Question about Lexus Cars & Trucks
1. Remove the battery and put it on a charger overnight, see if it holds a charge. If not repair the battery.
2. If the battery holds a charge, replace or repair the alternator' Good chance the brushes need replacing.
Posted on Apr 18, 2017
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Posted on Jan 02, 2017
SOURCE: Car wouldn't start couple of
theres a tsb for a faulty fuel pump........
Access the fuel pump connector.
Monitor voltage between the White/Red (WH/RD) and Black/Yellow (BK/YE) wires, leaving the fuel pump connected. Also monitor the fuel pressure.
Voltage will normally be about 6-8v at idle and will increase with load on the engine.
Drive the car to try and duplicate the complaint. When the problem is occurring, check the fuel pressure vs. voltage to the fuel pump. If pressure is dropping but voltage is the same or increasing, check the connections right at the fuel pump. If OK, drop the fuel tank, inspect the lines internally and replace the fuel pump as needed.
Posted on Oct 21, 2008
sounds like it's your alternator, your alternator charges your battery and runs car once it is started. if you have a bad alternator your battery light will come on, and shortly after your vehicle will die, unable to restart without a jump. I would take your battery to autozone or an auto shop to have your battery and alternator tested.
Posted on Jan 28, 2009
SOURCE: My master warning light appeared
well what happen is w/batery dead the computer detected a problem if battery is full now & cranking fine just reset computer unhook neg, cable this reset it they usaly reset thm self after 30-50 cranks if no problem is found
Posted on Dec 06, 2010
SOURCE: Saab 93 1.9 tid warning
The easiest way to check is with the car running, disconnect the positve side of the battery, if the car dies, then it is the altenator, if the car keeps running then it is the battery. If you have a volt ohm meter, check the chrge going to the battery you should get between 12 and 14 volts if it is lower than 12 you have an altenator issue. the altenator should always produce enough to charge the battery and run the car at the same time, if not then the battery wears down.
Posted on Mar 13, 2011
SOURCE: Daughter called me ..car wont
it sounds like you have blown fuse to the Alternator.. I don't know what car you are talking about but they charging systems vary.. But if alternator isn't getting all the power it needs it won't charge. this should be checked.
Posted on Oct 21, 2011
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It does sound like the alternator isn't working. Did you have to jump the vehicle or charge the battery to get it to start back up? If you did not have to do either the possibility of the alternator working is good. The car will run with less power in the battery then what it takes to start the car. If you did not have to jump or charge battery to get it started again you might be better of checking for loose or corroded connections and most likely a maim power cable or wire. A bad diode in the alternator can also cause what you described due to the alternator putting out an AC current the computers and electrical components won't work right they were built to handle DC current. If you don't have the proper test equipment to test for AC current just disconnect the alternator while the car is acting up and if ever thing goes back to normal you will know it is the alternator. You are going to need at least a volt meter. The voltage while the engine is running should be 14 to 14.8 volts.
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