PCV Heater: Testing and Inspection

Heated crankcase breather, checking




- disconnect heated crankcase breather harness connector
- switch multimeter US 1119 to resistance range
- connect multimeter to terminals of heater unit (arrow)
- must be between 4 and 17 ohms at approximately 25°C (77°F)

If NO
- replace heater unit

If OK
- switch multimeter US 1119 to 20 volt range



- connect to terminals 1 and 2 of harness connector
- switch ON ignition
- must be approximately 12 volts

If NO
- check wiring and connector from harness connector to battery using wiring diagram, repair as necessary

NOTE: The heater operates whenever the ignition is switched ON, there are no relays or control units in this circuit.