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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 793 (Engine Controls And Fuel - 2.0L - DTC P0243 To DTC P0700) >> DTC P0685, P0686, P0687, P0689, or P0690 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, allow the ECM to completely power down. Probe both test points of each of the fuses supplied with voltage by the powertrain relay. The test lamp should not illuminate on any test point of any fuse.
  2. Ignition ON, probe both test points of each of the fuses supplied with voltage by the powertrain relay. The test lamp should illuminate on at lease one test point of each fuse.
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