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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 4T65-E - DTC PO218 Through DTC P2534) >> DTC P0716 or P0717 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
    IMPORTANT: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
  1. Ignition OFF, using the remover J 44257  , disconnect the automatic transmission inline 20-way connector and install the jumper harness J 44152  on the transmission pass-thru connector. See Special Tools .
  2. Using the light-blue test probes J 35616-65B from the most current J 35616 GM terminal test kit, test for 820-1428 Ω between the ISS high signal circuit jumper harness pin S and the ISS low signal circuit jumper harness pin V.
    • If greater than the specified range, test the affected circuits for an open/high resistance. If both circuits test normal, replace the ISS.
    • If less than the specified range, test the affected circuits for a shorted together condition. If both circuits test normal, replace the ISS.
  3. Test for greater than 10K Ω between the ISS high signal circuit jumper harness pin S and all other circuits of the jumper harness J 44152  , except the ISS low signal circuit jumper harness pin V. See Special Tools .
    • If less than the specified range, the affected circuits are shorted together. Replace the transmission internal wire harness.
  4. Test for greater than 250 Ω from the ISS high signal circuit jumper harness pin S and the ISS low signal circuit jumper harness pin V to the transmission case.
    • If less than the specified value, test the affected circuits for a short to the transmission case. If both circuits test normal, replace the ISS.
  5. Using the remover J 44257  , remove the jumper harness J 44152  from the transmission pass-thru connector and install it on the engine side of the AT inline 20-way connector. See Special Tools .
  6. Disconnect the X1 harness connector at the TCM.
    7. IMPORTANT: When test probing TCM harness terminals, it is imperative to use the proper test probe from the most current version of the J 35616 GM terminal test kit. Use of the brown J 35616-6 (1.00 mm) PCM probe in a 0.64 mm terminal will deform the terminal, resulting in intermittent open conditions. The correct probe for TCM harnesses is the light blue J 35616-64B probe.
  7. Using the light blue probes J 35616-64B, test for greater than 250 Ω from the ISS high signal circuit jumper harness terminal S and the ISS low signal circuit jumper harness terminal V to a good ground.
    • If less than the specified value, test the affected circuit for a short to ground.
  8. Using the light blue probes J 35616-64B, test for greater than 10K Ω between the ISS high signal circuit jumper harness terminal S and all other circuits of the jumper harness J 44152  . See Special Tools .
    • If less than the specified value, the affected circuits are shorted together.
  9. Using the light blue probes J 35616-64B, test for greater than 10K Ω between the ISS low signal circuit jumper harness terminal V and all other circuits of the jumper harness J 44152  . See Special Tools .
    • If less than the specified value, the affected circuits are shorted together.
  10. Using the light blue probes J 35616-64B, test the ISS high signal circuit for less than 10 Ω between the jumper harness J 44152  terminal S and terminal 3 X1 TCM. See Special Tools .
    • If greater than the specified value, repair the open or high resistance in the affected circuit.
  11. Using the light blue probes J 35616-64B, test the ISS low signal circuit for less than 10 Ω between the jumper harness J 44152  terminal V and terminal 26 X1 TCM. See Special Tools .
    • If greater than the specified value, repair the open or high resistance in the affected circuit.
  12. Using a 5A fused jumper wire and the light blue probes J 35616-64B, test for greater than 10K Ω between the ISS high signal circuit terminal 3 X1 TCM and all other circuits of X1 TCM.
    • If less than the specified value, the affected circuits are shorted together.
  13. Using a 5A fused jumper wire and the light blue probes J 35616-64B, test for greater than 10K Ω between the ISS low signal circuit terminal 26 X1 TCM and all other circuits of X1 TCM.
    • If less than the specified value, the affected circuits are shorted together.
  14. If all circuits and connections test normal, replace the TCM.
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