Test D: The Electric Cooling Fan(s) Is Inoperative/Does Not Operate Correctly

Test D: The Electric Cooling Fan(s) Is Inoperative/Does Not Operate Correctly 2.3 L

Refer to Vehicle/Diagrams for schematic and connector information.

Normal Operation
Under normal operation, in low speed, only the LH fan is initially in operation. Voltage is supplied to the low speed cooling fan relay through circuit 60 (BK/LG). When the relay is energized, voltage is fed to the LH cooling fan motor through circuit 538 (GY/RD). Ground for the cooling fan motor is provided through circuit 57 (BK).

After the LH fan has been energized for 5-10 seconds, the RH fan will start automatically. When the relay is energized, voltage is fed to the RH cooling fan motor through circuit 3829 (LB/BK). Ground for the cooling fan motor is provided through circuit 57 (BK).

Under normal operation, in high speed, both fans are in operation. Voltage is supplied to the high speed cooling fan relay through circuit 30 (BK/LG). When the relay is energized, voltage is fed to the LH and RH cooling fan motors through circuit 229 (RD/OG). Ground for the cooling fan motor is provided through circuit 57 (BK). The low speed cooling fan relays are de-energized.

Possible Causes
^ An open circuit 60 (BK/LG), 30 (BK/LG), 538 (GY/RD), 3829 (LB/BK), 229 (RD/OG) or 57 (BK)
^ A short to voltage on circuit 538 (GY/RD), 3829 (LB/BK) or 229 (RD/OG)
^ Cooling fan relay
^ Cooling fan motor

NOTE: Before carrying out the following test, diagnose any PCM DTCs.

D1:

D1-D2:

D3-D5: