Test D: The Cooling Fan(s) Is Inoperative In Any Speed

Pinpoint Test D: The Cooling Fan(s) Is Inoperative In Any Speed

Normal Operation
Under normal operation, the battery Junction box (BJB) supplies constant power to the low speed engine cooling fan relay through fuse F1.2 (30A) and to the high speed cooling fan relay through fuse F1.6 (50A). The PCM provides the ground through the engine cooling fan resistor on circuit 15S-PA2 (GN/BU) for the low speed engine cooling fan relay on circuit 15S-PA9 (GN/WH) and also the high speed engine cooling fan relay on circuit 15S-PA1 (GN/BU).

Possible Causes
^ Fuse(s):
- F1.2 (30A) low speed
- F1.6 (50A) high speed
^ Circuitry
^ Cooling fan motor
^ Cooling fan resistor
^ Cooling fan relay

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

D1-D2:

D2-D4:

D5-D7:

D7-D8:

PINPOINT TEST D: THE COOLING FAN(S) IS INOPERATIVE IN ANY SPEED