How to Remove ECU from Car
Thread Starter
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Member
Joined: Jun 2011
Posts: 40
Likes: 2
From: uk
Hi all,
OK, at the OBD2 socket in the car at pins 6+14 it did measure 60 ohms, on the ECU at pins 123+124 it did measure 120 ohms.
I want to narrow the fault area down as much as possible before I jump in and buy a replacement ECU.
New at present around £750.00 + vat plus config.
I'm going to try and do some continuity test around the unit to see for something obvious.
regards.
OK, at the OBD2 socket in the car at pins 6+14 it did measure 60 ohms, on the ECU at pins 123+124 it did measure 120 ohms.
I want to narrow the fault area down as much as possible before I jump in and buy a replacement ECU.
New at present around £750.00 + vat plus config.
I'm going to try and do some continuity test around the unit to see for something obvious.
regards.
Thread Starter
|
Member
Joined: Jun 2011
Posts: 40
Likes: 2
From: uk
Just a note, I removed the ECU connector, put the battery connector back on, switched on and everything was as it was when the ECU had been fitted except the cooling fans did not come on?
Not sure what that means??
regards.
Not sure what that means??
regards.
Senior Member
Joined: Sep 2010
Posts: 242
Likes: 52
From: GEORGIA
ok well so far so good as for the cooling fans, they shouldnt come on unless the ac is running or the thermostat is stuck..If your thermostat is bad the cooling fans will run even when the car is off...here is a pic of the pins
Thread Starter
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Member
Joined: Jun 2011
Posts: 40
Likes: 2
From: uk
Hi,
Checked the grounds pins, 4,5,17,18,29,30,54,81,82,91,111,116 all OK,
Checked the power pins 7,10,22, pins 23,24 the ECM relay, did not have power, I assume the relay needs to be operating?
It looks like I've exhausted all areas to look into, and points to a faulty ECU unit.
Eurojag have been fantastic, they put me in contact with a local guy who has the Jaguar software to configure a replacement ECU.
Going to bite the bullet and send it to the garage.
I'll let you know what he finds.
Thanks to everyone for their help especially 912guy, what a great forum.
Checked the grounds pins, 4,5,17,18,29,30,54,81,82,91,111,116 all OK,
Checked the power pins 7,10,22, pins 23,24 the ECM relay, did not have power, I assume the relay needs to be operating?
It looks like I've exhausted all areas to look into, and points to a faulty ECU unit.
Eurojag have been fantastic, they put me in contact with a local guy who has the Jaguar software to configure a replacement ECU.
Going to bite the bullet and send it to the garage.
I'll let you know what he finds.
Thanks to everyone for their help especially 912guy, what a great forum.
Senior Member
Joined: Sep 2010
Posts: 242
Likes: 52
From: GEORGIA
Hi,
Checked the grounds pins, 4,5,17,18,29,30,54,81,82,91,111,116 all OK,
Checked the power pins 7,10,22, pins 23,24 the ECM relay, did not have power, I assume the relay needs to be operating?
It looks like I've exhausted all areas to look into, and points to a faulty ECU unit.
Eurojag have been fantastic, they put me in contact with a local guy who has the Jaguar software to configure a replacement ECU.
Going to bite the bullet and send it to the garage.
I'll let you know what he finds.
Thanks to everyone for their help especially 912guy, what a great forum.
Checked the grounds pins, 4,5,17,18,29,30,54,81,82,91,111,116 all OK,
Checked the power pins 7,10,22, pins 23,24 the ECM relay, did not have power, I assume the relay needs to be operating?
It looks like I've exhausted all areas to look into, and points to a faulty ECU unit.
Eurojag have been fantastic, they put me in contact with a local guy who has the Jaguar software to configure a replacement ECU.
Going to bite the bullet and send it to the garage.
I'll let you know what he finds.
Thanks to everyone for their help especially 912guy, what a great forum.
Thread Starter
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Member
Joined: Jun 2011
Posts: 40
Likes: 2
From: uk
Hi All,
OK, just got my car back today, a new ECU from jaguar, software installed, (after it was back and forth to jaguar 3 times) Now all sorted.
Just a note to all, check your drains and clear every week to avoid the £1200 repair bill!
Thanks again to everyone.
regards.
OK, just got my car back today, a new ECU from jaguar, software installed, (after it was back and forth to jaguar 3 times) Now all sorted.
Just a note to all, check your drains and clear every week to avoid the £1200 repair bill!
Thanks again to everyone.
regards.
Junior Member
Joined: Nov 2018
Posts: 4
Likes: 0
From: USA
you will need a tamper proof hex head drive...plus a 10mm socket,plus a 3/8 adaptor at least 10 inches...you start by removing the cowl on the front passnger side.It is the pollen filter housing. which is held by 4 10mm bolts.Once you remove them disconnect the washer lines be careful not to damage them,once the bolts are removed just lift the upper cowl rim up and the pollen housing,and you will see the ecu harness.It will be held to one 8 or 10mm bolt on each side,but the center harness bolt will be a tamper proof hex head.I think the size is 30 or 27.Once you remove these three then the harness will come out exposing the pins etc.Then you go inside to the passenger side kick panel and remove the inside bolts...Let me know..and also make sure you disconnect the neg term from batterry...happy wrenching.
Junior Member
Joined: Mar 2020
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Hello, I have a short question. How long should it usually take to disassamble the ECM ? My garage wants to charge me for 5 hours of work and i have no idea if this is ok or not. Many thanks for your help and greetings from Germany.
Member
Joined: Jun 2019
Posts: 59
Likes: 19
From: Western Tennessee
Unplug negative terminal on batteryOpen hood (bonnet)Pop off plastic fasteners holding the leaf guard/wind screenRemove cabin air filterRemove 4x 10 mm nuts for cabin air inletRemove connectors holding ECURemove 2x 10 mm nuts for ECU
~~underneath glovebox~~
Remove fabric cover beneath gloveboxECU now visible. Remove T27 bolt securing back of ECUECU now free. Wiggle out of the car (careful of nearby harnesses/cabin fuse box/footwell lighting)
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