Mazda CX-9 Grand Touring 2007 Manual page 131

POSITIVE CRANKCASE VENTILATION (PCV) VALVE HEATER FITTING
INSPECTION [MZI-3.5]
RESISTANCE INSPECTION
1. Disconnect the negative battery cable. (see BATTERY REMOVAL/INSTALLATION [MZI-3.5] .)
2. Disconnect the PCV valve heater fitting connector.
3. Measure the resistance between the PCV valve terminals.
If within the specification, perform out the "Circuit Open/Short Inspection".
If not within the specification, replace the PCV valve heater fitting. (See POSITIVE
CRANKCASE VENTILATION (PCV) VALVE HEATER FITTING
REMOVAL/INSTALLATION [MZI-3.5].)
PCV valve heater fitting resistance
10-35 ohms
Fig. 24: Identifying PCV Valve Heater Fitting Connector Terminals
Courtesy of MAZDA MOTORS CORP.
CIRCUIT OPEN/SHORT INSPECTION
1. Disconnect the PCM connector.
2. Inspect the following wiring harnesses for open or short circuit (continuity check).
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Emission System (MZI-3.5) - CX-9