Engine Control Module: Specifications

ECM CONNECTOR "A" (GRAY):

ECM CONNECTOR "B" (RED):

ECM CONNECTOR "C" (GREEN):

ECM CONNECTOR "D" (BROWN):

CAUTION: DO NOT BACKPROBE ECM CONNECTORS!

This Chart may be used in conjunction with the T-1OO Yellow Breakout Box (BOB) 48921 to obtain voltage present for each circuit listed. Install the BOB between the ECM harness connectors and the ECM, then probe the pin listed under "BOB PIN#". Voltage may vary due to low battery charge or other reasons, but should be very close. All voltages shown in the ENG "RUN" column are typical with engine at idle, closed throttle, normal operating temperature, park or neutral, system in "Closed Loop," all accessories "OFF," and scan tool NOT installed.

DVM NEGATIVE LEAD MUST BE CONNECTED TO A KNOWN GOOD GROUND.