COOLING FAN MOTOR COMPONENT INSPECTION[MZ-CD 1.6 (Y6)]

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1.  Verify that battery voltage is 12.4 V or more.

•  If it cannot be verified, charge the battery or contact an external power supply to the vehicle.

2.  Connect the M-MDS to the DLC-2.

3.  Turn the ignition switch to the ON position.

Note

•  The cooling fan does not operate if the duty value of the fan control signal is 10 % or less, or 95 % or more.

•  The range of the duty value of the fan control signal which the simulation function can control is 10—90 %.

•  Due to the cooling fan protection function, there is a time lag until the fan control signal reaches the specified duty value. (Example: If a fan control signal with a 90 %duty value is input while the cooling fan is stopped, it takes approx. 14 s until the fan speed increases and stabilizes.)

4.  Using the “FAN DUTY” simulation function, input fan control signals with duty values of 20 %, 40 %, 60 %, and 80 % at 30 s intervals and verify that the cooling fan operation speed increases.

•  If the cooling fan does not operate, inspect the following:

―  Open or short circuit in fan control module power supply

―  Open or short circuit in fan control module ground

―  Open or short circuit in the wiring harness between fan control module terminal 1C and PCM terminal 318.

•  If the wiring harnesses and connectors are normal, inspect the cooling fan component.

•  If the cooling fan operation speed does not increase, replace the cooling fan component.