Frequently asked questions
Locks after a battery change, dealer costs, 68 series support, and refunds.
My navigation unit asks for a password after a battery change. What do I do?
Disconnecting the battery triggers the security lock on Toyota navigation units, and the unit asks for the password set when it was first installed. Even if you do not know it, ERC Calculator can issue an unlock code as long as the unit shows its 16-digit security release code (ERC).
How much does a dealer charge?
Dealers and garages typically charge around ¥2,000 to ¥4,000 and take about 30 minutes. You need an appointment, and same-day service is not always possible. The app issues a code immediately.
I bought the car used and do not know the previous owner's password.
You do not need the password itself. As long as the unit can display its 16-digit security release code, an unlock code can be issued. After unlocking you can set a new password of your own.
Do you support the 68 series (NSZT-W68T and other 2018-onward models)?
Yes. NSZT-W68T, NSZT-Y68T and NSZN-Z68T are supported, as are NSCN-W68 and NSLN-W68. On the three 68T units, if the code does not match, a hybrid code is issued at no extra cost.
Where do I find the 16-digit security release code?
Hold the Menu (or Info, Settings, or Map) button on the unit while switching the headlights ON and OFF three times to enter the diagnostic screen. Go to Service Information, then Enter the Security Release Code, and the 16-digit code appears. The how-it-works page shows each step with photos.
Do hybrid vehicles need a different code?
On the 68T units (NSZT-W68T, NSZT-Y68T, NSZN-Z68T), hybrid vehicles can need a different code. If the first code does not work, the app issues a hybrid code once, at no extra cost. There is no extra charge and no form to fill in.
The code did not unlock my unit.
First check the 16 digits you entered: confusing 0 with O, or 1 with I, is the most common cause. Next, on a 68T unit, try the hybrid code. If it still fails, check that the map SD card is seated and the 12V battery voltage is healthy, then contact support.
Can I get a refund if it does not work?
Apple reviews and processes refunds for in-app purchases. The app opens Apple's refund request screen directly. We support you from the request through to the result.
Is this an official Toyota service?
No. This app is not affiliated with, endorsed by, or partnered with any vehicle manufacturer. Model numbers are used only to identify compatible units. Use it only on a navigation unit you are lawfully entitled to use.
Still stuck?
If your question is not here, get in touch and we will help.