2009 Yaris MMT does not drive, gear indicator missing

[automobilklub]

Hello to all fellow forum members.

As per title - I have bought a 2009 Yaris with the gearbox issue with intention of geting it repaired and giving it to my wife. She is not aware of it yet as this supposed to be a gift...

Anyway, as a kind of specialist in repairing Honda Civic semi auto gearboxes I truthfully thought I can tackle this low mileage (38k) Yaris with ease...

Upon inspection I checked the engine, which starts and gets up to temperature with no problems whatsoever.

BUT the gearbox does not select gears and there is NO gear indicator displayed on dash. Been told by previous owner that both actuators have been reconditioned by specialist company (BBA Reman) and refitted to the car.

This caused the gear indicator to disappear and Techstream reports error code P0808 (clutch position sensor high signal). Don't know the initial problem that trigered the repairs. 

Now I am able to use the paper clip trick and try the gearbox initialization and getting all the "beeps" as supposed to but the indicator remains blank, actuators don't move and error stays. if I try the clutch clamp position procedure all I'm getting is three beeps in a loop after the gear lever goes back to "N" at the end of sequence.

The clutch actuator is of hydraulic type if this makes any diferrence, fluid level is correct.

I assume the clutch actuator has lost the position value as the clutch clamp position has not been done before actuator removal but how do I get out of this now?

Honda's are much more simple really...

　

thanks in advance

[Justhandguns]

It's getting very technical.... When you got the car, besides from 'conditioning' the actuator, did they mention anything about the MMT ECU? 

[Gerg]

I was interested in sending a part (nothing to do with MMT) to BBA Reman a few months ago, so I googled them to find their contact details.  My search inadvertantly pulled up some unhappy customer reviews that had been posted on a couple of sites, and also some reviews on what it is like working there.  Not as positive as you might hope. I'm sure that the condition of the MMT actuators is an unknown that you have considered.

[automobilklub]

Well, BBA gives lifetime warranty on their jobs so I would rather not suspect them to mess it up...

And - NO nothing about the ECU as you only send them the faulty actuators for reconditioning. Could the ECU be the culprit here?

Would any other ECU work out of box or needs programming?

Thanks

[Devon Aygo]

Before looking to replace an expensive ECU register and spend a few quid to access Toyota's technical repair manuals at www.toyota-tech.eu as all the checks for P0808 look at the clutch stroke sensor and only if it and the wiring connections check out does the MMT ECU become the culpritt

[automobilklub]

Hi. Managed to plug the diagnostic in...

Can somebody have a look at the values? Especially clutch clamp and standby positions, difference of over 20mm isn't too high? Is my clutch cooked? Also gear indicator shows 6th gear in 5 speed gearbox ...

Gearbox is in neutral despite computer readings btw as the car rolls

Any thoughts?

Thanks

[automobilklub]

Right. Been  while but managed to sort the problems eventually...

Replaced the clutch kit and traced broken wiring to the clutch actuator position sensor. Result - learning successful first time and car drives great now. Thanks for all your suggestions and help!

[Rafi]

I m having the exact same problem. I am thinking whether to replace the whole clutch actuator assembly or just the stroke sensor which is on the clutch. 

My car is 1.4 d4d semi automatic diesel 2006. 

I do get a light on the dashboard for the clutch. When it’s on the car does not shift into gears, when it goes away i can drive it for few minutes or maybe few days tben stops again randomly in the traffic lights on while driving it just goes back to N. Sometimes i have to wait a day or few minutes before it starts working again.

it is so frustrating me. Clutch actuator cost over 400 and I don’t trust second hand one.

maybe just he stroke sensor? PleAse help. You said you had a broken wire as well?  Maybe I Have it too.

[automobilklub]

Hi Rafi.

In my case it was combination of the two - clutch and the wiring. I have checked the continuity of each sensor wire and found two open. Replaced with new wires and the car works since. Try learning procedure from youtube (yaris mmt adaptation) and check all grounds just in case. Thanks

[Jrd]

On 5/27/2018 at 8:20 PM, automobilklub said:

Right. Been  while but managed to sort the problems eventually...

Replaced the clutch kit and traced broken wiring to the clutch actuator position sensor. Result - learning successful first time and car drives great now. Thanks for all your suggestions and help!

Hey I have the same it my car do not go in gear and the N do not come up I have no throttle but the starts can you help 

[automobilklub]

Try the learning procedure. You will find it on Youtube.

[Jrd]

I try that but still nothing

[Sad]

How to check the grounds .

Any luck Rafi and jrd

 

My actuator has gone off to bba reman. Mine used to come stuck while first starting up and car just stationary. Then after changing clutch as I thought it was that. Still happened only just really hot and been driven loads. .

I pulled the actuator off to grease it when put it back on now the car is stuck in N and doesn't shift. 

I hope they fix the actuator otherwise my car is doomed 

[Mikethemechanic]

Hello I have the exact same problem please could you tell me where you found the broken wires thanks Michael. 

[Behringer]

On 11/16/2018 at 8:52 AM, automobilklub said:

Hi Rafi.

In my case it was combination of the two - clutch and the wiring. I have checked the continuity of each sensor wire and found two open. Replaced with new wires and the car works since. Try learning procedure from youtube (yaris mmt adaptation) and check all grounds just in case. Thanks

Hello, can you tell us how did you checked the continuity of each clutch actuator position sensor wires? How did you replace the new wires? Which wires? Thank you.