Engine Code

Tests 1 - 2:

Tests 3 - 7:

SYMPTOM
P1479 - TRANSMISSION FAN RELAY CIRCUIT

WHEN MONITORED
Turn the ignition ON and battery voltage greater than 10.0 volts.

SET CONDITION
An open or shorted condition detected in the Transmission Fan Relay Control circuit (coil side of the relay)

POSSIBLE CAUSES
- Intermittent wiring & connectors conditions
- Open fused ignition switch output circuit
- Transmission cooling fan relay control circuit open
- Transmission fan relay control circuit shorted to ground
- Transmission fan relay inoperative
- PCM (transmission fan)