Part 2 of 3

Chart A-3 - Engine Cranks But Won't Run (Part 2 of 3):

Wiring Diagram for Chart A-3 - Engine Cranks But Won't Run:

Test Description (Cont'd): The following numbered steps correspond with the step numbers on the diagnostic chart.

7. Verifies ignition feed voltage at terminal "M" of the C3-I module. Less than battery voltage would be an indication of a CKT 839 fault.

8. The test light to 12 volts simulates a reference signal to the ECM which will result in an injector test light blink if CKT 430, the ECM and the injector driver circuit are all OK.

9. If the Cam Sensor signal circuit terminal "A" is jumpered to the ground circuit terminal "B", the response will be an injector test light blink. This is a result of this artificial "Cam Signal" being transmitted through the C3-I module to ECM terminal "A11" and the ECM activating the injector driver circuit.

10. Verifies a proper Cam signal circuit voltage of 6 to 9 volts and a good ground from the C3-I module to terminal "B" of the sensor connector.

11. Determines if reason for incorrect voltage reading was due to a fault in CKT 633, an open in CKT 632 or a faulty C3-I module.