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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Automatic Transmission - 5L40-E (DTC P0115 To P0742)) >> Automatic Transaxle Diagnosis >> DTC P0717 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

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

  1. 3:  The resistance measurement will not change if either the ISS high signal circuit or the ISS low signal circuit, but not both, is shorted to ground. The vehicle speed detector in the TCM and the ISS are matched in such a way that an open or a short to ground in the ISS low signal circuit will not usually cause a loss of speed signal or a DTC P0717 to set.
  2. 6:  This step isolates the short between the ISS and the wiring.
  3. 11:  Refer to the latest procedures for TCM reprogramming.
DTC P0717

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check - Automatic Transmission? - Go to Step 2  Go to Diagnostic System Check - Automatic Transmission
2
  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
    3. IMPORTANT:
    • Before clearing the DTC, use the scan tool in order to record the ECM Freeze Frame and the TCM Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the ECM and the TCM.
    • Using the Clear Info function erases stored DTCs in both the ECM and TCM.
  3. Record the DTC Freeze Frame and Failure Records.
  4. Clear the DTC.
  5. Start the engine.
  6. Select Transmission ISS on the scan tool.
Does the scan tool display input shaft speed above the specified value?		 500 RPM Go to Intermittent Conditions in Engine Controls - 2.6L and 3.2L or Intermittent Conditions in Engine Controls - 3.6L (LY7) Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the TCM.
  3. Using the DMM and the J 35616  GM-terminal test kit, measure the resistance between the ISS high signal and low signal circuits at the TCM connector.
Is the resistance within the specified range?		 325-575 ohm Go to Step 5  Go to Step 4 
4 Test the ISS high signal circuit and ISS low signal circuit for the following conditions:
  • An open circuit or high resistance condition
  • ISS high signal and ISS low signal circuits shorted together

Refer to Testing for Continuity in Wiring Systems.
Did you find and correct a condition?		 - Go to Step 12  Go to Step 9 
5 Measure the resistance between the ISS high signal circuit at the TCM connector and ground.
Is the resistance greater than the specified value?		 50K ohm Go to Step 8  Go to Step 6 
6 
  1. Leave the DMM connected between the ISS high signal circuit and ground.
  2. Disconnect the ISS.
  3. Measure the resistance.
Is the resistance greater than the specified value?		 50K ohm Go to Step 9  Go to Step 7 
7 Repair the short to ground in the ISS high signal circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 12  -
8
  1. Connect the DMM between the ISS high signal and low signal circuits at the TCM connector.
  2. Place the transmission in Park.
  3. Start the engine.
Is the AC voltage equal to or greater than the specified value?		 0.5 V Go to Step 11  Go to Step 9 
9
  1. Remove the ISS. Refer to Input Speed Sensor Replacement .
  2. Inspect the ISS and the ISS rotor for the following conditions:
    • ISS damage
    • ISS rotor damage
    • Excessive air gap between the reverse clutch input housing assembly (401) rotor and the ISS
    • Incorrect alignment between the ISS and the reverse clutch input housing assembly (401) rotor
  3. Repair or replace any of the above items as necessary.
Did you find and correct a condition?		 - Go to Step 12  Go to Step 10 
10 Replace the ISS. Refer to Input Speed Sensor Replacement .
Did you complete the replacement?		 - Go to Step 12  -
11  Replace the TCM. Refer to Transmission Control Module (TCM) Replacement .
Is the action complete?		 - Go to Step 12  -
12 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Start and idle the engine.
  4. Observe Transmission ISS on the scan tool. Input speed must be greater than 500 RPM for 5 seconds.
  5. Select Specific DTC.
  6. Enter DTC P0716.

Has the test run and passed?		 - Go to Step 13  Go to Step 2 
13 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 in Engine Controls - 2.6L and 3.2L or Diagnostic Trouble Code (DTC) List in Engine Controls - 3.6L (LY7) System OK
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