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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect harness connector X2 from the SGCM. Refer to Generator Control Module Replacement .
  2. Test for 5-100 ohms between terminals 9 and 12.
    • If within the specified range, replace the SGCM.
  3. Disconnect the X1 connector at the MGU. Refer to Generator with Starter Replacement .
  4. Test for less than 1 ohm between SGCM connector harness terminal 12 and the MGU connector harness terminal A.
    • If greater than the specified range, test the circuit for open/high resistance.
  5. Test for less than 1 ohm between SGCM connector harness terminal 9 and the MGU X1 connector harness terminal C.
    • If greater than the specified range, test the circuit for open/high resistance.
  6. If both circuits test normal, replace the MGU.
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