Posted: Wed Nov 20, 2013 10:31 pm Post subject: '01 9C1 no crank
Just picked up a 2001 Impala (9C1) that was DOA after a fuel line leak and subsequent fire atop the intake. Fortunately there was little damage; only the the fuel lines, fuel rail, spark plug wires, and a few other odds and ends were harmed.
The car had sat for better than a year in this state, so I also had to remove and charge the battery. It took a charge fine and passed a quick load test.
Having fixed all that, I made my first attempt to crank it. I received one key with the car, an obvious replacement (no rubber head).
Put the key in, turn to Run; fuel pump runs (yay, no leaks, holds pressure!) and DIC alternates between Battery and Security. Turn to Start, all lights go black except for the MIL - does not attempt to crank. Return to Run, DIC shows Battery only (no more Security). I can do this as many times as I want with the same result.
Tried the 10-minute Passkey relearn, no dice. Tried the 30-minute Passkey relearn, no luck there either.
Hooked up the scantool. PCM hadn't set any codes, but the BCM sure had (total of 9 history codes). There were several regarding the door locks and DRLs, as well as a couple that seemed more relevant:
B2964 - Key-In Ignition Circuit High
U1016 - Loss of communication with PCM
From reading various things, it seems the two most likely culprits would be failure of the BCM and/or associated wiring, or that the car is in need of the famous Passkey resistor bypass. (I'm leaning towards the latter, but since this car isn't behaving quite the same as described elsewhere I'm not positive.)
Before I begin extracting the ignition switch, would anyone else be willing to weigh in on this?
Is the security light flashing several times before it switches to the battery light, or is it alternating steady between security and battery? Have you checked the crank relay and checked to see if the starter is getting power? If it is, you might just have a bad starter.
_________________ 2001 Galaxy Silver 9C1 w/ L67 and 4T65E-HD...and a few other mods.
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