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Lexus will not start

Replaced battery and will not start tried to recycle security system by turning ignition on amd off 3 times and still will not turn over. was running perfect this morning

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  • Cars & Trucks Master
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Hi there:
You will have to pinpoint what the engine is missing...
- Spark
- Fuel
- Compression

All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the engine to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should.

Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Feb 13, 2012

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My '98 GMC Jimmy's security light flashes & I can't start my engine! I'm the owner & am using the original ignition key!


How many miles on the vehicle ? Thing's wear out , thousands of times of put the key in an turning it .

Have you tried to do a relearn ?

30 Minute Procedure
Ensure that the battery is fully charged.
Use a scan tool in order to clear the Passlock™ DTCs.
Turn the ignition switch from the OFF position to the CRANK position, and then to the RUN position.
The vehicle will start and then stall.
Leave the ignition ON until the security telltale turns OFF in 10 minutes.
Repeat Steps 3-5 for 2 more times (3 times total)
The Passlock™ controller will learn the new data on the next start attempt.
Use a scan tool in order to clear all DTCs.

Don't worry about the scan tool part , just do the relearn . If that doesn't work you will probably have to take it to a dealer .

DTC B2947 Security System Sensor Power CKT Low
DTC B2948 Security System Sensor Power CKT High
DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Sec Sys Sensor Data Incorrect but Valid
DTC B3031 Security System Controller in Learn Mode
DTC B3033 Security System Indicates Tamper

If the relearn doesn't work one of these DTC'S - diagnostic trouble code's is stored .

Mar 08, 2017 | 1998 GMC Jimmy

1 Answer

Car Battery


You have probably triggered the antitheft system.

Relearn Procedure

  1. Turn the key on, with the engine OFF.
  2. Try to start the engine, then release the key to ON, Engine will not start.
  3. Watch the security telltale, after about 10 mins, it will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes. You must turn the ignition OFF for 30 seconds before attempting to start the vehicle after the 3 cycles. Then start the engine .

If that doesn't work go to this link http://vatspasslockpasskeysecurityhelp.yolasite.com/

Feb 04, 2014 | 2002 Oldsmobile Bravada

1 Answer

Lexus ls 400 1996 flat batteriy ok now but security light on found away to start the car but every time i turn the key off securty light comes back on


FLAT batterY?? Battery OK,now? New one? Old one OK?HUH?
Get security codes FIRST: radio and NAV.
Disconnect battery from car and wait for 30 seconds and turn on the headlight switch,DURING the battery disconnect.
Turn off the headlights and reconnect the battery.
the security system should "re-boot" and be happy.
then there is the radio issue, Get the code.....

Nov 14, 2012 | Lexus Cars & Trucks

1 Answer

My 97 lexus es 300 alarm went off. I immediatly put the key in the ignishon. Soon as I tried to start my car the theft system would not let me turn it on although the radio head lights and other things...


Some vehicles will allow you to start and drive (temporarily) by switching the ignition key between 'Off' and 'Run' or 'On' several times (common is three) in quick succession. You would however, at least have to repeat it every time you wished to start the car. Disabling the security system could be quite difficult since they really are intended to make a vehicle unusable.

Apr 17, 2011 | Lexus ES 300 Cars & Trucks

1 Answer

My security light in my car is on what does that mean?


There is a problem with the theft system. This is the system that pervents the car from starting if the ignition lock cylinder is damaged when someone trys to steal the car.
You can try and do a relearn, it may let the car start after this relearn. The most common cause for this concern is the ignition lock cylinder, it has a computer sensor inside that goes bad, you have to replace the cylinder and program it.
To reprogram/relearn, put on the parking brake(this will keep the headlights from comming on and draining the battery), try to start the car, leave the key in the "on" position. The security light should no be flashing. Wait for tem mins, the light should turn off. At this time, turn the key off for 2 seconds and try to restart. At this point, the car may start, if not let the key stay in the "on" position again for tem mins untill the light turns off. Again turn the key off and try to start the car. It may take 3 times for the system to relearn, if you try 3 times and still no start, you will have to replace the ignition lock cylinder.

Jun 04, 2010 | 1995 Buick LeSabre

1 Answer

Car won't start after setting off alarm


locate the alarm module below the hood.

there us a switch comming off it..


press it 3 times, turn on ignition,, press switch 3 times,, press door lock switch (on side of door senesor) 3 times..

Reset..


Check your main engine fuse..

Mar 17, 2010 | Lexus ES 300 Cars & Trucks

1 Answer

Turns over upon starting, but will not ignite.


what you need to check is to see if the security light goes off when the key is inserted to make sure the key is still programmed to car when in ignition. Then the basics for a car starting: air, fuel, compression. couldbe alot of things but check the timing on the car, incase it jumped a tooth or timing belt broke. May need tune up: spark plugs. please post more information about problem with car. also check battery cables for corrision.

Oct 06, 2009 | 2002 Lexus LS 430

1 Answer

2001 lexus ls430. Dead battery at airport. jumoers turned over starter fine but car would not start and no dashboard lights, fan, radio but driver and front passenger windows and doorlocks worked but not...


Sounds as though when your battery died the engine imobiIiser locked down.
YOU MAY HAVE TO HAVE THE CAR TOWED TO A LEXUS DEALER AND HAVE THE MASTER KEY AND OTHERS REPROGRAMMED TO THE IGNITION...BUT
If you have your wallet key as well , try taking all to the airport. HOLD the card to the dash beside the ignition for at least 20 seconds, then try turning the key several times. I haven`t done an LS but the failsafe when a remote fails is to hold the key beside the ignition for at least 20 seconds ....
Also try the lock routine, but I think the issue is in dash..security needing to reboot to your key.
My understanding is that the lock routine re initialises the lock setstings when power is restored

Sep 21, 2009 | Lexus LS 430 Cars & Trucks

1 Answer

After replacing battery engine won't idle.


SOUNDS LIKE THE SECURITY SYSTEM ON THE CAR NEEDS TO BE RESET SOMETIMES THIS CAN BE DONE BY CYCLING THE KEY BACK AND FORTH IN THE IGNITION 3 TIMES THEN START IF THIS DNT WORK THEN CHECK WITH YOUR LOCAL TOYOTA DEALER FOR DETAILS

Jun 24, 2009 | 2002 Lexus ES 300

3 Answers

The Lexus car remote key control model ES300


try this:

1. Start with key out of ignition, drivers door is open all others closed and
drivers door is unlocked.

2. Insert key into the ignition (DO NOT Turn) and Pull key out.
3. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Close, then open drivers door.

4. Perform these steps within 40 seconds.
A. Using the power lock switch on the drivers door, perform 5 lock/unlock cycles
starting with lock. Use an even pace and try to go about one cycle per second.
(1Cycle = 1 lock and 1 unlock).
B. Insert the key in the ignition cylinder.
C. Turn the ignition to ON (Do NOT Start) then back to OFF.
D. Remove the key from the ignition.

5. Press any button on remote for a minimum of 1 second.
System should now lock and unlock doors once.

6. Close and open drivers door.

7. Press any button on remote for a minimum of 1 second. System should now lock and
unlock doors. Once to confirm programming, twice to indicate programming failed.

8. Repeat steps 5, 6 and 7 for additional remotes.

Mar 23, 2009 | 1997 Lexus ES 300

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