p0200 code 03 Savana Van..no inj. signal on #2 - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-13-2016, 08:49 PM   #11
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Guess what? I discovered this afternoon my volt meter was malfunctioning and giving me some erroneous readings....when I grabbed another, it was spot on..... I got 12 volts at the pink wire, and nothing at the green/black wire with KOEO. Continuity on the green/black wire was fine...... therefore, I'm leaning toward a problem with ECM. Thanks.
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Old 03-14-2016, 05:47 AM   #12
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Why are you leaning towards the ECM?
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Old 03-14-2016, 10:46 AM   #13
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Only one injector is not firing my Noid light.... Continuity from green/black wire back to the ECM is fine..... In looking over the schematic the only other thing is the driver for #2 cylinder inside the ECM? Anything else I should check?
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Old 03-14-2016, 08:24 PM   #14
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Clear all codes.
Put the noid light back on and see if it fires. If not, find a PCM.
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Old 03-14-2016, 11:09 PM   #15
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Does anyone have a schematic for the ECM of this '03 Savanna 5.3?
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Old 03-15-2016, 12:18 AM   #16
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I think I finally found the ECM schematic I was looking for after quite some time lookig online..... The #2 Fuel Injector Wire was Lt. Green/Black, and looking at the ECM harnesses there was a Lt Green/Black in both the harnesses...... What I found was the Injector #2 was in the #1 (Blue) Harness, and the Light Green/Black in the #2 Harness (Red) was a VCC wire.
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Old 03-15-2016, 06:07 AM   #17
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If you were probing the wrong wires, then how did you get continuity?
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Old 03-15-2016, 11:32 AM   #18
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Good question, let me try to explain.... The volt meter I was using was malfunctioning, and I found it was giving me some erronous info...... When I grabbed another of my volt meters and checked it to make sure it was working correctly, then I found that I did not have continuity on the #2 wire...... now I just need to find were the break is..... I hate running down breaks in wires that is all wrapped up in coverings.
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Old 03-15-2016, 01:04 PM   #19
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All fixed....after I used a working volt meter I was able to run down a problem in the continuity of the #2 Injector wire..... Replaced the wiring, and it'* running fine....thanks for all the help.
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Old 03-15-2016, 06:11 PM   #20
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$20 multimeter almost cost you a $500 computer. Glad you got it fixed.
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