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What voltage is required to charge the battery in the Music Bullet

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Our 2007 Ford Freestyle 3.0V6 shows B1318 code, also scanner shows low battery voltage module. Car shuts off.Please help what to do to fix?


Which module ?

B1318 Battery Voltage Low Audio Control Module REFER to Section 414-00 . B1318 Battery Voltage Low DSM REFER to Section 414-00 . B1318 Battery Voltage Low DVD Player REFER to Section 414-00 . B1318 Battery Voltage Low Instrument Cluster REFER to Section 414-00 . B1318 Battery Voltage Low RCM REFER to Section 414-00 . B1318 Battery Voltage Low Satellite Radio Receiver REFER to Section 414-00 . B1318 Battery Voltage Low SJB REFER to Section 414-00 .
According to this charging system isn't working correctly ! This is a computer controlled charging system .
Principles of Operation
The powertrain control module (PCM) controlled charging system determines the optimal voltage setpoint for the charging system and communicates this information to the voltage regulator. This system is unique in that it has 2 unidirectional communication lines between the PCM and the generator/regulator. Both of these communication lines are pulse-width modulated (PWM). The generator communication (GEN COM) line communicates the desired setpoint from the PCM to the voltage regulator. The generator monitor (GEN MON) line communicates the generator load and error conditions to the PCM. The third pin on the voltage regulator, the A circuit pin, is a dedicated battery voltage sense line.
The charging system voltage is controlled by the PCM. The generator charges the battery and at the same time supplies power for all of the electrical loads that are required. The battery is more effectively charged with a higher voltage when the battery is cold and a lower voltage when the battery is warm. The PCM is able to adjust the charging voltage according to the battery temperature by using a signal from the intake air temperature (IAT) sensor. This means the voltage setpoint is calculated by the PCM and communicated to the regulator by a communication link.
The PCM simultaneously controls and monitors the output of the generator. When the current consumption is high or the battery is discharged (the PCM recognizes this and increases the output of the generator to accommodate), the system is also able to increase the idle speed to increase the charge.
To minimize the engine drag when starting the engine, the PCM does not allow the generator to produce any output until the engine has started. The PCM then progressively increases the output of the generator.
The PCM turns the charging system warning indicator off after the engine is started and illuminates it under fault conditions (when the generator is not generating the correct amount of current with the engine running). The charging system warning indicator is also illuminated by the PCM whenever the key is ON with the engine OFF.
This is a System 4 charging system, which uses the GEN MON and GEN COM lines to control and monitor the charging system through the PCM. System 4 charging systems are virtually identical in design and therefore, share the same diagnostics. The circuit numbers and colors may be different, but the functions are the same.

Jun 30, 2017 | Ford Cars & Trucks

1 Answer

My 1998 ford windstar hasnt ran for awhile. i got the altenator tested and replaced the battery, checked the fuses in the fuse panel, tested the relays and she still has a problem keeping battery charged...


Check the fusible link between the alternator thick red wire and positive terminal of the battery with the battery disconnected. If that's OK, compare the non-running battery voltage to the running battery voltage and see that it is about 12.7 volts not running and 13.7 to 14 volts running. If you don't see the higher voltages when the engine is running, your alternator is not producing the required charging voltage. At that point you need to determine if you are getting the field voltage to the alternator rotor which is the smaller wires on the alternator. The voltage will vary with the charging demand and electrical load on the system. These voltages come from the engine control module. The belt is turning the alternator, right!

Jan 23, 2016 | Ford Cars & Trucks

1 Answer

My s type 3 liter v6 petrol engine jag does not get driven very frequently,so battery seems to discharge very quickly,fires up fine on a jump start,but then dies after 20 seconds .can you put me rite.


Before jumping the battery, check it with a meter to see what voltage it is. For 12v batteries a fully charged battery should be 12.7 volts. Anything less that that will decrease it's starting capacity and likely cause it to develop a self destructive process if allowed to get below 12.4 volts. The more advanced a car is the more it seems to have parasitic loads that consume battery when the vehicle is supposedly turned off (car alarms, remote key-less entry and so on).

If you are going to leave any vehicle unused for any period of time that causes the voltage to fall below the 12.4 - 12.5 volt range you should do one of two things, either disconnect the battery (unless you need the car alarm) or put it on a battery maintainer (trickle charger).

Once the vehicle is running, make sure the alternator charging voltage measured at them battery terminals is in the upper 13 volt range, or you have a charging issue and only a new battery will be able to sustain the engine under that condition for any length of time. Vehicles with electronic controls require a battery voltage of a certain voltage or it will shut down.

If it isn't a battery issue, then you have a bigger problem I can't resolve for you. Before I forget, every attempt at starting ANY auto engine is going to require the car charging system to run several minutes to replenish what was used to for each attempt, my guess is about 10 - 15 minutes depending on the air temperature.

Jan 23, 2016 | Cars & Trucks

1 Answer

Alternator not charging


If the alternators are not exactly the same as the original then there may be a problem with the voltage regulator circuit. Some alternators have internal regulators and others have external regulators.. Check for fuses in the charge circuit . If the battery is faulty then the alternators will not charge any way. Have a load test done on the battery.. If ok check the wiring circuit as the alternators require battery voltage before they will charge (no residual magnetism in an alternator)

Jan 12, 2014 | Cars & Trucks

1 Answer

Test Alternator and voltage regulator


voltage regulators are inside the alternator now.. they are built in..operating voltage should be 14.5-16..depending on load requirements most tool shops have a battery tester that checks load and battery condition as well as charging of the alternator.. these go for about 25-50 bucks I use mine all the time..

Dec 27, 2013 | Toyota Cars & Trucks

1 Answer

I have a 2003 Chevy Venture. I ran my dome light and radio without starting my van. I came outside to a "dead" battery, I hope! The radio still turns on, but, the battery light won't turn off. I jumped the...


NICE TOUCH WITH THE CABLES BUT ALWAYS USE A METER FOR A COOL TWENTY BUCKS AT THE PARTS STORE TO SEETHE LEVEL OF THE BATTERY ABOVE AND BEYOND 12.90 VOLTS IS USUALLY REQUIRED BUT FULL CHARGE IS WHAT YOU NEED ALWAYS. IF THE CHARGE WONT HOLD ON A ACTUAL "BATTERYLOAD TEST" BITE THE BULLET AND GET A BETTER BATTERY

Aug 21, 2013 | 2003 Chevrolet Venture Passanger

1 Answer

Have New battery and Alternator, battery still won't stay charged.


Since you are having a new battery and alternator the charging circuit of the electronic charging unit is a possible suspect.
All what is required is to check the charging voltage when the engine is started, if there is no increment of voltage when the engine runs the alternator then the connection from the alternator must be checked. Check the output from alternator, check the relay box which contains the charging unit. It can be a failure of the rectification or the stabilising circuit, the unit must be replaced.

Sep 21, 2011 | 1993 Buick Park Avenue

2 Answers

Charge light on.bought a new battery its dead.could it be a fuse or a bad alternator


your alternater is shot bring it it to napa and order a new one its a common problem

Dec 21, 2009 | 1986 Toyota Pickup 4WD

1 Answer

Interior lights on but car wont start


STARTING YOUR DIAGNOSIS
What happens when you attempt to start the engine? If nothing happens when you turn the key,"http://www.aa1car.com/library/2003/us20310.htm"to determine its state of charge. Many starters won't do a thing unless there is at least 10 volts available from the battery. A low battery does not necessarily mean the battery is the problem, though. The battery may have been run down by prolonged cranking while trying to start the engine. Or, the battery's low state of charge may be the result of a charging system problem. Either way, the battery needs to be recharged and tested.
If the battery is low, the next logical step might be to try starting the engine with another battery or a charger. If the engine cranks normally and roars to life, you can assume the problem was a dead battery, or a charging problem that allowed the battery to run down. If the battery accepts a charge and tests okay, checking the output of the charging system should help you identify any problems there.
A "http://www.aa1car.com/library/2002/cm10220.htm" that is working properly should produce a charging voltage of somewhere around 14 volts at idle with the lights and accessories off. When the engine is first started, the charging voltage should rise quickly to about two volts above base battery voltage, then taper off, leveling out at the specified voltage. The exact charging voltage will vary according to the battery's state of charge, the load on the electrical system, and temperature. The lower the temperature, the higher the charging voltage. The higher the temperature, the lower the charging voltage. The charging range for a typical alternator might be 13.9 to 14.4 volts at 80 degrees F, but increase to 14.9 to 15.8 volts at subzero temperatures.
If the charging system is not putting out the required voltage, is it the alternator or the regulator? Full fielding the alternator to bypass the regulator should tell you if it is working correctly. Or, take the alternator to a parts store and have it bench tested. If the charging voltage goes up when the regulator is bypassed, the problem is the regulator (or the engine computer in the case of computer-regulated systems). If there is no change in output voltage, the alternator is the culprit.
Many times one or more diodes in the alternator rectifier assembly will have failed, causing a drop in the unit's output. The alternator will still produce current, but not enough to keep the battery fully charged. This type of failure will show up on an oscilloscope as one or more missing humps in the alternator waveform. Most charging system analyzers can detect this type of problem.
thanks,please rate the solution positively.

Nov 06, 2009 | 1985 Buick Century

1 Answer

1999 Ford F150, Charging system. Light continues to illuminate requiring electrical system service. replaced altenator. But continues to kill battery. Loss of all electrical power. What could be the...


Your battery may not be holding its charge. Charge the battery and take a voltage reading. Then after a few hours take another reading andsee if the voltage has dropped. If that is alright, refit the battery to the car. turn off all the electrics anddo a voltage test. If the battery is discharging then ou will have to find what componant is drawing the voltage. I normally check the boot through the rear seats first.

Nov 23, 2008 | 1993 Ford Escort 4 Door

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