Re: ccm/bcm testing
update,
checked VSS wiring up to the ECM yellow plug pin 5 connectivity from the
toss signal . The toss signal is a reproduction of VSS signal to use for ECM.
The VSS is used by the trans controller for controlling the trans.
Now about 2 months ago i had SYS flashing on the speed/odd display. Checked the codes for the CCM , codes H32- H34-H36 and H38. Cleared codes they did not return.This time the codes remained. Turns out that i found the ground wire
for ratio adapter to be loose causing the loss of MPH ODD, trip mileage etc.
remade ground connection will test later, 98% sure that is my trouble.
so no ground to the ratio adapter, no sig to ecm.
Thanks for the help
John
1990 white/black #2546
one of a few auto 4l80E eq. zr-1's
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