DTC P0717 Input Speed Sensor Circuit Low Input. Cadillac Seville 2000

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2000 🢒 Seville 🢒 DTC 🢒 DTC P0717 Input Speed Sensor Circuit Low Input

Automatic Transmission Components
Automatic Transmission Controls Schematics
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice

Circuit Description

The automatic transmission input (shaft) speed sensor (AT ISS) is a permanent magnet with a coil of wire wound around it. The AT ISS mounts in the transmission case facing the drive sprocket of the input shaft. An air gap of 0.045-0.109 in. between the sensor and the drive sprocket must be maintained so that an accurate AC voltage can be transmitted. Sensor voltage varies from 0.5 volts AC at 100 RPM to more than 100 volts at 8000 RPM. The AT ISS has a resistance value of 1300-1950 ohms.

If the PCM detects a low input speed while the vehicle and engine speeds are high, then DTC P0717 sets. DTC P0717 is a type B DTC.

Conditions for Running the DTC

•	No VSS DTCs P0502 or P0503.

•	No IMS DTCs P1820, P1822, P1823, or P1825.

•	The system voltage is 8-18 volts.

•	The engine run time is greater than 5 seconds.

•	The engine is not in fuel cut off.

•	The transmission is not in PARK or NEUTRAL.

•	The vehicle speed is greater than 16 km/h (10 mph).

Conditions for Setting the DTC

The input (shaft) speed is less than 51 RPM for 6 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 commands maximum line pressure.

•	The PCM inhibits TCC engagement.

•	The PCM calculates input (shaft) speed from vehicle speed and commanded gear.

•	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 P0717 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

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 can clear the MIL/DTC.

•	The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.

•	The PCM 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 PCM.

Diagnostic Aids

•	Inspect the connectors at the PCM, the AT ISS and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

•	Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.

Test Description

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

This step tests the AT ISS for correct resistance.

Replace the PCM only after completing all circuit tests.

DTC P0717 Input Speed Sensor Circuit -- Low Input

Step

Action

Value(s)

Yes

Did you perform the Powertrain Diagnostic System Check ?

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

Install a Scan Tool .
Turn ON the ignition, with the engine OFF.

Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the PCM.

Record the DTC Freeze Frame and Failure Records.
Clear the DTC.
Start the engine.
Select Transmission ISS on the Scan Tool .

Is the transmission input speed greater than the specified value?

500 RPM

Go to Diagnostic Aids

Go to Step 3

Turn OFF the ignition.
Disconnect the AT inline 20-way connector (additional DTCs may set).
Install the J 44152 jumper harness (20 pins) on the transmission side of the AT inline 20-way connector.
Using the J 39200 digital multimeter (DMM), and the J 35616 connector test adapter kit , measure the resistance between terminals S and V of the J 44152 .

Refer to Automatic Transmission Inline Harness Connector End View .

Is the resistance within the specified range?

1300-1950 ohms

Go to Step 6

Go to Step 4

Test the signal circuit (CKT 1230) of the AT ISS for an open or short to ground between the AT inline 20-way connector and the AT ISS.

Refer to Circuit Testing in Wiring Systems.

Did you find the condition?

Go to Step 8

Go to Step 5

Test the ground circuit (CKT 1231) of the AT ISS for an open between the AT inline 20-way connector and the AT ISS.

Refer to Circuit Testing in Wiring Systems.

Did you find the condition?

Go to Step 8

Go to Step 9

Test the signal circuit (CKT1230) of the AT ISS for an open between the PCM connector C1 and the AT inline 20-way connector.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 7

Test the ground circuit (CKT 1231) of the AT ISS for an open between the PCM connector C1 and the AT inline 20-way connector.

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

Replace the automatic transmission wiring harness.

Refer to Transmission Overhaul in the 4T80-E section of the Transmission Unit Repair Manual.

Did you complete the replacement?

Go to Step 11

Replace the AT ISS.

Refer to Transmission Overhaul in the 4T80-E section of the Transmission Unit Repair Manual.

Did you complete the replacement?

Go to Step 11

Replace the PCM.

Refer to Powertrain Control Module Replacement/Programming in Engine Controls.

Did you complete the replacement?

Go to Step 11

Perform the following procedure in order to verify the repair:

Select DTC.
Select Clear Info.
Operate the vehicle under the following conditions:

•	Place the transmission in PARK.

•	Start the engine.

•	The transmission input speed must be greater than 500 RPM for 2 seconds.

Select Specific DTC. Enter DTC P0717.

Has the test run and passed?

System OK

Go to Step 1