Fan Control Module Inspection

Remove the two bolts from the fan control module with the connectors still connected.
Start and warm up the engine.
Monitor the engine coolant temperature with the WDS or equivalent.

Measure the voltage at the terminal B of cooling fan control module connector (2 terminals) from the harness side as shown in the table.

Fig 1: Identifying Connector Module

Courtesy of MAZDA MOTORS CORP.

ENGINE COOLANT TEMPERATURE

Inspection

Result

Condition

A/C

Engine coolant temp.

IG SW ON

OFF

Below 95°C {203°F}

Fan stops

IG SW ON (Idling)

OFF

Below 95°C {203°F}

Fan stops

IG SW ON (Idling)

ON ⁽¹⁾

Below 95°C {203°F}

6.9V-12.1V

IG SW ON (Idling)

OFF

Above 100°C {212°F}

0-6V-14.6V

⁽¹⁾	When the magnetic clutch and the middle pressure SW are on.