939005364 - 1080BD DOWNSTREAM LAMBDA SENSOR OPERATION CHECK

Disconnect the negative battery terminalDisconnect the electrical connection for the two downstream Lambda sensors    See K017 LAMBDA SENSOR ON CATALYZER     See K018 LAMBDA SENSOR ON CATALYZER - 2 Check that the heater resistance between Pins 3 and 4 is between 3.5 and 4.5 Ohm