Start Signal

Backprobe ECM terminal No. 34 (G20) or terminal No. 43 (J30 and Q45) with positive lead of DVOM. See Figure or Figure . Connect negative lead to chassis ground. Turn ignition switch to START position, battery voltage should exist at ECM terminal. If battery voltage does not exist, check for open in wire between ignition switch and ECM. If wire is okay, replace ignition switch.