Quote:
Originally Posted by BlueRunner428
So my 4Runner is push button start and from what I understand, you absolutely should NEVER try jumping another vehicle if yours is a push button start nor I believe getting a jump if yours is a push button start (not totally sure on the latter). The reason is because you run the risk of frying the electronics to the starter system or something. My question though is, can a portable jump starter pack be used on a push button start, or are those only safe to use on key turn ignitions?
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You are fine to use a jump starter if you hook it directly to the battery.
Where the issue of frying the electronics, comes mostly from hybrid vehicles. Lets take my Toyota RAV4 hybrid as an example. The 12 volt battery is in the back cargo area and hard to get to (especially if the battery is dead and you can't unlock the rear hatch). To jump start it, Toyota provides a jump start terminal in the engine compartment in one of the fuse boxes. You hook up the positive cable of your jump starter to that terminal, and the negative a place on the engine block. The problem is some people have been attaching the negative terminal to a ground point next to the fuse box that just happens to be the ground point for the engine/hybrid system ECU. The high current from the jump start then goes through the ECU and fries it. Toyota released a T-TT (Toyota tech tip) to address the issue reinforcing the rule to attach the negative cable only to the engine and not near the ECU.
