P1491

Tests 1 - 4:

Tests 5 - 8:

SYMPTOM
P1491-RADIATOR FAN CONTROL RELAY CIRCUIT

POSSIBLE CAUSES
- Radiator Fan Control Relay circuit wire harness intermittent problem
- Radiator Fan Control Relay circuit wire harness observable problem
- Radiator Fan Relay ground circuit open
- Radiator Fan Relay control circuit open
- Radiator Fan Relay control circuit short to ground
- Radiator Fan Control Relay
- PCM