P38A 2.5 DHSE Electrical

Jomac · Mar 23, 2020

I want to do some electrical mods on my 2000 plate Range Rover. Can anyone help me with a wiring diagram?
TIA

Henry_b · Mar 23, 2020

Download RAVE..

Jomac · Mar 23, 2020

Rave, whats that?

Mark Piercy · Mar 23, 2020

It's a bible for the '38, it contains all the details needed for your bus.

Henry_b · Mar 23, 2020

It's the repair manual for the P38 and associated models.

Available as a free PDF..

Jomac · Mar 23, 2020

Unfortunately that link doesnt seem to work for me

Mark Piercy · Mar 23, 2020

https://www.landyzone.co.uk/land-ro...lus-other-useful-info-on-range-rovers.322195/
Is this any help

wammers · Mar 24, 2020

Jomac said:
I want to do some electrical mods on my 2000 plate Range Rover. Can anyone help me with a wiring diagram?
TIA

What wiring mods do you want to do?

Datatek · Mar 24, 2020

Mess with the wiring on the P38 and you could end up in a world of pain unless you know what you are doing with electronics.

wammers · Mar 24, 2020

Datatek said:
Mess with the wiring on the P38 and you could end up in a world of pain unless you know what you are doing with electronics.

+1

Jomac · Mar 24, 2020

Thanks for the help guys, i eventually found the workshop manual PDF which didnt include much wiring info, i then found the wiring info in another PDF

wammers said:
What wiring mods do you want to do?

I have 2 kits to fit, one is a remote key fob system which is more secure than the original system which doesn't work anyway (I have an electrical/electronics background) this outputs various signals, lock/unlock and disable for disabling the starting of the vehicle. From what i have seen in the wiring diagram, this unit will have to be mounted inside the drivers door and connected to the lock/unlock in the door lock, the disable line fed into the car.

The second kit is a one button start/stop. This needs the disable signal and a connection to the oil light and ignition light, also a signal from park and neutral (Automatic) and a signal from handbrake on. This module outputs ignition on and start.

So the diagram was needed to find the various wires and colours to tap into.

wammers · Mar 24, 2020

Jomac said:
Thanks for the help guys, i eventually found the workshop manual PDF which didnt include much wiring info, i then found the wiring info in another PDF

I have 2 kits to fit, one is a remote key fob system which is more secure than the original system which doesn't work anyway (I have an electrical/electronics background) this outputs various signals, lock/unlock and disable for disabling the starting of the vehicle. From what i have seen in the wiring diagram, this unit will have to be mounted inside the drivers door and connected to the lock/unlock in the door lock, the disable line fed into the car.

The second kit is a one button start/stop. This needs the disable signal and a connection to the oil light and ignition light, also a signal from park and neutral (Automatic) and a signal from handbrake on. This module outputs ignition on and start.

So the diagram was needed to find the various wires and colours to tap into.

You may end up in a mess doing these things. Personally i would get the standard locking working correctly before even considering your mods..

Jomac · Mar 24, 2020

wammers said:
You may end up in a mess doing these things. Personally i would get the standard locking working correctly before even considering your mods..

After a morning working on it and doing a few mods in the workshop and now have the new fob system working. My only issue was the door circuits are all 5v logic levels and the new key unit 12v but a bit of thinking later i had a work around and also have the immobilise signal to feed the start/stop system which again i suspect will be 5 volts

Datatek · Mar 24, 2020

Jomac said:
After a morning working on it and doing a few mods in the workshop and now have the new fob system working. My only issue was the door circuits are all 5v logic levels and the new key unit 12v but a bit of thinking later i had a work around and also have the immobilise signal to feed the start/stop system which again i suspect will be 5 volts

If you turn of EKA and the immobiliser in the BECM, it will make life easier.

Jomac · Mar 24, 2020

Can you enlighten me here Datatek? Doesn t the BECM have its own diagnostics port?

Datatek · Mar 25, 2020

Jomac said:
Can you enlighten me here Datatek? Doesn t the BECM have its own diagnostics port?

BECM is accessed via the OBD port using diagnostics such as Nanocom.

Jomac · Mar 25, 2020

I went to my friends garage and he has a professional OBD tablet costing some £2000+ He had a look to see if he could get the fob working. He couldn't see anything that remotely suggested the BECM, just general diagnostics, engine, transmission ABS etc. I don't know if its related but the interior lights dont work, puddle lights do

RangeRoller dt · Mar 25, 2020

My mate fitted a start stop. Couldnt work out why, still had to put key in and turn it?

Fancy smanchy diagnostics won’t usually talk to a P38, only specific ones do.

RangeRoller dt · Mar 25, 2020

Try holding middle button on int light switch with ign on. Itl come up with a message on the dash on/off

Grrrrrr · Mar 25, 2020

Wiring diagrams are at the end in the electrical troubleshooting section in my version of RAVE.

I'm with Wammers on this. There's nothing wrong with the original fob setup. Half the time the owners cannot get into or start the damn thing with the proper key. Any theif that gets it going has earned it.

P38A 2.5 DHSE Electrical

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