Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Gear position sensor  (Read 4138 times)

0 Members and 1 Guest are viewing this topic.

  • Offline nigelrtaylor

    • Ex Member
    • Trophy Member  ‐    56
    • *
    • Topic Author

    Offline nigelrtaylor

    • Ex Member
    • Trophy Member
    • *
    • Topic Author
    • Posts: 56
    Gear position sensor
    on: May 29, 2017, 05.29 pm
    May 29, 2017, 05.29 pm
    Just finished an 800 mile weekend around Yorkshire. Just after settng of from home I filled the bike, which was nearly empty. Leaving the fuel station I noticed the green neutral light was on regardless of actual gear selected. Also the fuel gauge didn't recognise the recently filled tank. Instead showing no bars and 0 mile range. The bike was running fine so I carried on with my trip. The fuel gauge was playing up all weekend. Sometimes registering that I had filled the tank and sometimes continuing to count down from a half full state even though I had refilled the tank. On the way home today the gear indicator sprang back into life show the correct gear selected. Intermittently though whilst riding the green neutral light would flash and the engine would cough.
    Another symptom of the neutral light being on permanently was the engine would cut out when coming to a stop at junctions as I moved from 2nd to 1st. A more serious symptom was being able to ride away with the side stand down!
    Anyone got any ideas? It's going to the dealer later this week for investigation.

  • Offline Coconut   gb

    • Trophy God  ‐    9941
    • *****
      #1

    Offline Coconut

    • Trophy God
    • *****
    • Posts: 9941
    • Bike: 2017 Trophy SE
    • City / Town: South Birmingham
    • Country: gb
    Re: Gear position sensor
    Reply #1 on: May 29, 2017, 07.04 pm
    May 29, 2017, 07.04 pm
    It would certainly seem like the Gear Position Sensor is faulty,
    and I'm fairly confident that this will be linked to the other issues.

    The safety interlocks prevent the engine from running when a gear is selected
    and the side stand is down, so if the Gear Position is incorrectly showing Neutral
    when a Gear is selected, that would explain why the engine does NOT cut out
    with the Side Stand still down.

    I'm not sure why this would cause the engine to cut out with side stand up though  :084:

    With regards to the Fuel Gauge, after filling up, the Owners Handbook states :

    After refuelling, the fuel gauge and range to empty information
    will be updated only while riding the motorcycle.
    Depending on the riding style, updating could take up to five minutes.

    As the erratic fuel gauge behaviour began at the same time
    as the assumed Gear Position Sensor fault, it is likely that the two faults are related,
    possibly due to shared wiring connections, but I don't have access
    to the Wiring Diagram right now to confirm.

    WHENEVER there is any apparent fault, I always recommend that a check is made
    to see if any "DTC's" ( Diagnostic Trouble Codes ) have been stored,  that can help
    to diagnose faults.  It is easy to have any DTC's displayed on the Instrument Panel
    by referring to the instructions in this Topic :
    Servicing Data, Reference Info. & DTC ( Fault ) Codes - Reply #8,
    where there is also a Word Document that can be downloaded,
    listing all the Codes, with a description of their meanings.

    With intermittent faults it is especially important to check for DTC's as they can be erased
    from the ECU Memory after a certain number of "No Fault" starts, leaving you
    with no record of what went wrong to bring to the attention of your Dealer.

    Take a Photograph of any DTC's displayed - as "evidence"  :169:

    Cheers  :821:


    Last Edit: Mar 06, 2020, 07.48 pm by Coconut

  • Offline nigelrtaylor

    • Ex Member
    • Trophy Member  ‐    56
    • *
    • Topic Author
    • #2

    Offline nigelrtaylor

    • Ex Member
    • Trophy Member
    • *
    • Topic Author
    • Posts: 56
    Re: Gear position sensor
    Reply #2 on: May 29, 2017, 07.28 pm
    May 29, 2017, 07.28 pm
    Thanks coconut. DTC says P0000

  • Offline nigelrtaylor

    • Ex Member
    • Trophy Member  ‐    56
    • *
    • Topic Author
    • #3

    Offline nigelrtaylor

    • Ex Member
    • Trophy Member
    • *
    • Topic Author
    • Posts: 56
    Re: Gear position sensor
    Reply #3 on: May 29, 2017, 07.30 pm
    May 29, 2017, 07.30 pm
    Sorry, should have said i checked DTC several times during the weekend and always P0000

  • Offline Mikestrophy

    • Trophy Member  ‐    87
    • **
      #4

    Offline Mikestrophy

    • Trophy Member
    • **
    • Posts: 87
    • Bike: Trophy SE
    • City / Town: Melbourne
    Re: Gear position sensor
    Reply #4 on: Nov 14, 2018, 06.50 am
    Nov 14, 2018, 06.50 am
    Today I was riding and the check engine light came on with the traction control light. I stopped, switched off the ignition, gave it a minute, started it again and only the check engine light came on and has stayed on. I have fault code P705 ie ďGear position sensorĒ.  BTW first problem I have had in 40000 kms. Is it a simple ie CHEAP fix ? Thanks for any advice.

  • Offline nigelrtaylor

    • Ex Member
    • Trophy Member  ‐    56
    • *
    • Topic Author
    • #5

    Offline nigelrtaylor

    • Ex Member
    • Trophy Member
    • *
    • Topic Author
    • Posts: 56
    Re: Gear position sensor
    Reply #5 on: Nov 14, 2018, 09.21 am
    Nov 14, 2018, 09.21 am
    Easy fix. Is your neutral light on too?

  • Offline Coconut   gb

    • Trophy God  ‐    9941
    • *****
      #6

    Offline Coconut

    • Trophy God
    • *****
    • Posts: 9941
    • Bike: 2017 Trophy SE
    • City / Town: South Birmingham
    • Country: gb
    Re: Gear position sensor
    Reply #6 on: Nov 14, 2018, 09.28 am
    Nov 14, 2018, 09.28 am
    Hi Mikestrophy,

    Sorry to hear of this - a few Members have had problems with the Gear Position Sensor,
    but fortunately it is relatively easy to change it.

    The Service Manual describes a number of electrical tests when this Fault Code is thrown up,
    so before committing to buying a new part, check the integrity of the wires at the sensor end,
    at the Multi Plug end of it's cable and continuity along their length.

    The Gear Position Sensor is located on the left side of the bike, just forward of the Gear change
    pedal Gearbox input shaft.  To access it you need to remove the left Side Control Plate.

    NOTE : Before commencing work - the Service Manual calls for all three Torx headed bolts,
    and the 14mm Nut described below, to be replaced with new ones !
    ( Some Members have re-used them without any problems ! )

    Remove the left side Fairing. See here : HOW TO: Remove the Fairing .......

    The Side Control Plate is secured by Five fixings :

    One is underneath the "Heel Guard" - behind the footrest, secured by two ( 5mm ) Allen Head screws.

    Removing the Heel Guard will reveal a 14mm Bolt Head fixing with a nut on the "other" side.
    ( This is the lower rear subframe nut and bolt, and is the first one to remove ).

    In front of the Footrest is an 8mm Allen Head Bolt for the Side Stand,
    and is the second fixing to be removed.

    There are then Three Torx head bolts ( T40 ) which are TIGHT.
    They have blue "Loctite" type material applied to their threads.
    These should be removed last.

    Once the Side Control Plate is removed you can access the Gear Position Sensor :



    Check the integrity of the wiring, as mentioned above, tracing it's harness back to the Multi Plug connector.

    A new Gear Position Sensor is Part Number T1290660, and will cost around £65.00.

    Available from any authorised Triumph Dealer, or here : World of Triumph ( Item 14 )

    Cheers  :821:



    Last Edit: Feb 05, 2020, 12.45 pm by Coconut

  • Offline Mikestrophy

    • Trophy Member  ‐    87
    • **
      #7

    Offline Mikestrophy

    • Trophy Member
    • **
    • Posts: 87
    • Bike: Trophy SE
    • City / Town: Melbourne
    Re: Gear position sensor
    Reply #7 on: Nov 14, 2018, 10.19 am
    Nov 14, 2018, 10.19 am
    Thanks Nigel and Coconut for the quick reply. The Neutral light is not on. Only the check engine light. Iím wondering if it is an intermittent fault and the check engine light will disappear after a few no fault starts ??? Thanks Coconut for the tech help. But Iíll leave the mechanical work to the experts. A very thorough explanation on how to do it though. I suppose the other question I have is, does a faulty gear position sensor affect the way the bike rides ie I assume it will still go, stop, change gears, and give me just as much enjoyment as it has for 40000 kms ? Can the replacement wait till Iím back in Melbourne in 3 weeks ?