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A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

Ford, Air Bag Light Flashes 52

Q: My air bag light on my Ford flashes a code 52 which I have been told is due to a low battery signal. I have replaced the battery and cable but the light still flashes 5 then 2 times when I start and then stays on. Is there a way to reset this or is it a Dealer thing?

- Larry W.

A: Sorry to say, you're servicing the wrong battery . In fact, it isn't even a battery it is a capacitor that is located inside the air bag's diagnostic monitor (AKA computer). When you turn the ignition switch on the air bag computer monitors the voltage at this capacitor. Within about 45 seconds there has to be about 23 volts (yes 23 volts) present. In the air bag computer there is a voltage boost circuit that provides the extra kick to turn the voltage up to that level. The capacitor is a storage device or back-up power supply for the air bag system. If the voltage doesn't reach the correct level the air bag warning light will flash code 52 to alert you that the air bag system is not operating correctly. To find the cause for the failure or bad part will require some diagnostic time.

 
     
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