How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask lexpert Your Own Question
lexpert
lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 2100
Experience:  Master Certified with lexus, 8 years experience with Lexus
9414525
Type Your Lexus Question Here...
lexpert is online now
A new question is answered every 9 seconds

2008 Lexus is250 will not crank/start. I removed negative

Customer Question

2008 Lexus is250 will not crank/start. I removed negative battery cable for 30 seconds. Reconnected cable and car started , but died after 5 seconds. Tried to restart, but it will not crank/start. Tried to reset security described in owners manual, but still will not start.
Submitted: 1 month ago.
Category: Lexus
Expert:  david craig replied 1 month ago.

Hi Im David, thanks for visiting the site. does the red security light go out when attempting to start?

Customer: replied 1 month ago.
No. it is flashing
Expert:  david craig replied 1 month ago.

do you have another key?

Customer: replied 1 month ago.
but my daughter has it at her house.
Expert:  david craig replied 1 month ago.

that is going to be needed. until you try another key i wont be able to tell you if its an immobilizer issue or not. but let me look up a reset procedure for anyway..

Customer: replied 1 month ago.
Ok! She's bringing key after church service
Expert:  david craig replied 1 month ago.

ok great. the reset procedure is only to take it to the dealer and have them reset it with there diagnostic computer. sometimes disconnecting the battery (both terminal) touching them together for 15 seconds then reconnecting them works, but with a very low success rate.

Customer: replied 1 month ago.
Ok
Customer: replied 1 month ago.
Tried touching negative and positive for 15 sec. did not work
Expert:  david craig replied 1 month ago.

ok, has she arrived with the key yet?

Customer: replied 1 month ago.
Nope
Expert:  david craig replied 1 month ago.

ok .let me know and hopefully it works because i would hate for you to have to get it to a dealership and cost you more money.

Customer: replied 1 month ago.
Extra key would not work either
Customer: replied 1 month ago.
Dash board
Customer: replied 1 month ago.
Hello
Expert:  david craig replied 1 month ago.

sorry, had to run out with the family for a while

Expert:  david craig replied 1 month ago.

ok. one last try before sending you to the dealership. make sure the battery has a full charge of 12.5 volts

once you have a good level of charge in the battery try turning on the ignition for 6 minutes, then remove the key and then try to start the car again
the reason for leaving the ignition on for 6mins is so the codes in the anti theft ecu and your master key can resyncronise.
When this is complete the immobiliser light on the dash will go out. then you turn ignition off and you should be able to start the vehicle if there are no other problems.

Customer: replied 1 month ago.
I do not have a conventional key slot, just the start button
Expert:  david craig replied 1 month ago.

you'll just push the start button on and leave it that way for 6 minutes.

Customer: replied 1 month ago.
Ok!
Expert:  david craig replied 1 month ago.

when the 6 minutes is up ,push the start/stop button to off. then try to start.

Customer: replied 1 month ago.
Okay
Customer: replied 1 month ago.
Nothing changed
Expert:  david craig replied 1 month ago.

unfortunately you will need to have the vehicle taken to the dealership to have the immobilizer/ecm/transponder system reprogrammed. sorry i couldnt give you better news. we tried.

Related Lexus Questions