First i had problem with immoboliser,starter wont crank cz of kill switch so i changed kill switch n then car cranks fine but when i put ignition on car main relay vibrates and gving some buzzer noisy on relay and
Car wont start ,,, so found a bad ground on ecu ground ,,
I cut those 3 wires from ecu and connects to directly to battery and then car starts n runs idle fine but there is no acceleration response dead no but rpm stays at 950rpm whats was the problem??.tq
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just nw i test ecu feeds ,
ecu signal input : wires gets ohm , there is connection ok
ecu supply output : there is two output supply 6v ( 1 output gets 6v and another gets 15.1mv miliamps )
ecu earth output : there is two output supply gets 13.1v
isit ok with milliamps ecu supply ?
update: i jumped 6v wire to another wire that doestnt having voltage , car starts , idle fine & can accelerate...
mil adn abs light still illuminate
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yep i checked but supply missing from ecu , there is milliamps from ecu isit something disabled the ecu ?
GrumpyGel
Well-Known Member
Have you got any diagnostic codes? A live feed would presumably show the TPS position - which would rule it in or out as the cause.
The TPS has 2 'potentiometers' - presumably linked to those dual inputs/feeds on the ECU. Rave says that it supplies them with 5 volts - not the 13.1 shown in the (working?) output on your diagram. It also says that if the TPS fails, it will lift revs to 1,250rpm - you're not seeing this, you're quoting 900rpm.
The ECU also takes input from the brake peddle and will "limit fuelling" if pressed - maybe it is getting a brake signal and not allowing TPS input. You do not necessarily have to see brake lights for a brake feed to be active. The brake switch is a complex thing with multiple outputs.
The TPS has 2 'potentiometers' - presumably linked to those dual inputs/feeds on the ECU. Rave says that it supplies them with 5 volts - not the 13.1 shown in the (working?) output on your diagram. It also says that if the TPS fails, it will lift revs to 1,250rpm - you're not seeing this, you're quoting 900rpm.
The ECU also takes input from the brake peddle and will "limit fuelling" if pressed - maybe it is getting a brake signal and not allowing TPS input. You do not necessarily have to see brake lights for a brake feed to be active. The brake switch is a complex thing with multiple outputs.
thx ,,
yeap i gt before when earthed problem once i remove them there is no amigo lights only mil light
the ecu earth was in short so i cut them and connect thm to battery negative terminal directly ... after tat no amigo light
hye sir, i rejoin those ground nw ok with grounding problem .. no more any vibrates and noise all
still the pedal sensor dead and i found there is no 5v supply at fuel rail sensor and 13.1v on ground and i unplugged fuell rail sensor wire ,, still car can start ,, this is normal or nt be should , tq sir
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Yes sir ,,i tried but there is still miliamps no 5v feed
GrumpyGel
Well-Known Member
From your descriptions, I'm not really sure of the problems you are experiencing. It sounds like the engine will start and run - just not respond to the accelerator peddle.
I am not familiar with the TD4 - should the EML light come on with the other lamps for self test - but also go out with them? If so why is the EML light lit? Have you been able to read the diagnostic codes?
I believe the TD4 ECU has a 'limp mode', and I believe the ECU will also inhibit start for various reasons, but I'm not sure if there is ever a reason why the ECU would allow 'idle only'.
I'm sure if ever there was a case to get diagnostics on a car - this is it. However, if that is not possible, it does look like the first part to swap out is the TPS - can you get parts from a breakers locally for Freelander?
I am not familiar with the TD4 - should the EML light come on with the other lamps for self test - but also go out with them? If so why is the EML light lit? Have you been able to read the diagnostic codes?
I believe the TD4 ECU has a 'limp mode', and I believe the ECU will also inhibit start for various reasons, but I'm not sure if there is ever a reason why the ECU would allow 'idle only'.
I'm sure if ever there was a case to get diagnostics on a car - this is it. However, if that is not possible, it does look like the first part to swap out is the TPS - can you get parts from a breakers locally for Freelander?
yeah i tried with ob2 scanner bluetooth model abit chepaer that connects to android , it connects to ecu after 2 sec it turn and say ecu N/A
it connects but says ecu N/A
yeah eml light goes out after self test, and come back in 1 sec bck , stay on
Tried what?
i check the voltage of fuel pressure sensor but there is no voltage at there n i use ecu scanner to data logging no fuel pressure on there ...
