SL/R230: STARTER BATTERY NOT CHARGING
02-10-2023, 08:29 PM
#26
Junior Member
vin # WDDNG7EBXBA372226
If I may ask you a huge favor while you're at , I need to replace the serpentine belt (belt drive) and I couldn't find any right up on it, if you can post the PDF I would really appreciate it
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Xguy (02-13-2023)
03-29-2023, 12:50 PM
#28
Junior Member
Hello again and thank for your help the last time, I'm facing another issue and I posted a request in the forum but no buddy responded so I thought I'll reach out to you again , I need to replace a thermostat and it's not very easy to do on the 157 engine if I can bother you again and get the PDF on it, I would really appreciate it, you have my vin in the above post thanks in advance
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Xguy (03-29-2023)
06-29-2024, 06:56 PM
#31
Hi i have put some new prefuses in because of corrosion i was tracing a no crank no start issue and after changing the fuses the starter battery has no power at all any advice please?
i had both batteries disconnected
i had both batteries disconnected
06-29-2024, 10:29 PM
#32
Senior Member
Thread Starter
Does the starter turns the engine with batteries fully charged? If not, Are the batteries fully charged? If the engine turns, then check the Crankshaft position sensor! Is fuel getting into the cylinders? Fuel filter clogged? Are the any sparks? There are many tests to do to determine the root cause by eliminating obvious causes..!
06-30-2024, 04:42 PM
#33
Does the starter turns the engine with batteries fully charged? If not, Are the batteries fully charged? If the engine turns, then check the Crankshaft position sensor! Is fuel getting into the cylinders? Fuel filter clogged? Are the any sparks? There are many tests to do to determine the root cause by eliminating obvious causes..!
06-30-2024, 05:20 PM
#34
Senior Member
What do you mean by the starter battery has no power?
Have you measured battery voltage, and drop load voltage/amps?
Consumer battery is needed to power up all the modules so a bad consumer battery can cause no cranking, but if the rear battery is only discharged slightly, then the BCM would bridge the two batteries together to enable starting.
Have you measured battery voltage, and drop load voltage/amps?
Consumer battery is needed to power up all the modules so a bad consumer battery can cause no cranking, but if the rear battery is only discharged slightly, then the BCM would bridge the two batteries together to enable starting.
07-02-2024, 12:45 PM
#35
Senior Member
Thread Starter
gOrsq, I do not think that the "consumers" battery could start the engine if the starter battery is depleted...! Figure the amps needed to be handle by K57...! And the BCM has no power circuits to allow heavy loads through! If a little boost is needed, I can believe that, but essentially most of the juice has to come from the starter battery!
Also see the Gauge of the wires connecting the BCM with the starter battery....not sufficient to handle the starter motor amps..!
Also see the Gauge of the wires connecting the BCM with the starter battery....not sufficient to handle the starter motor amps..!
07-02-2024, 01:45 PM
#36
Senior Member
Who said it would?
I said the STARTER battery would be used to boost the consumer battery, so the essential systems could function, including the ignition and starter systems, and hence enable the car to start.
The relay and cabling would still need to carry a high current, but only for a very short time.
I don't think the system is functional the other way, but I don't know.
On a side point, have you seen the small jumper packs, which can be used to start a car with a flat battery. They only have small terminals and cables!
This is because a battery that can not start a car still has a lot of power in it. It's just the voltage which is too low to move the amps.
The jump packs just boost the battery voltage by adding enough current to get the voltage high enough to crank the engine. On their own the can't start a car, they still need the power remaining in the low battery.
I said the STARTER battery would be used to boost the consumer battery, so the essential systems could function, including the ignition and starter systems, and hence enable the car to start.
The relay and cabling would still need to carry a high current, but only for a very short time.
I don't think the system is functional the other way, but I don't know.
On a side point, have you seen the small jumper packs, which can be used to start a car with a flat battery. They only have small terminals and cables!
This is because a battery that can not start a car still has a lot of power in it. It's just the voltage which is too low to move the amps.
The jump packs just boost the battery voltage by adding enough current to get the voltage high enough to crank the engine. On their own the can't start a car, they still need the power remaining in the low battery.
