01 Tacoma hit a bump and blew many fuses. Replaced all and now Isolating each component and inspecting wiring and connectors and now blowing ECM Powered fuses. Just got ECM repaired. It had 2? Burned diodes. It still blows the 7.5 amp IGN fuse at the interior fuse panel. I'm a master level technician and so far it is not obvious.
JA: Have you checked the manual yet? Most vehicles have two fuse panels.
Customer: Yes it has also blown the 20 amp underhood EFI fuse. Ive unplugged the igniter module, cruise control, coils, IAC, MAF, and going for oxygen sensors
JA: Are you fixing your Tacoma yourself? What have you tried so far?
Customer: Yes Ive also unplugged the transmission relay and HVAC control. The cluster was not blowing any fuses when the ECM was out and it seems to operate. The motor will crank but it blows ECM power fuses. This appears to be a pattern failure on this truck. I am reading the information listed on this page and appreciate the help.
JA: Anything else you want the mechanic to know before I connect you?
Customer: The alternator
regulator connector is also unplugged to isolate the "dead short" It was a Clear day when it happed 2 months ago. And when it blew all the fuses, the positive battery terminal seemed to be zapped too. That's all repaired properly now. It is a 2001 v6 manual trans 4x4. 210,000 miles. It cranks but won't fire with no power to the ECM. THANK YOU!