8. Jumper The O2 Sensor

Disconnect the O2 Sensor harness connector of the affected O2 Sensor.

Turn the ignition on.

Jumper the O2 Sensor Signal circuit to a ground.

With the DRB III(R), monitor the O2 Sensor Signal voltage.

Fig 1: Monitoring O2 Sensor Voltage

Courtesy of DAIMLERCHRYSLER CORP.

Does the O2 Sensor voltage stay between 0.4 and 0.6 volts? 

1. Yes  >> Go To 9
2. No  >> Go To 10