P0716

Diagnostic Chart 1 Of 2:

Diagnostic Chart 2 Of 2:

Schematic:

CIRCUIT DESCRIPTION
The automatic transmission input shaft speed (A/T ISS) sensor is a permanent magnet with a coil of wire wound around it. The A/T ISS sensor mounts in the case cover facing the drive sprocket of the input shaft. As the drive sprocket 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.

An air gap of 0.08-2.12 mm (0.0032-0.0834 in) must be maintained between the sensor and the drive sprocket to insure proper operation of the A/T ISS sensor. The A/T 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 appropriate gear ratios and TCC slippage.

This diagnostic indicates stuck, erratic, or intermittent values, indicating poor performance of the system. If the PCM detects an unrealistically large change in data from the A/T ISS sensor in a short period of time, then DTC P0716 sets. DTC P0716 is a Type B DTC.

CONDITIONS FOR RUNNING THE DTC
^ No TP sensor DTCs P0121, P0122 or P0123 are set.
^ No VSS DTCs P0502 or P0503 are set.
^ No A/T ISS sensor DTC P0717 is set and DTC P0717 has passed this ignition cycle.
^ No 1-2, 3-4 shift solenoid valve DTCs P0751 or P0753 are set.
^ No 2-3 shift solenoid valve DTCs P0756 or P0758 are set.
^ The engine speed is greater than 500 RPM for 5 seconds and not in fuel shut off.
^ The TP angle is greater than 14%.
^ The vehicle speed is greater than 8 km/h (5 mph).

CONDITIONS FOR SETTING THE DTC
The input shaft speed changes by greater than 1300 RPM in 0.8 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 freezes shift adapts.
^ The PCM inhibits TCC.
^ 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 P0716 in PCM history.

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 clears the DTC from the PCM history.
^ 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 circuits 1230 (RED/BLK) and 1231 (DK BLU/WHT). 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 verifies that the PCM receives a signal from the A/T ISS sensor.
3. This step verifies that there are no opens in the circuitry from the A/T ISS sensor to the PCM.
4. This step verifies that there are no faults in the circuitry from the transmission 20-way connector to the PCM.
6. This step performs a resistance check on the A/T ISS sensor and the automatic transmission wiring harness assembly.
9. Because of the harsh conditions inside the transmission, repairing the automatic transmission (A/T) wiring harness assembly is not acceptable. It must be replaced if it is damaged in any way.