Thread: Discovery 2 Crank no start, only 6c permanent voltage supply dtc

Simple things first. Have you checked the crash switch? Inertia switch on the firewall, might need resetting.

Hello and thank you for the prompt reply and yes i have pressed it multiple times lol.

Originally Posted by jassoyer

Hello, hoping someone can assist me in the right direction please, mechanic also lost the original crank sensor, does it use a spacer on the manual v8 4.0?

ALso on the crank sensor wiring I have a ground and both other wires supply 2.4 vault, should the one not supply 12v 0r 5 and the other a signal wire?

Thank you in advance.

Hi there is not supposed to be any supply for the crank sensor, that 2.4V might be capacitive if it's not an ECU fault, i attach you the description rather than explaining myself but you need a compatible scantool to diagnose this and watch rpm which must be above 250 while cranking for te engine to start and if it was the sensor a specific fault code should be present

Thank you very much, that is the part confusing me.... only have a single fault code -6c permanent volage.... drive cycle A. REason I am investigating the crank sensor and voltages/signal to each wire on the cps is to establish if the cps is working as I see no rpm on tacho or Autel elite or Launch x431 V+.

Originally Posted by jassoyer

only have a single fault code -6c permanent volage.....

Which P code is associated to that?

Will get oem tool to test and confirm as I can only get the 6c code with my two high end tools.

Greetings, sorry for the delay, error code is p109, changed the crank sensor as a new replacement arrived, still now no injector pulse or spark, but zero fault codes now to work off..... No rpm still.

Get a landie they said.... lol gonna be something sillyI feel, not clued up enough yet with landies to be honest... Any further suggestions would be appreciated?

The OBD code should have 4 digits after the P so that 109 is not clear enough, if it was 0109 it was about MAP. As long as no rpm reading the sparks and injectors are inhibited by the ECU... swap the two big relays at the bottom of the interior fusebox(R3-R4) see if it helps and if not remove the lower one R4, bridge the perpendicular cavities(where the contact goes) with a wire and see if you get spark then...if not measure if you get 12V across the parallel cavities(where the coil goes) when you turn ignition on...allso check fuse F14

if no joy with the above check fuse F13 engine ebay and swap relays R9(main) with R8 there