Speedo problems

Bozzy1954 · 28th June 2017, 08:23

Hi, The car went for a mot last week which it passed with no problems but on the way back the mechanic noticed the speedo was not working also the steering wheel controls for the radio not working and central locking didn't operate when it got to 5 mph, so we checked all the fuses inside and under the bonnet cleaned them all still nothing working, any ideas what else to check.?

Chris.

marinabrian · 28th June 2017, 08:50

It needs to be sprinkled with water from St Ann's well

On the other hand the OSF ABS sensor and or wheel bearing needs looking at

Brian

Bozzy1954 · 28th June 2017, 09:01

Thanks mate I'll investigate further.

HarryM1BYT · 28th June 2017, 09:30

Quote:

Originally Posted by marinabrian

It needs to be sprinkled with water from St Ann's well

On the other hand the OSF ABS sensor and or wheel bearing needs looking at

Brian

In which case, the ABS would be complaining too. So did it pass with the ABS light on, or with the ABS light blanked out

.

Bozzy1954 · 28th June 2017, 14:18

no abs lights, no lights on the dash at all

SD1too · 28th June 2017, 14:54

I think that you may have a multiplex fault Christopher. A faulty OSF ABS sensor would not cause the other faults you mention.

Simon

Bogbrush82 · 28th June 2017, 16:14

Shouldn't a non working speedo have resulted in an MOT fail?

HarryM1BYT · 28th June 2017, 16:26

Quote:

Originally Posted by Bogbrush82

Shouldn't a non working speedo have resulted in an MOT fail?

Absolutely, but they don't road test them so likely would not spot the fault on the rolling road.

Are you saying the ABS warning light comes on at switch on, then goes off, or never comes on at all?

There is a naughty circuit which can be used to fool an MOT tester, but it would be more common for someone to do that by blanking the light with a bit of tape to cover it.

Bozzy1954 · 28th June 2017, 17:09

When I start the car dash lights up normally then all lights go off.

HarryM1BYT · 28th June 2017, 19:06

Quote:

Originally Posted by Bozzy1954

When I start the car dash lights up normally then all lights go off.

Which suggests the O/S/F sensor passes basic diagnostics. Does the ABS cut in on a slippy surface, like wet grass. If so it suggests the speedo is somehow not receiving the speed pulses from the O/S/F sensor.

28th June 2017, 08:23	#1
Bozzy1954 Newbie Rover 75 conseur se cdti touer Join Date: Sep 2012 Location: Buxton Posts: 16 Thanks: 9 Thanked 0 Times in 0 Posts	Speedo problems Hi, The car went for a mot last week which it passed with no problems but on the way back the mechanic noticed the speedo was not working also the steering wheel controls for the radio not working and central locking didn't operate when it got to 5 mph, so we checked all the fuses inside and under the bonnet cleaned them all still nothing working, any ideas what else to check.? Chris.

28th June 2017, 14:54	#6
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: 20,375 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	I think that you may have a multiplex fault Christopher. A faulty OSF ABS sensor would not cause the other faults you mention. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

28th June 2017, 16:14	#7
Bogbrush82 I really should get out more....... BMW X3 2.0D Join Date: May 2017 Location: Tipton Posts: 2,383 Thanks: 51 Thanked 765 Times in 421 Posts	Shouldn't a non working speedo have resulted in an MOT fail? __________________ Current car: BMW x3 2.0d (The one with the M47 engine!) Rolled off the line on December 14th, 2004.

28th June 2017, 08:50	#2
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	It needs to be sprinkled with water from St Ann's well On the other hand the OSF ABS sensor and or wheel bearing needs looking at Brian

28th June 2017, 09:01	#3
Bozzy1954 Newbie Rover 75 conseur se cdti touer Join Date: Sep 2012 Location: Buxton Posts: 16 Thanks: 9 Thanked 0 Times in 0 Posts	Thanks mate I'll investigate further.

28th June 2017, 14:18	#5
Bozzy1954 Newbie Rover 75 conseur se cdti touer Join Date: Sep 2012 Location: Buxton Posts: 16 Thanks: 9 Thanked 0 Times in 0 Posts	no abs lights, no lights on the dash at all

28th June 2017, 17:09	#9
Bozzy1954 Newbie Rover 75 conseur se cdti touer Join Date: Sep 2012 Location: Buxton Posts: 16 Thanks: 9 Thanked 0 Times in 0 Posts	When I start the car dash lights up normally then all lights go off.