DTC P0481 - Fan 2 Control Circuit

P0481 - FAN 2 CONTROL CIRCUIT

Description:	This DTC sets when the HFC output is commanded on (grounded) and excessive current draw is detected on the HFC circuit; or when the HFC circuit is commanded off and voltage is not detected on the HFC circuit. The PCM expects to detect VPWR voltage through the high speed fan control (FC) relay coil to the HFC circuit.
Possible Causes:	HFC circuit open HFC circuit short VPWR circuit to the HFC relay open Damaged HFC relay
Diagnostic Aids:	When the HFC_F PID reads YES, a concern is present. An open circuit or short to ground can only be detected when the PCM is not grounding the HFC circuit. A short to voltage can only be detected when the PCM is grounding the HFC circuit.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST KF .