How to make a D16 patch loom for Haltech Elite 550/750

Welcome to the first blogpost on the JCYT website. Thanks for reading.

The purpose of this post is to share some additional information for those looking to make a patch loom. I will update this as the video goes live and the questions come in.

Why? There are limited options for the D16 engine management, especially with the (OBD2?) P2K platform. The P2K engine harness although limited in its function, is sufficient for 99% of D16 builds.

What you need to make the patch loom.

- ECU header 178764-1 (3 receptacle) OR 174917-6 (2 receptacle)

- Assortment of 14-20g cable. 12v GROUND/POWER wires 14g, all other sensor inputs/outputs 20g is fine

- HT-030009 AMP 34 pin plug and pin set

- ECU header enclosure (V2. coming), new compact design will be available in the JCYT shop.

- HT-031014 Deutsch DTM-4 plugs and pins

- Adhesive lined heat shrink 3.2mm

- Braid sheathing (8mm, 12mm)

Here is the pinout.

https://docs.google.com/spreadsheets/d/1bwDbqOYugNAc9ZkKM7R2sYlKjV5GlQwye4Mwno8C3sI/edit?usp=sharing

Thermo fan control with Haltech Elite

Using a digital pulsed output (DPO 1), a wire can be run to the green wire on green C131 plug(AUDM passenger kick panel near the ECU). This is Pin 6 or 7 depending on the car. It is the SOLID GREEN wire. Tap into the wire by using a scotch lok or hardwire if you choose. The thermo fan control works additional to the factory fan switch and is optional.

BASEMAP QUICKSTART GUIDE

Before any "tuning" is done. Please ensure your engine configuration settings are correct. Do not overlook this step. Failure to do so will result in tuning headaches down the track. Humble Performance have an excellent video which was very helpful. I can recommend watching this for a better understanding - https://www.youtube.com/live/NWluuwkSZis?si=az67pvtz-6dhQ9Sn

These settings will give the Haltech software a reference which should get your D16 fired up and hopefully running with some minor adjustments to the tune. Note: This is what i have put together for MY setup and may not be suitable to all D series. I will not accept any responsibility for damages caused by yourself shall you try these settings.

Engine Configuration

• Trigger System

• Fuel System

• Ignition System

Engine Configuration (D16y4)

Engine capacity - 1595cc

Engine type - Piston 4 stroke

Numbers of cylinders - 4

Aspiration - Naturally aspirated (i haven't changed this since putting the turbo kit in, not sure if it will make much difference)

Max Cranking RPM - 380 (number above this value will tell the ECU the engine is running)

Engine geometry firing order - 1 3 4 2

Bank info - 1

Trigger system (you will need a timing gun for this step)

Trigger type - Generic - Standard - No Home

Tooth count Til start - 0

TDC angle - you will need a timing gun for this value

Enable TDC offset angle table

RPM filter level - 3

Quick start - Disable

Trigger signal

Sensor type - Hall effect

Edge - Falling edge

Filter level - 0

Pull up - Enable

Fuel system (The D16y4 engine harness supports only batch ignition as per the patch loom wiring diagram. While this is not ideal, it does work but does not allow ECU control over individual injector fueling. It is recommended to manually wire in each injector separately)

Ignition system

Ignition mode - Distributor

Edge - Falling edge

Dwell mode - Constant charge

Any questions? Please comment on the original video and i will update this blogpost as we go.

Launch control settings (coming soon)