is running and the vehicle is moving above a certain speed, then the input speed must be non-zero.
- Inspect the wiring for poor electrical connections at the PCM and at the transmission 20-way connector. Look for possible bent, backed out, deformed or damaged terminals. Check for weak terminal tension as well. Also check for chafed wires that could short to bare metal or other wiring. Inspect for broken wire inside the insulation.
- If diagnosing for a possible intermittent short or open condition, move or massage the wiring harness while observing test equipment for a change.

Test Description
The numbers below refer to the step numbers on the diagnostic chart.
3. This test checks the speed sensor for correct resistance.
7. This test verifies the wiring from the transmission 20-way connector to the PCM, and tests the ability of the A/T ISS to produce an AC current.








DTC P0716 - Input Speed Sensor Circuit Range/Performance