FAN CONTROL MODULE INSPECTION [MZI-3.7]

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1.  Connect the M-MDS to the DLC-2.

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2.  Start and warm up the engine.

3.  Monitor the engine coolant temperature with the M-MDS.

4.  Measure the voltage between cooling fan motor connector (2 terminals) terminals A and B from the harness side as shown in the table.

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•  If not within the specification, inspect the input signals from the following parts.
―  Cylinder Head Temperature (CHT) sensor
―  Refrigerant pressure switch (middle)

Inspection

Result

Condition

A/C

Engine coolant temp.

IG SW ON or idling
OFF
Less than 96 °C {205 °F}
0 V (Fan stops.)
Idling
OFF
96—106 °C {205—223 °F}
4.11—10.29 V
Idling
ON*1
96—106 °C {205—223 °F}
Approx. 6.6 V
Idling
ON*2
96—106 °C {205—223 °F}
Approx. 7.5 V
Idling
OFF
More than 106 °C {223 °F}
B+

*1  :Refrigerant pressure switch (middle) is off.
*2  :Refrigerant pressure switch (middle) is on.

5.  If all the above parts are normal, replace the fan control module.