P0481

Test 1:

Tests 2 - 4:

Tests 5 - 7:

SYMPTOM
P0481-HIGH SPEED FAN CONTROL RELAY CIRCUIT

WHEN MONITORED
With the ignition ON. Battery voltage greater than 10 volts.

SET CONDITION
An open or shorted circuit is detected in the radiator fan relay control circuit. One trip Fault.

POSSIBLE CAUSES
- Intermittent condition
- Fused ignition switch output circuit
- High speed radiator fan relay resistance
- High speed radiator fan relay control circuit open
- High speed radiator fan relay control circuit short to ground
- PCM