2009 1.6lt diesel ecu fault now no immobiliser key light

Shrek73 · **May 02, 2020, 02:01:00**

Hi all new to this forum but in desperate need for some help. My Brother in-laws I30 has had some issues to say the least but short version is ECU, BCM have been replaced everything has been programmed together but I have no power to the antenna coil. I have this little box left over from the kit that they say is under the dash but I can’t find it. Does anyone have any ideas where this is and what actually supplies power to the antenna coil.

tw2005 · **Reply #1: May 02, 2020, 02:42:36**

you will find it challenging to reach, but it is directly at the top of the metal structure that the dash and column mounts to. Effectively behind the cluster but you won't reach it from there.

Dropping the coulmn may help or a contortionist inverted in the foot whell, and flashlight, you may spot it. How sure are you th eissues were the ECU?

The BCM only comes into play for the remote.

The unit you hold is SMARTRA, or the immobiliser unit. Also with ECU swap you should reload the injector codes into the ECU. Won't affect it running, may affect it running optimally

tw2005 · **Reply #2: May 02, 2020, 02:47:13**

likely LHD but you get a good idea from this image

Shrek73 · **Reply #3: May 02, 2020, 05:35:43**

Hi ECU was shot had no main relay pulling in unless you put a test light on the fuse then it chatted it’s arse off and test light was dull unplug the ECU and it went away. Also on turning the key had no check engine light and no car with key in it on dash. Once ECU was replaced all checked out ok apart from this issue with no power to the antenna coil. Had a Auto locksmith program everything and he managed to change the SMARTRA to sync with new ECU and BCM all appeared to work ok but still nothing for the immobiliser to recognise the key. With no power to the coil. Will go hunting now to replace SMARTRA and see what happens from there.

Shrek73 · **Reply #4: May 02, 2020, 06:27:04**

Ok so that was the best experience of my life who would put something there like that. Would have been worth it if it fixed it still no power at the antenna coil. Open to any and all suggestions if you have any but huge thanks for at least getting that part out the way.

tw2005 · **Reply #5: May 02, 2020, 06:59:27**

you should check recent threads, guy in REUNION had exact same fault in 1.4 petrol, opened ECU with heat gun, reapaired blown tracks and fixed.

tw2005 · **Reply #6: May 02, 2020, 07:00:23**

electrical wiring diagram

tw2005 · **Reply #7: May 02, 2020, 08:58:03**

I wonder about that inj fuse 15A, sounds like no power to smartra,

nzenigma · **Reply #8: May 02, 2020, 22:59:21**

Quote from: Shrek73 on May 02, 2020, 06:27:04

Ok so that was the best experience of my life who would put something there like that. Would have been worth it if it fixed it still no power at the antenna coil. Open to any and all suggestions if you have any but huge thanks for at least getting that part out the way.

Its to stop incompetent car thieves, thats why its up there.

Quote from: tw2005 on May 02, 2020, 06:59:27

you should check recent threads, guy in REUNION had exact same fault in 1.4 petrol, opened ECU with heat gun, reapaired blown tracks and fixed.

Wait up mate

that guy has fixed nothing. The fault ( whatever component fried the print board) still exists.

The wiring diagram will be of assistance if @Shrek73 can work with it.

Good luck, my guess, given this mass component change

is that the original fault still exists.

Shrek73 · **Reply #9: May 03, 2020, 00:14:23**

I have no power either side of these three fuses interesting that one says start are these fuse boxes known to fail at all or can anyone tell me where this section gets its supply from as I have opened it up and everything looks ok nothing burnt or track lifted.

tw2005 · **Reply #10: May 03, 2020, 00:25:40**

I don't have my info with me, I'd look in the engine bay, fusible links, maybe 30A ? guessing

tw2005 · **Reply #11: May 03, 2020, 00:26:37**

could be ECU 30A fusible? is the main relay functional?

Shrek73 · **Reply #12: May 03, 2020, 01:06:05**

Everything else is ok ECU and main relay seem to operate ok except I can’t start the car. I have been working on this for ages and can’t seem to get to the bottom.

nzenigma · **Reply #13: May 03, 2020, 04:35:27**

At the moment Im without a cct. Just looked at above cct and dont think it will help you here. However the start fuse ( 10A) protects Ignition switch lock, ICM relay, transaxle range switch, E/R junction box (start relay)

My crystal ball says

that start fuse should be hot at all times; if not, hot when ign switch is on. Does the start relay pull in? Suspect it is going to the start relay coil. One contact side of the start relay will be always hot.

Sorry the workshop data I have just has rote style 'do this and that' for mechanics. I dont have an FD here at the moment.

Edit

@Shrek73 Just Noted that ignition switch supplies B+ to pin K2 ( my cct) of ECU. no 12+ at fuse = fault

The Gonz · **Reply #14: May 03, 2020, 04:47:17**

Quote from: nzenigma on May 03, 2020, 04:35:27

I dont have an FD here at the moment.

tw2005 · **Reply #15: May 03, 2020, 05:22:07**

Those fuses, may be a red herring.

Start fuse 10a will only have power in the "START" posiition of the ignition barrel.

IGN2 Fusible link 40A is HOT all times to the ignition switch

Could be worth checking the junction box connectors if they have been disturbed

Power goes in at I/P-A pin 8, through the 10A fuse to the ICM relay box, burglar alarm relay controlled earth by BCM on other side.

I'd say if the car is armed no earth appears

Normal would be earthed, this then closes contacts, sends 12v to range switch, if in correct starting postions, will send power to start relay,

energises solenoid, starter rotates engine

tw2005 · **Reply #16: May 03, 2020, 05:24:52**

tw2005 · **Reply #17: May 03, 2020, 05:26:16**

Quote from: nzenigma on May 03, 2020, 04:35:27

At the moment Im without a cct. Just looked at above cct and dont think it will help you here. However the start fuse ( 10A) protects Ignition switch lock, ICM relay, transaxle range switch, E/R junction box (start relay)

My crystal ball says that start fuse should be hot at all times; if not, hot when ign switch is on. Does the start relay pull in? Suspect it is going to the start relay coil. One contact side of the start relay will be always hot.

Sorry the workshop data I have just has rote style 'do this and that' for mechanics. I dont have an FD here at the moment.

Edit

@Shrek73 Just Noted that ignition switch supplies B+ to pin K2 ( my cct) of ECU. no 12+ at fuse = fault

I guess this is a short a CCT then

Shrek73 · **Reply #18: May 03, 2020, 05:36:00**

Start relay comes energises on crank so that works but those 3 fuses stay dead no matter what position the key is in. can’t tell if there is power going through the contacts though but relay is energising

tw2005 · **Reply #19: May 03, 2020, 05:38:03**

A/CON SW FUSE 10A

Is this AUTO climate control or the manual AC?

I don't think it's related to your issues

tw2005 · **Reply #20: May 03, 2020, 05:39:17**

Quote from: Shrek73 on May 03, 2020, 05:36:00

Start relay comes energises on crank so that works but those 3 fuses stay dead no matter what position the key is in. can’t tell if there is power going through the contacts though but relay is energising

Should ask, AUTO or Manual

tw2005 · **Reply #21: May 03, 2020, 05:42:28**

tw2005 · **Reply #22: May 03, 2020, 05:54:36**

Any codes logged? P1691?

tw2005 · **Reply #23: May 03, 2020, 05:56:32**

tw2005 · **Reply #24: May 03, 2020, 06:00:02**

tw2005 · **Reply #25: May 03, 2020, 06:03:31**

When you check power at antenna, is load removed and at what point , sequence is it measured

tw2005 · **Reply #26: May 03, 2020, 06:16:23**

Voltage check

tw2005 · **Reply #27: May 03, 2020, 06:30:35**

tw2005 · **Reply #28: May 03, 2020, 06:34:04**

ground checks

tw2005 · **Reply #29: May 03, 2020, 06:35:32**

With the antenna coil removed, the coil resistance is 8.5ohms