2016-2017 Toyota Mirai EV Control ECU Software Update Recall H0X

OishiiJPN

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Subject:
Special Service Campaign H0X
2016 – 2017 Model Year Toyota Mirai
EV Control ECU Software Update

Condition:
The subject vehicles are voluntarily equipped with an event data recorder (EDR). The EDR only collects, stores, and allows retrieval of vehicle event data, including crash events. It DOES NOT control the operation of the vehicle or any crash safety systems. Due to a software error, the EDR data for “Accelerator Pedal, % Full” will show a constant value of “0,” and will not record another accelerator open position at the time an event is recorded. No other system uses this software output data.

Remedy:
Toyota will send an owner notification by first class mail starting in mid-January 2018, advising owners to make an appointment with their authorized Toyota dealer to have the EV Control ECU software update performed at NO CHARGE.

Covered Vehicles:
There are approximately 2,500 vehicles covered by this Special Service Campaign. Also, note that no vehicles
covered by this Special Service Campaign were distributed to Puerto Rico.

Owner Letter Mailing Date:
Toyota will begin to notify owners in mid-January 2018


Frequently Asked Questions

What is the condition?
In these vehicles, there is a software error that causes the event data recorder (EDR) to record an incorrect
value for one data item. The EDR records data for various events, including crashes, and is used to help
investigate those events. It does not control the operation of any vehicle systems.

What are the technical details of this issue?
The subject vehicles are voluntarily equipped with an event data recorder (EDR). The EDR only
collects, stores, and allows retrieval of vehicle event data, including crash events. It does not control
the operation of the vehicle or any crash safety systems. Due to a software error, the EDR data for
“Accelerator Pedal, % Full” will show a constant value of “0,” and will not record another accelerator
pedal position at the time an event is recorded. No other system uses this software output data.

What is the Event Data Recorder (EDR)?
The EDR collects, stores, and allows retrieval of specific vehicle sensor data in a crash or near-crash
event. The EDR DOES NOT control the operation of the vehicle or the crash safety systems.

What are the symptoms of this condition?
After a recorded event, if someone retrieves the data recorded in the EDR, the accelerator pedal position will
show an inaccurate reading .

What is Toyota going to do?
Toyota will send an owner notification by first class mail starting in mid-January 2018, advising owners to
make an appointment with their authorized Toyota dealer to have the EV Control ECU software update
performed at NO CHARGE.

Which and how many vehicles are covered by this Special Service Campaign?
There are approximately 2,500 vehicles covered by this Special Service Campaign. Also, note that no vehicles
covered by this Special Service Campaign were not distributed to Puerto Rico.

How long will the repair take?
The repair takes approximately one hour. However, depending upon the dealer’s work schedule, it may be
necessary to make the vehicle available for a longer period of time.

What if I have additional questions or concerns?
If you have additional questions or concerns, please contact the Toyota Customer Experience Center at
1-888-270-9371 Monday through Friday, 7:00 am to 7:00 pm, Saturday 7:00 am to 4:30 pm Central Time.
 
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