ecu problem?

2186 Views 15 Replies 4 Participants Last post by graphic, Sep 28, 2010

reindje

Discussion Starter · Sep 25, 2010

6 days since I am the proud owner of a 420 diesel from 1998. Unfortunately he did not do anything this afternoon....

I had a trailer on my Rover. Apparently this trailer caused a short circuit on the indicators. A fuse (I put a slightly heavier back, 20 instead of 10, dumb, dumb, dumb, probably) and then drove back. After I shut down the engine, he never started agian.

The situation at the moment:

- Everything works except:
- Starter
- Fuelpomp
- Dashboard indicator lights (battery light only when I want to start the engine).
- Flashing left and right (flashers do so well)

A couple of questions:

- Is this probably due to a broken / blown ECU?
- Can I replace it myself?
- Will i have some problems with my remote (which still just works, both alarm and open/close doors)

I hope someone with some experience ...

Thanks in advance!

1 - 16 of 16 Posts

Sejin26

· #2 · Sep 25, 2010

If anything you could have bown a fuse link under the bonnet. Also you could have blown a relay which is stopping the starter motor etc.

I doubt you will have done any majour damage to the ECU.

I would check all the fuses under the bonet and under the steering wheel and then check the relays. Any relays you can change with another to test them I would and then least you can rule it out.

reindje

Discussion Starter · #3 · Sep 26, 2010 (Edited)

Thanks for your quick respons!

We checked al the fuses on both places and there are all ok. I just checked also the relay near the ecu, and that relay works fine.

When we put some power on the enginepump, and the starter, the motor will run. But without indicators as speed, tempeture etc in the dashboard.

When we connect a computer to the ecu, it seems the ecu is out of power and the signal is dead. Is there a way to double check if the ecu is the problem?

Thanks again!

steely

· #4 · Sep 26, 2010

try earthing the body of the ecu to the bodywork. its been known for the earth wire inside the ecu to burn out but its usually when jumpstarting that happens

graphic

· #5 · Sep 26, 2010

It still sounds like a broken fuse link under the bonnet, check the ones in the fusebox and the ones on the left inner wing with a test lamp or meter. (Sometimes they "look" ok when they are not)

reindje

Discussion Starter · #6 · Sep 26, 2010

steely said:
try earthing the body of the ecu to the bodywork. its been known for the earth wire inside the ecu to burn out but its usually when jumpstarting that happens

Thanks, Like the picture below? Nothing happens :-(

See less See more

reindje

Discussion Starter · #7 · Sep 26, 2010

graphic said:
It still sounds like a broken fuse link under the bonnet, check the ones in the fusebox and the ones on the left inner wing with a test lamp or meter. (Sometimes they "look" ok when they are not)

Thanks, We test both of the fuseboxes with a meter and found no problems

reindje

Discussion Starter · #8 · Sep 26, 2010

steely said:
try earthing the body of the ecu to the bodywork. its been known for the earth wire inside the ecu to burn out but its usually when jumpstarting that happens

Thanks! I tried as you can see on this picture:

http://www.houwen.info/rover/IMAGE_003.jpg

Is that ok? Nothing happens :-(.

graphic

· #9 · Sep 26, 2010

Try following the feed into and out of the ignition switch as you turn the key?

reindje

Discussion Starter · #10 · Sep 26, 2010

steely said:
try earthing the body of the ecu to the bodywork. its been known for the earth wire inside the ecu to burn out but its usually when jumpstarting that happens

Thanks, I already replied with a foto, but the moderator must aprove this reply...

reindje

Discussion Starter · #11 · Sep 26, 2010

graphic said:
Try following the feed into and out of the ignition switch as you turn the key?

Sorry, I do not understand you. What do you mean by 'following the feed into and out of the ingition swicht?

Thanks again!

graphic

· #12 · Sep 26, 2010

The multiplug for the ignition switch should have a permanent live to it and should be connected to the other terminals as you move the key.

Sejin26

· #13 · Sep 26, 2010

As a long shot it could be the loom that runs down the right hand side of the rad at the front of the car. If its chafed then you get a similiar issues to what you have.

reindje

Discussion Starter · #14 · Sep 27, 2010

I started this weekend with measuring everything. After the battery has been known for some time off, something changed. I now have some lights on the dashboard. So now the check engine light and glowlight (it is a diesel) both are on. The problem is that they are on all the time, even when I pull out the key.

Could it be possibly the relay module, which is placed rear the ECM in the engine compartment? Or is it a blown ECM? Or maybe the wires? Anyone on how to check this?

Thanks a lot, again!

reindje

Discussion Starter · #15 · Sep 27, 2010

Sejin26 said:
As a long shot it could be the loom that runs down the right hand side of the rad at the front of the car. If its chafed then you get a similiar issues to what you have.

When you read my previous post, it can be stil this problem? Can you explain to me what excatly a "loom" is and where I can find it?

Thank a lot for helping me out here, I appreciate it!

graphic

· #16 · Sep 28, 2010

A "loom" is all the wires taped together. Sejin's post is a very good place to look as you have all the right symptoms for it to be damaged wiring

1 - 16 of 16 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.