20 Most Recent 1991 Lexus LS 400 - Page 5 Questions & Answers

i have done a many of these on your type of car its a lil more difficult. you will have to locate it and get to it the best you can take a sharp object,preferably a small chizzle and pop a hole in it once you have a hole you can slowly start to pry down ward to try and pop it out once you have it out they offer a universal freeze plug at the autozone's i recommend the universal it'll be alot easier to put in....good luck

Fuel Pump it's inside of the fuel tank.

It is simple and complicated at the same time; do not do it by yourself since you may brake the fuel line and it will need to be replaced entirely. My advice is, go to the dealer, it pays to have peace in mind

I don't know about back seat access, but you may have a feasible idea about the 12volts -maybe. Does your vehicle have a button on the dash to pop the trunk?? If so, that button works with the ignition switch in the 'on' position. Obviously you can't use the button since you can't turn the ignition to on. However, if you can get to the contacts of that button, you may be able to energize the trunk opener. Hopefully there are only two wires on that button switch, which will simplify matters. If you take a wire from the Positive battery terminal to the button switch, you may be able to energize the opener. If it's a two terminal switch, one side or terminal is power (12v) in, and the other terminal is 12v out. If you put 12v to one terminal and nothing happens, push the button. Can you pop the hood to get to the battery???? If not any 12v battery can work, lawn mower battery, etc. : Negative terminal of battery to car frame, positive to switch. This would be a low current draw, so the wire can be anything like speaker wire. Since the wire is live, just be careful not to have it touch any other bare wire connections or part of the frame, etc.If this works, it will probably set off the alarm, since the ignition switch is off. I really don't know if this will work, but if I was in this dilemma, I would try it. After all said and done, someone might be able to tell you how to access the trunk by way of the back seat. GOOD LUCK!!!!!!!!!!

run fault codes as it is controlled by the TCM

be a fuse or relay or the switch..

NOTE: C means "to coil"

fuel pump relay failing when gets hot .solder cracks open up when hot .and close when cold.

That sounds very much like fuel contamination

Anti-Deterrent ECU:This is also possibility especially someone else drive your car. This is very common if you lend your car to someone. The symptom of this condition is "No noise or sound at all" when ignition key is turned. If this is faulty, the symptom will be the complete ignition kill. Therefore, you will not heard and clicking sound or engine turning at all. If this is the problem, you can easily reset the Anti-Deterrent by using your key. Stand out side of the car and close all doors. Insert the key into the driver side door and turn the key to clockwise and counterclockwise for three four cycles. Basically, you are lock, unlock for 4 times and this procedure will reset the anti-deterrent ECU. If this happen to you, its quite scary at first, but the solution is very simple.

try your fuel pressure regulator.some time it can get damaged when there is no fuel in the system. may have stuck shut.