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https://www.autonerdz.com/cgi/yabb2/YaBB.pl General Public Area >> PicoScope >> 2008 Chevrolet Optra ABS https://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1299435695 Message started by shay1 on Mar 6^th, 2011 at 10:21am

Title: 2008 Chevrolet Optra ABS
Post by shay1 on Mar 6^th, 2011 at 10:21am

Hi
I have problem with 2008 Chevrolet Optra\Nubira: One per month this car come to my garage with DTC C0035 (Left Front Wheel Speed Sensor Circuit).
I change:
1.LF Speed Sensor
2. I change wiring from WSS to ABS module
3.EBCM module
OEM parts.
I check:
1.LF WSS waveforms (look good Like the other) no RF
2.RR WSS check with the scan tool look good.
3. check all tire profile and tire pressure look good.
4. I drive with scan tool (tech 2) and look on 4 WSS PID look good.
Is someone have same idea :-? :-?

Thanks
shay

Title: Re: 2008 Chevrolet Optra ABS
Post by crackerclicker on Mar 6^th, 2011 at 12:31pm

are these cars subject to rust jacking? check where the sensor mounts. if rust has built up under the mounting point, clean it and retest.

Title: Re: 2008 Chevrolet Optra ABS
Post by Dave_Hill on Mar 6^th, 2011 at 1:50pm

Maybe an idea to swap the wiring from the NSF & OSF wheel speed sensors over & see if the fault follows the sensor or remains with the controller.

A road test with Pico connected to each front sensor might reveal something too. I have no knowledge of this vehicle, but if it is an old style analogue (passive) sensor, then I wouldn't rely on spinning the wheel by hand, to make a judgement.

Can you post some waveforms?

Title: Re: 2008 Chevrolet Optra ABS
Post by shay1 on Mar 7^th, 2011 at 9:02am

I try to upload waveforms next week.

Thanks
shay