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Limp home mode 

 

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 Post subject: Limp home mode
Posted: Fri Apr 21, 2006 6:42 pm 
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1 question, Is there such thing as a engine going into limp home mode??? I thought limp home mode was the name givin when ur trans locks into third. my mate thinks otherwise.

 

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Posted: Fri Apr 21, 2006 6:54 pm 
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he says the "engine" limp home mode has somthing 2 do with the ecu and it makes ur engine run rough.

 

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Posted: Fri Apr 21, 2006 7:04 pm 
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You were right.. limp home mode is only for the transmission.

 

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Posted: Fri Apr 21, 2006 7:05 pm 
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fnp wrote:
You were right.. limp home mode is only for the transmission.
thankyou thats what i wanted 2 hear thanks mate.

 

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Posted: Fri Apr 21, 2006 7:30 pm 
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There are a few "Limp Home" modes I am aware of...

one for the auto
one for the MAF (V8's only)
one for the cooling system (AU I6 Only)

There are probably some more?
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Posted: Fri Apr 21, 2006 7:31 pm 
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xr8ute wrote:
There are a few "Limp Home" modes I am aware of...

one for the auto
one for the MAF (V8's only)
one for the cooling system (AU I6 Only)

There are probably some more?
ok what does each one do? apart from the auto one.

 

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Posted: Fri Apr 21, 2006 9:08 pm 
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limp home mode
2 i know of!

auto trans... P, R and 2nd gear only when there is a drama with the box ( ie loss of pressure/oil ) allowing u to get home

aui6 cooling , when the car gets too hot due to loss of coolant the ecu shuts down cylinders to allow travel to get car repaired, not on xr or lpg vehciles

 

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Posted: Fri Apr 21, 2006 9:59 pm 
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even the distributor has LHM (which is the stupid IMO but thats what they call it)

As far as limp home mode for the engine goes - fom the tech docs -

Limited Operation Strategy - Limp Home Mode (LOS) - In this mode of operation, the EEC-V provides the necessary outputs to allow the vehicle to Limp home, should an electronic malfunction occur in the PCM.
The Ignition Timing is fixed at 0* BTDC
The canister Purge is locked out
The Injector pulse width is fixed (Fuel flow constant)
For 6 cylinders, the Idle speed controller duty cycle is set to 75%
For V8s, there is no ISC duty cycle.
This gives a very rich engine characterised by black smoke from the exhaust.
Vehicle performance in this mode is substantially degraded although it may be driven up to 100Km/Hr

 

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Posted: Sat Apr 22, 2006 8:17 am 
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interesting thanks lads.

 

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 Post subject: limp home mode
Posted: Sat Apr 22, 2006 9:45 am 
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yeah my ebxr8 goes into limp mode all the time this seems to happen occasionaly when i turn the headlights on while driving,i notice it changes from 4th to 3rd.i just pull over turn engine off restart and its fine.started this since i fitted edxr lights.

 

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 Post subject: Re: limp home mode
Posted: Sat Apr 22, 2006 12:41 pm 
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ixlrate wrote:
yeah my ebxr8 goes into limp mode all the time this seems to happen occasionaly when i turn the headlights on while driving,i notice it changes from 4th to 3rd.i just pull over turn engine off restart and its fine.started this since i fitted edxr lights.


Check the battery connections, possibly a bad earth, or connection to the positive bus bar. You should also check the fusible links and relays near the battery, chances are something got disturbed when the lights went in causing the intermittent fault.
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 Post subject: limp mode
Posted: Sat Apr 22, 2006 2:12 pm 
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ok,i have to get an electrician to look at it as the high beam doesn't work,if i put high beam on all lights go out but if i flick it or pull towards me the highbeams comes on but the other lights turn off.

 

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 Post subject: Re: limp mode
Posted: Sun Apr 23, 2006 2:17 pm 
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ixlrate wrote:
ok,i have to get an electrician to look at it as the high beam doesn't work,if i put high beam on all lights go out but if i flick it or pull towards me the highbeams comes on but the other lights turn off.


i kinda had the same prob. check the circuit breaker

 

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