SC300 Help

[ihiryu]

Hey guys I'm working on a 1994 Lexus SC300. It uses a Distributor, and a KMV sensor.

I have it in piggyback mode

Pin 31A is 12v

Pin 69B is ground

Pin 66B is KMV Signal

Pin 27B is Crank signal.

So for the KMV I have it attached to the Frequency In and Out on the DET3, and for the Crank Signal I have it on Ignition In and Out.

Both of these have pull up's attached to the Sensor side of it. 8+9 (Crank), 2+10 (KMV).

However, I'm not getting any RPM reading in the ignition setup screen. I get it on the main screen, but it reads low (200 is 1000).

I don't know if I should be using the Bi Polar Ignitions instead.

[ihiryu]

So after doing some reading, it seems like the 2jzge uses a VR Sensor and not an hall effect.

So I took off the pull up, and wired it to Bi Polar Ignition Out, and a bit better, but the RPM"s are still noisy, and I can't launch control to work

[Jostar]

Ignition should be just like the 1jz settings I believe.

[ihiryu]

That's the thing I'm worried about, I figured it would use a different ignition setting since it uses a distributor.

[Jostar]

That's the thing I'm worried about, I figured it would use a different ignition setting since it uses a distributor.

I understand your concern, but Toyota uses the type of sensors settings on the DIS and CRANK/CAM sensors, I learn this when people were using the TT ecu in N/A set ups.

so the settings for the 1jz should work on the SC300.

[Jostar]

Are you running a Turbo/NA set up?

[ihiryu]

NA-T setup.

[Jostar]

Last time I datalogged the MAf on my 93 SC300 it was a 5 volt, so the settings should be the same as a 1JZ or what I posted.

[Jostar]

I try attaching the image but it did not let me.

[WHPZach]

Ignition settings will be exactly like the 1JZ diagram in the manual.

Airflow meter needs a pullup, and it needs to go to the frequency input, not an analog input.

[Jostar]

Ignition settings will be exactly like the 1JZ diagram in the manual.

Airflow meter needs a pullup, and it needs to go to the frequency input, not an analog input.

Zach, you sure about the airflow?? I logged it and it showed voltage vs a frequency.. I know the 7m is for sure a frequency MAF.

[ihiryu]

Early SC's are KMV sensors. Later model (95+) goes to an MAF

[Jostar]

Early SC's are KMV sensors. Later model (95+) goes to an MAF

Awwww Learn something new... I wonder if the datalogger I got converts the KMV to voltage??

[ihiryu]

Anyone got the settings for the KMV sensor? I can't seem to get this one running right.

Car ran good before the DET3, configured the ignition, and get RPM's, but for some reason it's just not running right.

[mihaicsv]

What ignition settings are you using in Setup/Ignition Configuration? Are the rpm in DET corresponding to the car tach?

[ihiryu]

I used the 1jz settings in the manual like Zach told me to.

I obviously used different pins though.

The RPM's don't actually match the cluster and the software. Sometimes it does, sometimes it doesn't

Which I thought was a little weird

[mihaicsv]

Crank signal is 27B on your diagram.If you cut that and turn the key ,it shouldn't start - if it does that's not the crank signal and your diagram is wrong or for another ecu. If it's right you should plug the engine side to pin 9 DET and ecu side (of the crank wire) to pin 5 ecu.Next thing is figuring out what kind of crank wheel have you got (how many teeth) and if you have any missing teeth on it - double it and put the value in 'Num signals per 720' under Setup/Ignition Configuration .Ignition mode can be 'Retard/Advance multitooth signal' and Ignition input type can be 'VR sensor adaptive threshold'.
Any luck?

[ihiryu]

Yeah all that was already setup.

I just need some help with the KMV sensor.