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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1702 (Engine Controls And Fuel - 3.5L - DTC P025A/P0300 To DTC P0700) >> DTC P0685, P0689, or P0690 >> Circuit/System Verification

Circuit/System Verification

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. Ignition ON, verify that the EC Ignition Relay Feedback Signal parameter indicates B+ voltage.
  2. Ignition ON, command the powertrain relay ON and OFF. Listen or feel to verify that the powertrain relay turns ON and OFF with the commanded states.
  3. Engine running, command the powertrain relay ON and OFF with a scan tool while observing the following powertrain relay parameters:
    • Powertrain Relay Coil Control Ckt. Short Gnd Test Status
    • Powertrain Relay Coil Control Ckt. Open Test Status
    • Powertrain Relay Coil Control Ckt. Short Volts Test Status
    • Each parameter should toggle between OK and Not Run or Not Run and OK.
  4. Ignition ON, engine OFF, with a test lamp, probe both test points of all the fuses that are powered by the powertrain relay. The test lamp should illuminate ON for at least one test point of each fuse.
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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