Subaru - Outback :: 2001 - Radio / Power Steering And Engine Cut Out While Driving
Jul 21, 2016
A new issue has cropped up with my 2001 H6 Subaru Outback (which I believe is technically a Legacy). We've put so much work into this thing to keep it running and this might be the last nail in the coffin. However, what's going on...
My wife reported to me yesterday that the vehicle was turning itself off while driving. I was not in the car to verify any of this, so this part is anecdotal. After 45 minutes of driving, she said the engine was "hiccuping" and the gages were dropping to zero and then bringing themselves right back up to the current RPM and speed. She said the ABS light came on. The first time the vehicle did this, she reports that it did it many times in rapid succession. She described it as "the gages were going crazy". After turning around to come back home this happened once more, though not in rapid succession. It was a single occurrence of turning off and back on again. She indicated that the vehicle did not require a restart with the key. I suspect that this was because she was driving at highway speed at the time.
She brought it right to the mechanic and - as is the case with all intermittent issues - they were not able to repeat the failure in any way. So, being an engineer, I decided I wanted to experience it for myself and do a few tests.
Today I drove 45 minutes to work, 10 minutes of small town driving, 25 minutes of highway driving, 10 minutes of small town driving. Lucky for me (!), in the first five minutes of driving, the radio cut out, power steering died, and I heard fuses or relays clicking as I was gently braking and gently taking a right turn. I continued the right turn off into a parking spot on the side of the road and stopped the car. I turned the key to the off position, put it into park and restarted the vehicle right away. No problems. All was fine.
The vehicle did not do this again for the entire trip. However, I did perform some tests to see if I could repeat a similar failure with the ignition alone.
1) Turning the ignition off and quickly back on again by hand while rolling at highway speed (~55 mph) will cause the vehicle to kick back into a normal running mode.
2) Turning the ignition off and quickly back on again by hand while rolling at lower speed (~30 mph) will require a restart by turning the key all the way to the "start" position and not just the "on" position.
3) Turning the ignition off with the key (as in 1 and 2) DOES NOT cut out the radio. Note that when the intermittent defect occurs, the radio will cut out and then come back along with the engine and instrument panel.
4) Wiggling and stressing the keys to put strain on the ignition switch doesn't seem to cause anything to happen.
5) The battery is only a few months old and a general inspection of the battery terminals, cabling, and fuses indicates that everything appears to be in tact and clean.
I'm not the most experienced car person, so my terminology is probably a little off and that's all I have for now. I feel like this is a common ground issue and if I could only identify which ground services the instrument panel and radio and spark plugs I could inspect it and clean or replace a connection. My limited research reveals that there are many grounds throughout the engine compartment, though.
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