1998 C70 Coupe, ABS DTC Topic is solved

Post by **RickHaleParker** » 06 Aug 2015, 09:01

Replace senors or is there something else I should look into first?

ABS-312 Right Front wheel sensor signal, fault in circuit
ABS-313 Left Rear wheel sensor signal, fault in circuit
ABS-314 Right Rear wheel sensor signal, fault in circuit

Scholz · Post by **Scholz** » 06 Aug 2015, 10:13

The ABS module itself is usually the culprit. Common failure point. I've personally seen it on two vehicles but it always manifested as right rear wheel sensor and pump DTCs for me. Weak factory soldering is the issue. Can DIY repair or do what I've done and gotten a rebuilt module.

Post by **Matty Moo** » 06 Aug 2015, 10:49

With a faulty module you are generally going to have a faulty reading or extrapolation code in addition to each circuit fault code. You typically won't have a bunch of opens like that by themselves UNLESS the codes were cleared from the module before. Test the circuits through the harness to confirm if the are open circuits or not.

Post by **RickHaleParker** » 06 Aug 2015, 11:28

It looks like my first attempt to repair should be to pull the ABS module, grab my heat gun and do a solder reflow.

Now to find the time to Git-R-Done.

goldmandan · Post by **goldmandan** » 06 Aug 2015, 15:58

I have a good working ABS module lying around off a '99 C70 if you need one. Hit me up [email protected] I'll let you have it for $50 shipped

Dan

Post by **RickHaleParker** » 07 Aug 2015, 17:33

'99 - '00 module is not the same as '96 - '98 ... They changed the OBD communication in '99

Post by **abscate** » 08 Aug 2015, 06:18

You can check sensors by looking for about 1000 ohms resistance on the plug without removing them

The success of people re soldering them and getting more than 6 months seems to be about 20%.

Mattymoo at Midwest ABS here sells tested recon units.

Post by **RickHaleParker** » 03 Dec 2015, 14:09

I replaced the ABS module with a remanufactured unit, problem solved.