Technical P0481 fan relay 2

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Technical P0481 fan relay 2

Dave01

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2002 warning light on fault code P0481 fan relay 2
checked wiring
i am looking for a ecu pin out for this unit to check the wiring to the ecu
ecu is a bosch unit 0281010346 EDC15C7

dose anyone have a pin out of this unit ?

Dave
 
Dave,

1. Which version Ducato x244 or x230?

2. Which engine?

3. More importantly by pin out, do you mean the pin numbering scheme, or the pin allocation?
 
x244
2.0 d

looking for wiring pin out on the ecu to cooling fan relays
 
Dave,

If your vehicle has an ECU, then it must be JTD.

Therefore I assume 2.0JTD


Wiring details are included in eLearn, which is available from the downloads section. However the two copies of eLearn to which I have access exhibit stupid errors in the pin numbering for the larger connector "A".


The following is from my own CD copy, and may refer to a later variant.

RAD 1 or relay T06 is controlled by a negative from the ECU on relay terminal 85. This signal connects to the engine bay fuseboard via connector/pin A21 on a yellow wire. Likewise RAD 2, relay T07 control signal enters the fuseboard on A28, on a Grey/Black wire.

The above two signals leave the ECU on A19, and A20 respectively.

Now for the difficult part. Connector A is the larger one, with a total of 81 pins. For the purposes of explanation sketch the connector with 5 large pins at the RHS (arranged like 5 spots on a domino). To the left of this pattern there are 4 rows of 19 pins.

The large upper right pin is 1, with 2 adjacent on the left, and pin 3 in the middle of the domino pattern. These 3 are shown as having thick black (negative) wires attached. The lower two pins of the domino pattern are 4 and 5 counting from the right.

The 76 smaller pins count from the left. Bottom row 6 to 24, then 25 to 43, 44 to 62, top row in sketch 63 to 81. (eLearn has nonesense for the last two rows.)

Pin A20 will be in the middle of the bottom row.

Perhaps this link will help but it is for the 2.8JTD. http://4cardata.info/elearn/244/2/244000001/244000003/244000005/244003452
 
Hi, I don't wish to hijack this thread, so tell me off if applicable!
I've got the same P0481 fault showing up on my 2008 2.3 multijet motorhome.
Dashboard engine fault light (MIL?) on continually.

I have a iCarsoft CR Pro scanner - this is the only fault showing when scanned and when cleared the MIL returns immediately.

So far I've check the fuses and relays - all ok, and if I short across the relay pins (in the engine bay fuse block) I can run the two fans - thus proving the wiring to the fans and the earth.
I've yet to prove the wires back to the ECU because I'm not sure what I'm looking for at that end...
If my interpretation of the wiring diagram is right then the 2 wires that control the switching of the relays should have 0 volts normally and go to earth when made active by the ECU ?
Any ideas as how to get this fault cleared would be greatly appreciated.
 
thanks for your help
all sorted now
wiring colors completely different but the pin out for the main A plug spot on #
rewired and all good now
 
thanks for your help
all sorted now
wiring colors completely different but the pin out for the main A plug spot on #
rewired and all good now
I Have exactly the same fault on 2004 Fiat ducato mk11,244, 2.0jtd can you explain a none electrical, The fix and how did the problem came about,
 
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