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View Full Version : Hard brake and MMT problem


sceh
10-28-2019, 12:15 PM
Yaris 2005 with MMT.
Today, and not for the first time, I had the MMT warning light and the flashing N but the car started at least? Switched off and tried again but the brake pedal is suddenly rock hard and the car will not start no matter how much I press the pedal.

Any ideas? Not sure the two issues are directly related but who knows? Certainly not Toyota...

B.B._07
10-28-2019, 05:37 PM
Looks like this is a common problem for the Toyota Multi-Mode Transmissions (aka sequential manuals) offered in Europe in which the MMT clutch actuators fail resulting in the flashing N. There is a company in the UK that rebuilds these actuators which is cheaper then buying a new one.

https://www.ecutesting.com/common-faults/toyota/toyota-mmt-clutch-actuator-fault/

sceh
10-29-2019, 03:52 AM
Does this also explain why the brake pedal is hard? After about 15 minutes, all returns to normal and I can press, the brake and start the car and go