P1489 High Speed Fan Control Relay Circuit
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P-1489 HIGH SPEED FAN CONTROL RELAY CIRCUIT
WHEN MONITORED
With the ignition key in the run position and battery voltage above 10 volts.
SET CONDITION
An open or shorted condition is detected in the high speed fan relay control circuit.
POSSIBLE CAUSES
- Ignition switch output circuit open
- High speed fan relay defective
- High speed fan ctrl rly wiring harn observable def
- High speed fan ctrl rly wrg harn intermittent def
- High speed fan relay control circuit open
- High speed fan rly control circuit short to ground
- Powertrain control module defective