Mazda CX-9 Grand Touring 2009 Manual page 1711

1. Measure the temperature at the blower inlet.
2. Measure the resistance between the rear evaporator temperature sensor terminals.
If the resistance is not as shown in the graph, replace the rear evaporator temperature sensor.
Fig. 51: Rear Evaporator Temperature Sensor Resistance & Temperature Graph
Courtesy of MAZDA MOTORS CORP.
REFRIGERANT PRESSURE SWITCH REMOVAL/INSTALLATION
1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See REFRIGERANT RECOVERY .) (See
REFRIGERANT CHARGING .)
3. Grasp the piping block using pliers and remove the pressure switch using a spanner.
4. Disconnect the refrigerant pressure switch connector.
5. Remove in the order indicated in the table.
2008 Mazda CX-9 Grand Touring
2008 HVAC Control System (HVAC) - Mazda CX-9