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EGR Control Solenoid

  1. Disconnect EGR solenoid electrical harness connector and vacuum hoses. Connect a hand-held vacuum pump to solenoid vacuum source port. Connect vacuum gauge to solenoid EGR port. Pump up vacuum pump. Vacuum should not be present at port to EGR valve.
  2. Activate EGR solenoid with a 12-volt power supply. Vacuum should now be present or registered at vacuum gauge. If vacuum is not present, check EGR solenoid resistance. Solenoid should have at least 20 ohms of resistance.
NOTE: For additional testing procedures, refer to appropriate article in G - TBI TESTS W/ CODES (for Throttle Body Injected models) and G - 4-CYL PFI TESTS W/ CODES (for Port Fuel Injected models) article in this section.
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