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Radium
Engine
EMS
Instruction Manual

Radium EMS Instruction Manual - 3. Before Getting Started

Manual is about: Engineering Plug and Play Engine Management System PLUG AND PLAY EMS KIT LOTUS ELISE/EXIGE/2-ELEVEN 2004+ with 2ZZ-GE ENGINE

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3. BEFORE GETTING STARTED

For installations that are using a Radium Turbocharger

kit, the rear clamshell should ideally be removed to gain

easy access for installation (running wires, vacuum lines,

etc). Radium sells clamshell kits that help make this

process easier. For installations in naturally aspirated or

factory supercharged vehicles, clam shell removal is not

necessary but will help speed the installation.

Alternatively, for naturally aspirated vehicles, simply

removing the deck lid (or hatch) will allow access to the

critical areas for the plug and play installation.

Familiarize yourself with the location of engine control related components. If installing gauges, a

mounting location must be determined. Access to the area behind the LH seat is required for the EMS

installation. Removal of the speaker panel is necessary.

The following components are included in the basic Radium Lotus EMS kit:

JUMPER BOX

All Lotus EMS kits use a Radium jumper box (shown on

right). The jumper box consists of a conformal coated

printed circuit board and a billet aluminum enclosure.

The factory Lotus ECU connectors plug into this unit

making the kit plug and play. The included main harness

plugs into the other side of the jumper box. This unit

always mounts in the engine bay. However, depending

on the model year of the Lotus, this jumper box may

mount as such or 180 degrees rotated. The jumper box’s

connector header that matches the engine harness’

connectors will always face downwards.

RADIUM/AEM EMS-4

The circuitry of the AEM EMS-4 included in the kit has

been modified by Radium Engineering to make it

compatible with the Lotus electronics. Do not replace the

Radium EMS with a standard off-the-shelf AEM EMS-4

that does not have a Radium sticker. Contact Radium

Engineering should a replacement be needed.

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Summary of EMS

Page 2: Table of Contents
Table of contents 1. Introduction 2. Warnings and cautions 3. Before getting started 4. 2004-2005 ems mounting 5. 2006+ ems mounting 6. Installation of accessories 7. Before initial start-up 8. Engine tuning 9. Tables and pinouts.
Page 3: 1. Introduction
1. Introduction the radium engineering plug and play engine management system (ems) gives the user complete control over all engine parameters and also adds extra functionality for modified vehicles. The radium ems itself is a highly modified aem ems-4. The stock ecu is retained to run the can-bus d...
Page 4: 3. Before Getting Started
3. Before getting started for installations that are using a radium turbocharger kit, the rear clamshell should ideally be removed to gain easy access for installation (running wires, vacuum lines, etc). Radium sells clamshell kits that help make this process easier. For installations in naturally a...
Page 5
Main wiring harness the model specific main wiring harness is included and links the jumper box to all other components in the system including the radium ems. This harness is custom engineered for the lotus application by radium engineering and makes installation plug and play. Radium main harness,...
Page 6
Lotus ecu connectors the ecu connectors used on the 2004-2005 lotus models are different than the 2006+ ecu connectors. Understanding how both of these connectors work will make installation easier. Experiment with these connectors and the radium jumper box to see how they work before the system is ...
Page 7
4. 2004-2005 ems system mounting follow the instructions below if installing the radium plug and play ems kit on a 2004-2005 lotus with a cable actuated throttle body. 1. Disconnect battery negative cable. 2. Locate the factory engine control unit (ecu) on the firewall, near the engine intake manifo...
Page 8
6. Plug the factory ecu connectors into the radium jumper box’s lower ecu header. Make sure the slide locks are in the unlocked position as the connector is inserted into the header. Once inserted and seated, slide the lock closed and the connector will fully engage into the ecu header. Do this for ...
Page 9
7. Use the included m6x1x12mm allen screw with m6 washer and the m8x1.25x16mm hex screw with m8 washer to mount the radium jumper box to the hex standoffs from step 5. 8. On the radium main harness, locate the two ecu connectors similar to what is shown in the picture. Plug these into the top two he...
Page 10
9. Engine side of the main harness installed. 10. Remove the air intake system and drill out the six rivets holding the air box bracket to the bulkhead wall. Four rivets are located on the vertical face (shown) and two are located on the top face hidden by the carpet. Insert the included m5 button h...
Page 11
11. To remove the rear speaker panel, it is required to remove the passenger seat and slide the driver seat forward. Gently pull and unstick the immobilizer control unit from the bulkhead wall, as shown. Using the included hook and loop tape (velcro), relocate the immobilizer to another spot out of ...
Page 12
13. Feed the radium main wiring harness through the factory bulkhead wall hole and into the cabin. Start with the ems connector first then carefully feed the other leads through the hole. Once the harness is fed through, snap the grommet back into the hole. Some trimming may be necessary to make roo...
Page 13
15. Slide the ems bracket behind the roll bar and align the four holes to the drilled holes from the earlier step. Screw the four button head allen screws from step 10 into the four rivet nuts in the bracket and tighten. The ems system is now installed. If you purchased the auxiliary harness, contin...
Page 14
5. 2006+ ems system mounting follow the instructions below if you are installing the radium plug and play ems kit on a 2006+ lotus with electronic throttle control. 1. Disconnect battery negative cable 2. Remove the speaker panel behind the seats on the interior of the car. 3. Remove the air intake ...
Page 15
7. Use the factory m6 nuts and secure the jumper box to the bulkhead wall. 6. Locate the ecu connectors removed in step 4 and plug them into the radium ecu jumper box. Fully lock the latches in the connectors. Place the ecu jumper box onto the mounting studs on the bulkhead wall..
Page 16
9. Drill out the rivets on the air box mounting bracket. Four rivets are located on the vertical face (shown) and two are located on the top face hidden by the carpet. 8. Using the ecu mounting bracket included in the radium ems kit, mount the radium ems using the 3 long included screws. Use 4 of th...
Page 17
10. Place the ems bracket into the cavity behind the lh roll bar support on the interior of the vehicle. Line up the four holes around the ra logo with the four drilled out rivet holes from step 9. Insert the included m5 screws from the engine bay side and tighten down. 11. Unsnap the grommet from t...
Page 18
12. Locate the radium main ecu harness and find the end with the 2005 style ecu connectors. Feed this end through the bulkhead wall pass-through first. Start with the largest connector. 13. From the engine bay side, gently tug and ease the harness through the hole. Next, work the second (smaller) 20...
Page 19
14. Keep feeding the harness through until the lead for the 12-pin auxiliary harness is fully in the engine bay. 15. Make sure the two 2005-style connectors are in the unlock position and plug them into the top side of the jumper box. Make sure connectors are fully engaged and slide-locks are closed...
Page 20
16. Inside the cabin, plug the large connector into the ems as shown. 17. Plug the other two stock ecu connectors into the stock ecu. Make sure the latches fully close and lock the connectors in place. Plug the remaining connector into the relay mounted to the bracket (not shown). The ems system is ...
Page 21
6. Installation of accessories the radium plug and play ems system has an optional auxiliary harness that makes it easy to hook up extra equipment to be controlled by the ems. Wideband oxygen sensor with gauge/controller if an aftermarket o2 sensor is used, the factory o2 sensor must be unplugged fo...
Page 22
Map (manifold absolute pressure) sensor if a map sensor is used, the factory maf sensor must be unplugged for proper operation. For exige-s and 2- eleven applications, the radium ems kit can use the factory tmap sensor. If looking to convert to speed density for all other applications, the optional ...
Page 23
Spare output in the standard ems kit, the output gpio#6 is used to activate the lotus air box valve which is used to increase induction sound at high engine speeds. If the optional auxiliary harness was purchased, an integrated fuse and relay comes prewired and can be used for just about anything. T...
Page 24: 8. Engine Tuning
7. Before initial start-up be sure that the vehicle is in the hands of an authorized factory trained aem tuner. Connect to the radium ems using a laptop and usb cable in the main ems harness. For more detailed information vehicle setup, visit the aem electronics forum at forum.Aempower.Com/forum/ind...
Page 25: 10. Tables And Pinouts
10. Tables and pinouts the table below illustrates the aem general purpose input/output that is preset in the radium ems kit. Gpio name i/o notes 1 vvl solenoid output preset to activate the toyota variable valve lift solenoid. 2 power selector switch input preset for the optional radium power selec...
Page 26
Shown below are the 04-05 lotus 2zz-ge ecu pinout chart and pin numbering for the 04-05 ecu header. Pin 2004-2005 lotus 2zz-ge pin 2004-2005 lotus 2zz-ge 1 pre o2 sensor heater ground 53 ac control module compressor relay 2 chassis ground 54 main relay 3 post o2 sensor signal 55 vap pressure/fuel ta...
Page 27
Shown below are the 2006+ lotus 2zz-ge ecu pinout chart and pin numbering for the 06+ ecu header. Pin 2006+ brown (l) connector pin black (r) connector a 1 diagnostic connector can high a 1 tmap sensor temp signal (supercharged only) 2 tpms r1 (specific models only) 2 oil pressure switch 3 pre o2 se...