[RB25 plugin ecu problem]

Update: jumped the eccs relay car start right up all functioning. So confirmed relay fault. Thank Adamw Simon

[RB25 plugin ecu problem]

1 hour ago, Adamw said:

Yes, that may happen since you have the key on, but relay out, some of the accesories will be powered up (such as boost valve etc), but the ECU is not powered up.  The 12V from those auxilaries can backfeed through diodes etc in the ecu then "come out" of the pin 49/59.

 

Yep, perfectly fine to do that and that will tell you if that relay is the problem or not.  Just make sure that you do bridge 3&5 and not 1&2.  bridging 1&2 will pop a fuse. 

 Alright. Will try it out tomorrow and let u know.

One more thing. Is the check light supposed to light up during ign on and goes off when engine running like oem? 

[RB25 plugin ecu problem]

So what u r saying is that without the eccs relay plugged in the ecu pin 49&59 registering 9v is normal? 

Is jumping the relay pin 3 & 5 with short wire ok for troubleshooting? I'm worried I might cause damage to the ecu.

[RB25 plugin ecu problem]

Just checked. Pin 49 and 59 registered around 9v with eccs relay plugged in and ign on. Voltage between 49 and 10 also registered the same voltage around 9.

Additional info: pin 3 & pin 2 on ecss relay socket registered 12v. Pin 5 registered 9v.

 

[RB25 plugin ecu problem]

I recently purchased a link g4+ plugin ecu for my r33 rb25. Got it tuned and running perfectly for the past 3 weeks. Yesterday my wideband suddenly registered rich 10.0:1 afr ( dead time went up bcoz of low voltage ) and voltage on +12v internal shows 8.9x volts. Ignition on the check engine light is dimmed and the Motorsport functions are all no working. Upon checking the ecu is outputting around 9v on pin 49 & pin 59 with the eccs relay unplugged and ignition on. Any ideas?