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Last Edit: June 19, 2016, 22:58:20 PM by gary
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Topic summary

Posted by Troll
 - June 19, 2016, 20:05:37 PM

Good luck...

Posted by gary
 - June 19, 2016, 15:02:08 PM

That sounds like a go. Looking at the pin chart now. I've learned a lot since yesterday. Now to go forward from here with hopes that I haven't shorted out every module on the bike. Thanks for the tip. I will be trying that.

Posted by Troll
 - June 19, 2016, 07:32:49 AM

Common problem #1...Ignition switch. Happened to me, and several others I know of...There is a circuit in the EFI ign. switch that goes to the "unused" pin on the ECU that sends a low voltage signal to let the ecu know that the switch wasn't bypassed. Without it, the fuel pump won't turn on. Test...simple enough. run a wire to ground from the GROUND SIDE of the fuel pump electrical connector. Pump will run, bike will start. The ecu completes the ground circuit for the pump, if it sees the signal on pin 5..if it doesn't , it won't.

Posted by gary
 - June 18, 2016, 23:24:17 PM

Fuel pump not pumping. Had FI light on until I taped the top of the DFI relay. Still no fuel pump. All fuses are good and good connections all around. Everything ohms good from the ignition switch. Bench test on the fuel pump and it works properly. Down switch module is in position. Good battery. ECU module does not respond to the ECU code check (no FI light at all). Ordered a new DFI relay, cheap enough since it responded to the tap. I think my ECU is dead. I've had a wont start problem for years but the problem is so intermittent it couldn't be diagnosed at a shop. Did the if it ain't broke don't fix it thing till it stayed broke.

Posted by Troll
 - June 18, 2016, 18:23:28 PM

Probably not...what's the issue?

Posted by gary
 - June 18, 2016, 14:21:39 PM

Is there a way to bench test a 99 drifter ECU module?

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