DTC P0716 Input Speed Sensor CKT Range/Performance 6.5L Diesel
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 APP Sensor DTCs P0122, P0123, P0222, P0223, P0227, or P0228. |
| • | No ISS Sensor DTC P0717. |
| • | No 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
- The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported.
- 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.
- 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.
-
This step tests for proper operation to the Input Speed Sensor.
-
This step tests for proper circuit operation up to the PCM connections.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||||||
Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. Is the voltage above the specified value? | 0.5 volts | |||||||
3 | Inspect circuit 1231 for an open. Did you find a problem? | -- | ||||||
4 | Inspect circuit 1230 for an open. Did you find a problem? | -- | ||||||
Is the voltage above the specified value? | 0.5 volts | Problem is Intermittent. Refer to Diagnostic Aids | ||||||
6 | Repair the open in circuit 1231. Did you correct the problem? | -- | -- | |||||
7 | Repair the open in circuit 1230. Did you correct the problem? | -- | -- | |||||
8 | Replace the Input Shaft Speed Sensor. Refer to 4L80-E On-vehicle Service. Is the replacement complete? | -- | -- | |||||
9 | Replace the PCM. Refer to Powertrain Control Module Replacement/Programming , Section 6. Is the replacement complete? | -- | -- | |||||
10 | In order to verify your repair, perform the following procedure:
Has the test run and passed? | -- | System OK |
DTC P0716 Input Speed Sensor CKT Range/Performance 4.3L, 5.7, and 7.4L Gas
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 rotational speed.
When the VCM detects an unrealistically large change in input speed, then DTC P0716 sets. DTC P0716 is a type D DTC. For California emissions vehicles, DTC P0716 is a type B DTC.
Conditions for Setting the DTC
| • | No TP Sensor DTC P0122 or P0123. |
| • | No ISS Sensor DTC P0717. |
| • | No OSS Sensor DTC P0502 or P0503. |
| • | No Shift Solenoid DTC P0751 or P0753. |
| • | The throttle position is greater than 18%. |
| • | The vehicle speed is greater than 20 mph. |
| • | The transmission is not in Park or Neutral. |
| • | The engine is running for 5 seconds and not in fuel cut off. |
| • | The input speed varies by 1300 RPM for greater than 1.5 seconds. |
Action Taken When the DTC Sets
| • | The VCM commands D2 line pressure. |
| • | The VCM freezes shift adapts. |
| • | For California emissions only, the VCM illuminates the Malfunction Indicator Lamp (MIL). |
Conditions for Clearing the DTC
| • | For California emissions vehicles, the VCM turns OFF the MIL after three consecutive ignition cycles without a failure reported. |
| • | A scan tool can clear the DTC from the VCM history. The VCM clears the DTC from the VCM history if the vehicle completes 40 warm-up cycles without a failure reported. |
| • | The VCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the VCM. |
Diagnostic Aids
| • | Inspect the wiring for poor electrical connections at the VCM. 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 TP 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.
-
This step tests for proper operation to the Input Shaft Speed Sensor.
-
This step tests for proper circuit operation up to the VCM connections.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | Go to Powertrain On Board Diagnostic (OBD) System Check (4.3L) or Powertrain On Board Diagnostic (OBD) System Check (5.7L and 7.4L) | |||||
Important: Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. Is the voltage above the specified value? | 0.5 volts | |||||||
3 | Inspect circuit 1231 for an open. Did you find a problem? | -- | ||||||
4 | Inspect circuit 1230 for an open. Did you find a problem? | -- | ||||||
Is the voltage above the specified value? | 0.5 volts | Refer to Diagnostic Aids | ||||||
6 | Repair the open in circuit 1231. Did you correct the problem? | -- | -- | |||||
7 | Repair the open in circuit 1230. Did you correct the problem? | -- | -- | |||||
8 | Replace the Input Shaft Speed Sensor. Refer to Automatic Transmission Input (Shaft) Speed Sensor Replacement, in On-vehicle Service. Is the replacement complete? | -- | -- | |||||
9 | Replace the VCM. Refer to VCM Replacement/Programming (Vehicle Control Module) , Section 6. Is the replacement complete? | -- | -- | |||||
10 | In order to verify your repair, perform the following procedure:
Has the test run and passed? | -- | System OK |
