Had a rb20 6cyl 2.0L Nissan engine. Mechanic got it on a wrecker, scan showed crank code but new cam and crank sensor didn't fix it.
Using a soldering gun I tried to get a response from the pcm (fire coils etc) but nothing. Took the 2 wire CKP off and repeated unplugged with volt meter attached in AC and it worked. Decided to go at the brain and found water intrusion in the harness but not the ecm.
At the ecm, on a crank using uscope, one wire was 12v all the time and the other showed a signal. I snipped the hot wire on both the ecm and sensor and jumped a fresh wire. Boom! Car started, now it has a misfire but that's for another day.
Using a soldering gun I tried to get a response from the pcm (fire coils etc) but nothing. Took the 2 wire CKP off and repeated unplugged with volt meter attached in AC and it worked.
Interesting -- I'll be playing with a crank sensor on a bench test to get a feel for it.
Also another one on target for the uScope --- it might not be Pico but a very handy little tool.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Last edit: 8 years 10 months ago by Andy.MacFadyen.
Sorry for late update. Car had multiple issues including 3/6 bad coils :huh: . In the harness there's a female junction/plug that's terminated but a male endcap, water got in there and everyone was in contact. The owner seemed reluctant to repair the hole in his firewall so I snipped the wires, joined those that should be joined, sealed it all up and sent it off.
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