Weird electrical gremlins

Briodyjl01 · 18th March 2024, 08:45

Good morning all.

Recently I’ve been having some strange electrical gremlins with one of my 75s

The cars a 53 plate 2.0 cdt tourer.
Before I carry on I’d say there is no water ingress into the car. No sunroof ect.

If you connect a battery up to it not long after it will drop all of its windows. Then every so often it flashes its hazard lights and you can keep hearing the car trying to unlock itself.

The other issue it has is with the dash lights.
Sometimes they are on sometimes they are not. I’ve had the clocks out checked the connectors on the rear all good. All the other connectors I’ve checked and all good.

I have had the car plugged into toaf and this shows the millage on the module as a random 300,000km and not the cars actual millage of 414,0000. The car still has the trip and millage not like it would if the lcm was unmatched.

My next port of call is to change the BCM and the LCM. Also the key barrel in the drivers door plus unplugging the actual door lock it self.

Has anyone come across these issues in the past? If so what was your outcome?

I’ve had a local forum member help me and look over the car too.
Thank you Biffa75 for that!

Best regards

Josh

Ken Lion · 18th March 2024, 09:28

Sorry I can't help with the problems but my jaw dropped at the mileage - 414k - is that a typo or actual?

Briodyjl01 · 18th March 2024, 09:35

That’s KM the car has 256k miles

Ken Lion · 18th March 2024, 09:52

Still impressive

SD1too · 18th March 2024, 10:00

Hi Josh,

Have you tried a different battery, perhaps from one of your other cars, after charging it for 24 hours?

Simon

Briodyjl01 · 18th March 2024, 10:02

Yes different batteries same thing even when on charge

SD1too · 18th March 2024, 10:09

OK, it sounds like a K-bus fault to me.

It's easy to unplug the driver's door window module so you could try that and see if the other faults remain or cease.

Simon

biffa75 · 18th March 2024, 10:37

"I’ve had a local forum member help me and look over the car too.
Thank you Biffa75 for that! "

Best regards

Josh

No problem at all ,anytime

BigRuss · 18th March 2024, 17:38

After 300,000 km, the LSM stops updating the mileage data from the IPK

Russ

bigblue75 · 18th March 2024, 18:04

I see Simon has already raised the possibility of a K bus fault. Does your car have a fuel burning heater?
I had some strange electrical events which stopped after unplugging the FBH - I never figured out what the problem with the FBH was as it was removed from the car and is currently somewhere in the spares box awaiting fitting to my current car... another to do with too little time and enthusiasm for it

18th March 2024, 08:45	#1
Briodyjl01 Gets stuck in Rover 75 Tourer, Rover 75 Saloon Join Date: May 2018 Location: Castleford Posts: 974 Thanks: 237 Thanked 185 Times in 113 Posts	Weird electrical gremlins Good morning all. Recently I’ve been having some strange electrical gremlins with one of my 75s The cars a 53 plate 2.0 cdt tourer. Before I carry on I’d say there is no water ingress into the car. No sunroof ect. If you connect a battery up to it not long after it will drop all of its windows. Then every so often it flashes its hazard lights and you can keep hearing the car trying to unlock itself. The other issue it has is with the dash lights. Sometimes they are on sometimes they are not. I’ve had the clocks out checked the connectors on the rear all good. All the other connectors I’ve checked and all good. I have had the car plugged into toaf and this shows the millage on the module as a random 300,000km and not the cars actual millage of 414,0000. The car still has the trip and millage not like it would if the lcm was unmatched. My next port of call is to change the BCM and the LCM. Also the key barrel in the drivers door plus unplugging the actual door lock it self. Has anyone come across these issues in the past? If so what was your outcome? I’ve had a local forum member help me and look over the car too. Thank you Biffa75 for that! Best regards Josh __________________ Too many Rovers to count ……

18th March 2024, 09:35	#3
Briodyjl01 Gets stuck in Rover 75 Tourer, Rover 75 Saloon Join Date: May 2018 Location: Castleford Posts: 974 Thanks: 237 Thanked 185 Times in 113 Posts	That’s KM the car has 256k miles __________________ Too many Rovers to count ……

18th March 2024, 10:00	#5
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,382 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hi Josh, Have you tried a different battery, perhaps from one of your other cars, after charging it for 24 hours? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

18th March 2024, 10:02	#6
Briodyjl01 Gets stuck in Rover 75 Tourer, Rover 75 Saloon Join Date: May 2018 Location: Castleford Posts: 974 Thanks: 237 Thanked 185 Times in 113 Posts	Yes different batteries same thing even when on charge __________________ Too many Rovers to count ……

18th March 2024, 10:09	#7
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,382 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	OK, it sounds like a K-bus fault to me. It's easy to unplug the driver's door window module so you could try that and see if the other faults remain or cease. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

18th March 2024, 09:28	#2
Ken Lion Gets stuck in R75 2.0 CDT Club SE Tourer Join Date: Oct 2013 Location: Manchester Posts: 614 Thanks: 105 Thanked 101 Times in 89 Posts	Sorry I can't help with the problems but my jaw dropped at the mileage - 414k - is that a typo or actual?

18th March 2024, 09:52	#4
Ken Lion Gets stuck in R75 2.0 CDT Club SE Tourer Join Date: Oct 2013 Location: Manchester Posts: 614 Thanks: 105 Thanked 101 Times in 89 Posts	Still impressive

18th March 2024, 10:37	#8
biffa75 Trader Mk1 2004 tourer cdti + MK1 2003 Saloon CDT Join Date: Nov 2015 Location: west yorkshire Posts: 495 Thanks: 106 Thanked 91 Times in 57 Posts	"I’ve had a local forum member help me and look over the car too. Thank you Biffa75 for that! " Best regards Josh No problem at all ,anytime

18th March 2024, 17:38	#9
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,405 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	After 300,000 km, the LSM stops updating the mileage data from the IPK Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

18th March 2024, 18:04	#10
bigblue75 older not wiser 75 Tourer Join Date: Oct 2014 Location: Falkirk Posts: 274 Thanks: 93 Thanked 46 Times in 35 Posts	K bus fault? I see Simon has already raised the possibility of a K bus fault. Does your car have a fuel burning heater? I had some strange electrical events which stopped after unplugging the FBH - I never figured out what the problem with the FBH was as it was removed from the car and is currently somewhere in the spares box awaiting fitting to my current car... another to do with too little time and enthusiasm for it