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Oxygen Sensor Relay: Testing and Inspection
Fig. 73 Testing oxygen sensor relay.:
1.
Check for clicking noise at
oxygen sensor relay when turning ignition switch on and off.
2.
Apply 12 volts and a ground to
relay terminals A and B,
Fig. 73. 3.
Using ohmmeter check for continuity. There should be no continuity between terminals C and D when voltage is not applied and there should be continuity when 12 volts is applied
