Radium EMS Instruction Manual - 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 select switch.
Common uses are race gas switch and/or high boost
switch. It can be used for other miscellaneous I/O.
3
High Speed Fan Relay
Output
Preset to activate the factory Lotus fast speed radiator
fan.
4
Slow Speed Fan Relay
Output
Preset to activate the factory Lotus slow speed
radiator fan.
5
VVTi Solenoid
Output
Preset to control the Toyota variable valve timing
solenoid on the intake camshaft.
6
Air Box Valve (or Aux Relay)
Output
Preset to open the Lotus air box valve. It is also used
to drive the relay in the optional auxiliary harness. It
can do both but will be limited to one software
activation condition, so many unplug the air box valve.
7
Boost Control Solenoid
Output
Preset to control a turbo boost solenoid in the optional
aux harness. It can be used for other misc I/O.
8
Traction Control Switch
Input
Preset for the optional Radium traction control switch.
It can be used for other miscellaneous I/O.
The table below is the pinout sheet for the optional Radium auxiliary harness 12-pin Deutsch connector.
Deutsch
Description
Auxiliary Harness 12-pin Connector Notes
1
Boost Control Power
12V switched power to the 2-pin turbo boost solenoid connector.
Note: The turbo boost solenoid does not require polarity.
2
Boost Control Output
PWM ground to the 2-pin turbo boost solenoid connector. Note: The
turbo boost solenoid does not require polarity.
3
---
Not used
4
O2 Sensor Signal
Short flying lead that can be pulled from sleeving. Commonly used
as an aftermarket O2 sensor input. Note: The factory O2 sensor
MUST be disconnected to use this input!
5
IAT Sensor Signal
Connects to the 2-pin intake air temperature sensor connector. Note:
The intake air temperature sensor does not require polarity.
6
Sensor Ground
Connects to the sensor ground terminal on the 3-pin MAP (manifold
absolute pressure) sensor connector as well as the 2-pin intake air
temperature sensor connector.
7
MAP Sensor Signal
Connects to the signal wire terminal on the 3-pin MAP sensor
connector. Note: The factory MAF (mass air flow) sensor MUST be
disconnected to use this input!
8
5V Sensor Reference
Connects to the power wire terminal on the 3-pin MAP (manifold
absolute pressure) sensor connector.
9
---
Not used
10
Relay Trigger -
EMS GPIO#6 output that triggers the integrated aux relay ON/OFF.
Note: If still plugged in, the Lotus air box valve will also activate
(open) according to the GPIO#6 software conditions.
11
Sensor Ground
Short flying lead with no termination that can be pulled out from
sleeving. Use for aftermarket wideband O2 sensor controllers that
require an extra analog sensor ground.
12
Relay Trigger +
Connects to the integrated auxiliary relay. This is a 12V switched
power wire for the relay's coil.