NIStune Feature Pack User Manual

Hardware Installation Manual

Copyright 2014-2015 Nistune Developments

Table of Contents

Overview ...........................................................................................................................................................................3

Flex Fuel ............................................................................................................................................................................4

Launch Control Operation...............................................................................................................................................17

Variable Cam Timing Output...........................................................................................................................................20

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Overview

This is the first edition of the Nistune feature pack. The feature pack offers enhanced features over the standard ECU
for a selected range of vehicles.

The standard ECU code has been modified using patch code to provide the most customers requested features. We
do plan to add more features when possible in the future.

This document covers the ECU modifications required to use Flex fuel and Launch Control features

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Flex Fuel

Flex fuel sensors measure the ethanol content of fuel passing through it and report the rating as a percentage. The
sensors output a frequency and a converter is required to translate this into a voltage which can be read by the ECU.

Nistune will read the flex fuel input via diagnostic connector input on the ECU. This requires modification of the
Nissan ECU hardware. A flex fuel kit comprising a sensor and content analyser is required.

Nistune Flex Converter

Nistune have developed a content analyser board which is internally mounted to the ECU. It will be sold with the
board and flex cable. Flex fuel sensors can be purchased separately.

The flex board is mounted to the top of existing components using durable double sided table.

BLACK - GND
RED – 12V
GREEN – Input

Run a 5 volt line from the regulator to the 5V input

Sensor Installation

WARNING: Competent professionals must install the flex fuel sensor according to the manufacturer’s instructions.

The flex fuel sensors are normally installed on the return line to the fuel tank. Flex sensor: Continental #13577394

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Image: Flex fuel sensor connected to fuel return line on S14 200SX

Zeitronix ECA 2

Zeitronix sell a content analyser in various packages, including with and without a display.

http://www.zeitronix.com/Products/ECA/ECA.shtml

The ECA-2 module includes wiring information. For wiring to your ECU Red is wired to the ECUs switched 12V power
line and Black is wired to the Ground line.

Image: HCR32 ECU with two end pins connected to flex converter power

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Nissan ECU Connectors

Z31 VG30 / R31 RB30 / VL RB30

Pin 27 is power, Pin 28 is ground

S13 CA18DET, S14 SR20DET, HCR32 RB20DET, BNR32 RB26DETT, Z32 VG30DET etc

Pin 49 is Power and pin 50 is Ground

S13/S14A/S15 SR20DET, P11 SR20DE, B13 SR20DE, S13 KA24DE etc

Pin 38 is Power and pin 39 is Ground

ER34/WC34 RB25DET

Pin 67 is Power and Pin 25 is ground

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Diagnostic Potentiometer Removal

Earlier Nissan ECUs are fitted with a diagnostic potentiometer. This will require removal in order to fit the flex fuel
sensor line to the ECU.

Remove the diagnostic connector by unscrewing (or desoldering if surface mounted) and then fit the flex fuel sensor
line in place to the diagnostic input.

Image: HCR32 ECU diagnostic potentiometer

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1. Z31 300ZX VG30 / VL RB30 / R31 RB30 ECU

- Cut both lines to the diagnostic connector

- Connect top line (GND) to Ground input on flex fuel converter

- Connect bottom line (Diag input) to OP on flex fuel converter

- Source 5V supply from OPAMP board Pin 21

- Source 12V supply from ECU power line on ECU connector pin 27

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2. S13 CA18DET ECU

- Cut both diagnostic wires and connect LHS line to flex fuel sensor output line.

- For the Nistune Flex Converter, power the unit using the RHS line which provides 5 volts

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-

3. HCR32 RB20DET ECU

- Cut both diagnostic wires and connect RHS line to flex fuel sensor output line.

- For the Nistune Flex converter, power the unit using the 5 volt output from the ECU as marked

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4. BNR32 RB26DETT ECU

- Cut both diagnostic wires and connect RHS line to flex fuel sensor output line.

- For the Nistune Flex converter, power the unit using the 5 volt output from the ECU as marked

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5. Z32 300ZX VG30DE/DETT ECU

- Cut both diagnostic wires and connect LHS line to flex fuel sensor output line.
For the Nistune Flex converter, power the unit using the 5 volt output from the Q101 middle pin as marked

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6. S13 SR20DE/SR20DET ECU

- Remove VR229 (variable resistor)

- Solder flex fuel input line as pictured to lower solder pad

- For the Nistune flex converter, power the unit using the 5 volt output from the middle pin as marked

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7. S14 SR20DET ECU

- Remove resistors J200 and J201

- Solder flex fuel input line as pictured to lower solder pad

- For the Nistune flex converter, power the unit using the 5 volt output from the middle pin as marked

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8. S13 SR20DET (Type R/X) / S14A SR20DET / S15 SR20DET / P11 SR20DE ECU

S13 (Type X) // S14A/P11 ECU rear of ECU. S15 next to diagnostic connector

- Removed marked resistor R226

- Solder flex fuel input line as pictured to middle solder pad of V200

- For the Nistune flex converter, power the unit using the 5 volt output from the middle pin of the voltage
regulator as shown

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9. ER34 / WC34 RB25DET / Y33 VQ30DE ECU

- Remove resistor R347

- Solder flex cable as marked to LHS pad of V300

- For the Nistune flex converter, power the unit using the 5 volt output from the middle pin of the voltage
regulator as shown

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Launch Control Operation

External Switch Trigger

Launch control can be triggered either using the speed input, or using an external switch. Disconnect the Power
Steering line from the ECU and connect directly to a clutch switch to trigger the launch control externally.

Image: Wiring external trigger between ground and power steering line

Z31 VG30 / R31 RB30 / VL RB30

Pin 28 - Ground
Pin 27 - 12V power

RB30
Pin 30 - MAF calibration signal (RB30 only). Wire as per S13 CA18DET with switch

VG30
Pin 15 - Fuel temp input (VG30 only) wire this end switch as above, and other side of switch to Pin 28 (GND)

S13 CA18DET

Pin 37 - MAF Calibration signal (non-cat models have a line, cat models will need this pin inserted)
Pin 60 - Ground
Pin 49 - 12V power

To reuse the MAF calibration signal, hold down the line using around 100K ohm resistor and use a pull up to 12V via
clutch switch or similar. We use pull up here because of capacitance held on the line.

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Other ECUs

Cut the power steering line at the ECU and connect to a shielded cable with shield connected to ground. The switch
can be operated by clutch or otherwise. A momentary push of the switch will enable/disable the launch control
output.

S14 SR20DET, HCR32 RB20, BNR32 RB26, Z32 VG30 etc

Pin 19 – HCR32 / BNR32: Power steering switch trigger
Pin 34 - S14 SR20DET/Z32 VG30: Power steering switch trigger
Pin 60 – Ground

S13/S14A/S15 SR20DET etc

Pin 43 – S13/S14A/S15/P11: Power steering switch trigger
Pin 39 - Ground

ER34/WC34 RB25DET

Pin 26 – Power steering switch trigger
Pin 25 - Ground

S14 KA24DE/B14 SR20DE

Pin 25 – Power steering switch trigger
Pin 32 - Ground

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Variable Cam Timing Output

Special firmware updates have been made for HCR32 RB20DET and A31 RB20DET ECUs for triggering VCT output
using existing ECU outputs when these ECUs are used with RB25DET engines. There are three flavours of firmware
depending on ECU and if air conditioning is required

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RB25DET using RB20DET ECU

Fuel Pump Idle Control output (23710-11UXX/04UXX R32 ECU)

1. Remove Fuel Pump Control idle output.

Pin 104 - Controls idle fuel pump voltage to Fuel Pump Control Module (FPCM). When installing an aftermarket high
flow fuel pump, it should be controlled directly from the fuel pump relay rather than FPCM.

This ECU output is normally used to vary fuel pump idle speed with the factory fuel pump. This pin will no longer be
used and the output from the ECU will control the VCT

HCR32_FOR_RB25_11U0F_MT_TPS_VCT_VFCOUT_v5_FP.ENT

1. Cut pin 104 from ECU connector to pad on board, leaving about 2mm exposed from board.

2. Slightly push other pins to access pin 113

Add solder to pin 104 (from ECU board)
Add solder to pin 113 (VCT from connector)
Add solder to pin 107 (top ground pin)

3. Source BD679 Darlington Transistor (SOT-32 package) and pre-tin (solder) ends of transistor
Available from Farnell (Element-14) and other electronics specialists

4. Solder transistor to ECU with shiny shielded side facing upwards

Pin 1 (Base) - Solders to pin 104 coming from the circuit board
Pin 2 (Collector) - Solders to pin 113 coming from ECU plug (VCT output)
Pin 3 (Emitter) - Solders to pin 107

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1.5 Vehicle will operate as normal with VCT operation now allowed, and Fuel pump idle disabled.

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RB25DET using RB20DET ECU

Air Conditioning output (23710-11UXX R32 ECU)

1. Remove RB25 Air conditioning output

A31: HCR32_FOR_RB25_11U00_74L00_MT_FP_TPS_VCT_ACOUT_v5.ent
R32: HCR32_FOR_RB25_11U00_MT_FP_TPS_VCT_ACOUT_v5.ent

Pin 113 - ECR33 RB25 - VCT output solenoid
Pin 9 - Air conditioner relay

2. Cut pin 9 from ECU

3. Solder pin 9 to pin 113

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RB25DET using RB20DET ECU

Spare LED output (23710-04UXX R32 ECU, 23710-74Lxx/79Lxx A31 Cefiro ECU)

1. Utilise spare GREEN diagnostic LED (Available A31 and early R32 ECUs only)

A31: HCR32_FOR_RB25_11U00_74L00_MT_FP_TPS_VCT_LEDOUT_v5.ent
R32: HCR32_FOR_RB25_11U00_MT_FP_TPS_VCT_LEDOUT_v5.ent

HCR32 ECUs must be part number 23710-04UXX or MEC-R1XX which have the placement for the second LED on the
circuit board

2. Remove the GREEN LED (if fitted and supporting diode on reverse side of the ECU)

3. Solder the VCT line where shown (where the GREEN LED was fitted)

4. Solder to pin 113 as pictured

5. Fitment should look as pictured

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SR20VE using P11 SR20DE ECU

PIN 114 – Evaporative Canister Purge Solenoid (wire to pin 105 inside the ECU)

Notes: SR20VE Pin 105 runs to VCT solenoid as negative trigger

SR20VE using B13/S13 SR20DE ECU

PIN102 - Canister Purge Solenoid (wire to pin 105 inside the ECU)

Notes: SR20VE Pin 105 runs to VCT solenoid as negative trigger

SR20VE using B14 SR20DE ECU

PIN103 - EGR Canister Purge Solenoid (wire EGR solenoid lines in engine bay to SR20VE VCT solenoid)

Notes: SR20VE VCT Pin works as negative trigger

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IMPORTANT INFORMATION

Nistune Developments has performed necessary measures to ensure that the Nistune software and boards are built to high standards. However Nistune
Developments will not be held responsible for any damages which may arise from the use or misuse of this product. By using this product you agree to the
following terms:

IMPORTANT - READ CAREFULLY: This License Agreement is a legal agreement between you and Nistune Developments for the software product Nistune. The
software product includes computer software, the media belonging to it, printed materials and electronic documentation. With installing, copying or any other
use of this software product, you agree to the terms of this agreement. If you do not agree to the terms of this agreement, you are not allowed to use or copy
this software product. Further you are required to remove the software product from your computer.

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You are granted a license as a single user of this software. You are allowed to install and use this software freely. However you may not install this software for
another user and may only make a single backup. The software may be installed on multiple machines belonging to the single user whilst those machines remain
property of that single user. Regardless of other rights, the author of the software product is allowed to terminate this license agreement if you offend against
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