ECU issues?

Kenneth Smith · 26th June 2018, 21:06

Hi Everyone, I have had my local Garage look at my 2001 Rover 75 diesel Club today as I am experiencing problems with the ABS light coming on and Speedo not working on occasions and sometimes a minor shudder from the Brake Pedal when braking lightly. I can remove problem by switching off the engine and restarting it but the faults come back. The Garage have tried another ABS Sensor on the O.S. front wheel as original scuffed, but no change. They say the ECU has many error codes on it which they can't remove and suggest I have a faulty ECU. All this has happened since I had the front springs replaced recently as one had broken. Also when ABS light comes on the Brake Pedal shuddering does not happen only happens when ABS light off. Need help please. Regards Ken

trikey · 26th June 2018, 21:10

Marinabrian will be able to test your ecu if you want to post it to him.

slovcan · 27th June 2018, 03:49

Quote:

Originally Posted by Kenneth Smith

Hi Everyone, I have had my local Garage look at my 2001 Rover 75 diesel Club today as I am experiencing problems with the ABS light coming on and Speedo not working on occasions and sometimes a minor shudder from the Brake Pedal when braking lightly. I can remove problem by switching off the engine and restarting it but the faults come back. The Garage have tried another ABS Sensor on the O.S. front wheel as original scuffed, but no change. They say the ECU has many error codes on it which they can't remove and suggest I have a faulty ECU. All this has happened since I had the front springs replaced recently as one had broken. Also when ABS light comes on the Brake Pedal shuddering does not happen only happens when ABS light off. Need help please. Regards Ken

The OS front wheel ABS sensor is the right place to look, but ALSO the wiring TO that sensor. A wire may be loose in the plug or chafed on a sharp edge somewhere. It is almost certainly a wiring problem resulting from a routing error during the spring change.

Some of the ECU codes may be related to the ABS (& maybe TCS, if equipped) and some may be nothing to worry about and totally unrelated. Ask the garage to write down the codes for you. Then someone here can translate them and offer advice.

Cheers,
Glenn

cb750chris · 28th June 2018, 11:50

We had a quick look at this last night.
There was a fault related to the front right abs sensor (plausibility), which has been cleared. The car was then taken for a test drive, and all sensors reported similar data. The light did not come back on during the test drive, hopefully it has stayed off?
I also put the connectors back in place on the inner wing.

Any further news Ken?

26th June 2018, 21:06	#1
Kenneth Smith Avid contributor Rover 75 1.8T Tourer Join Date: Jan 2010 Location: Hayling Island Posts: 214 Thanks: 56 Thanked 7 Times in 7 Posts	ECU issues? Hi Everyone, I have had my local Garage look at my 2001 Rover 75 diesel Club today as I am experiencing problems with the ABS light coming on and Speedo not working on occasions and sometimes a minor shudder from the Brake Pedal when braking lightly. I can remove problem by switching off the engine and restarting it but the faults come back. The Garage have tried another ABS Sensor on the O.S. front wheel as original scuffed, but no change. They say the ECU has many error codes on it which they can't remove and suggest I have a faulty ECU. All this has happened since I had the front springs replaced recently as one had broken. Also when ABS light comes on the Brake Pedal shuddering does not happen only happens when ABS light off. Need help please. Regards Ken

28th June 2018, 11:50	#4
cb750chris Trader Rover 75 Tourer Join Date: Apr 2011 Location: Portsmouth Posts: 849 Thanks: 201 Thanked 292 Times in 200 Posts	We had a quick look at this last night. There was a fault related to the front right abs sensor (plausibility), which has been cleared. The car was then taken for a test drive, and all sensors reported similar data. The light did not come back on during the test drive, hopefully it has stayed off? I also put the connectors back in place on the inner wing. Any further news Ken? __________________ Now offering T4 services in the Fareham area Replacement keys programmed / supplied / cut Diesel 135 upgrade available IPK virginisation and T4 matching available Sorry, due to a big change in home circumstances, I am unable to do any large jobs at present, but can still offer evening time diagnostics.

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26th June 2018, 21:10	#2
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,760 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Marinabrian will be able to test your ecu if you want to post it to him.