Been through most of the ABS threads trying to find answers, Help needed.
Read ABS codes using the dashboard lights,
ABS Codes 14, 21, 22, 23, 24, 25, 26. Only info I can find is sensors abnormal. After changing rear left sensor, 14 disappeared.
Checked all vacuum pipes and relays to 4wd solenoids and cleaned the switch in the transfer box.
Checked sensors at connector to ABS pump all showing resistance in spec (1.25kohm to 1.32 kohm).
Changed abs pump (second hand), switched on ignition and all checks fine. (Assumed no fault codes at this point as ABS light went on and off as normal when no faults) Drove truck up road. ABS light came on 21, 22, 23, 24, all reappeared. Rechecked resistance still (1.25kohm to 1.32 kohm). Put truck in air, ran in 4wd and checked ac voltage at abs pump connector terminals, all sensors showing an ac voltage reading. Thought I would run without sensors connected. Fault codes changed to 11, 12, 13, 14. Rechecked resistance at each sensor all OK.
Installed new battery just in case. ABS light still on. Doesn't go on and off at all just straight to light.
I am assuming there is little chance of all the rotors failing at the same time, so I am concentrating on something electronic.
Reconnected old ABS pump and Codes 14, 21, 22, 23, 24, 25, 26 all reappeared.
I am assuming both ABS pumps are goosed unless anyone can advise any other checks. Cheers
Forgot to ask, is it possible to delete codes without MUT 11 scanner?? Tried disconnecting battery didn't work.
have you got this issue sorted yet. Iv'e had a guy here today to plug his snap-on reader into mine to see if any faults for abs light staying on.
Problem as reader would not connect and he said it must be the abs control unit as all sensors have been tested and reading 12v.
Fuse is ok and iv'e checked it for corrosion but it was clean.
Any thoughts why it would not connect anyone.
I've tried Delphi, Eclipse, and WOW software, none of which will connect to ABS module. I have opportunity later this week to try Snapon Solus Pro, but I believe it needs a seperate cable for the K74. Will update when I have tried. As a foot note all the other software programs can connect to the Engine ecu, read and clear DTC's, activate odd things like A/C relays, reads some live outputs eg Crank Shaft Sensors etc. Wow software also has a fantastic library of information on the L200 although you have to select OBD11 connection, to get it to work as it is really eOBD software. I am now looking to inspect all wiring between ecu's, if the Solus Pro does not connect. All my sensors are within the resistance limits 1.25 to 1.39 and are showing an AC voltage (VAC in mVolts not 12v) when the wheels are turning. Keep in touch if you find a solution.
Anyone out there give me a heads up on what the Combination meter does. It appears to provide the supply to the ABS Relay pin 3. I have changed the relay but there does't appear to be any signal from the ABS ecu to operate the ABS relay(NC), and the ABS light is staying on. I am leaning towards an ABS ecu problem, all help will gratefully received.