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Screw

Name

Terminal #

PowerA

PowerB

GroundA

GroundB

GroundC

CANH

CANL

Pressure sensor

input

5[V] output

12[V] protected

output

For PowerA and PowerB each should be connected through the supplied fuse holders and 15A fuses. The best place to tap power is generally

after the ignition switch or any other source of power that is always "live" when the engine is running. If the Lambda sensor is in an active

exhaust stream and unpowered, carbon from an active exhaust can easily build up on an unpowered sensor and ruin it.

You can ground all the grounds to the same point.

For all Oxygen sensor installations the sensor must be installed before the catalytic converter.

For normally aspirated engines the sensor should be installed about 2ft from the engine exhaust port. For Turbocharged engines the sensor

should be installed about 3ft from the engine exhaust port after the turbocharger. For Supercharged engines the sensor should be installed 3ft

from the engine exhaust port

MegaSpartan User Manual, Release Date: Aug 22 2018

Connects to

12v

Ground

MegaSquirt CAN Bus

High

MegaSquirt CAN Bus

Low

Pressure Sensor

Output

Not currently used. This terminal is protected by; fuse, diode (reverse

polarity protection), and Transient Voltage Suppressor.

Lambda Sensor Installation

The Lambda Sensor should be installed between the 10 o'clock and the 2 o'clock position,

less than 60 degrees from vertical, this will allow gravity to remove water condensation

from the sensor.

Note

Use 15A fuse

Can connect all grounds to same point

Provides 5[V] power to pressure sensor