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Old 03-16-2022, 06:58 AM   #1
bstrap1
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Member#: 498131
Join Date: Feb 2019
Default Hill Assist, VDC, ABS lights on - not BLS?

I have an issue where the ABS, Hill Asist and VDC lights are all on at startup without pressing the brakes. No engine codes.

I have previously replaced the brake light switch due to an intermittent issue with these lights coming on. I have confirmed operation of the BLS by 1. Seeing the brake lights come on while pushing the brake. 2. no issue with taking the car out of park. 3. multimeter testing for continuity of the switch on/off.

I had a mouse chew through one of my fuel lines above my fuel tank and had to replace a section of hose which was a pretty big pain. I did not have the lights all on the dash before this was fixed...

Is it possible the BLS is still bad even though it appears to be functioning? If the mouse did chew a wire is there any places I can check using the pinouts on the ecu or abs module? Any other things to check before trying to trace wires?
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Old 03-16-2022, 09:33 AM   #2
Elbert Bass
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Join Date: May 2011
Chapter/Region: South East
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2016 Fuji Sunfire 03
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There are two sets of contacts in the BLS but the VDC only monitors the contacts for brake lights - the other set is for cruise control.
Could be anything.
Ideally you need to scan for codes in the VDC - with a scan tool capable of communicating with VDC.
Did you adjust the BLS properly? https://static.nhtsa.gov/odi/rcl/201...9V149-9018.pdf
Have you recently installed LED brake lamps? Take them out.
Have you recently removed the steering wheel or disconnected the steering rack from the steering column? You may have gotten the SAS too far off zero.
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Old 03-16-2022, 10:45 PM   #3
bstrap1
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Default

Thanks for the tips. I was swapping my winter wheels for my summer wheels today and used the time to inspect the wheel speed sensors. One of them was chewed through at the connector. I have a replacement ordered that will hopefully fix my issues. Mice are bastards...
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Old 03-18-2022, 09:29 AM   #4
Elbert Bass
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Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
Vehicle:
2016 Fuji Sunfire 03
Silver

Default

Quote:
Originally Posted by bstrap1 View Post
Thanks for the tips. I was swapping my winter wheels for my summer wheels today and used the time to inspect the wheel speed sensors. One of them was chewed through at the connector. I have a replacement ordered that will hopefully fix my issues. Mice are bastards...
Sounds like you found the problem, that will do it.
Blame Subaru. They have been using wiring whose insulation contains food by-products (soy, peanut, rice...).
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Old 03-20-2022, 07:43 AM   #5
bstrap1
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So I replaced the wheel speed sensor easily enough. Still have my abs, hill assist and vdc lights on... Is there a way to reset the abs/vdc module besides just pulling the negative battery cable for a bit?

Still very possible to have a bad wire somewhere else sadly. May have to buy a abs code scanner.
I'm might actually be missing the old days of troubleshooting electrical issues of my rx7...
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Old 03-20-2022, 09:25 AM   #6
Elbert Bass
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Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
Vehicle:
2016 Fuji Sunfire 03
Silver

Default

Quote:
Originally Posted by bstrap1 View Post
So I replaced the wheel speed sensor easily enough. Still have my abs, hill assist and vdc lights on... Is there a way to reset the abs/vdc module besides just pulling the negative battery cable for a bit?

Still very possible to have a bad wire somewhere else sadly. May have to buy a abs code scanner.
I'm might actually be missing the old days of troubleshooting electrical issues of my rx7...
Yup. I would inspect all wheel speed sensor harnesses, There are a couple impact sensors up front on the radiator support - check wires there (should have those funny yellow plugs), as well as the VDC harness tail under hood an the the main harness under hood. Locations depend on year/model.

BTW: don't use an ohmmeter to test from VDC control module - an ohmmeter can set off the air bags. Subaru has a bunch of dummy loads you plug in place of the air bags before you do any testing.
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