AussieKingQuad

View File 2007-2010 Suzuki King Quad 450 AXI Service Manual 2007-2010 Suzuki King Quad 450 AXI Service Manual Submitter AussieKingQuad Submitted 11/23/2023 Category Suzuki ATV  

the earth wire on the coil had lost its insulation (due to melting) going back 30cm from earth terminal ring, I suspect this is from the voltage regulator putting out too higher voltage. I miss understood what my mechanic told me. Ignition Coil peak volt test is 0.06V - not below 80v as I miss understood but the primary (0.5ohm) and secondary (15.35kiloohm) ignition coil windings resistance are both in range.

I've got what looks like exactly the same problem. king quad 450, 2008 model it was overcharging 17-20V so I changed the voltage rectifier and fixed the overcharging, it ran fine for months. on a later scheduled service I noticed the earth wire on the coil had lost its insulation going back 30cm from earth terminal ring, so un-taped a section of the loom and replaced the coil earth wire. but now I have code c12, ( no spark ,no injection pulse) my mechanics diagnostic tool gave 3 codes -Engine coolant/oil temperature malfunction , -Crankshaft position sensor A circuit, -Ignition coil A circuit malfunction. CPK gives 4.7V and sensor resistance white -blue =217 ohm ( in range) white to ground =open ( correct) Ignition Coil peaks just below the recommended 80V (but I'm thinking at starter motor crank speed it wont be as a high as specified) primary and secondary ignition coil windings resistance are both in range. untaped entire loom , visually inspected every wire, all looks good. I have done continuity tests on all relevant wires after hearing of DaDolt's success, i pulled the strain relief out of the ecm connector and while cranking I twisted the ecm in all directions BUT didn't get it to fire. I don't have spare king quad like DaDolt but thinking of buying one, I'm scared if I do buy spare king quad and swapped out the ecm's I could blow the donor ecm if I have a fault like an earthed wire?