Engine cuts out - Error code P1698 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 17 (permalink) Old 04-18-2010, 08:31 PM Thread Starter
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Engine cuts out - Error code P1698

Hi,

I have a 2009 T100 Bonneville. Tried to carry a passenger tonight and the engine would cut out. Error code was P1698 - Sensor supply Vcc Malfunction. Bike seems to run ok without passenger. Any ideas?
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post #2 of 17 (permalink) Old 04-19-2010, 12:09 AM
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Is it the extra weight on the seat causing a sensor malfunction?

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post #3 of 17 (permalink) Old 04-19-2010, 03:52 AM
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P1698 is a code for "Voltage control circuit malfunction". Sounds like a problem with the rectifier/regulator. If you have a multimeter measure the voltage at the battery with the engine running at a fast idle. Should be over 13 volts but no more than 14.8 or so.

I can't see what difference having a passenger makes, but can could happen is that the ECM supply relay could be slipping out of its socket. This is the small (1"x1") black box under the seat, between the barometric sensor and the tip-over cut-out switch. Its mounted on a floppy rubber mounting and might have slipped off it.

Last edited by Forchetto; 04-19-2010 at 07:53 AM.
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post #4 of 17 (permalink) Old 04-19-2010, 10:13 PM Thread Starter
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Found problem. Pinched wire under seat was rubbing against frame. Bit of tape and she's all set to go. Thanks all for the tips.
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post #5 of 17 (permalink) Old 08-30-2016, 02:56 PM
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Hi JC,

I got the same problem with my Bonneville P1698, by reading your post I realized that anytime I got the problem my girlfriend was on the bike.

Could you tell me how did you identify the pinched wire I checked and I could not find anything, so I have taped everything but the light is still on.

Thanks in advance

Luca
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post #6 of 17 (permalink) Old 05-16-2019, 09:29 AM
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Quote:
Originally Posted by Misterpinty View Post
Hi JC,

I got the same problem with my Bonneville P1698, by reading your post I realized that anytime I got the problem my girlfriend was on the bike.

Could you tell me how did you identify the pinched wire I checked and I could not find anything, so I have taped everything but the light is still on.

Thanks in advance

Luca
I have the same problem , but everything was fine until one time while I was riding I swich on and off lights ( short and long distance light ) and bike turned off, then I could not turn it ON again, later I connected it to OBDII cable and see this alarm ( 1698 ) , rectifier is showing good resistance, crankshaft position sensor is also good ( resistance 615 Ohms at 20C ), but only thing that is confusing me is that while the bike is running , battery is showing 12.5 V, when I add throttle and leave it on 3500- 4000 rpm it still stays at 12.6 Volts, not going up or down
Anyways, if you have any ideas what else to check for this stupid alarm, thank you ... ( maybe it has something to do with this swiching headlight long and short beam ,like giving a signal to another bike or a car, I don't know what is a word for this one, sry )
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post #7 of 17 (permalink) Old 05-16-2019, 08:26 PM
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Charging system.
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post #8 of 17 (permalink) Old 05-17-2019, 01:12 AM
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Charging system.
But rectifier/refulator is showing ok when I test it , its shoing 0.610 on miltimeter on all 3 pins, ok I will try it one more time to see if the battery voltage will go up to 14.5 when I rev it 😕
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post #9 of 17 (permalink) Old 05-17-2019, 01:26 AM
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But rectifier/refulator is showing ok when I test it , its shoing 0.610 on miltimeter on all 3 pins, ok I will try it one more time to see if the battery voltage will go up to 14.5 when I rev it 😕
So if the voltage out of regulator is low, have a check for what output the stator is giving, these are the 3 wires supplying the regulator, be careful though as these are a.c., I think at idle they should be around 25,30volts a.c. and as you rev should steadily increase can't remember what they go up to off top of my head but I'm thinking 70vac this should be even across each pair that you measure, there is a thread on here some where that goes through step by step for stator and regulator checks
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post #10 of 17 (permalink) Old 05-17-2019, 07:20 AM
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Quote:
Originally Posted by Ade-955i View Post
there is a thread on here some where that goes through step by step for stator and regulator checks

I think you must mean this definitive one by @DEcosse :


https://www.triumphrat.net/speed-tri...r-upgrade.html
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