Symptom:
P0481-COOLING FAN 2 CONTROL CIRCUIT (TURBO)
When Monitored and Set Condition:
P0481-COOLING FAN 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
circuits. One Trip Fault.
POSSIBLE CAUSES
RADIATOR FAN RELAYS 2 AND 3 OPERATION
FUSED IGNITION SWITCH OUTPUT CIRCUIT
RADIATOR FAN RELAY #2 CONTROL CIRCUIT OPEN BEFORE THE SPLICE
RADIATOR FAN RELAY #3 CONTROL CIRCUIT OPEN BEFORE SPLICE
RADIATOR FAN RELAY CONTROL CIRCUITS SHORT TO GROUND
RADIATOR FAN RELAY CONTROL CIRCUIT OPEN AFTER THE SPLICE
RADIATOR FAN RELAY #2 OR #3
PCM
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, actuate the High Speed Radiator Fan Relay.
Are both Radiator Fan operating at high speed?
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 both of the Radiator Fan Relays (#2 and #3) from the PDC.
Turn the ignition on.
NOTE: A voltage measurement must be taken at both Radiator Fan Relay
Fused Ignition Switch Output circuits in the PDC.
Measure the voltage of the Fused Ignition Switch Output circuit at the radiator Fan
Relay connector in the PDC.
Is the voltage above 11.0 volts at both relay connectors?
All
Yes → Go To 3
No → Repair the Fused Ignition Switch Output circuit. Check and
replace any open fuses.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
181
DRIVEABILITY - NGC
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