No Start Test
This test identifies faults in the MCU only, not other causes of No-Start condition.
- 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 1000 ohms, go to next step. If greater than 1000 ohms, MCU is okay.
- Disconnect vehicle harness connector at MCU. Measure resistance between pin 8 and ground. If greater than 1000 ohms, replace MCU module. If less than 1000 ohms, repair circuit from MCU module to coil connector to ignition module connector.