Suzuki df 140 no start

[loudbydesign]

Hello all

Currently I’m dealing with an issue that just recently popped up on our andros equipped with a 2007 df140. When I turn the key I get my normal buzzer tone, tach jumps to show the hours on motor, fuel pump prims, etc but the starter doesn’t even try to turn over. This boat has a folding tower on it which utilizes a zf marine micro commander to take the electronic signal from the throttle in the tower, to a box which controls the mechanical shift and throttle cables which run from the center console to the motor itself. This also includes the neutral safety which would normally be a small continuity switch on the back side of the throttle. So far I’ve tried rerunning the main hot and ground wires from the motor to the batteries, checked continuity from the neutral safety at the helm and shift position sensor to the starting circuit, swapping the relays for the starter and checking all of the fuses but no matter what I do I cannot get the ecu to energize the small red wire which runs to the back of the starter solenoid.

Are there any other possibly issues that could cause a no start condition like this besides the key switch itself?

 

[William01]

https://www.thehulltruth.com/boating-forum/1022455-suzuki-white-wire-what-real-answer-2.html
See post #22

https://www.thehulltruth.com/boating-forum/852383-suzuki-white-wire-power-failure-issues-2.html
See post #1

To my understanding the white wire feeds the ignition switch, from there when the ignition switch feeds a grey wire that provides 12V to the ECM. You should have 12V to the ignition switch always, turn the key to on and you should then have 12V at the ECM via the grey wire.

 

[loudbydesign]

https://www.thehulltruth.com/boating-forum/1022455-suzuki-white-wire-what-real-answer-2.html
See post #22

https://www.thehulltruth.com/boating-forum/852383-suzuki-white-wire-power-failure-issues-2.html
See post #1

To my understanding the white wire feeds the ignition switch, from there when the ignition switch feeds a grey wire that provides 12V to the ECM. You should have 12V to the ignition switch always, turn the key to on and you should then have 12V at the ECM via the grey wire.

I’ve chased the white wire all the way back to the motor and up to the console and have power everywhere. Unfortunately I’ve had a white wire issue on this boat and nothing worked including the tach and trim and tilt but that was corrected years ago. Now with power to the white wire my trim and tilt works and fuel pump comes on but for some reason I’m still not seeing any power to the wire that connects to the starter solenoid. I just replaced the key switch as well thinking that was it and still nothing

 

[William01]

Do you have 12 volts on the grey wire that feeds back into the ECM? Have you verified that the emergency stop switch is functioning? I would suggest you get a genuine Suzuki service manual, I suspect your going to have to get into troubleshooting deeper than my limited electrical knowledge. I will post a screenshot of the starting wiring for my 2009 DF90A, not your engine but it should be close enough to give you an idea for troubleshooting.

 

[William01]

https://www.selffixer.com/outboard.motors/suzuki/DF90.100.DF115.DF140.2001-2009.htm

This is where I got my service manual, no funky charges showed up on my credit card other than the cost for the pdf manual.