1993 Toyota Previa

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MEMBER
1993 TOYOTA PREVIA

Electrical problem
1993 Toyota Previa

have a Toyota Privia that the battery was disconnected for awhile (weeks) when the battery was reconnected it will turn over but won't start. The book mentions a theft deterent system however nothing on how to reset it. I have tried to close all doors and use the key to in each lock locking and unlocking to try to reset but no change. Tested the electrical componets (distributor, coil, ect.). My problem is the ECM when I tested pins 4, 5, 17, and 18 of plug (D) which sends voltage to distributor and get 12volts, but when I reconnect plug (D) the voltage out of those pins is zero which leads me to believe that an input on plug (D) is causing this change. My question is there a theft deterent system that cuts this power and how do I reset it if there is? Any other thoughts on what it might be?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 in away from ground have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor /distributor pick-up coil, ignition control module, ECM, Ignitor camshaft and crankshaft sensors and computer. Note: If it doesn't apply disregard it