Launch control+ ALS stay always ON

[dochka]

Hi,
Just wired a diy MS3+MS3X to run a Toyota 2JZ engine, all works fine except when I enable "Launch" on "Launch In" and ALS on "Tableswitch", both are "ON" when the engine starts and cannot be turned off except from the TunerStudio menu;
The ground switches doesn't seem to be doing anything when I switch them to ground
When I turn the Ignition switch to the "ON" position, the "launch in" and "tableswitch" switches to ground doesn't arm anything.
I also have a Defi tacho that needs a + signal to work, what output can i use to give me a positive signal to make the tacho work ?

Thank you

[jsmcortina]

[dochka]

[jsmcortina]

Datalog too please.

Measure the voltage on the wires going to the Launch and ALS switches.

Did you install the S12C-JS9 jumper wire on the mainboard?

James

[dochka]

Datalog too please.

Measure the voltage on the wires going to the Launch and ALS switches.

Did you install the S12C-JS9 jumper wire on the mainboard?

James

Will post the datalog tomorrow, already left the garage today..
Don't remember if the S12C-JS9 is installed, should it be ?
What about the output to use to make the tacho work ?
I need a positive output

[jsmcortina]

The S12C-JS9 link MUST be installed or the switch inputs won't work.

Depends on the current required. "Tacho" provides a 0-12V pulsed output. This is described in the Hardware manual.

James

[dochka]

The S12C-JS9 link MUST be installed or the switch inputs won't work.

Depends on the current required. "Tacho" provides a 0-12V pulsed output. This is described in the Hardware manual.

James

The polarity "tacho" outputs is negative, I checked with a test light;
The tachometer didn't work, I installed a relay and switched the polarity, it worked but if I rev it past 1600rpm the relay stops clicking and the tacho goes to zero
Can I use IAC1 or others instead ?
Do they give a positive polarity ?

[kjones6039]

The polarity "tacho" outputs is negative, I checked with a test light;

Makes me curious...... How do you check polarity with a test light?

Ken

[dochka]

The polarity "tacho" outputs is negative, I checked with a test light;

Makes me curious...... How do you check polarity with a test light?

Ken

You put one end to chassis ground lets say, if the light comes on it means the source is positive;
Similarly, if you put one end to a positive cable lets say of the alternator or battery (+) and the other end on the source and the light comes on, means it sends negative pulses

[kjones6039]

Ah ha! The light comes on (pun definitely intended)! It appears that we are actually talking LED here, not incandescent bulb/test light. Thank you.

Ken

[slow_hemi6]

The S12C-JS9 link MUST be installed or the switch inputs won't work.

Depends on the current required. "Tacho" provides a 0-12V pulsed output. This is described in the Hardware manual.

James

The polarity "tacho" outputs is negative, I checked with a test light;
The tachometer didn't work, I installed a relay and switched the polarity, it worked but if I rev it past 1600rpm the relay stops clicking and the tacho goes to zero
Can I use IAC1 or others instead ?
Do they give a positive polarity ?

It does not say to use a relay. It says to use a relay coil. Just the coil, you have to remove the switching armature. No clicking should be heard.

[dochka]

The S12C-JS9 link MUST be installed or the switch inputs won't work.

Depends on the current required. "Tacho" provides a 0-12V pulsed output. This is described in the Hardware manual.

James

The polarity "tacho" outputs is negative, I checked with a test light;
The tachometer didn't work, I installed a relay and switched the polarity, it worked but if I rev it past 1600rpm the relay stops clicking and the tacho goes to zero
Can I use IAC1 or others instead ?
Do they give a positive polarity ?

It does not say to use a relay. It says to use a relay coil. Just the coil, you have to remove the switching armature. No clicking should be heard.

So how the coil will switch the polarity ?

[grom_e30]

have you installed the S12C-JS9 jumper yet? have you tried using or removing the pull up jumper on the ms3x card?

[dochka]

have you installed the S12C-JS9 jumper yet? have you tried using or removing the pull up jumper on the ms3x card?

Installed the S12C-JS9 jumper, issue solved, now the switches work! Dunno why I forgot to install that jumper
I tried both installing and removing the J3 jumper in the MS3X card, both ways the tacho output stays negative and the tachometer doesn't work

[slow_hemi6]

What do you have the stand alone defi racer gauge or the type with the separate link controller? Standalone just needs a squarewave logic input on the blue wire, maybe 12v tolerant but I don't know for sure. The rest should just be 12v, gnd and illum.