MMT Actuator problem

[Rods74]

Hi everyone,

I recently bought a Toyota Aygo MMT with a gearbox issue. I connected it to a diagnostics computer and received the following error message:

"Automatic transmission control unit
Permanent fault. Clutch actuator motor signal."

I have already replaced the actuator with a known good one, as well as the gearbox relay and checked all the fuses. However, the same fault persists. Additionally, when I run a gearbox actuator test, it shows as successful but none of the actuators actually move.

I would greatly appreciate any assistance or advice you may have.

Thank you!

 

[Rods74]

Sorry wrong image uploaded. 

[flash22]

It's maybe a dead MMT ecu, more than likely the outputs have been fried

i take it you have done a full relearn

INF12215_GB.pdf

CP-0009T-0113-EN (2).pdf

[Rods74]

Thank you for your advice. I've noticed that the gearbox ECU has a two-digit number. Is it necessary for these numbers to match on the replacement?

[silva1kr]

Rods74 slightly off topic but did the car give you any warning before it did this? Was it driving fine beforehand?

[Rods74]

17 minutes ago, silva1kr said:

Rods74 slightly off topic but did the car give you any warning before it did this? Was it driving fine beforehand?

I purchased the car with the problem Silva1kr

[silva1kr]

12 minutes ago, Rods74 said:

I purchased the car with the problem Silva1kr

Interesting. Check out Vak_service on youtube, really knowledgeable guy on these MMTs, made loads of videos on nearly all the faults this gearbox can have. 

[flash22]

What is the part number on the current one and your replacement?

it should start with 89530-70

[Rods74]

Thanks, I will have a look. 👍

[Rods74]

Flash22. I haven’t purchased one yet, I just wanted to check. So the last 3 digits are irrelevant? 

[flash22]

there are early and late mmt ecus and replacement parts

it should start with 89530-70xxx  the last 3 digits are important, please post the part number on your unit iirc it lives under the dash on the driver's side

 

[Rods74]

My number is 89530-70021.
 

I appreciate all the help 👍

[Rods74]

5 hours ago, Rods74 said:

My number is 89530-70021.
 

I appreciate all the help 👍

@Flash22

[flash22]

The updated mmt ECU for your car will be 89530-70100