GSbby300

I was sitting in my car and after a while battery needed a jump because it wouldn't start so I mistakenly put the negative to positive and now all I get is my headlights, interior security roof lights, my start button glows green, I can turn on the reading light but nothing else work and it won't start not even my remote works. I've changed the battery but still the same please help.

RXGS

iTrader: (2)

Check your fuses

GSbby300

I di and replaced the bad ones

MJG87

There is a chance you have damaged your ECU by connecting the battery the wrong way. Try checking every single fuse and replacing any that are broken. Disconnect the battery, turn your headlights on and hold the brake pedal down for approx 2 minutes to drain any residual charge out of your cars electronic systems. This will reset the ECU which may help with your issue. If that doesn't help you may need to run diagnostics on it and see if you get any error codes that can help show your problem.

GSbby300

ok i will do that now

MJG87

Good luck mate. let us know how you go. Something simple that can always be a drama, is not having your battery terminals tight, make sure you do that, plenty of people forget that, I have been guilty.

GSbby300

that didnt work

MJG87

Sorry to hear. Short of making sure all you fuses are fine, including the big black ones that need to be checked with a multi-meter I can't help. It is not uncommon for an ECU to be damaged or go into a "limp" mode when a battery is hooked up backwards. Do you have any error lights on the dash?

MJG87

Check the fuse layout in your owners manual if you have one. Starter fuse or EFI fuse could be fried.

GSbby300

thanks I've figured it out see below

GSbby300

So Lexus told me it wasn't fuse #6 Lexus Is charging 170 to diagnose the problem plus repair fees my accelerator won't give gas when I push but it gives a high rpm of like 15 20mph any suggestions

MJG87

Best possible outcome, better than a bricked ECU. Fortunately you have a well built and cleverly engineered vehicle, the fuses done their job as a sacrificial failsafe. I would try not driving it until you have replaced that other fuse. Go through the procedure I mentioned above to reset the ECU and hopefully everything goes back to normal.

GSbby300

yea I am fortunate and ok will do

Gavn

HI. Will this technique reset TPS warning also? (Just a stab in the dark) Vehicle is a 2006 GS 4.3.

MJG87

There is a chance it may, and for the 5 minutes of work it is worth a shot. Remember though, if it resets the error it will likely reappear before too long, it is only a temporary fix and you may need to fix the actual issue.