Part 3 of 3

Chart A-3 (3 of 3):

Wiring Diagram For Engine No Start:

CIRCUIT DESCRIPTION:

Ignition voltage is supplied to the fuel injector through circuit 439. The injector will be pulsed when the ECM opens and grounds the injector drive circuit 467.


TEST DESCRIPTION: The numbers below refer to circled numbers on the diagnostic chart.

1. This test determines if the injector connector has ignition voltage, and only at one terminal.
2. A faulty ECM may result in damage to the injector.
3. A test light connected from the ECM harness terminal W1 to ground should light due to continuity through the injector.