Member Since: 25 Mar 2019
Location: Lincoln
Posts: 67
If I unplug the clocks the readings go to kohms
22nd May 2020 8:59 pm
Dazz360
Member Since: 03 Sep 2016
Location: West Mids Walsall
Posts: 871
[quote="Briscoe05"]So earth strap looks ok.
You’d be surprised as mine looked ok but I had swmbo hold the key on turn over whilst I wiggled the wire then bingo it turned over
I took it off the chassis and body cleaned with a wire brush then a dab of copper slipMetal auto sump & fluid change (3 hrs)
LR door puddle projectors (10 mins)
Tinted Bonnet wind deflector (10 mins)
All Intercooler pipes and Tbolts (2hrs)
3 injectors replaced so far (30mins)
Sunroof drain pipes both sides 2.5 hrs)
Rear discs, shoes,pads,callipers,flexi hoses, rigid brake line, n/s upper hub carrier bush and rear n/s upper arm (13hrs over 2 days)
22nd May 2020 10:05 pm
Briscoe05
Member Since: 25 Mar 2019
Location: Lincoln
Posts: 67
Did you have full clock xmas tree? Temp gauge full with light on and lots of system faults on the display screen.
22nd May 2020 10:24 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Briscoe05 wrote:
So earth strap looks ok.
I did the ohms check and pin 3 and pin 11 = 60 ohms
Pin 6 and 14 is 120 ohms?
Hi
So for what I’ve been reading and what others have said , one of ur modules on the high speed canbus isn’t communicating correctly
On the pins between 6 - 4 u have the following modules
The high speed bus connects the following control modules:
* instrument panel display —— resistor fitted
* Steering angle sensor
* Air suspension module —- located on the drivers side , tucked up near the instrument panel RH side
* Electric park brake ——- near spare wheel
* Electronic rear differential control module
* Terrain Responseâ„¢
* Restraint control module —— hidden under the centre arm rest unit
* Engine control module
* Transmission control module ——- known to cause errors
* Adaptive front lighting system control module
* Antilock Braking System (ABS) control module ——— resistor fitted
The 120 ohms resisters are in the instrument panel and ABS module
Please try this
Pins 4 & 5 are grounds, check these are ok using ur multimeter , if after ensuring pin 16 gives u ur battery voltage , ie 12.6Vdc , go from
Pin 16-4
Then pins 16-5 , this will test ur grounds as u should read the battery 12.6 Vdc
Then with battery connected
Pin 16 is ur battery voltage , should be around 12.6vdc
With ur multimeter test
Pin 6 to ground , should have around 2.7 Vdc
Pin 14 to ground , should have around 2.3 Vdc
From what I’ve also read pin 6 and pin 14 should add up to 5 Vdc
If pins 6 or 14 are zero Volts means it’s grounded
If u get a low reading on pins 6 or 14 try removing ur instrument panel to access the wiring and wiggle the wires to see if the Vdc changes , if it does, try to start the disco
U can’t unplug ur modules one by one
The transfer control module behind ur battery is also another favourite to cause errors
Would the more knowledgeable members here please correct me if I’ve made a mistake as I would hate for the op to get wrong information
Hope this helps
Last edited by gstuart on 23rd May 2020 12:18 am. Edited 1 time in total
22nd May 2020 11:56 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Also wished to add I see the modules are connected either in a loop or spurred , so indeed please let us know how u get on and between all of us should be able to pin it down
23rd May 2020 12:10 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Hi
Just had a thought , yeh i know, lol
Please see which ecu’s that are in the list below that u can access via the live data menu in ur Autel please
Also assume u have the users manual, but put the link here just in case
* instrument panel display —— resistor fitted
* Steering angle sensor
* Air suspension module —- located on the drivers side , tucked up near the instrument panel RH side
* Electric park brake ——- near spare wheel
* Electronic rear differential control module
* Terrain Responseâ„¢
* Restraint control module —— hidden under the centre arm rest unit
* Engine control module
* Transmission control module ——- known to cause errors
* Adaptive front lighting system control module
* Antilock Braking System (ABS) control module ——— resistor fitted
Also got another idea but just trying to work it out in my head first , famous last words
23rd May 2020 6:52 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
So sat down over this for a good while
Before u do anything else , would u be so kind to first check, ur transfer control module and then the ECM that sits behind the battery plse
need to ensure the connectors and pins on the transfer control module and the ecm module are ok, the ECM sits behind the transfer control module Inside a plastic cover
the canbus wires are easy to identify as there’s 2 x wires twisted together
Also if I may add, plse ensure the cover goes back correctly to prevent any ingress of water
23rd May 2020 7:11 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Also found this , on the picture it’s the right hand side were interested in which is the canbus , marked B and indicated with the yellow dotted line
So u can see what is in the canbus loop so to speak, some are on a spur but don’t need to worry about those it’s the module that’s causing the break in the loop
Like a ring main of a house , hope that make sense
just wished to add this here as a bit of further Information
Will be interesting to see what u find on those 2 x ecus plse , ( transfer and ECM)
Following is the High canbus
Click image to enlarge
Click image to enlarge
Last edited by gstuart on 23rd May 2020 10:08 am. Edited 1 time in total
23rd May 2020 7:52 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782
GS, I think there are two Can busses (high and low), which is this one and do you have details of the other one
23rd May 2020 8:11 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Hi globetrotter
Indeed there are 2 x can buses , Ref the canbus , OP has 120 ohms error between pins 6-14 so that will be his high , the other one between pins 3-11 will be the medium one
PIN 3 and 11 medium
PIN 6 and PIN 14 High
This is what both canbus systems cover
The medium speed bus connects the following control modules:
* Integrated Head Unit (IHU) or low line head unit
* Heating and ventilation control module
* Fuel burning heater
* Park distance control
* Tyre pressure monitoring control module
* Central junction box
The high speed bus connects the following control modules:
* Steering angle sensor
* Air suspension
* Electric park brake
* Electronic rear differential control module
* Terrain Response
* Restraint control module
* Engine control module
* Transmission control module
* Adaptive front lighting system control module
* Antilock Braking System (ABS) control module
Did u also want me to find the pictures like above but for the medium canbus
Hope that helps
Last edited by gstuart on 23rd May 2020 10:07 am. Edited 1 time in total
23rd May 2020 10:00 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Am also going to get an oscilloscope ( Hantek 1008c ) later this year and a break out box , will then spend a good amount of time getting baseline figures
Then thought of posting all the data here into one post so hopefully will be useful / interesting
Yes I know , I’ve been shut away to long, but really enjoy doing things like that
23rd May 2020 10:05 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Also found this if it may help in any way
Click image to enlarge
Click image to enlarge
23rd May 2020 10:56 am
Dazz360
Member Since: 03 Sep 2016
Location: West Mids Walsall
Posts: 871
GS what system are you using for all the info and exploded views as I’m in after a comprehensive one ? Like yoursMetal auto sump & fluid change (3 hrs)
LR door puddle projectors (10 mins)
Tinted Bonnet wind deflector (10 mins)
All Intercooler pipes and Tbolts (2hrs)
3 injectors replaced so far (30mins)
Sunroof drain pipes both sides 2.5 hrs)
Rear discs, shoes,pads,callipers,flexi hoses, rigid brake line, n/s upper hub carrier bush and rear n/s upper arm (13hrs over 2 days)
23rd May 2020 3:22 pm
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782
GS, thanks for that info as it will come in handy at some time. I am a hoarder for information related to LR3. Am I correct in thinking that the resistors are only at the start and finish of each buss. So the 120 ohms measured means the fault has put the resistors in series.
24th May 2020 12:33 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Dazz360 wrote:
GS what system are you using for all the info and exploded views as I’m in after a comprehensive one ? Like yours
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