Author Topic: no spark, no fault codes - recommendations to check first?  (Read 10908 times)

Offline J.K.

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no spark, no fault codes - recommendations to check first?
« on: August 04, 2016, 12:38:59 PM »
Ok,
so the bike had fresh battery, oil and fuel.
Fuel pump spins up fine, everything working  but no thing to the plugs ... no spark.
Connected up to diagnostic through OBD port and bike shows no fault codes.
Its going to be another couple of days before I get another chance to mess about with it so ..
Anyone any suggestions on first things to check before getting really involved and stripping the tank back off?

where is the "tilt switch" situated is it easy to get to? # edit - my bad, just found the wiring schematic and the parts diagrams.... DOH !
« Last Edit: August 04, 2016, 01:27:01 PM by J.K. »

Offline wytfut

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Re: no spark, no fault codes - recommendations to check first?
« Reply #1 on: August 04, 2016, 10:03:08 PM »
Tilt switch isn't easy.... its under rear fender with the ECU. ...
you can get there without pulling rear tire, but its a lot easier if you pull it... saves lots of aggravation. ...

The tilt switches are getting old and i'm sure have gotten wet...   it stands to reason...

another point of interest would be engine speed sensor, its located on the bottom of the engine up front. that allen head is a tuffy to get out, but if you take off the motor mounts makes a little easier access...

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Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #2 on: August 05, 2016, 05:53:30 AM »
had  half an hour this morning before I go out ..the cover is off and have the tilt switch out - no obvious corrosion anywhere...everything on this bike is a pain in the ass so far, someone has rounded off a lot of the allen head bolts inside. ( was the rear oil drain plug originally a 9mm allen key - mine is mashed and hacked .... the one on the other bike is even worse... totally rounded off and currently refusing to budge!)

Would I get away with just draining the oil from the front drain plug or will it not all drain ?

will try bypassing it if I get time over the weekend, havent looked at the wiring diagram but am guessing just connect the red to the orange to bypass the tilt switch?
« Last Edit: August 05, 2016, 06:05:38 AM by J.K. »

Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #3 on: August 05, 2016, 01:05:35 PM »
got back early today and did a few tests around the tilt switch and it seems fine.
Starting to move towards a bad crank sensor which would sort of fit in with this bike having an intermittent cut out problem before it was laid up. I suppose the crank sensor may have been starting to fail as it was a cut out when warmed up that was reported and maybe now it has given up completely...........

Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #4 on: August 05, 2016, 03:34:39 PM »
another point of interest would be engine speed sensor, its located on the bottom of the engine up front. that allen head is a tuffy to get out, but if you take off the motor mounts makes a little easier access...

Bruce

isnt that the crank position sensor up front?
looks like a REAL pig to get out... and my next port of call!

anyone know of a compatible crank postion sensor and best place to pick one up?
The interchange list gives a Triumph part number which hhave been ideal for me in the UK , but I just looked at it and it looks completely different to the sensor on the bike.........
« Last Edit: August 05, 2016, 03:57:49 PM by J.K. »

Offline wytfut

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Re: no spark, no fault codes - recommendations to check first?
« Reply #5 on: August 05, 2016, 05:07:50 PM »
yes.....
crank sensor....  I get so confused....
on this site is a copy of the factory shop manual....   I believe it shows how to test that crank sensor...

I haven't seen the triumph crank sensor in person.... but I'd believe that it should look pretty similar, as both bikes use the same era Sagem electronics....   
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Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #6 on: August 05, 2016, 06:15:14 PM »
ohh... and you werent wrong - the cover on the ECU and tilt switch was a real PITA to get off without removing the rear wheel.
I havent even thought about trying to get it back on yet!

Offline wytfut

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Re: no spark, no fault codes - recommendations to check first?
« Reply #7 on: August 06, 2016, 06:42:28 AM »
Yeah it tempting to leave on every time you have to go there, but it's a holiday lot less aggravation to take it off
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Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #8 on: August 06, 2016, 09:45:52 AM »
yes.....
crank sensor....  I get so confused....
on this site is a copy of the factory shop manual....   I believe it shows how to test that crank sensor...

I haven't seen the triumph crank sensor in person.... but I'd believe that it should look pretty similar, as both bikes use the same era Sagem electronics....


this is it here -

Offline wytfut

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Re: no spark, no fault codes - recommendations to check first?
« Reply #9 on: August 06, 2016, 04:53:55 PM »
I also found out today that the cross reference list on this site is not correct from Jamie Jones.
I'm going to try and get it up dated. I apologize for any inconvenience ...
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Offline Donkey Hotey

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Re: no spark, no fault codes - recommendations to check first?
« Reply #10 on: August 08, 2016, 02:22:12 AM »
Unfortunately, the crank sensor can be faulty and still not show a problem when hooked to a computer nor set any codes.

First giveaway: crank the engine and look at the tachometer. Does the tachometer needle move as you're cranking? If it stays at zero, you've either got a bad sensor or broken wire going to the sensor. I'd bet on a bad sensor.

After that, I'd pull the coils one at a time, put a spark plug into the coil and ground it. Repeat the cranking test and look for spark. Could be bad coils but, unlikely that both would fail at the same time.

And for you guys talking about what a bear it is to remove: if it's hard to remove, it's because the front engine mounts are probably bad. With fresh rubber mounts, the screws should both be accessible and the sensor should easily slide out. The cross member only gets in the way if those mounts are bad.

You can guess how I learned this;D
Greg

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Offline moodier

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Re: no spark, no fault codes - recommendations to check first?
« Reply #11 on: August 09, 2016, 11:29:09 AM »
Regard that crank sensor!I tried as mentioned on here ign on cranked it no tach movement!That would sound like might be bad.Bike has 8K miles and is number 31 so very early one believe it was used for testing mostly and at factory to the closing!Suppositly it was updated to that point but I have done nothing since!Any thoughts afraid I am not much of a mech when it comes to all this modern electronics!I thought there was a fellow back near the old factory that worked on these and had parts?Maybe best if I can find him probably a 100 mile drive but still may be better than me fiddling with it!Any help much appreciated!

Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #12 on: August 09, 2016, 11:39:00 AM »
well, its an interesting one and not something I had previously noticed so I tried it on both bikes that I have here.
The tacho doesnt show ANY movement on either bike whilst cranking them over on the starter - yet the other bike has no running or starting issues...so obviously doesnt have a crank sensor issue.

( although it does seem to have a slight problem with the starter not engaging correctly everytime!!)

Offline wytfut

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Re: no spark, no fault codes - recommendations to check first?
« Reply #13 on: August 09, 2016, 09:05:15 PM »
JK.....
I found it bothersome that you were using cross reference parts lists off of this web site and they led you astray... so I'm trying to get them updated and corrected.
I found that the crank position sensor (as you did) is incorrect. The ECM is incorrect. And I can't tell on the engine temp sensor, as the picture on triumphestore.com is way too small. Other than those 3 everything else appears to be correct for face value.
I apologize that these were not correct, as I have never used this specific list. I've been using a cross referencel list from way back in the day yahoo site "Dealer 38"....   
Just for your information.... I found some other numbers for that crank sensor, that maybe you can make work? From my little bitty desk here, they don't come up on anything.
Sagem part # 01VR004   and I believe this one is a triumph part VRSensor.... I know vague at the best.


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Offline J.K.

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Re: no spark, no fault codes - recommendations to check first?
« Reply #14 on: August 09, 2016, 11:57:02 PM »
Hi,
 appreciate your help , thanks.
Cant find anything on the web for that part number so far thought