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P0480 on Dodge Grand Caravan

Tiny
DBMOODY25
  • MEMBER
  • 2005 DODGE
  • 77 MILES
I have a 2005 dodge grand caravan. Check engine light came on. The technician diagnosed it as P0480. He checked that both fans were operating normally, and turned off the check engine light signal. For the next few days the check engine light would turn on for awhile, then turn off on its own. I took it back in, and they replaced the fan relay. The check engine light stayed off for awhile, but has now turned back on again. The technician says he has no idea of what else could be wrong. Any ideas?
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Tuesday, July 12th, 2011 AT 2:53 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Welcome to 2carpros.

Here is a description of the problem and possible causes. Chart shows diagnostic procedures.

When Monitored and Set Condition:

P0480-COOLING FAN 1 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 system. One Trip Fault.

POSSIBLE CAUSES

RADIATOR FAN RELAY INTERMITTENT OPERATION

INTERMITTENT CONDITION

GROUND CIRCUIT

FUSED B+ OUTPUT CIRCUIT

POWERTRAIN CONTROL MODULE

RADIATOR FAN RELAY CONTROL CIRCUIT SHORT TO GROUND

RADIATOR FAN RELAY CONTROL CIRCUIT OPEN (IPM)

RADIATOR FAN RELAY CONTROL CIRCUIT OPEN (PCM)

RADIATOR FAN RELAY CONTROL CIRCUIT SHORTED TO GROUND (IPM)

RADIATOR FAN RELAY CONTROL CIRCUIT SHORT TO GROUND (PCM)

INTEGRATED POWER MODULE (OPEN)

INTEGRATED POWER MODULE (SHORT)
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Tuesday, July 12th, 2011 AT 3:26 PM

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