Auto battery saver 2014,12v battery halfords jobs,used batteries for sale montgomery al 5k,ez car rental orlando discount code - Test Out

25.11.2014
Disconnecting or replacing a battery on a computer-equipped vehicle may cause starting, driveability and a number of other problems, including loss of air conditioning, power accessory functions (door windows, seats, sunroof), false warning lights, even damage to certain electronic modules! One of the things I wanted to do with the article was list all of the vehicle applications that have known battery disconnect issues.
On vehicles with known battery disconnect issues, there should be a big red warning label on or near the battery to warn people. Warning: Disconnecting the battery to reset the PCM on a growing number of late model (2003 and newer) vehicles can do more than erase the Keep Alive memory. Also Note: Disconnecting the battery will NOT allow a vehicle to pass an OBD II plug-in emissions test. Erasing the PCM's adaptive memory may also affect the way the transmission shifts and feels.
It resets the FMEM (Failure Mode Effects Management) module on certain late model Ford vehicles.
It resets the ABS (Antilock Brake System) and SIR (Supplemental Inflation Restraint) or airbag modules. Chevy Tahoe Loss of voltage to the vehicle electrical system causes the 4WD module to go to sleep permanently.


Toyota (various models) If the battery is disconnected while the key is on, it can set a fault code for the airbag system and turn on the airbag warning light (which deactivates the airbag system until the fault is cleared with a scan tool). Subaru (various models) Disconnecting the battery can trigger the anti-theft system, preventing the vehicle from starting when the battery is reconnected. Honda (various models) Disconnecting the battery will set a code and turn on the air bag light (which also disables the airbag system). WARNING: Regardless of the year, make or model of vehicle NEVER disconnect the battery while the engine is running or the ignition key is on. If a battery has to be disconnected prior to doing electrical work on a vehicle (which is highly recommended to prevent an accidental short that might damage wiring or modules), or if an old or weak battery is being replaced, voltage MUST be maintained to the PCM and other modules while the battery is disconnected. Voltage to the PCM and other modules can be provided by connecting a 12v backup power supply to the battery cables, using jumpers to attach another 12v battery to the battery cables, or plugging a small 9 volt battery Keep Alive Memory (KAM) saver into the cigarette lighter or a 12v power receptacle. The Schumacher OBD Memory Saver Cable is another handy device for preserving learned data, stored codes and programmed electronic settings such as clocks, radios, seat positions, keyless entry systems, alarms and more. The Keep Alive Memory chips in most modules require very little current to retain their settings, anywhere from a few milliamps up to 10 to 15 milliamps depending on the module. Many modules have internal timers that either turn off the module to put it into a "sleep mode," or power down the module to a "standby mode" to reduce the parasitic power drain after a predetermined length of time when the key is turned off or the vehicle's occupants leave the car.


As a rule, the parasitic drain on most late model vehicles should be less than 50 milliamps one hour after the vehicle has been shut off and left undisturbed. Keep in mind, though, that opening a door, the trunk or turning anything on can wake up various modules and start the timer countdown all over again.
If replacing a battery (new or used), make sure the battery is FULLY CHARGED before installing it. Connect the POSITIVE (+) battery cable first (which may be color coded RED), then the NEGATIVE (-) GROUND cable last (which may be color coded BLACK). It can also erase vital learned information that is absolutely necessary for other modules to function normally.



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