- Disconnect lambda probe connector.
Connect an ohmmeter as shown in the figure and ring the ground wire. The pictures show a 1.5L engine. Connector -B- is used on vehicles up to 5.90, connector -C- is used on vehicles from 6.90.
- Put on the connector.
- Start the engine and warm it up to operating temperature. The coolant temperature must be between 80°and 90°C.
- Disconnect lambda probe connector.
- Connect a voltmeter to terminal 1 of the connector and to ground.
- Start the engine again and measure the output voltage of the lambda probe. Required value: about 1 V.