2nd Gen Tacoma 4.6 V8 1UR-FE and GX powertrain Swap

The good news is that my ac lines have held pressure for over 3 months now so we are good to go on that front.

 

Here is the diagram that @Pittsy hooked me up with.

Parts list is this:
Item Quantity

LM358 I.C X1
Resistor 1KOHM X2
Resistor 10KOHM X2
Resistor 14KOHM X1





I am basically copying @Pittsy code to spoof the clutch lock sensor. I actually already have a solution for the coolant temperature signal, I purchased a module that was purpose built by @Braddman . His module allows you to hook up a temp sensor and translates the coolant temp to the signal that the Tacoma AC amp is looking for.

Here is the code that @Pittsy used:

unsigned long previousMillisPin5 = 0; // Variable to store the last time pin 5 (PORTD5) was updated
unsigned long previousMillisPin6 = 0; // Variable to store the last time pin 6 (PORTD6) was updated
unsigned long previousMillisPin10 = 0; // Variable to store the last time pin 6 (PORTD6) was updated
const long intervalPin10 = 55; // Interval at which to blink pin 5 (milliseconds) //9hz //voltage divider //2.5V
const long intervalPin5 = 12; // Interval at which to blink pin 5 (milliseconds) //41hz //opamp //12V
const long onTimePin6 = 180; // On time for pin 6 (milliseconds)//2hz //simple //5V
const long offTimePin6 = 238; // Off time for pin 6 (milliseconds)
int dutyCycle = 0; // Initial duty cycle
bool pin6State = LOW; // Initial state of pin 6
#define PWM_PIN 10

#include <avr/io.h>
void setup() {
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(PWM_PIN, OUTPUT);
}

void loop() {
unsigned long currentMillis = millis(); // Get the current time

// Blink pin 5 (PORTD5)
if (currentMillis - previousMillisPin5 >= intervalPin5) {
previousMillisPin5 = currentMillis;
PORTE ^= (1 << PORTE3); // Toggle pin 5
}

// Blink pin 6 (PORTD6)
if (pin6State == HIGH && currentMillis - previousMillisPin6 >= onTimePin6) {
pin6State = LOW;
previousMillisPin6 = currentMillis;
PORTH &= ~(1 << PORTH3); // Turn off pin 6
}
else if (pin6State == LOW && currentMillis - previousMillisPin6 >= offTimePin6) {
pin6State = HIGH;
previousMillisPin6 = currentMillis;
PORTH |= (1 << PORTH3); // Turn on pin 6
}

//PORTB ^= (1 << PORTB2); // Toggle pin 10
if (currentMillis - previousMillisPin10 >= intervalPin10) {
previousMillisPin10 = currentMillis;
PORTB ^= (1 << PORTB4); // Toggle pin 10
}


// analogWrite(10,1);
// delay(55);
// analogWrite(10,0);
// delay(55);
// DDRB |= (1 << DDB1);
// // PB1 as output
// OCR1A = 0x01FF;
// // set PWM for 50% duty cycle at 10bit
// TCCR1A |= (1 << COM1A1);
// // set non-inverting mode
// TCCR1A |= (1 << WGM11) | (1 << WGM10);
// // set 10bit phase corrected PWM Mode
// TCCR1B |= (1 << CS11);
// delay(1000);
// TCCR1A &= ~(1 << COM1A1);
// set prescaler to 8 and starts PWM
// myPwm(127, 7.5); //e.g. (127/255)50% duty with 7.5 Hz
// delay(1000);
// myPwm(13, 10); //e.g. (13/255)5% duty with 10 Hz
// delay(1000);
// myPwm(204, 5); //e.g. (204/255)80% duty with 5 Hz
// delay(1000);
}
//void myPwm(unsigned char duty, float freq) {
// TCCR1A = 0x21;
// TCCR1B = 0x14;
//}

 

See my post above.

 

Hey Denis, please post some new pictures of your truck in its current condition.

 

Hey Everyone,

I was going to pull it out of the garage today but the battery went flat. It is on the charger now. I will get some pics of it tomorrow.

 

I got all the parts I need for the clutch lock signal spoof. Since I only need the clutch lock signal can anyone revise the diagram above to make this setup more optimized?

Last I checked, I think the GX makes the same RPM and ACT and AC1 signals. The coolant temp signal is already taken care of with my other module.

 

Can't comment on the hardware layout for optimization, but I'd do a lot of testing with the code using Millis() to track time. The comparisons that code is doing seem pretty safe, but depending on the quality of the board you can get some time drift and the code can do odd things as that value gets larger and larger. I've used millis() successfully in some projects and in others I've had to utilize a RTC module to do any time calculations.

 

is there any thread that talks about wiring this up on a 2nd gen setup?

 

got info on that fan setup you can pass over. Looks clean.

 

Here are some updated pictures. I have all of the body parts I am just not yet bolting them on while I work out all of the laundry list of gremlins.

 

Here is a video of it running.

https://youtu.be/DgFh4ALn8jk?feature=shared

 

hell yah!

 

Okay guys, I have absolutely no idea what is going on here. Please help if you can.

 

Looks like something to monitor signals. I'm not really familiar with Arduino, but it looks like the functions "setup" and "loop" are empty at the top, but appear again at the bottom with code in them.

Also, I see this on line 9

Code:

}unassigned long previous....

But it should look like this:

Code:

}

unassigned long previous...

Could cause the code not to run or compile properly. I would think lines 1 through 8 plus the curly bracket at the beginning of line 9 can go, but someone more familiar with Arduino can say for sure.

 

I was able to successfully upload the code on to the board, I just had to delete the default startup text on the arduino software and then paste the code above. Time to wire it up.

What I need is:

2.5V, 9hz signal for compressor lock

I don't need:

5V, 2hz signal for engine coolant temp because I have another module that is supplying this already.
12V, 41hz for engine RPM signal because both GX and Tacoma PWM signals are the same so I just tapped into RPM signal off of the GX460 ECU






RPM signal:

 

Hey Guys,

I am wiring up the board today. Could someone help me understand where does the board get its power in this diagram? I see that it has a ground but no positive hookup in the power section of the board.

 

There is a black barrel jack on the end of the board. I just soldered wires to the jack to give it power.

 

12v from ignition source should work?

 

yep! thats what I used.

 

Well guys, here is how I wired it up and it doesn't work. The AC system has about 50 psi pressure in the system. I also took AC signal and hooked it up directly to 12v since the gx460 ACT signal is 5v and still nothing. I don't really know where to go from here. On top of this, the truck is acting up with the fuel pump fuse blowing again lol. Any input would be helpful.