Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
In-Vehicle Network - High Speed CAN communication faults
Measuring resistance between pins 6 & 14 on the DLC, CAN High and CAN Low. The CAN bus is terminated at either end with 120 Ohm resistors in parallel, the expected reading would be 60 Ohms.
Click image to enlarge
Channel 1 connected to CAN High and set to a 5V scale with 500 μs timebase and no trigger. Channel 2 connected to CAN Low with a 5V scale. CAN recessive state is 2.5V. The high & low signals will mirror each other with dominant values of 3.5V and 1.5V
Click image to enlarge
Click image to enlarge
Click image to enlarge
Now to identify which module is affecting the loop.GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
30th Jul 2016 9:23 pm
andyhibs
Member Since: 06 May 2021
Location: Luton
Posts: 1
Hi
Is there a way I can contact you regarding diagnostics of a L494 in Northampton?
6th May 2021 11:13 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1771
This may help as I made it up whilst fault finding
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