Part 2 of 2

Chart A-3 - Engine Cranks But Will Not Run (2 Of 2):

Chart A-3 - Engine Cranks But Will Not Run (2 Of 2):

CIRCUIT DESCRIPTION
This chart assumes that battery condition and engine cranking speed are OK, and there is adequate fuel in the tank.


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

1. No fuel spray from one injector indicates a faulty fuel injector or no ECM control of injector. If the test light "blinks" while cranking, then ECM control should be considered OK. Be sure test light makes good contact between connector terminals during test. The light may be a little dim when "blinking." This is due to current draw of the test light. How bright it "blinks" is not important.
2. CKT A6 supplies ignition voltage to the injectors. Probe each connector terminal with a test light to ground. There should be a light "ON" at one terminal. If the test light confirms ignition voltage at the connector, the ECM injector control CKT D16 or D14 may be open. Reconnect the injector, and using a test light connected to ground, check for a light at the applicable ECM connector terminal (D16 or D14). A light at this point indicates that the injector drive circuit involved is OK.

If an ECM repeat failure has occurred, the injector is shorted. Replace the injector and ECM.