Announcement

Collapse
No announcement yet.

Audi CQ20V ABS problem

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #76
    Hello Tom!
    You have solved the problem with the ABS?

    Comment


    • #77
      Hi, not yet because i dont drive car during winter (building engine), but when will be more warmer, i want to measure with osciloscope
      Audi Coupe Quattro 2.3 20V

      Comment


      • #78
        What good ABS relay suppose to have an resitance? The bigger one 4 pin have 44,5 Ohms and the small ones 5 pin have 81,5... What about relay under the dashboard? Fuse looks good. How much ohms is good for the ground on our cars?I checked ABS pump ground and it was around 3,0+- Ohms...



        This abs problem is ****ing bother me...never ending story...
        Last edited by Tom_; 21 June 2018, 18:34.
        Audi Coupe Quattro 2.3 20V

        Comment


        • #79
          shorty_94 M2ki dissasembly the ABS ECU connector and measure abs wires through body...On paper you can see pictures. I put away ABS relay and take there wire and ABS comes ON after few seconds after engine was started. But when i wiggle with that wire, ABS OFF and than after few seconds comes ON again...co i guess that relay is good.

          And when the ABS comes ON, i can turn him off with ABS button on dashboard, so the button is good too i thought. But i cant turn ABS ON with abs button, when the wire was connected instead of abs relay



          Any ideas guys?
          Last edited by Tom_; 23 June 2018, 13:50.
          Audi Coupe Quattro 2.3 20V

          Comment


          • #80
            Button and lock switch on rear diff is connected to abs combi relay nr. 76
            1989 Audi 80 Quattro
            1994 Audi 80 Quattro Competition

            Comment


            • #81
              Ok, so relay seems to be good..ABS ecu as well.

              piotr Any ideas ? I am desperate
              Last edited by Tom_; 24 June 2018, 21:40.
              Audi Coupe Quattro 2.3 20V

              Comment


              • #82
                Before a while i measure AC voltage on abs sensors with moving the wheel...I also check battery which have 12.8 Volts. Next i fill up the servo reservoir.. Brake lights is good...every fuse check with multimeter with a beep

                FDriver front 0,71
                Codriver front 0, 75
                Driver rear 0,67
                Codriver rear 1,1

                Guys, what next?
                Audi Coupe Quattro 2.3 20V

                Comment


                • #83
                  Did you already check the sensor voltages with an oscilloscope?
                  '95 Audi S2 Avant
                  '92 Audi Coupe T89 quattro 2.3E

                  Comment


                  • #84
                    Not yet ..i think that problem will be in different place because when i start engine on idle for around 15 seconds, than ABS goes off and shows on gauge...
                    Audi Coupe Quattro 2.3 20V

                    Comment


                    • #85
                      ABS light turns on even when relay nr. 76 is briged with a wire, when stationary and idling?
                      1989 Audi 80 Quattro
                      1994 Audi 80 Quattro Competition

                      Comment


                      • #86
                        M2ki Yes, exactly...when is briged with wire and idling. :/
                        Last edited by Tom_; 26 June 2018, 13:21.
                        Audi Coupe Quattro 2.3 20V

                        Comment


                        • #87
                          Then you can eliminate faults at relay 76, abs switch, diff lock swicth and switch on the rear diff.
                          Maybe you have already measured wheel sensors ohms from the abs ecu connector, if they are similar, then probably no fault with sensors and sensors wiring.
                          Dont think the wiring inside the car is faulty.

                          You can bridge the pump relay to find out if the pump even works.
                          1989 Audi 80 Quattro
                          1994 Audi 80 Quattro Competition

                          Comment


                          • #88
                            M2ki Now i can eliminate ABS ECU, because i try my friends ABS ECU and problem is still there... I can eliminate ABS pump relays too, i try from the friends car and problem is still :/

                            I have already measured wheel sensors ohms from the abs ecu connector..

                            8-9 pin 1,181 ohms
                            11-21pin 1,258 ohms
                            26-24 1,173 ohms
                            22-4 1,193 ohms

                            U mean those relays inside abs pump?
                            Last edited by Tom_; 26 June 2018, 21:29.
                            Audi Coupe Quattro 2.3 20V

                            Comment


                            • #89
                              Yes inside the pump, one is for solenoids, other is for return pump.

                              If possible try your relays and ecu on your friends car also.
                              1989 Audi 80 Quattro
                              1994 Audi 80 Quattro Competition

                              Comment


                              • #90
                                M2ki Which pins to bridge inside the pump?
                                Audi Coupe Quattro 2.3 20V

                                Comment

                                Working...
                                X