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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. If DTCs P0685, P0690, or B1380 are set, diagnose those DTCs first.
  2. Ignition ON, engine OFF, observe the Ignition 1 Voltage Signal, and the EC Ignition Relay Feedback Signal parameters, on the scan tool. Both parameter values should display no more than 3 volts difference, between the two parameters.
  3. Ignition OFF, observe the Ignition 1 Voltage Signal parameter on the scan tool. The parameter value should be 0 volts, before the ECM powers down.
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