Operation CHARM: Car repair manuals for everyone.
Hosted by mcallihan.com

ECM (+B) Power Source Circuit

ECM Power Source Circuit

CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied to the coil, closing the contacts of the EFI relay and supplying power to the terminal +B of the ECM.

WIRING DIAGRAM





INSPECTION PROCEDURE

Step 1:





Step 2:





Step 3:





Step 4:





Step 5:





Step 6:





Step 7: