Discovery 2017

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  • IndusD4
    Member Since: 28 Jan 2018
    Location: Sydney
    Posts: 698
    Australia 

    Manual Tight Tolerance Mode

    On the D5 you can set the car into tight tolerance mode manually should anyone need this.

    The procedure is as follows:

    Gearbox in Park
    Start the engine
    Set the suspension to Normal height
    Open the drivers door
    Press the brake pedal lightly 3 times letting the pedal come up fully each time
    And close the door within 10 seconds from first press of the brake pedal.

    There will be 2 chimes from the instrument cluster after the door is closed, if successful. Each time the door is opened and closed 2 chimes will sound indicating it is still in tight tolerance mode.

    To deactivate:

    Either turn the engine off, or drive it over 5mp/h (8km/h)

    If you were to use this procedure for wheel alignment you need to have the engine running the whole time.


    Ron
    2016 D4 TDV6
    IIDTool BT
    22nd Dec 2018 10:51 pm
  • Russell
    Member Since: 26 Jun 2016
    Location: Lydd
    Posts: 1094
    United Kingdom 
    2017 Discovery Td6 First Edition Namib Orange

    👍
    How did you find that
    Namib Orange 1st Edition with black roof and wheels.
    Privacy, tow bar, drive pack, surround camera, heated front & rear seats, auto dim door mirrors, side steps, remote Pro, RSE, arm rest fridge dash cam front and rear.
    22nd Dec 2018 11:13 pm
  • IndusD4
    Member Since: 28 Jan 2018
    Location: Sydney
    Posts: 698
    Australia 

    I could boast about trail and error. But no, from the workshop manual.
    2016 D4 TDV6
    IIDTool BT
    22nd Dec 2018 11:25 pm
  • gavinadams
    Member Since: 25 Nov 2018
    Location: Sydney
    Posts: 103
    Australia 
    2019 Discovery Sd4 (240) HSE Loire Blue

    With this mode on, what does it actually change on the vehicle?
    23rd Dec 2018 2:16 am
  • IndusD4
    Member Since: 28 Jan 2018
    Location: Sydney
    Posts: 698
    Australia 

    Hi Gavin,

    Normally the air suspension doesn't self level until it has to adjust by a certain number of mm (I thought 10 but happily be corrected). This doesn't suit doing wheel alignments so in tight tolerance mode it adjusts quicker (not sure but may be 2 or 3 mm when it adjusts).

    Regards
    Ron
    2016 D4 TDV6
    IIDTool BT
    23rd Dec 2018 6:00 am
  • IndusD4
    Member Since: 28 Jan 2018
    Location: Sydney
    Posts: 698
    Australia 

    Seems I wasn't far off. This is from the IIDTool manual:

    This will set the EAS ECU into tight or normal tolerance mode. In normal tolerance mode, the EAS ECU
    will adjust a corner when it’s +/- 10 mm or higher than the desired height. For example if the corner is
    at +9 mm, it will not correct the height. If the corner is at +11 mm, the EAS ECU will make adjustments.
    In tight tolerance mode, a tolerance of +/- 3 mm is used.


    Ron
    2016 D4 TDV6
    IIDTool BT
    23rd Dec 2018 6:07 am
  • gavinadams
    Member Since: 25 Nov 2018
    Location: Sydney
    Posts: 103
    Australia 
    2019 Discovery Sd4 (240) HSE Loire Blue

    Thanks a good thing to know about especially if I get a wheel alignment done somewhere other than jlr service
    23rd Dec 2018 7:49 am
  • Alski
    Member Since: 05 Apr 2018
    Location: UK
    Posts: 11
    Northern Ireland 
    2017 Discovery Sd4 (240) HSE Silicon Silver

    Great Tip - Thanks
    27th Dec 2018 1:42 pm
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