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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 782 (Engine Control System & Fuel System - 2.4L - DTC P0351 To DTC P2544) >> DTC P0685, P0689, or P0690 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the ignition ON, engine OFF, command the powertrain relay ON and OFF several times using the scan tool output control function. You should either hear or feel the relay click with each command.
  2. With the ignition ON, engine OFF, probe both test points of each of the fuses supplied with voltage by the powertrain relay.
    • The test lamp should illuminate on at least one test point of each fuse. If the test lamp does not illuminate continue with Circuit/System Testing.
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