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Old 09-27-2018, 10:30 PM   #1
lowkeychris
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Location: Nashville, TN
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replaced VSS, still no speedo

I just picked up a 1991 Accord sedan. I knew when i bought it that the speedo didn't work. I assumed before any research that it would need a new VSS so I got one. Driving it home I got the flashing S light and check engine light also. Freaked out but checked the codes using the jumper method under the dash and both checked out for a #4 and #17 codes, both for VSS. Cool... so I replace the VSS with absolute no improvement to anything. I also noticed the trans doesn't shift until about 3500 rpms. The guy I bought it from said the engine and trans were a factory non vtech JDM swap and he figured that had something to do with it but didnt ever care to fix it. So.... my next step was going to be a new TCM but I'm wondering if the factory PX4-822 is what I should get or do I need a Japan market TCM? Should I check the solenoids also? Thanks for your time. Have a good one!
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Old 09-28-2018, 10:13 PM   #2
fleetw00d
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The transmission issue may be because of the lack of a VSS signal. I'm assuming the drive key was in there between the power steering VSS and the electrical VSS. Trace the wires and verify whether you're getting power to the sensor and that you're getting an alternating signal out of it and back to the dash and ECM. Check to make sure you have a good ground on the bottom of the thermostat housing.
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Old 09-30-2018, 09:04 PM   #3
lowkeychris
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Quote:
Originally Posted by fleetw00d View Post
The transmission issue may be because of the lack of a VSS signal. I'm assuming the drive key was in there between the power steering VSS and the electrical VSS. Trace the wires and verify whether you're getting power to the sensor and that you're getting an alternating signal out of it and back to the dash and ECM. Check to make sure you have a good ground on the bottom of the thermostat housing.
Thanks, I will check that out tomorrow.
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