Question about Lexus ES 300
I assume that Ginko helped you with your other questions and your new question is where you can get a code reader for your 1993 Lexus. That being said, you (or your mechanic) can purchase one here:
The cost is only $25 so it's not bad. Let me know if you have any further questions and thanks for using FixYa!
Posted on Jul 18, 2009
If car drain up when you leave it parked, then it is not the alternator.
The alternator only affects the battery recharge, if battery stays charged for a while then alternator is OK, the problem is a parasitic drain somewhere in wiring, or a faulty battery that does not hold charge.
Think that the battery is OK is not enough. The battery must be tested replacing with a different one to check if it holds charge, a battery with shorted cells can cause the drain.
To test if it is a parasitic drain, use a new tested battery and leave the car parked with battery unplugged.
If it does not drain up, then you have a parasitic drain.
To measure drainage remove ignition key, connect the amp meter between the battery positive wire connector and positive terminal.A couple of milliamps drainage is normal, and is caused by instruments, car stereo memory, ECU etc.
Start removing more fuses , and open the wiring at different points , trying to locate the problem.
Remove the fuses and see if you have drain by connecting a meter to read amps on battery, if you have drain with no fuse, then the problem is insulated to wiring harness before the fuse, with something shorted between the battery and the fuseblock.
Regarding the other problem, the best thing to do is testing the car computer with a code reader, many faults can cause the same problem, and the ECM (computer) scan can tell you if the problem is related to vacuum system, misfire, faulty TPS etc.
Posted on Jul 18, 2009
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Posted on Jan 02, 2017
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