Just out of interest are the rear ABS sensors the same as those used on late model Sierras & later Scorpio.
Can't seam to find anyone who stocks them, wouldn't mind the part numbers.
Rear ABS Sensors
Moderators: Garry Bottomley, Kevin
Re: Rear ABS Sensors
After much work and now recently passed C+G Level 3 diploma in Light Vehicle Maintenance & Repair the fault with my ABS was really easy to rectify.
As the course touched upon brake ABS systems i had to diagnose faults on a vehicle with a similar issue to my own. The type of ABS system used on the Granada is PASSIVE and therefore sensors generate their own power (A.C).
Having checked the sensors for resistance on all four wheels it was ready to check for voltage, the fault was due to the NSR sensor not generating any A.C power which could also be the reluctor ring.
However as the vehicle is 30+ years old i have now ordered a brand new pair of rear sensors as i replaced the fronts earlier on this year.
The only other issue is the brake pad wear light...continually on despite both front and rear pads are new and i could really do with a wiring diagram.
Having been unable to find a college offering Level 4 in Light Vehicle Maintenance & Repair I'm now enrolled to take IMI Level 4 Hybrid & EV instead.
A minimum of Level 3 is required to take the EV course...may as well have it as it looks good on the CV.
As the course touched upon brake ABS systems i had to diagnose faults on a vehicle with a similar issue to my own. The type of ABS system used on the Granada is PASSIVE and therefore sensors generate their own power (A.C).
Having checked the sensors for resistance on all four wheels it was ready to check for voltage, the fault was due to the NSR sensor not generating any A.C power which could also be the reluctor ring.
However as the vehicle is 30+ years old i have now ordered a brand new pair of rear sensors as i replaced the fronts earlier on this year.
The only other issue is the brake pad wear light...continually on despite both front and rear pads are new and i could really do with a wiring diagram.
Having been unable to find a college offering Level 4 in Light Vehicle Maintenance & Repair I'm now enrolled to take IMI Level 4 Hybrid & EV instead.
A minimum of Level 3 is required to take the EV course...may as well have it as it looks good on the CV.
Re: Rear ABS Sensors
Having had no response to my issue on various forums i decided to remove the rear sensor and find out if it would just clean up then work again.
Upon removal the mounting point on the sensor was badly corroded and fell apart (not to the extent where it wouldn't actually go back on temporary).
The pick-up face of the sensor had rather a lot of iron filings and was carefully removed then with a torch i focused on cleaning up the reluctor ring. With a small flat bladed screwdriver i scraped in between every grove of the ring, both the sensor and road wheel were replaced and i then tested the sensor for an AC output. Only with everything put back in place the sensor finally did give an AC voltage and was quite surprised.
It was at this point it was decided to go for a short drive and the ABS light stayed on, i then stopped for a few minutes and turned off the ignition then driven back thinking it would correct itself. The light remains on suggesting the fault lies with something else.
As soon as the later Scorpio ABS sensors arrive i will check the spec on them and if they are not compatible will as i say be returned, the only other way i can assume is to get a pair of rear Sierra ABS sensors and change the plugs...cant find new rear sensors for a Granada anywhere.
Upon removal the mounting point on the sensor was badly corroded and fell apart (not to the extent where it wouldn't actually go back on temporary).
The pick-up face of the sensor had rather a lot of iron filings and was carefully removed then with a torch i focused on cleaning up the reluctor ring. With a small flat bladed screwdriver i scraped in between every grove of the ring, both the sensor and road wheel were replaced and i then tested the sensor for an AC output. Only with everything put back in place the sensor finally did give an AC voltage and was quite surprised.
It was at this point it was decided to go for a short drive and the ABS light stayed on, i then stopped for a few minutes and turned off the ignition then driven back thinking it would correct itself. The light remains on suggesting the fault lies with something else.
As soon as the later Scorpio ABS sensors arrive i will check the spec on them and if they are not compatible will as i say be returned, the only other way i can assume is to get a pair of rear Sierra ABS sensors and change the plugs...cant find new rear sensors for a Granada anywhere.
Re: Rear ABS Sensors
Having still not had any response with my issue I continued and have now changed both rear sensors and the light still refuses to go out, this suggests that the later Scorpio sensors are not compatible with the earlier Granada's ABS system.
Both new Scorpio sensors do give resistance but don't return any AC voltage which would indicate they are Hall Effect and generate DC voltage (haven't tried them for for DC V yet as i'm fuck't off with the cunt).
The original Granada rear sensors are manufactured by ATE part number: 92GB 2B372 BA
Scorpio ATE part number: 95GB 2B372 BB
Both new Scorpio sensors do give resistance but don't return any AC voltage which would indicate they are Hall Effect and generate DC voltage (haven't tried them for for DC V yet as i'm fuck't off with the cunt).
The original Granada rear sensors are manufactured by ATE part number: 92GB 2B372 BA
Scorpio ATE part number: 95GB 2B372 BB
Re: Rear ABS Sensors
Removed the plug from the ABS ECM (located above the ECU ) and checked for continuity between all 4 sensors and ABS ECM. There was resistance thus proving continuity:
Resistance:
1. 1136 OHMS
2. 1141 OHMS
3. 1063 OHMS
4. 1078 OHMS
*ALL RECORDINGS TAKEN AT STANDSTILL*
With the resistance figures i then went out for a test drive to test the AC voltage from all 4 sensors:
1. 03.2 ACV
2. 00.9 ACV
3. 05.3 ACV
4. 03.4 ACV
*ALL AC VOLTAGES TAKEN DRIVING AT 30MPH*
Resistance:
1. 1136 OHMS
2. 1141 OHMS
3. 1063 OHMS
4. 1078 OHMS
*ALL RECORDINGS TAKEN AT STANDSTILL*
With the resistance figures i then went out for a test drive to test the AC voltage from all 4 sensors:
1. 03.2 ACV
2. 00.9 ACV
3. 05.3 ACV
4. 03.4 ACV
*ALL AC VOLTAGES TAKEN DRIVING AT 30MPH*
Re: Rear ABS Sensors
All of the 30A ABS fuses within the main fuse box test o.k (32,36 & 37)
Re: Rear ABS Sensors
Having convinced myself at point no help was available i continued, re-connected the ABS ECM however, upon doing so i heard a click from the relay that controls the ABS ECM. I thought great its possibly a bad connection so i then disconnected the ECM and checked the pins, with some fine sandpaper i cleaned all the pins and applied some dielectric grease to the contacts. Switched on the ignition and the ABS light was distinguished (didn't hear the pump prime though). As far as i remember upon switch on all the dash warning lights should illuminate (self test) and then go out except for the ABS light which didn't even come on at all...could the ABS ECM be buggered.
Don't know where i go from here? Despite all the frustration i may have got the ABS light to go out but it still ain't working...went for a short drive stopped a few minutes and the ABS light still doesn't come on as part of the systems self test.
The only other issue is the brake pad wear light that refuses to go out...will the ABS work properly once this light goes out?
Don't know where i go from here? Despite all the frustration i may have got the ABS light to go out but it still ain't working...went for a short drive stopped a few minutes and the ABS light still doesn't come on as part of the systems self test.
The only other issue is the brake pad wear light that refuses to go out...will the ABS work properly once this light goes out?
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New Cossi Owner
- Posts: 48
- Joined: Thu Jan 30, 2014 12:33 am
- Location: Leeds, West Yorkshire
Re: Rear ABS Sensors
Hi c.a.p.r.i,
What a great post - very detailed (which I like!) although far beyond my scope of diagnostics - well done on - firstly, getting this far, and secondly on your passing your qualifications, every day is school day and I love continually learning (mostly I do it by using things, breaking them, and fixing them!)
Do you have the old forum from the shop? There a quite a few ABS related threads and loads more useful info on what peeps have done to fix/repair/modify their Granada's over the years. Well worth having , i would argue - hours and hours of reading material on our favorite motors.
Good look with this endeavor!
What a great post - very detailed (which I like!) although far beyond my scope of diagnostics - well done on - firstly, getting this far, and secondly on your passing your qualifications, every day is school day and I love continually learning (mostly I do it by using things, breaking them, and fixing them!)
Do you have the old forum from the shop? There a quite a few ABS related threads and loads more useful info on what peeps have done to fix/repair/modify their Granada's over the years. Well worth having , i would argue - hours and hours of reading material on our favorite motors.
Good look with this endeavor!
Re: Rear ABS Sensors
Just to make you aware that this has not resolved the problem and yes most would have given up and could never have contemplated to even come this far. I currently hold 15 A-Levels and problem solving requires a great deal a patience which is why its best to work alone...so many different combinations and only one key fits.
This type of diagnosing is well beyond the scope of a 'car mechanic' as many are pretty inept in terms of electric problem solving...they just haven't the aptitude and never will.
I'ts highly unlikely your ever going to see a true mechanic who can fully strip and recondition an engine competently and guarantee their work.
Back in 2021 the the previous Tory government announced that there is a shortage of Level 3 qualified workers and it's now currently free for anyone to get this accreditation no matter what trade. However, every college i tried only gave priority to those aged 16-19 which was most inconvenient, i really had to have this accreditation. In September 2023 i tried enrolling at Hopwood Hall College and got in straight away, the tutors taken one look at my old level 1&2 accreditation's and said NO PROBLEM. I knew i was going to walk it leading to...2X DISTINCTIONS 2X MERITS & 2X PASSES!
It was quite a strange experience going back to college for 9 months full time in a class of 15 kids and did test my patience on a few times although, the tutors did express on many occasions that the kids found it quite rewarding to have me help them out. I even beat them all at table football!!!
I just had to have that accreditation to my name and say i'm fully qualified in light vehicle maintenance and repair and smashed it!
As i headed home from college on went the stereo '3 drives Greece 2000' banging as i glanced through the rear mirror whilst heading out of the college gates...who wouldn't? the course cost £5,500 and all completely free!!!
It was June and the Granada had so many shows ahead and the compliments from bus drivers, police including the usual mong were most powerful. Yes today's cars are extremely bland and all share the same crappy mpv Eurobox shape. Even Ford fuck't up deciding to bring back the Capri...WHY BASE IT ON AN MPV SO IT LOOKS SHIT! Apparently the Capri was designed to be itself and not based on any other current sedans.
This type of diagnosing is well beyond the scope of a 'car mechanic' as many are pretty inept in terms of electric problem solving...they just haven't the aptitude and never will.
I'ts highly unlikely your ever going to see a true mechanic who can fully strip and recondition an engine competently and guarantee their work.
Back in 2021 the the previous Tory government announced that there is a shortage of Level 3 qualified workers and it's now currently free for anyone to get this accreditation no matter what trade. However, every college i tried only gave priority to those aged 16-19 which was most inconvenient, i really had to have this accreditation. In September 2023 i tried enrolling at Hopwood Hall College and got in straight away, the tutors taken one look at my old level 1&2 accreditation's and said NO PROBLEM. I knew i was going to walk it leading to...2X DISTINCTIONS 2X MERITS & 2X PASSES!
It was quite a strange experience going back to college for 9 months full time in a class of 15 kids and did test my patience on a few times although, the tutors did express on many occasions that the kids found it quite rewarding to have me help them out. I even beat them all at table football!!!
I just had to have that accreditation to my name and say i'm fully qualified in light vehicle maintenance and repair and smashed it!
As i headed home from college on went the stereo '3 drives Greece 2000' banging as i glanced through the rear mirror whilst heading out of the college gates...who wouldn't? the course cost £5,500 and all completely free!!!
It was June and the Granada had so many shows ahead and the compliments from bus drivers, police including the usual mong were most powerful. Yes today's cars are extremely bland and all share the same crappy mpv Eurobox shape. Even Ford fuck't up deciding to bring back the Capri...WHY BASE IT ON AN MPV SO IT LOOKS SHIT! Apparently the Capri was designed to be itself and not based on any other current sedans.
Re: Rear ABS Sensors
Back to the fault:
Went to remove the ABS ECM relay and it was warm suggesting that had been constantly on overnight, removed it from its socket and turned on the ignition to find out the ABS light was back on again. I then plugged it back in again switched on the ignition and the light still remained on then fired up the engine...still on.
Next to the ABS ECM relay is the ABS pump relay, i figured that if i close the contacts the pump will start and indeed it did (relay tested o.k).
Having established that the ABS pump is working is giving me a strong indication that the fault must be within the ABS ECM. Although it could be one of the pump multi-plugs...despite being a guessing game i must surely be getting fairly close to the fault now.
The use of a circuit diagram for the later Granada would have made diagnosis both quicker and much simpler.
Went to remove the ABS ECM relay and it was warm suggesting that had been constantly on overnight, removed it from its socket and turned on the ignition to find out the ABS light was back on again. I then plugged it back in again switched on the ignition and the light still remained on then fired up the engine...still on.
Next to the ABS ECM relay is the ABS pump relay, i figured that if i close the contacts the pump will start and indeed it did (relay tested o.k).
Having established that the ABS pump is working is giving me a strong indication that the fault must be within the ABS ECM. Although it could be one of the pump multi-plugs...despite being a guessing game i must surely be getting fairly close to the fault now.
The use of a circuit diagram for the later Granada would have made diagnosis both quicker and much simpler.
Re: Rear ABS Sensors
Having driven over to my garage i managed to pick up both of my Blue-Point Data Check fault code readers, i happen to have both the 100 & 200 models. Just need to locate the correct diagnostic socket for the ABS ECM as there are several sockets within the Granada's loom.