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Old 02-16-2014, 10:45 AM   #1 (permalink)
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Default ABS problem diagnosis

I have the following ABS codes on a 2005 Epica:
C1202 - Left Front Wheel Speed Sensor No Signal
C1612 -CAN Bus Circuit Malfunction- ECM to ABS Control Unit
C1208 Left Rear Wheel Speed Sensor No Signal
C1211 Right Rear Wheel Speed Sensor No Signal

All wiring and connections look clean and secure. Reseated the ABS module and cleaned up ground connection. I am getting 19.9V on left front leads and the sensor reads 1000 ohms when not moving the wheel. Is this likely left front sensor or a module failure? Also, does the dash ABS light go out as soon as the problem is fixed or does it need to be done with a scanner?

Any thoughts/help would be appreciated.
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Old 02-19-2014, 01:59 PM   #2 (permalink)
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Can someone verify that the left front wheel speed sensor also acts as VSS and therefore, will set CEL if it fails?
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Old 02-20-2014, 10:33 PM   #3 (permalink)
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It's been a while since I had a subscription to the Verona service manual, but I seem to recall that the Front Left ABS sensor does act as the VSS, because my car DOESN'T have ABS, but when I replaced the wheel hub I needed to get 1 for a car with ABS due to the sensor, and it made perfect sense at the time.
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Old 02-22-2014, 12:28 PM   #4 (permalink)
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Thanks, that is really helpful information. I am going to replace the right front bearing with abs sensor and see if that resolves the issues.
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Old 02-27-2014, 12:30 AM   #5 (permalink)
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Quote:
Originally Posted by klaas2010 View Post
I have the following ABS codes on a 2005 Epica:
C1202 - Left Front Wheel Speed Sensor No Signal
C1612 -CAN Bus Circuit Malfunction- ECM to ABS Control Unit
C1208 Left Rear Wheel Speed Sensor No Signal
C1211 Right Rear Wheel Speed Sensor No Signal

All wiring and connections look clean and secure. Reseated the ABS module and cleaned up ground connection. I am getting 19.9V on left front leads and the sensor reads 1000 ohms when not moving the wheel. Is this likely left front sensor or a module failure? Also, does the dash ABS light go out as soon as the problem is fixed or does it need to be done with a scanner?

Any thoughts/help would be appreciated.
What Scanner model and make did you use to get the codes? because I am trying MAXISCAN and not getting any codes at all but my ABS and TC light is still ON.
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