Symptom:
P0480-COOLING FAN 1 CONTROL CIRCUIT
P0481-COOLING FAN 2 CONTROL CIRCUIT (NON-TURBO)
When Monitored and Set Condition:
P0480/P0481-COOLING FAN 1/2 CONTROL 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
LOW SPEED RADIATOR FAN RELAY OPERATION
FUSED B+ FEED CIRCUITS
LOW SPEED RADIATOR FAN RELAY RESISTANCE
LOW SPEED RAD FAN RELAY CONTROL CIRCUIT OPEN
LOW SPEED RAD FAN RELAY CONTROL CIRCUIT SHORT TO GROUND
PCM
TEST ACTION APPLICABILITY
1 Ignition on, engine not running.
With the DRBIIIt, actuate the Radiator Fan Relay.
Is the Radiator Fan Relay operating?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 2
2 Turn the ignition off.
Remove the Radiator Fan Relay from the PDC.
Ignition on, engine not running.
Measure the voltage of the Fused B+ Feed circuit in the PDC.
Is the voltage above 11.0 volts?
All
Yes → Go To 3
No → Repair the (A16) Fused B+ Output circuit. Inspect the related
fuse and repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
179
DRIVEABILITY - NGC
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