What else could it be ?

robbie_998

Power steering fail on start up / no power steering.

Works when car is turned off and on again.

07 Honda civc hath 1.4

So far the eps control unit has being replaced.
Battery replaced.

What else ?

It works fine once it's on but its the start up that's the problem.

They said the battery had a slight discharge so they gave me a new one.

Possibilities ?

Chimaera

Has there been any attempt at systematic fault finding here, or is it another case of throw parts at it until the problem goes away?

To clarify the issue: the power steering works when the car is running but does not work when the car is being started?

If this is the case, it sounds like perfectly normal behaviour to me: the starter circuit cuts power to everything except the engine ECU and the starter motor to make it easier to start the car. This will include the power steering motor. If I've misunderstood your description then I apologise.

Without access to diagnostics, I'd point my finger at the load reduction relay or the relay for the EPS motor if it has one. If the relay is getting stuck open or closed intermittently, it could cause this sort of behaviour.

robbie_998

Chimaera wrote: »

Has there been any attempt at systematic fault finding here, or is it another case of throw parts at it until the problem goes away?

To clarify the issue: the power steering works when the car is running but does not work when the car is being started?

If this is the case, it sounds like perfectly normal behaviour to me: the starter circuit cuts power to everything except the engine ECU and the starter motor to make it easier to start the car. This will include the power steering motor. If I've misunderstood your description then I apologise.

Without access to diagnostics, I'd point my finger at the load reduction relay or the relay for the EPS motor if it has one. If the relay is getting stuck open or closed intermittently, it could cause this sort of behaviour.

I can see what you say there.

It does have a Electric Power Steering Control unit and it was replaced already even if the first one was not defective.


What happens is i get into the car. start engine and start driving. while doing this the power steering is off and the screen says "Check System" but if i turn the car off and power it back up again it would be fine again.

they did try for system diagnostics and did not immediately find an issue. they suggested the most logical explanation was the EPS Control unit so it was replaced.

the next time they tested the battery and it was found to be slighty discharged so they charged it - no joy so they replaced it with a brand new battery.


i will point out this is all done under warranty so im not paying a cent for any work done here... they even threw a half a tank in my car last time

robbie_998

just wanna give a quick bump before i throw it back into the garage tomorrow.

anyone any suggestions ?


cheers all

analfabets

robbie_998 wrote: »

just wanna give a quick bump before i throw it back into the garage tomorrow.

anyone any suggestions ?


cheers all

Could it be starter motor withdrawing too much electric current. EPS will usually quit if voltage drops below certain point so at the moment you start your car, starter motor takes more than it should, voltage drops, EPS disingages. Just guessing

barura

Wouldn't it still have a relay to do the heavy current switching? Perhaps that?

robbie_998

analfabets wrote: »

robbie_998 wrote: »

just wanna give a quick bump before i throw it back into the garage tomorrow.

anyone any suggestions ?


cheers all

Could it be starter motor withdrawing too much electric current. EPS will usually quit if voltage drops below certain point so at the moment you start your car, starter motor takes more than it should, voltage drops, EPS disingages. Just guessing

This is what I've being told myself by the guys in the dealer that the eps is hyper sensitive to power

Given the correct battery put into the car would it be resolved ?

I noticed the battery they put into my car is 12V but the amps are a lil lower for (ah)

Effective ?

robbie_998

barura wrote: »

Wouldn't it still have a relay to do the heavy current switching? Perhaps that?

The relay... I haven't had any other problems nor any other warning messages.

Still possible ?

barura

I'm sorry, I don't know your car well enough to speculate any further. If the relay was faulty, it might only turn on for a certain amount of time and get knocked off by something such as heat... I can't really help you on your problem though, just noting a possibility.

listermint

robbie_998 wrote: »

This is what I've being told myself by the guys in the dealer that the eps is hyper sensitive to power

Given the correct battery put into the car would it be resolved ?

I noticed the battery they put into my car is 12V but the amps are a lil lower for (ah)

Effective ?

Yeah power is an extremely important part and delivery on startup is vital piece of the puzzle especially in newer more sensitive vehicles.

Its crazy but the battery could be the root of your problems here.


Power delivery sequence can also be a difficult one to attribute too, even with Diagnostics.

robbie_998

Dealer just rang me there and told me their doing a Software update on the car straight from honda (probably all civics) and that work is being doing on my car. will get details when i go to them after work.


would software be the issue ?

thanks again all