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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Automatic Transmission - 4T80-E - DTC P0218 To DTC P2534) >> DTC P0716 or P0717 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the TCM X1 connector.
  2. Measure for 820-1,428 ohms between the ISS high signal circuit terminal 3 and the ISS low signal circuit terminal 26.
    • If greater than the specified range test the ISS high signal and the ISS low signal circuits for an open/high resistance. If the circuits/connections test normal, replace the input shaft speed sensor.
    • If less than 820 ohms test the ISS high signal and the ISS low signal circuits for a shorted together condition. If the circuits/connections test normal, replace the input shaft speed sensor.
  3. Measure for more than 10 ohms of resistance between the ISS high signal circuit terminal 3 and ground.
    • If less than the specified range, repair the short to ground.
  4. Measure for more than 10 ohms of resistance between the ISS low signal circuit terminal 26 and ground.
    • If less than the specified range, repair the short to ground.
  5. Connect the TCM connector. Disconnect the transmission 20-way connector.
  6. Ignition ON, test the ISS high signal circuit terminal 3 for a short to voltage.
    • If all circuits test normal, test or replace the internal transmission wiring harness or the ISS sensor.
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