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Home >> Chevrolet >> 2009 >> HHR SS, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Automatic Transmission - 4T45-E - DTC P0218 To DTC P2764) >> DTC P0722 or P0723 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the OSS harness connector.
  2. Test for 1,500-1,900 ohms between the OSS high signal circuit terminal A and OSS low signal circuit terminal B on the OSS.
    • If not within the specified range, replace the OSS.
  3. Test for less than 10 ohms between terminal B of the OSS harness connector and terminal 41 of the TCM connector.
    • If greater than the specified value, check the circuit for an open/high resistance.
  4. Test for less than 10 ohms between terminal A of the OSS harness connector and terminal 16 of the TCM connector.
    • If greater than the specified value, check the circuit for an open/high resistance.
  5. Test for infinite resistance between the OSS harness terminal A and ground, and between terminal B and ground.
    • If not the specified value, check each circuit for a short to ground.
  6. If all circuits test normal replace the TCM.
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