Mazda CX-9 Grand Touring 2009 Manual page 590

1. Connect the M-MDS to the DLC-2.
2. Start and warm up the engine.
3. Monitor the engine coolant temperature with the M-MDS.
Fig. 25: Connecting M-MDS To DLC-2
Courtesy of MAZDA MOTORS CORP.
4. Measure the voltage at terminal A of the fan control module connector (2 terminals) as shown in the
table.
If not within the specification, inspect the input signals from the following parts.
Cylinder Head Temperature (CHT) sensor
Refrigerant pressure switch (middle)
Fig. 26: Identifying Fan Control Module Connector
Courtesy of MAZDA MOTORS CORP.
Single fan control module
SINGLE FAN CONTROL MODULE RESULT REFERENCE
Condition
IG SW ON or idling OFF Less than 96°C {205°F} 0 V (Fan stops.)
Idling
Idling
2008 Mazda CX-9 Grand Touring
2008 ENGINE Cooling System (MZI-3.7) - Mazda CX-9
Inspection
A/C Engine coolant temp.
OFF 96-106°C {205-223°F}
(1)
96-106°C {205-223°F}
ON
Result
4.11-10.29 V
Approx. 6.4 V