Exhaust gas temperature sensor – AEM 30-3510 Infinity Plug & Play Harnesses - BMW 2001-2006 E46 M3 User Manual

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2001–2006 BMW E46 M3

Available I/O

Typical Use

Notes

Component

Wiring

Radiator Fan 1

Can be used to operate an
auxiliary fan for a radiator,
intercooler, etc.

This low side (ground)
output can be used for
other functions as w ell.
If attempting to drive a
component over 4amps,
a relay must be used.

The Infinity can
directly drive an
electronic
component up to
4amps max.

For a relay, this
should be w ired to
terminal 85 (or 86).
Supply 12V to the
opposite terminal 86
(or 85). If directly
driving a low current
component, w ire this
to the ground terminal.

No Lift Shift

Trigger

Cutting fuel and/or cutting
spark and/or retarding
ignition timing w hen shifting
gears w ithout releasing the
throttle pedal.

Cut time is typically 200-
300mS. Ignition retard is
typically 20degree w ith
a 50mS ramp-in time
after the fuel cut.
Ignition cut is not
commonly used.

AEM 12 Position
Universal Trim Pot
(or typical
potentiometer). Can
also be used w ith
any simple ON/OFF
sw itch.

This w ire should be
routed to the signal
output of the
component. If used
w ith a simple ON/OFF
sw itch, route the
opposite terminal to an
Infinity sensor ground.

EXHAUST GAS TEMPERATURE SENSOR

The BMW M3 S54 engine uses an exhaust gas temperature sensor (EGT). This is a 0

–

5V resistive

temperature device (RTD) that is input to the Infinity EMS. AEM has already done the work by calibrating
and entering the EGT data (shown below) into the base session files. There is currently no fuel control,
but this channel can be data logged for tuning purposes.