Where is the transponder ECU on a Lexus?
On newer Toyota and Lexus vehicles, the transponder ECU is a separate unit and it’s housed under the dashboard. The reason for separating the Transponder ECU with the EEPROM storing the keys is that in the invent of lost keys, it would be cheaper for a dealership to replace the Transponder ECU than the Engine Control Unit.
What happens when you reset the ECU on a Lexus?
The ECU stores diagnostic trouble codes when it senses a malfunction so a mechanic can fix it later. It’s also the ECU’s job to store your driving data to customize your ride. For around the first 1,000 miles of the ECU being reset, the car adjusts to the driver’s typical driving style.
Can You virginize the ECU on a Toyota?
While taking the car to a dealership or locksmith is an option, it could get expensive because you are at their mercy. What follows is a cheaper method you can do yourself to “virginize” your ECU to accept new keys. Here’s an overview on how the immobilizer system works on older Toyota and Lexus vehicles.
Where is the fuse box on a Lexus ECU?
Disconnect negative battery cable. This is the recommended way. It’s the easiest, there’s no risk of getting shocked by the battery, and it requires no special tools. All you need to do is remove and then re-install two fuses. Locate the fuse box under the hood on the passenger side near the strut tower.
What does the ECU do on a Lexus?
This article applies to the Lexus IS, GS, RX, ES (2004-2014). The engine control unit, or ECU, is basically the brains of your car. The ECU stores diagnostic trouble codes when it senses a malfunction so a mechanic can fix it later. It’s also the ECU’s job to store your driving data to customize your ride.
Disconnect negative battery cable. This is the recommended way. It’s the easiest, there’s no risk of getting shocked by the battery, and it requires no special tools. All you need to do is remove and then re-install two fuses. Locate the fuse box under the hood on the passenger side near the strut tower.
Is there a way to reset the ECU?
This is the main way to reset the ECU. Be warned that going this route will clear out all presets including those for your radio, seats, navigation, etc. This is the easiest option and potentially the most annoying because it forces you to reset the settings.