toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Standard Value of ECM Terminals|Page 250 > < Standard Value of ECM Terminals|Page 248
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Engine Control Module: Testing and Inspection
Related Diagnostic Procedures

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 terminals +B of the ECM.

WIRING DIAGRAM 

Step 1

Step 2

Standard Value of ECM Terminals|Page 250 > < Standard Value of ECM Terminals|Page 248