No ecu working

[smart_garrett]

Looking for a little electrical help. I have a hcr32 on a Nistune ecu that at first, had problems with holding connection to the software even with the key only in the on position with the engine off(so not an electical noise issue). Now, I cannot connect to the ecu at all with Nistune, or data scan software. I have tried different cables, different laptops, even re-wired a new consult port in. After that I tired the paper clip jump trick to get codes to flash and nothing worked. I have just got another oem ecu, and still have no luck. I’m quite stuck now and id appreciate any help. Thanks

Edited September 21, 2020 by smart_garrett

[robbo_rb180]

Does the car start and run?
If ecu is not getting power check ECCS relay and associated fuse

If just a communication issue test the continuity of the wiring from the consult port to the ecu

[smart_garrett]

19 minutes ago, robbo_rb180 said:

Does the car start and run?
If ecu is not getting power check ECCS relay and associated fuse

If just a communication issue test the continuity of the wiring from the consult port to the ecu

The car starts and runs great. I also tested the wiring from the consult port to ecu and everything was good, even rewired a new port and still no luck.

Edited September 21, 2020 by smart_garrett

[robbo_rb180]

ok, double check the continuity/resistance of the consult plug wiring and correct connections at ecu and port.
Have a re-read of this Nistune Diagnostic/Connection issue guide
https://nistune.com/docs/Installation_and_Communication_Diagnostics.pdf

consult port wiring guide
http://nistune.com/docs/MAF_and_Consult_pinouts.pdf

for it to be an issue with the factory ecu in my opinion it is a wiring/pinout issue

[smart_garrett]

8 minutes ago, robbo_rb180 said:

ok, double check the continuity/resistance of the consult plug wiring and correct connections at ecu and port.
Have a re-read of this Nistune Diagnostic/Connection issue guide
https://nistune.com/docs/Installation_and_Communication_Diagnostics.pdf

consult port wiring guide
http://nistune.com/docs/MAF_and_Consult_pinouts.pdf

for it to be an issue with the factory ecu in my opinion it is a wiring/pinout issue

The consult wiring guide is the guide I used to rewire my consult port to a new wiring specialties pig tail. I have 12v and a ground, but I’m not sure what I should be seeing at the Rx, tx, and clk connections, if anything.

[GTSBoy]

48 minutes ago, smart_garrett said:

what I should be seeing at the Rx, tx, and clk connections, if anything

Nothing that you can see with a multimeter. That's a serial link. You're talking digital data at many kbaud.

[smart_garrett]

14 hours ago, GTSBoy said:

Nothing that you can see with a multimeter. That's a serial link. You're talking digital data at many kbaud.

That’s what I was thinking that’s why it’s hard to see if it’s receiving or transmitting data. 

[joshuaho96]

6 hours ago, smart_garrett said:

That’s what I was thinking that’s why it’s hard to see if it’s receiving or transmitting data. 

If you have an oscilloscope you can see the serial signal.