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2004 Carnival, 2.5L KV6 / GV6 / K5 engine
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where do i start?
Try Googling 'Kia Code P0480'.

For example the first hit I got was:

Kia Motors

Generic OBD Error Code Details for P0480

Fan 1 Control Circuit

What does this mean?

OBD Code P0480 refers to
The electric cooling fan is controlled by the powertrain control module (PCM) through the cooling fan relay based on inputs from the following components: - The engine coolant temperature (ECT) sensor - The intake air temperature (IAT) sensor - The A/C selector switch - The A/C refrigerant pressure sensor - The vehicle speed sensor (VSS) The PCM controls the cooling fan by grounding the cooling fan control circuit which turns ON the cooling fan relay. The cooling fan relay will be commanded ON when the following conditions are met: - The engine coolant temperature reaches 106°C (223°F) or more. - The A/C clutch requested. - The vehicle speed is less than 38 MPH. The cooling fan relay will be commanded ON regardless of vehicle speed when the following conditions are met: - The engine coolant temperature is 151°C (304°F) or more. - The A/C refrigerant pressure is high. The cooling fan may be commanded ON when the engine is not running under a fan run-on conditions described in the electric cooling fan general description portion of the service manual.
Symptoms

Possible sumptoms of OBD code P0480
- Engine Light ON (or Service Engine Soon Warning Light) - Engine overheating

Causes

Possible causes of OBD code P0480
- Fan control relay harness - Fan control relay connector - Fan control relay - Cooling Fan 1 The Error code is generally activated on detection of the following conditions: The P0481 code is detected when the PCM detects that the commanded state of the driver and the actual state of the control circuit do not match.
Possible Solutions

- Replace the malfunctioning fan control relay 1 - Replaced cooling fan 1
 

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2004 Carnival, 2.5L KV6 / GV6 / K5 engine
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99 Posts
The ECU (or 'PCM' as its described in the Kia description of the P0480 code above - 'The Computer that Controls The Engine' in other words) controls the fan via the relay.

Where you say you checked, and the fan module was not getting power, I assume you are testing this with a meter.

Do you mean that there's no +12v on the 'battery' side of the relay switch contacts?

Or that the ECU is not powering the relay coil when you would expect the ECU to have the fan switched on?

Peter
 

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Discussion Starter #6
there is power going to the fan relay, the relay clicks when the vehicle is turned on, when i put the defroster and /or the ac on and check the plug going to the fan module there is no crrent going to it, would the relay click if it was bad?
 

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2004 Carnival, 2.5L KV6 / GV6 / K5 engine
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there is power going to the fan relay, the relay clicks when the vehicle is turned on, when i put the defroster and /or the ac on and check the plug going to the fan module there is no crrent going to it,
Where you say there is no current going to the fan module, I assume you are using a meter to determine this.
In that case, have you used the meter to check that there's +12v on the 'battery' side of the relay switch contacts?

I'm assuming here of course you would have checked the fuse long ago!

would the relay click if it was bad?
The clicking indicates that the relay's coil is ok, but the relay's contacts could be bad e.g. burnt.

The first thing to verify is that you have 12v on the 'battery' side of the relay. Then, with the relay activated check if that 12v is appearing on the fan side of the relay.
 

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Discussion Starter #8
i hate to sound like such a novice but how do i check the fan side of the relay, thanks for your help
 

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2004 Carnival, 2.5L KV6 / GV6 / K5 engine
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i hate to sound like such a novice but how do i check the fan side of the relay, thanks for your help
No problem, people on this forum are here to help. But firstly, with reference to your post of yesterday where you said:

when i put the defroster and /or the ac on and check the plug going to the fan module there is no crrent going to it
- can you tell me how you established that there was no current going to the fan module?

That suggested you have a meter to check the voltage to the fan module, and if that's the case I can give you some further pointers on how to diagnose this.

Also, can you just confirm that you have checked the cooling fan fuse? (Labelled 'C/FAN', 40A, & in the under-bonnet/hood fuse & relay box on mine - yours may differ).
 

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Discussion Starter #10
i plugged the 60a fan relay in and checked the each of the 4 prongs with a multimeter, 3 of the four registered approx 14v, the fourth nothing, i then checked the plug that goes into the fan module, i probed the six holes and only one had power and only 2v, not sure what that means
 

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2004 Carnival, 2.5L KV6 / GV6 / K5 engine
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The standard automotive relay pinout IDs should be visible next to each prong:

- 85 & 86 are the IDs for the coil. If the engine computer is commanding the fan on, you should see +14v on one of the coil contacts, and 0v (or nearly so) on the other. If the ECU is not commanding the fan on, you should see both at +14 (see note).

- 30 & 87 are the IDs for the relay's contacts. You'll have 14v on one of them (by convention the one marked 30) from the vehicle supply (battery/alternator) via the fuse. The other (by convention 87) should have 14v if the relay contacts are closed, and 0v if open.​

If you have +14 on both 30 & 87 with the relay closed, and no volts arriving at the fan, could be wiring. If +14 on one contact of the relay, and 0 on the other with the relay closed, could be burnt contacts in the relay.

I've attached the circuit schematic of mine - this likely won't be the same as yours but should illustrate the general idea. Note that mine has a 3-speed fan system: 'Low', 'High' and 'High 2', with 3 relays & a multiple-winding motor, which complicates things.

(Note: Assuming its the same convention as my Carnival - namely the relays have +V applied to one side of the coil, and the ECU electronics grounds the other side when it wants to activate the relay).

(Won't be at the desk tomorrow (Friday our time)).
 

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