3: Radiator Fan and Condenser Fan Do Not Operate

INSPECTION PROCEDURE 3: Radiator Fan and Condenser Fan do not Operate

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Radiator Fan and Condenser Drive Circuit

CIRCUIT OPERATION
^ The fan control module is powered from fusible link number
^ The ECM or PCM judges the required revolution speed of radiator fan motor and condenser fan motor using the input signals transmitted from A/C switch, automatic compressor controller, vehicle speed sensor , output shaft speed sensor and engine coolant temperature sensor. The ECM or PCM activates the fan control module to drive the radiator fan motor and condenser fan motor.

TECHNICAL DESCRIPTION
^ The cause could be a malfunction of the fan control module power supply or ground circuit.
^ The cause could also be a malfunction of the fan control module or the ECM or PCM .

TROUBLESHOOTING HINTS
^ Malfunction of fusible link
^ Malfunction of fan control relay
^ Malfunction of fan control module
^ Malfunction of ECM or PCM
^ Damaged wiring harness or connector

DIAGNOSIS
Required Special Tool: MB991223: Harness Set

Step 9 - 10

Step 11

Q:Are the Harness wires between ECM connector C-109 , <2.4L-M/T>, C-111 <3.0L-M/T> or PCM connector C-110 <2.4L-A/T>,C-112 <3.0L-A/T> and Fan Control module connector A-30 damaged?
Yes: Repair or replace them, then go to Step 13.
No: Go to Step 12.

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