Power Supply Check

Disconnect 6-pin connector from computer. Turn ignition switch on. Connect voltmeter positive lead to pin "D" of harness connector. See Fig 1. Connect negative lead to vehicle ground.
Crank engine, but do not start it. Reading again should be 9.5 volts or more. If so, proceed to next check. If not, check battery voltage, recharge battery, check lead wires from module to ignition switch.

Fig 1: Computer and Harness Connector Test Terminals Use this illustration for power supply, ground circuit, ignition coil feed, and connector checks.