Thread: Front Left Sensor Electrical Failure

Front left sensor has an open circuit most likely, intermittent. I would however first check the hub/wheel brg for failure, if ok then replace sensor. I would recommend fitting the long lead all the way back to the ecu as the failure is sometimes in the actual harness where it passes through the bulkhead. Jc

Originally Posted by justinc

Front left sensor has an open circuit most likely, intermittent. I would however first check the hub/wheel brg for failure, if ok then replace sensor. I would recommend fitting the long lead all the way back to the ecu as the failure is sometimes in the actual harness where it passes through the bulkhead. Jc

Thanks JC. I will check that.

You can use a multimeter set on resistance and measure in the sensor's plug... it must be between 950-1100Ohm, if it's out of that range you need new sensor, if it is within range suspend that side and set tool on AC voltage 5V scale then man up and turn the wheel as fast as you can... you must get a growing voltage reading dependent on rotation, the fastest it spins the more volts you must see, but don't expect very much as the ECU makes calculations based on frequency not voltage...if this test faild get a new hub

or if you have tester read live data inputs from the sensor...it must be quite stabile without "jumps" and growing together with speed.