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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 P0722 or P0723 >> 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. Disconnect the X1 harness connector at the TCM.
    2. 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.
  2. Using the light blue probes J 35616-64B test for greater than 250 Ω from the OSS/VSS high signal circuit terminal 41 X1 TCM and the OSS/VSS low signal circuit terminal 16 X1 TCM to a good ground.
    • If less than the specified value, test the affected circuit for a short to ground. If both circuits test normal, replace the OSS/VSS.
  3. Disconnect the X1 connector at the OSS/VSS.
  4. Using a 5A fused jumper wire and the light blue probes J 35616-64B, test for greater than 10K Ω between the OSS/VSS high signal circuit terminal 41 X1 TCM and all other circuits of the X1 TCM harness.
    • If less than the specified value, the affected circuits are shorted together.
  5. Using a 5A fused jumper wire and the light blue probes J 35616-64B, test for greater than 10K Ω between the OSS/VSS low signal circuit terminal 16 X1 TCM and all other circuits of X1 TCM harness.
    • If less than the specified value, the affected circuits are shorted together.
  6. Using the light blue probes J 35616-64B and the grey probes J 35616-2A, test the OSS/VSS high signal circuit for less than 10 Ω between terminal 41 X1 TCM harness and terminal B X1 OSS/VSS.
    • If greater than the specified value, repair the open or high resistance in the affected circuit.
  7. Using the light blue probes J 35616-64B and the grey probes J 35616-2A, test the OSS/VSS low signal circuit for less than 10 Ω between terminal 16 X1 TCM harness and terminal A X1 OSS/VSS.
    • If greater than the specified value, repair the open or high resistance in the affected circuit.
  8. Using the grey test probes J 35616-2A test for 1,650-3,180 Ω between the OSS/VSS high signal circuit, OSS/VSS pin B and the OSS/VSS low signal circuit, OSS/VSS pin A.
    • If not within the specified range, replace the OSS/VSS.
  9. If all circuits and connections test normal, replace the TCM.
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