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Old August 19th, 2017, 01:38 AM   #50
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

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MOTY - 2018, MOTM - Nov '17
Confirm your black-wire repair. Test that by measuring resistance between black-wire spade connector to chassis ground. Compare that to your earlier reading and what do you get?

Quote:
Originally Posted by gitter View Post
Got the wiring harness back in. Still no signal on black wire. At this point is it safe to say that the ecu is fried?
Quote:
Originally Posted by gitter View Post
is there any way to test the ecu without finding another one to try out?
Yep, no output on ECU-ignitor black wire to left coil pretty much confirms it's dead. Now WHY it's dead can be a mystery that's endlessly debatable. But there's no arguing that it's dead on left side. I think the short on black wire wiped out the driver-transistor.

Do one more test to confirm the left channel's dead.

- disconnect black wire spade from coil
- bridge green-wire from right coil to left coil empty terminal with test-leads/alligator clips
- perform 'noid light test on green coil, does it flash?
- perform 'noir light test on black coil, does it flash?
- how does bike run?

Last futzed with by DannoXYZ; August 20th, 2017 at 12:44 PM.
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