ASR was a slip reduction technology that worked with rear wheels. ESP uses a yaw sensor as well as steering angle inputs. Cobblestone; wet. With ESP on, little drama. With ESP off, car spun off every time.
ESP will apply brakes to individual wheels during a slide, therefore bringing the vehicle back under control with little or no steering input. Originally Posted by krautwagen BB code is On. Smilies are On. Trackbacks are On. Pingbacks are On. Refbacks are On. Would you trust a firestone to replace wheel sensors and the magnet on each wheel. Lastly, will the warning lights on the dash go off. New bat in, did the wheel turn thing several times, light still comes on about 30 sec after starting down the road.??
This is great help. My e wagon was rear ended, and this makes sense. I will fix it now. Thanks a lot! Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Yes, add me to your mailing list. Go to top. EmmettJones September 9, at am. Mercedes Medic October 23, at am. Mercedes Medic March 7, at pm. Michael January 10, at pm.
Leave a Reply Cancel reply Your email address will not be published. Something else was causing the car to go into limp mode intermittently. Diagnosis becomes difficult when more than one control module is involved in a system, or shares data with several others.
Starting with the powers and grounds at the control unit connector, he said all were OK. The tech went through the electrical test procedure he had on his shop info system. The resistances on the solenoid valves in the hydraulic unit and wheel speed sensors were OK, the wheel speed sensors all produced a good signal, and the voltage comparison from side to side on each axle was OK when rotating the wheels at a steady speed. At that time the MIL was off and the car was working normally, increasing his frustration factor.
I asked the tech to retest the power feed at the control module from the over-voltage protection relay OVPR. I explained that we needed to see less than 0. The reading was Battery voltage at the fuse box was I suggested he drive the car until it went into limp mode, and then come back to the shop, switch off and recheck his Key On, Engine Off volt drop.
He found the voltage from the OVPR was dropping to 9. While the relay was not completely failing, high internal contact resistance in the relay was causing the control unit to quit working due to lack of voltage. This illustrates the help that self-diagnostics can provide when testing complex interactive systems.
When performing test procedures by the book—go by the book. Wheel End: 4X4 Locking Hubs. Digital Edition. Contact Us.
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