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For 1990-2009 cars only

DTC P0717 5.3L and 6.0L


Object Number: 1679260  Size: LF
Master Electrical Component List
Automatic Transmission Controls Schematics (5.3L/6.0L)
OBD II Symbol Description Notice
Control Module References

Circuit Description

The automatic transmission input shaft speed (AT ISS) sensor assembly is a three-wire hall-effect sensor that is mounted internally to the transmission on the oil pump assembly. The AT ISS utilizes the gear teeth, located on the turbine shaft, to generate a voltage signal of varying frequency that corresponds to the rotational speed of the turbine shaft. The AT ISS signal is an input to the transmission control module (TCM) and is used to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

If the TCM detects AT ISS input less than 100 RPM with the engine running, DTC P0717 sets. DTC P0717 is a type B DTC.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0717 Input Speed Sensor Circuit Low Voltage

Conditions for Running the DTC

    • No vehicle speed sensor (VSS) DTCs P0722 or P0723.
    • No AT ISS DTC P0716.
    • No TFP DTC P1810.
    • The vehicle speed is greater than 16 km/h (10 mph).
    • The engine torque is greater than 90 N·m (66 lb ft).

Conditions for Setting the DTC

The AT ISS RPM is less than 100 RPM for 5 seconds.

Action Taken When the DTC Sets

    • The TCM requests the engine control module (ECM) to illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
    • The TCM commands maximum line pressure.
    • The TCM freezes transmission adapts.
    • The TCM calculates a default AT ISS RPM.
    • The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as Freeze Frame and Failure Records.
    • The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
    • The TCM stores DTC P0717 in TCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Conditions for Clearing the MIL/DTC

    • The ECM turns OFF the MIL after the third consecutive drive trip in which the TCM does not send an MIL illumination request.
    • A scan tool can clear the MIL/DTC.
    • The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.

Diagnostic Aids

    • Inspect the connectors at the TCM, the AT ISS, and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
    • Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents .
    • Road test the vehicle while monitoring the Transmission ISS parameter on the scan tool. The Transmission ISS parameter should vary with engine speed changes and not abruptly drop out.
    • Inspect for an open or shorted AT ISS wire.
    • Inspect for a disconnected AT ISS connector.
    • Inspect for a faulty AT ISS.

DTC P0717

Step

Action

Values

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
  3. 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.

  4. Record the DTC Freeze Frame and Failure Records.
  5. Clear the DTCs.
  6. Start the engine and vary the RPMs.
  7. Observe the Transmission AT ISS parameter on the scan tool.

Is the scan tool Transmission AT ISS parameter greater than the specified value?

400 RPM

Go to Diagnostic Aids

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the AT 20-way connector.
  3. Turn the ignition ON, with the engine OFF.
  4. Using the DMM, measure the voltage of the AT ISS 12-volt reference circuit to ground, at the AT 20-way connector, engine harness side.

Does the voltage measure near the specified value?

12 V

Go to Step 4

Go to Step 7

4

Measure the voltage from the AT ISS 12-volt reference circuit to the AT ISS low reference circuit, at the AT 20-way connector, engine harness side.

Does the voltage measure near the specified value?

12 V

Go to Step 5

Go to Step 8

5

  1. Turn OFF the ignition.
  2. Connect the J 38522 Variable Signal Generator, to the AT ISS signal circuit at the AT 20-way connector, engine harness side.
  3. Adjust the signal to 12 V.
  4. Adjust the frequency to 300Hz.
  5. Adjust the duty cycle to 50 percent.
  6. Turn the ignition ON, with the engine OFF.
  7. Observe the Transmission AT ISS parameter on the scan tool.

Is the Transmission AT ISS RPM near the specified value and steady?

602 RPM

Go to Step 9

Go to Step 6

6

Test the AT ISS signal circuit for the following conditions:

    • An open
    • A short to ground
    • A short to voltage

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 14

Go to Step 13

7

Test the AT ISS 12-volt reference circuit for the following conditions:

    • An open
    • A short to ground

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 14

Go to Step 13

8

Test the AT ISS low reference circuit for an open or a short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 14

Go to Step 13

9

Test the AT ISS internal transmission harness for the following conditions:

    • An open
    • A short to ground
    • A short to voltage

Refer to Circuit Testing .

Did you find a condition?

--

Go to Step 11

Go to Step 10

10

  1. Remove the AT ISS sensor. Refer to Oil Pump Disassemble in the 4L60-E section of the Transmission Unit Repair Manual .
  2. Inspect the AT ISS and the transmission for the following conditions:
  3. • An incorrect AT ISS
    • A loose AT ISS
    • A damaged AT ISS
    • Incorrect AT ISS installation
    • Turbine shaft damage
  4. Repair any of the above conditions as necessary.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 12

11

Replace the internal transmission harness. Refer to Valve Body and Pressure Switch Replacement .

Did you complete the action?

--

Go to Step 14

--

12

Replace the AT ISS. Refer to Oil Pump Disassemble in the 4L60-E section of the Transmission Unit Repair Manual.

Did you complete the replacement?

--

Go to Step 14

--

13

Replace the TCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 14

--

14

Perform the following procedure In order to verify the repair:

  1. Select DTC.
  2. Select Clear Info.
  3. Drive the vehicle.
  4. Ensure the vehicle speed is greater than 20 km/h (13 mph) for at least 10 seconds.
  5. Select specific DTC.
  6. Enter DTC P0717.

Has the test run and passed?

--

Go to Step 15

Go to Step 2

15

With the scan tool, observe the stored information, capture info and DTC info.

Does the scan tool display any DTCs that you have not diagnosed?

--

Go to Diagnostic Trouble Code (DTC) List - Vehicle

System OK