OBD2 Cannot Communicate with ECM

Joined
Apr 5, 2017
Messages
23
Location
AL
On my 96, I have a CEL and want to see if there are any codes. So I plugged in the OBD2 and started Torque on my phone. It just keeps trying to connect and no matter what it says it cannot communicate with the ECU (or ECM - forgot which terminology it uses).

I actually tried 3 different OBD2 readers - none work on my 80. (All 3 readers do work on my 4Runner however, so I know they function correctly.)

So, what should my next step be as far as troubleshooting? And what does this probably indicate?

I am wondering if my ECU is dead. I hope not, because it looks fairly expensive to replace. (And, would the vehicle even start if it was bad?)
 
Joined
Mar 22, 2017
Messages
115
Location
SoCal
Check for power at pin 16, may have a blown fuse(typically the cig ligter fuse but not sure on a FZJ80)
 
Joined
Apr 5, 2017
Messages
23
Location
AL
I verified the ECU was indeed getting power. It actually ended up being totally fine. The problem was a the cheap ELM327 unit I was using - it just plain doesn't work on all vehicles (in my case, the LC).
 
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