If they send it back without fixing it this will be the sixth unsucessful attempt to repair the same problem. Then clear the trouble codes and test drive. Is the voltage within the range specified in the value s column? C0035 5A-C0050 5A Difference between fastest and slowest wheel speed is greater than 50% for 30 s. The truck has been in a dealers shop 7 times for this problem. The older guy they call out when no one else can fix the problem. Is the resistance within the range specified in the value s column? Test drive the vehicle over various road surfaces bumps, turns, etc.
The only thing that will give them is an error code, and they already have the code from OnStar. If they send it back without fixing it this will be the sixth unsucessful attempt to repair the same problem. Perhaps a regional repair center with a couple of guru guys there and wiz-bang test equipment to find these problems. And a technician assigned to fix a problem like this should be given wide latitude to do what needs to be done. OnStar has sent the results of the remote diagnostics to the dealers several times, I have even gived the dealers the OnStar case number.
So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. They may only give the technician a certain amount of time to fix a problem like an hour. The encoder ring consists of permanent magnets. It can get magnetized and as Jaytee said then collect debris between the marks so the sensor doesn't have the brakes between to accurately calculate. Thanks a lot to all of you for your replies. I can't understand why it is so important for the dealer to be able to duplicate the problem.
Refer to Repair Procedures Cell 5 in Electrical Diagnosis. Right rear wheel speed sensor circuit. ©, 2015 Rick Muscoplat eautorepair. Might suggest they look at other electronic service industries as a model. The following table contains resistance values for the rear wheel speed sensors at varying sensor temperatures for use in diagnosis. If an open or high resistance is found in the jumper harness, replace the jumper harness. Since these trouble codes where triggered during the smog check and smog check machine failure we can assume the trouble codes were temporary and not related to any physical problem with your Mini Cooper.
Then file a lemon law suit. However, also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. This condition is normal when the vehicle loses signal from a wheel speed sensor. So might launch a letter writing campaign. I've been assigned problems like this in the non-automotive world before. So I think the automotive world needs something like this.
None of the 3 dealers that have worked on the truck for this problem can duplicate the problem. Refer to Repair Procedures Cell 5 in Electrical Diagnosis. Plus, they contain full trouble code descriptions and troubleshooting instructions. T the vehicle has high milage and is not covered by warrenty anymre. Double checked pin numbers, backprobe security and that scope was working. If a short to voltage is found in the jumper harness, replace the jumper harness.
We use data about you for a number of purposes explained in the links below. Most of the time they tell me that there is no error code stored in the computer. The only thing that will give them is an error code, and they already have the code from OnStar. The only other thing I can think is there is a dead short in the wiring or sensor that is pulling the voltage down to nothing thinking about it, the voltage supplied to the sensor must be extremely low current so as not to blow the sensor. Utah's lemon law only requires four unsucessful attempts to repair the same problem before they have to buy it back. It is their protocol that they don't replace the sensor only. Is the resistance within the range specified in the value s column? And also it is the leeway given to the technicians by their employer.
If the circuit tests normal, replace the K17 Electronic Brake Control Module. Basically you can attach monitoring equipment which monitors a signal and this will catch intermittent electrical problems. In some severe cases, you may have to remove the wheel bearing to remove all the debris. Book time for a job like that is only. Inspect all connectors and harnesses for damage that may result in an open or high resistance when connected. Any ideas what to look at next? Can't it be possible to just fix or replace the wheel speed sensor on this vehicle? I had one of the dealers look up the part numbers for the rear wheel speed sensors, they are the same part number for the left and right sensor.
I also did some research during the weekend. The only thing you can clear with a scantool is history codes. If the technician goes over that time, he is in big trouble! If the codes are still present and the ring is clean, proceed with normal diagnostic procedures. Backprobed pins for left rear sensor and got no voltage at all. Now, instead of a steel tone ring, it is a rubberized ring with magnetic North and South poles molded into the nitrile rubber like a magnetic business card. Then this will record what is going on with the circuit. How can I get the dealer to replace parts to try and actually fix the problem? Give each wire a tug at the connector to see if one is broken, then inspect the harness where it flexes the most, pulling on each wire again.
Wipe it off with a dry nylon bristle brush. I went to Autozone and talked to one of the sales person. I was able to get code to clear for a short time, but it reappeared soon after test drive. They will send out a guy with a handset a few times, then they escalate it and an older more experienced guy shows up with all sorts of fancy test equipment. The 2nd or 3rd time the product is returned or the customer calls in for service for the same problem , it is automatically escalated, then fixed. Should the check engine light return in the near future for the same trouble codes P1774 and P1775 we'd recommend inspecting the rear wheel speed sensors for possible debris build-up.