[mai_d_hoan]

Thank you Ed. I measured the B+ and it's a short node there. Was the short you find inside the engine or on the passenger compartment near the ECM ? I checked the wiring harness around and on the top of the timing belt cover, nothing glaring. I've tried the wiggle test around the intake manifold and other places to see if I can get the voltmeter to read from 0 to 12V but nothing.

 

[mai_d_hoan]

Seems to be somewhat common on 'Yotas for some reason, but not that prevalent...So keep me informed, if you will. Thank you

Thanks Ed. I've got a meter on the B+ diagnostic port and another meter on the other end of the EFI fuse. They register and fluctuate between 1.9v-2.1v with the ignition key in the ON position. I did the wiggle tests around the cable harness from the ECM, on top of timing belt, connections isolated from the IAC, MAF sensor, IACV, Crankshaft position sensor, & around the alternator, .
Strange.

HoanM.

 

[mai_d_hoan]

I had to call a mechanic out. He found that the alarm system was bad and pulling the EFI fuse to blow. He removed the alarm and no more blown fuse. I looked thru the schematic but nothing was referred to the alarm using the EFI leg circuit.