ignition key immediately start

Energy One
M

m0535

New Member
I have a problem with a Mastiff 2007. When the ignition key is turned to ON, the starter immediately begins to crank.

I have checked the start button, and it is working. The two wires from the start button (black and green) are not shorted. The solenoid is functioning properly.

If I disconnect the wire from the control terminal on the solenoid and touch it to start, it works fine.

I am looking for the cause of the problem. Could the ECU be faulty? Lights, blue LED, indicators, etc., are all working.

Thanks for your support.
Dave.
 
S

Sven

Well-Known Member
Maybe the splined shaft is stuck to the flywheel? Remove the cover to install a starter button to the motor. That cover. See if the shaft is stuck forward. That's the physical (stuck) move minus E thrown at it.

To see if the magnetic field is produced, unhook the cable off the motor. Should arc with key off. No, that would mean phantom battery draw. OP makes no mention of the battery.

Say with key on, a fast tap and see if it sparks? This would show something is engaged between battery and motor.

ECU would code something in the loop is the guess. No codes triggered, not the ECU. But then again, if you had access to an ECU, plug it in and see if it starts normally, then yes.
 
Mickmorris

Mickmorris

Well Known Member
Supporting Member
m0535 said:
I have a problem with a Mastiff 2007. When the ignition key is turned to ON, the starter immediately begins to crank.

I have checked the start button, and it is working. The two wires from the start button (black and green) are not shorted. The solenoid is functioning properly.

If I disconnect the wire from the control terminal on the solenoid and touch it to start, it works fine.

I am looking for the cause of the problem. Could the ECU be faulty? Lights, blue LED, indicators, etc., are all working.

Thanks for your support.
Dave.
Click to expand...
Could be the ignition switch itself. It could be malfunctioning leading to unintended power delivery to the starter motor. Hope you figure it out
 
M

m0535

New Member
Hi everyone, I’ve made some progress. The control unit (EHC58) was defective. I got a new one fairly quickly from Axel Joost Elektronik—great service!


Now I’m facing a new issue: the bike won’t start. The handlebar buttons seem to work. I checked the wiring from the handlebar to the EHC58—continuity is good (0 ohms) on all six wires. Right indicator works, but the engine ON/OFF and RUN button don’t seem to function. The RUN button does nothing at all.


I still need to check the circuit board behind the START and ON/OFF buttons in case that’s the issue.


QUESTION:
What conditions must be met for the EHC58 to allow starting?


I don’t have a sidestand switch installed.
Do you have any tips on what else I can test or measure?


Thanks!
Dave

"... please write a bit more simply, I'm a non-native speaker and sometimes still have a bit of trouble."
 
HMAN

HMAN

I just like my Freedom
Supporting Member
Recheck all connections made with new EHC. Wires can be easy to miss. Double ck ground connection. Pull plug connector and check that all pins on EHC are straight. Starting procedure is to turn on key, depress the run button(speedo will sweep) then press the start button.
 
M

m0535

New Member
HMAN said:
Recheck all connections made with new EHC. Wires can be easy to miss. Double ck ground connection. Pull plug connector and check that all pins on EHC are straight. Starting procedure is to turn on key, depress the run button(speedo will sweep) then press the start button.
Click to expand...
okay, i've checked all Pins an Cable. All Cable look perfekt. I've disconnect all of them (1by1) prepare mit contact spray and reconnect again. The main pinout and the connector directly on the ehc58 are fine too.

But i'm not sure about PINout A19, thats the 12+ from the EHC to the ignition module 12+. There is no 12+ on the EHC side (female plug) ... and the ignition module, the little aluminium block with the three LEDs, dosn't seems to be getting 12+... so the LEDs are not lighting up.

Im not sure about the ditaild funktion of the EHC, i will contact Axel Joost again.

nice sunday, here its sunny today.

... by depress the run button, press start button : nothing happens, as if the button doesn't work.

Dave
 
M

m0535

New Member
Now the engine starts and runs. The following issues were the cause:
First, the control unit EHC58 was defective.
Second (just a suspicion, not yet confirmed), the Engine ON/OFF function doesn’t work.
I had to change the setting in the control unit (EHC) so that the engine starts immediately after turning the key to ON and the "Start" Button.
That works — the US setting with the additional Engine ON/OFF doesn’t work.
Luckily, it was just the EHC and nothing more.
Thanks for your help and ideas!
 
Ribert R

Ribert R

It’s still not alive. But close
Have a question what would drain my brand new deka battery. Everything is off, but went and checked it for voltage this a.m. and it was on 60% when yesterday I had it charging all day and have the night


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Mickmorris

Mickmorris

Well Known Member
Supporting Member
Ribert R said:
Have a question what would drain my brand new deka battery. Everything is off, but went and checked it for voltage this a.m. and it was on 60% when yesterday I had it charging all day and have the night


Sent from my iPhone using Tapatalk
Click to expand...
You obviously have a parasitic drain in your system. Most likely culprit is your alarm system. Other possibilities are a bare wire somewhere in the harness causing a short. Follow these tips to find where the drain is coming from. IMG_9739.png
 
Ribert R

Ribert R

It’s still not alive. But close
Ever j ew that was the way to find a drainer. That’s pretty cool I’ll try it and remember it


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Mikeinjersey

Mikeinjersey

Well-Known Member
m0535 said:
Hi everyone, I’ve made some progress. The control unit (EHC58) was defective. I got a new one fairly quickly from Axel Joost Elektronik—great service!


Now I’m facing a new issue: the bike won’t start. The handlebar buttons seem to work. I checked the wiring from the handlebar to the EHC58—continuity is good (0 ohms) on all six wires. Right indicator works, but the engine ON/OFF and RUN button don’t seem to function. The RUN button does nothing at all.


I still need to check the circuit board behind the START and ON/OFF buttons in case that’s the issue.


QUESTION:
What conditions must be met for the EHC58 to allow starting?


I don’t have a sidestand switch installed.
Do you have any tips on what else I can test or measure?


Thanks!
Dave

"... please write a bit more simply, I'm a non-native speaker and sometimes still have a bit of trouble."
Click to expand...
Page 8 of this manual will give you the recommended starting instructions.

Dropbox

www.dropbox.com www.dropbox.com
What actually happens is the ign key signals power-up to the EHC which then controls everything else. The next step is to hit the Run button which turns on the ignition module in order to provide spark when triggered by the crank sensor. Now you hit the Start button the starter will crank and the compression releases will work at the same time for 1 second in order to give the engine an easier time turning over.
Disconnect the green wire from the starter solenoid and put a meter on it. You should read approx 12vdc when the start button is depressed. You should also hear the compression releases fire at that time.
Use this video to troubleshoot your switches. Good Luck

 
Last edited:
Ribert R

Ribert R

It’s still not alive. But close
No but soon I’ll get it going still no fire and I’m going to find a way to, it’s going to fire up for me


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Ribert R

Ribert R

It’s still not alive. But close
How would I know if the crank sensor quit. And can I test it . S&S 117 EFI Mastiff


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Ribert R

Ribert R

It’s still not alive. But close
Hi, thank you for the help. It is much appreciated. I’m going home now from work. I’ll check it.


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