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I'm troubleshooting a no spark on my new motor. Have it narrowed down to a missing reference (Cir 2129 and 2130) and missing ground to the coil packs. Anyone have a schematic with these 2 circuits.
Car is a 2005 with E40 ECU.
You don't mention the Engine type. LS2, LS3, LS7 or LS9.
They may be all the same as far as coils go, but I only have a color coded schematic of the LS2 and LS7 that shows the main ground(G107)at right rear of the engine, with all the coils connected together from the ground (BLK) wires.
on the LS7, the low reference from each coil (BRN) wires (38 and 39) reference 2129 and 2130 connect to pins 78 & 79 of the the ECM (behind passenger fender) as per the attached pics.
The LS2 (6.0) schematic shows the low reference from each coil (BRN) wires as (39 and 40) on the schematic, reference 2129 and 2130 connect to pins 78 & 79 of the (behind passenger fender).
Both the LS2 and LS7 use the same color wiring from the coils (BRN) and the same reference #'s, and use the same pins on the ECM
I can certainly offer you a PDF of the entire C6 circuits if you PM me your e-mail address.
These particular circuits are on page 23 & 24 for the LS2, and on page 27 & 28 for the LS7.
Thanks for the input. Looks like the E40, 2005 LS2 has the low reference on C2 pins 16 and 64.
Got that straight but I have another error.
Going to post the question for the error in another thread.
looking for a ecu/coil pack schematic
