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Akane

ISCV on 1JZ-GTE VVTI

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Hi all,

 

I am using an Altezzalink on 1JZ-GTE VVTI, trying to get ISCV to work, but there's no indication that it's working at all, I have attached my tune file, is there I'm something missing?  I have wired it to AUX5-AUX8

I have attached my tune file, any assistance is much appreciated.

Thanks.

image.png.e0d66b23986a9668fd212585c31bfcaf.png

1JZ traditional.pclr

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Note also those aux runtimes that you show in your screenshot will always show "off", they only show on for basic on/off type functions like fuel pumps/fans etc.

A couple of other notes;

Your base position table doesnt have suitable numbers in it - copy the base position table from the supra base map will be a closer starting point.  Same with the max and min clamp - copy from the supra map.

You dont have ECU hold power set up so the stepper motor wont be able to reset/home after key-off, so in idle settings you will need to set it to reset at key on - and make sure you give it 5 seconds to reset after you turn the key on and before you start cranking. 

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6 hours ago, Richard Hill said:

Is it a Toyota 6 wire ISCV.? Have you supplied ignition switched live on the other 2 pins.? 

Yes, I have hooked up all 6 pins, 2x 12V+ and the ISCV gets warm when I switch to "ON" position.

2 hours ago, Adamw said:

Note also those aux runtimes that you show in your screenshot will always show "off", they only show on for basic on/off type functions like fuel pumps/fans etc.

A couple of other notes;

Your base position table doesnt have suitable numbers in it - copy the base position table from the supra base map will be a closer starting point.  Same with the max and min clamp - copy from the supra map.

You dont have ECU hold power set up so the stepper motor wont be able to reset/home after key-off, so in idle settings you will need to set it to reset at key on - and make sure you give it 5 seconds to reset after you turn the key on and before you start cranking. 

Will try those, thanks.

 

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6 hours ago, Richard Hill said:

Is it a Toyota 6 wire ISCV.? Have you supplied ignition switched live on the other 2 pins.? 

If you use Aux 5-8 for JZ ISCV then you don't need the 2 switch live wires connected. Aux 5-8 are high side outputs and drive the stepper motors directly. Stock ECU requires the 2 switch lives as the IACV signals are low side. 

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42 minutes ago, 0x33 said:

If you use Aux 5-8 for JZ ISCV then you don't need the 2 switch live wires connected. Aux 5-8 are high side outputs and drive the stepper motors directly. Stock ECU requires the 2 switch lives as the IACV signals are low side. 

In this that wont work, the OP is using the Altezza plug-in ECU which doesnt have high side drive hardware, so you must have the 2 center taps connected to 12V as it does originally.  With a wire-in ECU that has the highside hardware then you can often drive 6 wire motors in bi-polar mode as you describe - provided they pull less than 0.5A. 

 

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