Need Help With Rb20 Consult Cable

[shaunmlawry]

Hey guys

I have put a RB20 silvertop into my R31.

I have bought a consult cable, one of the blitz ones.

I have installed everything, and directly wired it into the ecu wires.

But my software isn't picking the ECU up.

Is there anything special i have to do to get it working?

Also does anyone know what voltages are supose to be on the TX, RX, and CLK cables?

I am getting an error can't open my com port as well.

I am thinking this might be the problem.

But if anyone could give me the voltage readings, it would be greatly appreciated

Thanks for any help

Is this right?

Black = Ground

Blue = CLK

White = RX

Yellow = TX

Red = 12V

Edited December 1, 2006 by shaunmlawry

[whiter31gxe]

If your getting an error about opening the comm port id go looking at the laptop 1st!

[shaunmlawry]

all the drivers are installed, and windows picks up the cable fine.

Its just all the programs that arn't picking up the ECU, only the free Conzult software says can't open port, the others try and find the ECU but can't

Is there any manual way of testing the consult cable?

[PlasticStan]

all the drivers are installed, and windows picks up the cable fine.

Its just all the programs that arn't picking up the ECU, only the free Conzult software says can't open port, the others try and find the ECU but can't

Is there any manual way of testing the consult cable?

Did you connect RX to RX and TX to TX?

If so try swapping the RX and TX wires. For a serial connection you always connect RX on one connection to TX on the other, and vice versa.

[paulr33]

are u using a true serial port or a usb dongle converted one?

try a real serial port, it may work better

[shaunmlawry]

are u using a true serial port or a usb dongle converted one?

try a real serial port, it may work better

Tried changing the TX and RX wires, still said can't find ECU.

The cable is a USB one, no serial port.

Thanks for the suggestions guys, this has me stumped

TX has about 10v

RX has .4v

And CLK has around 2.4V

Can someone with a USB cable maybe measure the voltage readings that they are getting on the cables in the USB plug just before they go into the computer, this should tell me if my cable is working properly.

Tomorrow i am gonna get a mates computer and see if it works on it, it might just be my laptop

Thanks again

Edited December 1, 2006 by shaunmlawry

[NewKleer]

CLK is correct (~5V @ 50% dutycycle = 2.5v)

transmit from ECU (ie, TX on ecu pinout) should measure 0->5v (somewhere in between) when connected

receive from ECU (RX on ecu pinout) should measure 0->12v roughly, depending on whether pc is transmitting or not.

what is ur ECU serial number? (23710-xxxxx). early R32 ecu's (until ~9/89) didnt have consult capabilities.

Edited December 2, 2006 by NewKleer

[shaunmlawry]

CLK is correct (~5V @ 50% dutycycle = 2.5v)

transmit from ECU (ie, TX on ecu pinout) should measure 0->5v (somewhere in between) when connected

receive from ECU (RX on ecu pinout) should measure 0->12v roughly, depending on whether pc is transmitting or not.

what is ur ECU serial number? (23710-xxxxx). early R32 ecu's (until ~9/89) didnt have consult capabilities.

23710-73L10

I tried the cable with another computer and it still wouldn't pick up my ECU

Thats probably the problem, my ECU doesn't support it

Thanks for the help

[NewKleer]

ur ecu is from an a31 cefiro - they dont support consult.

youll need an r32 ecu. dont get any of these (i think the rest should be ok):

23710-04U00

23710-04U10

23710-04U11

thats on assumption a31 motor can work with r32 without any changes, if u have an a31 motor

Edited December 2, 2006 by NewKleer