What happens if you have a bad alternator on a Subaru Impreza?
As described above, a bad alternator will drain your Impreza’s battery fast. When the battery gets so dead it will no longer be able to power your Impreza’s ignition system. As the ignition system is no longer able to produce a full powered spark, the engine will begin to sputter and stall.
Is there a software upgrade for the Subaru alternator?
Subaru Foresters do apparently have an ECU software upgrade available from the Subaru dealer, but for all the other models there is no software upgrade fix so the following work around procedure can be performed. Locate the park light wire in the plug to the ECU, normally thin Black with white traces (but double check!)
Why is my alternator not turning on in my Subaru Forester?
The ECU must be fooled into thinking there is always a load present so the alternator cutout function does not turn on. Subaru Foresters do apparently have an ECU software upgrade available from the Subaru dealer, but for all the other models there is no software upgrade fix so the following work around procedure can be performed.
Can you change the accessory belts on a Subaru Impreza?
Here is how to change the accessory drive belts on a Subaru Impreza car. It is easy to do a belt change and a belt adjustment on the Subaru Impreza. There are just a few small simple tricks you need to know about how it is all constructed. Subaru Impreza has 2 Accessory drive belts, and you should replace both of them at the same time.
As described above, a bad alternator will drain your Impreza’s battery fast. When the battery gets so dead it will no longer be able to power your Impreza’s ignition system. As the ignition system is no longer able to produce a full powered spark, the engine will begin to sputter and stall.
What should the voltage be on a Subaru alternator?
Charge the battery again and start the car. Then, with the engine running at around 1000 rpm, measure the voltage across the battery — should be around 14 V, but I suspect you will find it lower.
The ECU must be fooled into thinking there is always a load present so the alternator cutout function does not turn on. Subaru Foresters do apparently have an ECU software upgrade available from the Subaru dealer, but for all the other models there is no software upgrade fix so the following work around procedure can be performed.
Here is how to change the accessory drive belts on a Subaru Impreza car. It is easy to do a belt change and a belt adjustment on the Subaru Impreza. There are just a few small simple tricks you need to know about how it is all constructed. Subaru Impreza has 2 Accessory drive belts, and you should replace both of them at the same time.