The output for relay circuit 87 fault?

[Lee44]

Hi guys,

Does anyone know what this fault code means from STAR? Ive looked all over tinternet and cant find any answers!?

P068500 The output for relay circuit 87 (combustion engine) has an electrical fault or open circuit.

Thanks...

 

[AMGeed]

Are you sure that is the exact code?
It doesn't even appear in the list I have seen below
http://www.mbclub.co.uk/forums/engine/167900-full-diagnostic-trouble-codes-list.html

 

[Lee44]

I think so..

As per piccy attached.

 

[AMGeed]

^ Can't argue with that.
Hope someone can assist you with this.

 

[Lee44]

Yeah me too... It was erased before looking into what it could be?

Im hoping its just a faulty relay, if so which one and what is it for?

 

[television]

There is no circuit 87, 87 usually relates to a 12v pin number.

 

[Roxie]

Terminal 87 relay is in the front sam. But this is the output to the relay and not a relay fault. It is probably just that the relay was slow to switch or be switched by the cdi. If you are not having problem starting then I would not worry too much.

 

[Philedge]

Terminal 87 relay is in the front sam. But this is the output to the relay and not a relay fault. It is probably just that the relay was slow to switch or be switched by the cdi. If you are not having problem starting then I would not worry too much.

Surely that fault is telling you theres a fault with the wiring or the relay coil reistance is out of spec? If things are still working its a early warning.

 

[mattkh]

Terminal 87 relay is in the front sam.

Hi
Is this relay called by any other name or is 'Terminal 87' the real name.

 

[Lee44]

Aaah right, thanks.
Could this fault potentially cause a short? What relays are in that SAM? ie what do they work?

 

[television]

You really cannot use circuit 87, 87 refers to every ECU and relay, 87 is the live feed on all.

 

[Lee44]

So there's a possible fault somewhere, right? Possibly in that full circuit or live feed "to all"?
Its used the words (Engine Combustion).

 

[television]

I do not think it possible for all, just where the fault is. On the test is should say what relay, most relays pass the voltage on pin 87 to the part that needs it or has been called. A horn relay has a pin 87, so does a fuel pump relay and all others, is there a fault on the car.

 

[Lee44]

LoL.... Look at my last Thread, it paints a picture or two unfortunately

 

[television]

We need to know what the actual fault is on the car, what is it doing.

 

[Lee44]

We need to know what the actual fault is on the car, what is it doing.

Malcolm, my car has had many faults in the past 12 months, all of them solved on here, except one. The fault is on my last thread http://forums.mercedesclub.org.uk/showthread.php?t=139637&page=1 where it mentions the jerking/hesitation. Ive eliminated lots except boost pressure and THIS Fault code from STAR, which was overlooked.

Im beginning to wonder if the "Circuit 87 fault" could be arcing, causing the jerking. Or is this something total different and yet another fault to add to my list?

 

[television]

You will hate me after this, there is a circuit 87 relay, this is on the diesels I have seen some circuits, but not this so something new to me. this relay is for the engine ECU

Its the N10/1kn I will post back


I feel terrible over this

 

[television]

I cannot see what it does but you have the number N10/1kn


I will go away and hide my head

 

[Lee44]

HaHa...

Hey no problem at all Malcolm, we are all friends on here (I hope)

 

[television]

HaHa...

Hey no problem at all Malcolm, we are all friends on here (I hope)

Thank you,,,if the relay was arcing, that could cause hesitations and jerks.