No Start Test
1) Turn ignition off. Disconnect coil "horseshoe" shaped connector from coil, and vehicle harness from ignition module (4-wire connector). Check resistance between coil connector "Tach Test" terminal and ground. If resistance is less than 1 k/ohm, go to next step. If resistance is greater than 1 k/ohm, MCU is okay.
2) Disconnect vehicle harness connector at MCU. Measure resistance between pin No. 8 of harness connector and ground. See Fig 1 . If greater than 1 k/ohm, replace MCU and retest. If less than 1 k/ohm, repair circuit from MCU to ignition coil connector and retest.