Speedo not working and abs/ebd lights on fixed

P505DEF · Apr 22nd, 2017, 12:52

This problem is the abs pump computer located on side of the pump. Takes approx 10 mins

Required tools T20 torx socket, 1/4 inch ratchet, extension bars, 13mm socket, 10mm socket, flat screw driver.

Remove battery neg lead 10mm
Use flat screw driver to release multi plug locking arm on abs pump wiring
Remove plug
Use 13mm socket to remove PAS pipe bracket and coolant pipe bracket
Use 13mm socket to undo the ABS pump locating bolts
Lift ABS pump up gently leaving all pipes connected, needs to be about as high as the pulley
Remove lower multi plug
Remove all 6 T20 screws on pump ecu
Pull ecu from pump

Refit is exact opposite of removal.
Time taken 20 mins.
Part cost £10 from scrap yard.
Part number Bosch 0-273-004-224 Volvo 966306.
Interchangable across years.
Advantage of this method is no need to bleed brakes

Uncle Tom Cobley · Apr 23rd, 2017, 20:58

Just as a matter of interest I had similar symptoms, the speedo stopped working and the ABS light was on.

In my case it was one of the ABS sensors on the wheel hub.

ww1dm1 · Apr 24th, 2017, 08:53

Uhh honestly I would start with a less complicated and more common problem - ABS sensor fault.

P505DEF · Apr 26th, 2017, 21:04

Sorry should have made it a bit clearer, the car had no communication with the ABS module via Vida, so the car was tricking itself into not being fitted, being as the speedo is driven through the abs sensors and the sensors therefore had no power due to the pump control unit not working

Apr 22nd, 2017, 12:52	#1
P505DEF Master Member Last Online: Yesterday 17:02 Join Date: Apr 2014 Location: Stroud	Speedo not working and abs/ebd lights on fixed This problem is the abs pump computer located on side of the pump. Takes approx 10 mins Required tools T20 torx socket, 1/4 inch ratchet, extension bars, 13mm socket, 10mm socket, flat screw driver. Remove battery neg lead 10mm Use flat screw driver to release multi plug locking arm on abs pump wiring Remove plug Use 13mm socket to remove PAS pipe bracket and coolant pipe bracket Use 13mm socket to undo the ABS pump locating bolts Lift ABS pump up gently leaving all pipes connected, needs to be about as high as the pulley Remove lower multi plug Remove all 6 T20 screws on pump ecu Pull ecu from pump Refit is exact opposite of removal. Time taken 20 mins. Part cost £10 from scrap yard. Part number Bosch 0-273-004-224 Volvo 966306. Interchangable across years. Advantage of this method is no need to bleed brakes

Apr 23rd, 2017, 20:58	#2
Uncle Tom Cobley Member Last Online: Oct 26th, 2020 10:00 Join Date: Dec 2007 Location: Sussex	Just as a matter of interest I had similar symptoms, the speedo stopped working and the ABS light was on. In my case it was one of the ABS sensors on the wheel hub.

Apr 24th, 2017, 08:53	#3
ww1dm1 What is this I don't even Last Online: Aug 31st, 2017 08:01 Join Date: Mar 2015 Location: *	Uhh honestly I would start with a less complicated and more common problem - ABS sensor fault.

Apr 26th, 2017, 21:04	#4
P505DEF Master Member Last Online: Yesterday 17:02 Join Date: Apr 2014 Location: Stroud	Sorry should have made it a bit clearer, the car had no communication with the ABS module via Vida, so the car was tricking itself into not being fitted, being as the speedo is driven through the abs sensors and the sensors therefore had no power due to the pump control unit not working

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