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PB -PC Challenger 2009 - 2014 Covering 2.5 HP diesel

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Old 28-04-17
Flatbiskit Flatbiskit is offline
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Default PC Stability control fault

Hello all, I am having an issue with my PC challenger and am looking to see if anyone here has had something similar as Mitsubishi are running out of ideas.

Apologies straight up as this will be a bit long but there is no way to avoid it to explain what is going on.

When driving normally, or a bit less than that as my son gets motion sickness and driving slow helps, when you turn into a corner the traction control/stability control light on the dash flashes and the ABS goes nuts on the front wheels. It is worse in hilly conditions, and towing seams to make it worse again, such as the clide mountain between canberra and batesmans bay.

Now the thing that is making it harder to diagnose is, it will not do it at round a bouts, sharp corners, normal around town driving etc. It will do it at Highway on ramps and the like but not much more around the city limits. It has done it from the day I picked up the car, but it would only do it once every 6 months and I could not make it do it so I did not worry about it.

Now it is doing it all the time.

Mitsubishi dealer could not get it do it so I took them for a drive and it did it and now they can get it to do it on comand. But with the MUT plugged in all the sensors etc are operating normally and with in spec. They have been in touch with the technical deparment at Mitsubishi and they dont know....

My dealer has deamed the car unsafe to drive at the moment as with each activation of the system it seams to be a bit worse, so I'm with out a car and as any one who is self employed and needs the car for work will know that sux.

So if anyone has any ideas please let me know.

Thanks Geoff
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Old 28-04-17
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itsamitsi itsamitsi is offline
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Yep mine does it too zipping around the hills. I believe it to be the suspension lift topping out and lifting a wheel which it thinks is slipping so activates the trac to stabilise the vehicle. It is annoying and has caught my wife out a few times. The only way I can see it getting fixed is remove the lift or lower it 1" which should be enough.
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Old 28-04-17
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I get a similar occurance, on windy roads and only on right hand bends, the abs or stability control activates, gives me the shits.
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Old 28-04-17
Flatbiskit Flatbiskit is offline
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Hey Itsamitsui and PeePee.

I agree the lift makes it worse, when mine went in (also Ultimate suspension) it was a 3" lift and it was much worse. I called them and they dropped it by about 1.25" and it was much better, back to how it was before the lift.

But the car has been doing it since new and the lift only went in in November last year.
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Old 28-04-17
Flatbiskit Flatbiskit is offline
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My dealer has also stated that it is worse when turning to the right which is what I told them.

But evey so often when turning left the rear brakes only will activate.
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Old 28-04-17
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1. What are the front and rear ride heights, centre hub to under wheel arch.
2. Do all 4 tyres have similar tread depth?
3. What are front and rear tyre pressures?
4. Does this still happen when the ASC is manually selected "OFF".
5. Has Steering Angle sensor been checked and calibrated?
6. Has Yaw Rate /G Sensorbeen checked and calibrated?

OJ.
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Old 28-04-17
Flatbiskit Flatbiskit is offline
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Hi OJ.

See below please



Quote:
Originally Posted by old Jack View Post
1. What are the front and rear ride heights, centre hub to under wheel arch.
Will have to measure when I get the car back. It is with Mitsubishi. But from memory when it was done they were all very similar.

2. Do all 4 tyres have similar tread depth? Yes they are only 15,000km old .
3. What are front and rear tyre pressures?Running 38PSI all round. I have played with this and it does not seam to make much difference to the traction control coming on.
4. Does this still happen when the ASC is manually selected NO but mitsubishi tell me you cant turn it completly off."OFF".
5. Has Steering Angle sensor been checked and calibrated?Unsure but they have had the MUT connected to the car all day and travelled approx 150km.
6. Has Yaw Rate /G Sensorbeen checked and calibrated?Same for above.

OJ.
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Old 28-04-17
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4. Does this still happen when the ASC is manually selected "OFF" NO but mitsubishi tell me you cant turn it completly off."OFF".

Well that is a load of BS and does not inspire confidence in their ability!

The ASTC system is a combination of stability and traction control, there is a button on the lower dash by your right knee, once the engine is running if you push this button then the ASC portion of the system is disabled until you stop and restart the engine of exceed 120kph, there will also be a yellow "ASC OFF" light illuminate on the dash display. By turning the ASC "OFF" you can eliminate the Steering Angle, Yaw Rate and the G Sensors so if the problem continues then it is a Traction Control problem. As others have suggested if your from ride height is too high then you have none or little downward suspension travel so when you corner the wheel can lift off the ground. When this happens the traction control system apples the brake to the lifted wheel and if the ASTC ECU decides it will also cut engine power.

OJ.
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Old 28-04-17
Flatbiskit Flatbiskit is offline
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Quote:
Originally Posted by old Jack View Post
4. Does this still happen when the ASC is manually selected "OFF" NO but mitsubishi tell me you cant turn it completly off."OFF".

Well that is a load of BS and does not inspire confidence in their ability!

The ASTC system is a combination of stability and traction control, there is a button on the lower dash by your right knee, once the engine is running if you push this button then the ASC portion of the system is disabled until you stop and restart the engine of exceed 120kph, there will also be a yellow "ASC OFF" light illuminate on the dash display. By turning the ASC "OFF" you can eliminate the Steering Angle, Yaw Rate and the G Sensors so if the problem continues then it is a Traction Control problem. As others have suggested if your from ride height is too high then you have none or little downward suspension travel so when you corner the wheel can lift off the ground. When this happens the traction control system apples the brake to the lifted wheel and if the ASTC ECU decides it will also cut engine power.

OJ.
Hey OJ

I think I got that mixed up. it is the traction control that is never completly off.

They have not blamed the the lift or any of the other mods to date so finger crossed they keep looking.

I think you are on to the money for the way to diagnose if in ASC or traction control thanks. I will rase it with them on monday.
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Old 28-04-17
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Traction Control is turned "OFF" when the Rear Diff Lock is engaged.

OJ.
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