No speedo - help please!

Odd Job · 27th February 2022, 15:50

Hi all,

I'm after a bit of help with my ZT please. MK II 2.0 Diesel

My car sits all week at work. It just gets used at the weekends.
On friday when I fired the car up, it sounded a little lazy turning the car over.
So I used works battery tester and it read "Good battery - recharge"
The battery is only 3 months or so old.

So after traveling home on Friday, I removed the battery. Charged it up over night and refitted it on the Saturday morning.

I came to go out in it today ( Sunday ) and found that now my speedo doesn't work, my handbrake warning light is on all the time and non of my electric windows work. My doors don't auto lock when I drive off either. My display that tells me MPG / Trip / Average speed etc is also inoperative.

I've checked every fuse I can find. Both in the engine bay and in the passenger footwell fuse box. All fuses are fine.

The ECU is dry. I regularly check the drains.

I have removed the battery several times in the time I have had the car and never had a problem. I'm at a complete loss.

If anyone has an ideas what I could try please?

Many thanks

Richard

Yorkshire GOC · 27th February 2022, 16:20

Check your ECU -located in the passenger side plenum chamber - to see if any water ingress in view of the range of issues you have. Diesel ECU's are prone to water damage as they are unsealed.

If it was just a non working Speedo and hand brake light on continually i would suspect an ABS fault - either the ABS sensors or the ABS ECU - normally a sensor/wiring fault throws a warning light but have known them not to. It seems to be the front sensor or its wiring that cause issues and its located front nearside wheel.

Odd Job · 27th February 2022, 17:06

Thanks Yorkshire GOC,

ECU is dry. The plenum gets checked regularly.
I'm really thinking it is an ECU fault though, as the list of items are a bit random.

No Speedo.
Electric windows inoperative.
Handbrake light on constantly.
IPK screen inoperative.
Self locking when you drive off inoperative.

All other items work ( at the moment )

Yorkshire GOC · 27th February 2022, 17:16

If you think it is the ECU drop Big Russ a PM to see what he thinks - he is a T4/ECU wizard - based at Liversedge - he also carries multiple diesel ECU's which if required he can programme to your car.

trikey · 27th February 2022, 18:04

You have water somewhere, do you have a sunroof or highline sat nav fitted?

Odd Job · 27th February 2022, 18:09

Hi trikey.

No sunroof. No high line fitted.

Where do I look for water ingress?

Odd Job · 27th February 2022, 18:10

Quote:

Originally Posted by Yorkshire GOC

If you think it is the ECU drop Big Russ a PM to see what he thinks - he is a T4/ECU wizard - based at Liversedge - he also carries multiple diesel ECU's which if required he can programme to your car.

How far is that from Derby?

trikey · 27th February 2022, 18:32

Quote:

Originally Posted by Odd Job

How far is that from Derby?

An hour and a halfs drive.

Odd Job · 28th February 2022, 05:59

Not sure what I'm doing wrong, but I cant find Big Russ on the user list to send him a message.

Can anyone help put me in touch with him please ?

another_clean_sheet · 28th February 2022, 06:24

Quote:

Originally Posted by Odd Job

Not sure what I'm doing wrong, but I cant find Big Russ on the user list to send him a message.

Can anyone help put me in touch with him please ?

https://the75andztclub.co.uk/forum/member.php?u=1792

27th February 2022, 15:50	#1
Odd Job Gets stuck in MG ZT 2.0 cdti Join Date: Aug 2019 Location: Derby Posts: 909 Thanks: 298 Thanked 191 Times in 149 Posts	No speedo - help please! Hi all, I'm after a bit of help with my ZT please. MK II 2.0 Diesel My car sits all week at work. It just gets used at the weekends. On friday when I fired the car up, it sounded a little lazy turning the car over. So I used works battery tester and it read "Good battery - recharge" The battery is only 3 months or so old. So after traveling home on Friday, I removed the battery. Charged it up over night and refitted it on the Saturday morning. I came to go out in it today ( Sunday ) and found that now my speedo doesn't work, my handbrake warning light is on all the time and non of my electric windows work. My doors don't auto lock when I drive off either. My display that tells me MPG / Trip / Average speed etc is also inoperative. I've checked every fuse I can find. Both in the engine bay and in the passenger footwell fuse box. All fuses are fine. The ECU is dry. I regularly check the drains. I have removed the battery several times in the time I have had the car and never had a problem. I'm at a complete loss. If anyone has an ideas what I could try please? Many thanks Richard __________________ ….And the latest thing to break is..... ### MG STANDS FOR "MY GREMLIN" !!! Last edited by Odd Job; 27th February 2022 at 17:02..

27th February 2022, 16:20	#2
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,067 Thanks: 1,842 Thanked 623 Times in 469 Posts	Check your ECU -located in the passenger side plenum chamber - to see if any water ingress in view of the range of issues you have. Diesel ECU's are prone to water damage as they are unsealed. If it was just a non working Speedo and hand brake light on continually i would suspect an ABS fault - either the ABS sensors or the ABS ECU - normally a sensor/wiring fault throws a warning light but have known them not to. It seems to be the front sensor or its wiring that cause issues and its located front nearside wheel. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

27th February 2022, 17:06	#3
Odd Job Gets stuck in MG ZT 2.0 cdti Join Date: Aug 2019 Location: Derby Posts: 909 Thanks: 298 Thanked 191 Times in 149 Posts	Thanks Yorkshire GOC, ECU is dry. The plenum gets checked regularly. I'm really thinking it is an ECU fault though, as the list of items are a bit random. No Speedo. Electric windows inoperative. Handbrake light on constantly. IPK screen inoperative. Self locking when you drive off inoperative. All other items work ( at the moment ) __________________ ….And the latest thing to break is..... ### MG STANDS FOR "MY GREMLIN" !!!

27th February 2022, 17:16	#4
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,067 Thanks: 1,842 Thanked 623 Times in 469 Posts	If you think it is the ECU drop Big Russ a PM to see what he thinks - he is a T4/ECU wizard - based at Liversedge - he also carries multiple diesel ECU's which if required he can programme to your car. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

27th February 2022, 18:04	#5
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,772 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	You have water somewhere, do you have a sunroof or highline sat nav fitted? __________________ Lest we forget..

27th February 2022, 18:09	#6
Odd Job Gets stuck in MG ZT 2.0 cdti Join Date: Aug 2019 Location: Derby Posts: 909 Thanks: 298 Thanked 191 Times in 149 Posts	Hi trikey. No sunroof. No high line fitted. Where do I look for water ingress? __________________ ….And the latest thing to break is..... ### MG STANDS FOR "MY GREMLIN" !!!

28th February 2022, 05:59	#9
Odd Job Gets stuck in MG ZT 2.0 cdti Join Date: Aug 2019 Location: Derby Posts: 909 Thanks: 298 Thanked 191 Times in 149 Posts	Not sure what I'm doing wrong, but I cant find Big Russ on the user list to send him a message. Can anyone help put me in touch with him please ? __________________ ….And the latest thing to break is..... ### MG STANDS FOR "MY GREMLIN" !!!