Hondata

Hello all,

Driving the car for 8 months using the pcs output with a relay to engage VTEC. after runing the car for 20 minutes vtec just stopped working. cleaned and inspected all the wiring, relay and solenoid and everything is fine.

hooked up my laptop and datalogged driving and the pcs indicator does not turn off which is what engages vtec. i can invert the output and the pcs indicator will turn off and in turn the vtec solenoid will click telling me that it works.

i can not figure out why it stopped working. everything is still setup for vtec to work but the pcs is not working, pcs stays on all the time regardless of what i change.

i dont know what else to do since the smanager is set as it always has been but not pcs is not turing off as it should.

any ideas on how to make it work again?

1997 Accord F20B DOHC Vtec
450cc dsm injectors
PR4 ecu i believe, its a non vtec ecu
locash ob2 to obd1 conversion harness
pcs used to control relay to activate vtec

pcs no longer turns off which in turn activates vtec. datalog one showing car working with pcs turning off activating vtec. one showing pcs not turning off car staying on low speed tables.

long datalog, skip to 9 minutes and 8 seconds to see pcs on for the low cam then turn off to engage vtec/high cam

From Help, about, what version of software are you using?

According to your datalog it is activating exactly as it is supposed to. What have you recently changed on the vehicle?

datalog pcs not working

i may have found the issue. reviewing the basics, the non working datalog is showing the tps at 35% during the entire datalog. wiring is good, car runs fine, so i need to check the voltage and such to figure out why it is only showing 35%