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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Instrument Panel System Displays & Gages) >> Diagnostic Information and Procedures >> Engine Oil Pressure Indicator Always On (3.8L L26 and L32) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Do not turn the key to the crank position or engage the starter at any time during diagnosis.
  1. Ignition ON, verify the scan tool EOP Switch parameter is Low.
    • If not Low, replace the IPC.
  2. Ignition OFF, disconnect the EOP switch.
  3. Ignition ON, verify the scan tool Engine Oil Pressure Switch parameter is OK.
    • If not OK, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the ECM.
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