lemon-mirror:
Home >> Volvo >> 1990 >> 760 GLE, AW71 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel Control >> Oxygen (O2) Sensor

Oxygen (O2) Sensor

  1. Warm engine to normal operating temperature. Connect exhaust gas analyzer. Disconnect O2 sensor wire (at O2 sensor) from ECU.
  2. Connect a jumper wire between ECU wiring (O2 sensor harness side) and ground. CO content should increase, indicating ECU and its connections are okay.
  3. Connect a voltmeter to O2 sensor. While engine is running voltmeter should fluctuate at approximately 0.5 volts if CO constant is normal. Replace O2 sensor if not within specification.
· About lemon-mirror