What happens if the fuel gauge reads zero?
If the fuel gauge reads zero, it won’t start. If you have disconnected the battery or it has lost some voltage your ECU will shut down, when you switch on you need to tell the ECU that there is fuel available. The ECU can only check the fuel if the fuel is moving about (don’t ask why).
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.
How are virginize keys stored in the ECU?
The virginize keys are values that are “10” in the original dump but must be changed to “00” to tell the computer to go into auto-programming mode. The Key counter is a number count, in inverse HEX, of how many keys are currently stored in the ECU.
Why is the transponder ECU under the dash?
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. However its location under the dash means you will have to remove the entire dash pad.
The virginize keys are values that are “10” in the original dump but must be changed to “00” to tell the computer to go into auto-programming mode. The Key counter is a number count, in inverse HEX, of how many keys are currently stored in the ECU.
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.
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. However its location under the dash means you will have to remove the entire dash pad.
Is there a way to reprogram an immobilizer?
The procedure for reprogramming is similar, however you will have to short two wires on the OBDII port to perform a hand-shaking procedure between the ECUs to program new keys. Here’s what the immobilizer system components look like. Here’s a closer look inside the transponder amplifier.