ABS Diagnostics

Mike Noc · 31st March 2016, 23:54

Had an OSF caliper seize a couple of weeks back. Stripped and cleaned it out and everything worked fine until three days ago.

Driving up the M1 and the ABS alarm came on for ten minutes then went off again. Didn't reappear and 400 miles later I got back home today, so connected the ACR4 diagnostic up and got two fault codes stored for the ABS:

005 wheel speed sensor rear right plausibility.

006 wheel speed sensor front right plausibility (brake).

When the brake caliper seized the ABS didn't alarm up, but strange that the brake was specifically mentioned in the second stored fault code - coincidence or can the system detect a dragging brake?

Have cleared both fault codes and will see what, if anything flags up again.

Phil-T4 · 1st April 2016, 00:31

Hard to say as the description text varies on different diagnostic machines, however on the T4 it will tell you if the fault was logged during braking.

Mike Noc · 1st April 2016, 07:19

Thanks Phil, that sounds the most likely explanation.

31st March 2016, 23:54	#1
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,551 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	ABS Diagnostics Had an OSF caliper seize a couple of weeks back. Stripped and cleaned it out and everything worked fine until three days ago. Driving up the M1 and the ABS alarm came on for ten minutes then went off again. Didn't reappear and 400 miles later I got back home today, so connected the ACR4 diagnostic up and got two fault codes stored for the ABS: 005 wheel speed sensor rear right plausibility. 006 wheel speed sensor front right plausibility (brake). When the brake caliper seized the ABS didn't alarm up, but strange that the brake was specifically mentioned in the second stored fault code - coincidence or can the system detect a dragging brake? Have cleared both fault codes and will see what, if anything flags up again.

1st April 2016, 00:31	#2
Phil-T4 I really should get out more....... MG ZT-T, Rover 75 Tourer Join Date: Mar 2011 Location: Olney Posts: 2,969 Thanks: 245 Thanked 1,088 Times in 657 Posts	Hard to say as the description text varies on different diagnostic machines, however on the T4 it will tell you if the fault was logged during braking.

1st April 2016, 07:19	#3
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,551 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Thanks Phil, that sounds the most likely explanation.