COOLING FAN MOTOR INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))]
COOLING FAN MOTOR INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))]
SM2565683
id0112u0801800
Cooling fan control system Inspection
1.Connect the M-MDS to the DLC-2.
2.Perform the KOEO or KOER self-test using the M-MDS and verify that none of the following DTCs is detected. (See DTC INSPECTION.)
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• P0117:00• P0118:00• P0480:00• P0481:00
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― If any of the following DTCs can be verified, perform the applicable DTC inspection. (See DTC P0117:00 [PCM (SKYACTIV-G)].) (See DTC P0118:00 [PCM (SKYACTIV-G)].) (See DTC P0480:00 [PCM (SKYACTIV-G)].) (See DTC P0481:00 [PCM (SKYACTIV-G)].)
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3.Verify that the engine coolant temperature is less than 97°C {206°F}, and then start the engine and idle it.
4.Verify that the cooling fan does not operate when the A/C switch is turned off.
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• If it is operating, perform the following inspections.
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Inspection items
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• Cooling fan relay No.1 (stuck closed)
• Cooling fan relay No.2 (stuck closed)
• Wiring harness between cooling fan relay No.1 and cooling fan motor (short to power supply)
• Wiring harness between cooling fan relay No.2 and cooling fan motor (short to power supply)
• A/C pressure sensor
• Climate control unit
• CAN communication (PID: AC_REQ constantly ON)
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5.Verify that the cooling fan operates at a low speed when the L_SPD_FAN is turned from OFF to ON using the M-MDS simulation function.
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• If the operation cannot be verified, perform the following inspections.
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Cooling fan status |
Inspection items |
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OFF
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• Cooling fan relay No.1 (stuck open)
• Cooling fan motor (internal open circuit)
• Wiring harnesses between battery and cooling fan relay No.1, and cooling fan relay No.1 and cooling fan motor (fuse blown due to open circuit and short to ground)
• Wiring harness between cooling fan motor and ground (open circuit and poor ground)
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6.Verify that the cooling fan operates at a high speed when the H_SPD_FAN is turned from OFF to ON using the M-MDS simulation function.
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• If the operation cannot be verified, perform the following inspections.
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Cooling fan status |
Inspection items |
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OFF
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• Cooling fan relay No.2 (stuck open)
• Cooling fan motor (internal open circuit)
• Wiring harnesses between battery and cooling fan relay No.2, and cooling fan relay No.2 and cooling fan motor (fuse blown due to open circuit and short to ground)
• Wiring harness between cooling fan motor and ground (open circuit and poor ground)
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Part Inspection
1.Verify that the battery is fully charged. (See BATTERY INSPECTION [(US)].)
2.Disconnect the cooling fan motor connector (3 terminals).
3.Install a tester and battery to the cooling fan motor connector (3 terminals) as shown in the figure.
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4.Verify that each cooling fan motor operates smoothly at the standard current.
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• If there is any malfunction, replace the applicable part.
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Cooling fan motor standard current
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World manufacturer identification “JM1”: 8.3—10.1 A [12 V]World manufacturer identification “3MZ”: 9.5—11.5 A [12 V]