This is related to Test 5 of this question: OBD II Scanner refuses to communicate with the vehicle!
Funny that I should be asking this but then .....it happens
Unfortunately, I cannot remember.
I'd appreciate pointers.
I have a strong suspicion that maybe the correct expression should have DLC Bus terminals and not DLC Bias terminals, courtesy of the diagram below courtesy of Wikipedia.
Thank you.
OPTION 1: (My thoughts) TEST 5: Connect positive DMM lead to either DLC BUS terminals (DLC Pin 2 or DLC Pin 10)
Connect negative DMM lead to the ground terminal
With the ignition key ON and no bus activity, BUS + should read 0V BUS - should read 5V
With the ignition key ON and bus activity, the voltage should vary from 0 to 5V depending on the amount of bus activity!
OPTION 2: (Suggested by narkeleptk) TEST 5: Connect positive DMM lead to either DLC BUS terminals (DLC Pin 7 or DLC Pin 15)
Connect negative DMM lead to the ground terminal
With the ignition key ON and no bus activity, BUS + should read 0V BUS - should read 5V
With the ignition key ON and bus activity, the voltage should vary from 0 to 5V depending on the amount of bus activity!
