Please help all came on while wife was driving she shut it off now it will not start 2000 Toyota LandCruiser 4.7
Battery, a/t p, a/t oil temp, vsc trac, check engine and vsc light
- Thread starter ExtremeCruiser92
- Start date
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First get a code reader, most autoparts store will let you borrow one. Post up with hell codes the collective will translate.
Dead battery.
Vehicles that have lots of computers require a specific amount of voltage, get to far below that range and the dash will light up like a Christmas tree.
1-charge the battery
2-have battery tested
3-have alternator tested
Please report back once all sorted.
Vehicles that have lots of computers require a specific amount of voltage, get to far below that range and the dash will light up like a Christmas tree.
1-charge the battery
2-have battery tested
3-have alternator tested
Please report back once all sorted.
- Thread starter
- #4
Yes Ac delco battery bit the dust with in a year getting a die hard Monday blue top here I come thanks for all the info
Disconnecting the battery while running in any modern vehicle is a really bad idea. In the engineering world it's referred to as "load dumping" and it potentially induces damaging transient voltage and current spikes into the vehicles power and control systems. It proves nothing really and risks significant damage. There are plenty of SAE papers on EMC and its testing that explain the issues. I know many of us have swapped batteries in older running vehicles, boats, farm equipment etc with no ill affects but for modern ECU controlled vehicles its not best practice.
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Semantics.
I said theoretically it can be done, because the alternator provides enough juice to run the components AND charge a battery at the same time. Did I at any point encourage someone to do it?
If the engine is running with a properly functioning alternator OP wouldnt have a Christmas Tree condition.
OPs battery might just need a charge after the alternator is replaced.
No not semantics. Theoretically and practically ECU vehicles should never have their battery removed whilst running. The reason being the instantaneous removal of the load the battery presents to the charging system and the alternators intrinsic delayed reaction time when the load is removed can result in significant, damaging transients. These transients are normally clamped to something like 30v or 40v peak, but transient spikes in the order of 100v peak can be anticipated. Nothing to do with the output "juice" capacity of the alternator being able to theoretically run the vehicle without a battery fitted. Have a great day.
I do agree that the alternator will need testing, but agree that theory would tell you not to disconnect the battery when the engine is running, practically you could do it with a risk of damaging stuff. So install the new battery and test the charging circuit using proper testing methods.
Yes. You're splitting hairs. AGAIN, I never told OP to remove it. I was stating an alternator regardless of battery health will produce enough voltage to keep that from happening.
I am saying ALL OF YOU telling OP he needs a battery are off base.
When you jump a dead battery what happens? Your car starts running and the voltages will be normal.
Did the battery instantly charge to 100%? No the alternator is providing the voltage to run the vehicle AND charge the battery.
You could be encouraging him to replace a battery that might not be bad.
I NEVER said to disconnect it so just drop it. You're wrong. Get over yourself.
I am saying ALL OF YOU telling OP he needs a battery are off base.
When you jump a dead battery what happens? Your car starts running and the voltages will be normal.
Did the battery instantly charge to 100%? No the alternator is providing the voltage to run the vehicle AND charge the battery.
You could be encouraging him to replace a battery that might not be bad.
I NEVER said to disconnect it so just drop it. You're wrong. Get over yourself.
