crazy ecu , not sure what to do - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

zaquanh · 01-05-2009, 10:16 AM

on every sr20 ecu ive used , there is a led and a screw , you turn the screw start the car and it goes into diagnostic mode , led blinks blah blah blah

but on my black top e5 ecu

there is no led

when you turn the screw in both directions nothing changed , car drives regular?

it doesnt even look like there is a post for the led , theres a hole but nothing except the board inside ,

but i still have some problems and wanted to check codes , what should i do with that ? ive never seen this before

slider2828 · 01-05-2009, 10:36 AM

I think there has been posts about this. I believe there were some ecu's don't remember what year that had no LED in it. I think you use the check engine light or a CAN scanner or something...

96Turbo · 01-05-2009, 10:55 AM

on my RB25 Ecu there is no screw or LED whatsoever. I hafta jump the CHK (diagnostic start) wire on the ecu to the IGN wire for a few seconds with the key in the ON position.

Then, when i disconnect these 2 wires it's in diagnostic mode and the codes flash on my check engine light

zaquanh · 01-05-2009, 02:04 PM

Quote:

Originally Posted by 96Turbo

on my RB25 Ecu there is no screw or LED whatsoever. I hafta jump the CHK (diagnostic start) wire on the ecu to the IGN wire for a few seconds with the key in the ON position.

Then, when i disconnect these 2 wires it's in diagnostic mode and the codes flash on my check engine light

does this work on the sr too?

anyone know

01-05-2009, 10:16 AM	#1
zaquanh Zilvia FREAK! Join Date: Feb 2007 Location: san antonio Posts: 1,073 Trader Rating: (3) Feedback Score: 3 reviews	crazy ecu , not sure what to do on every sr20 ecu ive used , there is a led and a screw , you turn the screw start the car and it goes into diagnostic mode , led blinks blah blah blah but on my black top e5 ecu there is no led when you turn the screw in both directions nothing changed , car drives regular? it doesnt even look like there is a post for the led , theres a hole but nothing except the board inside , but i still have some problems and wanted to check codes , what should i do with that ? ive never seen this before

01-05-2009, 10:36 AM	#2
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	I think there has been posts about this. I believe there were some ecu's don't remember what year that had no LED in it. I think you use the check engine light or a CAN scanner or something... __________________ Turn and Burn!

01-05-2009, 10:55 AM	#3
96Turbo Zilvia FREAK! Join Date: Nov 2007 Location: AZ Age: 36 Posts: 1,315 Trader Rating: (11) Feedback Score: 11 reviews	on my RB25 Ecu there is no screw or LED whatsoever. I hafta jump the CHK (diagnostic start) wire on the ecu to the IGN wire for a few seconds with the key in the ON position. Then, when i disconnect these 2 wires it's in diagnostic mode and the codes flash on my check engine light