AEM 30-3532 GM LS 24x Engines Layover User Manual

WARNING:

!

This installation is not for the electronic novice or the PC illiterate!
Use this system with EXTREME caution! If you are not well versed
in electronics and vehicle instrumentation or are not PC literate,
please do not attempt the installation. Refer the installation to an
AEM trained tuning shop. A list of AEM trained tuning shops is
available at www.aemelectronics.com/dealer_locator.php or by
calling 800-423-0046. You should also visit the AEM Performance
Electronics Forum at http://www.aemelectronics.com.

NOTE: AEM holds no responsibility for any engine damage that
results from the misuse of this product!

Instruction Manual

Infinity Layover Harness

GM LS Engines 24x

This product is legal in California for racing vehicles only and should never be used on public highways.

NOTE: All supplied AEM calibrations, Wizards and other tuning information are offered as potential starting points only. IT IS
THE RESPONSIBILITY OF THE ENGINE TUNER TO ULTIMATELY CONFIRM IF THE CALIBRATION IS SAFE FOR ITS
INTENDED USE. AEM holds no responsibility for any engine damage that results from the misuse or mistuning of this
product!

AEM Performance Electronics

2205 126th Street Unit A, Hawthorne, CA. 90250

Phone: [phone] Fax: [phone]

http://www.aemelectronics.com

Instruction Part Number: 10-3532

 2014 AEM Performance Electronics

Introduction

This Infinity Layover Harness was designed for the GM LS Engine 24x (manual transmission). The harness includes all
standard GM (or equivalent) connectors for direct plug-in fitment, and requires minimal wiring to complete the Power
Distribution Center (PDC) connections. The Infinity ECU is sold separately, and includes base configuration files for the
GM LS Engines 24x.

Overview

This Instruction Manual describes the harness layout, and provides instructions for installation of the harness on a vehicle.
All included connectors are listed in detail in the provided pinout. Also included are instructions for adding new circuits into
the Infinity connectors if additional sensors or outputs are desired. Please read the entire Instruction Manual prior to
beginning the installation.

Included Items

Connectors

 Infinity C1 and C2
 8 injectors
 2 coil pack connectors, Bank-1 and Bank-2
 Oil Pressure sensor
 Crank Position Sensor
 Cam Position Sensor
 Knock connector (supports 2 sensors)
 Alternator, 1-wire
 Cable Throttle Body
 Idle Air Control Valve, 4-wire stepper
 UEGO Wideband 02 sensors, Bank-1 and Bank-2
 Mass Air Flow sensor
 Intake Air Temperature sensor
 Engine Coolant Temperature sensor
 Manifold Absolute Pressure sensor
 Vehicle Speed Sensor
 Reverse Lockout Solenoid
 Cylinder head grounds, Bank-1 and Bank-2
 AEMnet

Power Distribution Center

 Bussmann Relay/Fuse Box with flying leads

Relays/Fuses

 Relay, ISO 280 Micro Relay 35A/12V (5 ea)
 Fuse, Mini ATM 30A (4 ea)
 Fuse, Mini ATM 20A (1 ea)
 Fuse, Mini ATM 10A (1 ea)
 Fuse, Mini ATM 5A (4 ea)

Rev A, 2013/02/05

Power Distribution Center

Included in the harness is a Bussmann Power Distribution Center (PDC), pre-populated with the required relays and fuses
for correct operation of the harness. The PDC comes with a bundle of flying leads that need to be properly wired as part of
the installation. Flying leads include switched ignition, battery power and ground, and switched power to Fuel Pump and
Coolant Fans 1 & 2.

Connector Labels

All connectors come labeled to assure proper installation and reduce setup time.

Rev A, 2013/02/05

Downloadable Files

The Quickstart Guide and Layover Harness Instruction Manual can be downloaded from www.aemelectronics.com. These
documents are available for download here: www.aemelectronics.com/engine-management-systems-9/infinity-8-10-12-

stand-alone-programmable-ems-90/infinitytuner-software-and-instruction-downloads-92/

Configuration files can be downloaded from www.aeminfinity.com/. An experienced tuner must be available to configure
and manipulate the data before driving can commence

Downloadable files for GM LS Engines 24x

 GM_LSX_Supported_Application_v92-20130718RevA.pdf
 GM_LSX_24X_Infinity_Layover_Harness_RevA.pdf
 7100-XXXX-62 INF-10 Universal v95
 7101-XXXX-63 INF-8 Universal v95

Options

30-2001 UEGO Wideband O2 Sensor
Bosch LSU4.2 Wideband O2 Sensor that connects to AEM 30-3600 UEGO Wideband O2 Sensor Extension Harness

30-3600 UEGO Wideband O2 Sensor Extension Harness
Extension harness to connect AEM UEGO Wideband O2 sensor to 6 pin Deutsch

Cable Throttle Body

The GM LS Engines 24x layover harness is designed for use with a cable throttle body and 4-wire stepper IACV.
However, the Infinity ECU does support up to 2 Drive-By-Wire throttle bodies. Additional wiring can be added into the
Infinity connectors to support Drive-By-Wire throttle bodies if desired. Refer to the included pinout for proper pin numbers.

Drive-By-Wire throttle bodies incorporate idle control into the main throttle body, eliminating the need for a separate Idle
Air Control Valve. If converting to Drive-By-Wire, move the IACV connector branch to a safe location and secure with an
automotive grade tie wrap.

Wideband 02 Sensors

AFR1 (UEGO Sensor Bank 1) and AFR2 (UEGO Sensor Bank 2) plugs are for connecting UEGO wideband Bosch
LSU4.2 sensors (AEM 30-2001) models only. The UEGO extension harness (AEM 30-3600) mates with the layover
harness to the sensor (1 required for each sensor used). Use of any other type of wideband sensor can damage the
sensor and/or the Infinity ECU.

AEMnet

AEMNet is an open architecture based on CAN 2.0 which provides the ability for multiple enabled devices, such as
dashboards, data loggers, etc. to easily communicate with one another through two twisted cables (CAN+/CAN-).

Rev A, 2013/02/05

Installation Notes

Wiring Conventions and EMI

The GM LS Engines 24x layover harness comes pre-wired with all connectors, fuses, and relays needed to operate an
engine. However, the PDC does require extension/termination of the flying leads to their appropriate devices, and
additional sensors and other devices can be wired into the harness as needed for the specific application. The following
guidelines should be adhered to while completing the required wiring.

A proper wiring job includes proper termination of the wire at the sensor. The wire terminal end must be moisture tight
where it plugs into the sensor and it must have strong, electrically sound terminals. The preferred method of securing a
wire to a terminal is to use a crimp terminal with NO solder. It is important to use the proper crimping tool for sound
terminal construction. Plastic terminal plugs must have moisture tight seals. Inspect each plug to make sure the seals are
in place. Di-electric grease can be added in the terminal slots to further aid in corrosion resistance.

If a splice into a wire must be made and no solder-less terminals are available, then you must properly solder the splice.
Noise can be a serious problem and can cause intermittent misfiring of the engine. Every precaution should be taken to

prevent interference to the ECU’s operation. Resistive plug leads are REQUIRED. The GM LS Engines 24X Layover
Harness comes with shielded cables for the cam and crank position sensors. These wires have shield grounds that are
grounded at the Infinity ECU plug. They are NOT grounded at the sensor end of the cable. Attempting to ground both
ends of the cable will cause a condition called ground looping and will remove any noise protection the cable has.

To eliminate or reduce the chance of EMI, wires that carry high current must run in twisted pairs. An example of this would
be the power leads from a multiple spark ignition system. These ignition systems can carry up to 100 amps for a couple
milliseconds at the time of discharge, which induces a strong magnetic field in close proximity of the wires.

The routing of the wire loom is critical to EFI system performance and safety. The following safety considerations should
be made when installing the wire loom:

 Heat protection: the loom should be placed away from or insulated from sources of heat. The obvious item(s) that

should be avoided are the exhaust manifolds, EGR delivery tubes, and turbochargers. If it is absolutely necessary
to route a wire in close proximity to any of these items, then a suitable insulator must be used.

 Noise suppression: do not route wires near the HT leads. For coil-on-plug ignition systems this is not as critical.
 Moving component protection: route wires away from moving components such as fans, the blower belt, or the

throttle linkage. Also, make sure the wires are not under any strain when the engine is at full deflection on the
motor mounts.

 Never have the wires in exposed bundles throughout the engine compartment.

Determining ECU Location

 It is recommended that the ECU be placed in an environment that does not expose it to temperatures above 85°

Celsius (160F).

 In cases where the Infinity is to be used in place of the stock ECU, the location that the stock ECU occupied is

suitable.

 On applications where the ECU is to be located in a different position than stock, the interior of the vehicle is best.
 The Infinity should be located in a place that reduces the length of extension wires from the PDC while

maintaining an environmentally sound location.

 The ECU location must permit the PDC to be mounted in a serviceable location.

Power Distribution Center

The PDC contains all of the Relays and Fuses for the entire harness, and should be mounted in a location which permits
serviceability. Ideally the PDC should be located in the passenger compartment, or if necessary within the engine
compartment as far away from heat sources as can be achieved.

The PDC contains the flying lead bundle which must be wired to the battery, fuel pump and radiator fan(s), and switched
ignition. Routing of this flying lead bundle should also be taken into account when determining the mounting location of
the PDC.

Rev A, 2013/02/05

Required Wiring

The GM LS Engines 24x Layover Harness comes with a flying lead bundle wired into the PDC. Each of the flying leads
needs to be wired to an appropriate device, or sealed and tied wrapped if not used.

Power and Ground

 The Infinity must have an electrically secure ground connection, which means that the battery negative must be

properly grounded to the battery AND the cylinder head grounds muse be properly grounded to the engine. The
ground wires must have perfect electrical conductivity, which means that there must not be any paint or rust under
the wire terminals.

 The Battery Negative (10AWG BLK) and Battery Positive (10AWG RED) wires must be extended long enough to

reach the battery without having excess length. A 10AWG or larger gauge wires must be used to make the
extensions.

 The 3 Battery Positive (14AWG RED) wires supply power to 3 relays:

1. FPump

2. RadFan1

3. RadFan2
Each 14AWG wire can be extended with a 14AWG or larger gauge wire and connected directly to the battery
positive. Alternatively, the 3 wires can be spliced together with a large enough gauge wire to support the
amperage load of all three devices combined. The amperage load of your Radiator Fans and Fuel Pump is
unique, and the wire gauge selected for your splice must be calculated correctly. Large voltage drops, burned
wire insulation, and fire can occur from using too small of a gauge wire. Reference an American Wire Gauge table
for more details on amperage ratings.

 To prevent rust build up, we recommend applying a protective layer of dielectric grease, such as Standard Ignition

SL-4, to the bare metal surface.

Fuel Pump

Run this wire to the fuel pump positive terminal. This wire provides fused/switched power to the fuel pump. A separate
ground wire needs to connect the fuel pump negative terminal to chassis/battery ground.

Radiator Fan 1 Positive

Run this wire to the Radiator Fan 1 positive terminal. This wire provides fused/switched power to the radiator fan. A
separate ground wire needs to connect the radiator fan negative terminal to chassis/battery ground.

Radiator Fan 2 Positive

Run this wire to the Radiator Fan 2 positive terminal. This wire provides fused/switched power to the radiator fan. A
separate ground wire needs to connect the radiator fan negative terminal to chassis/battery ground.

Rev A, 2013/02/05

Switched Ignition 12V

The Switched Ignition flying lead (PNK-WHT) must be connected to the output on the ignition switch that supplies 12V
when the switch is in the Start and Run position. The ignition switch output should be isolated, meaning that it is dedicated
to the PNK-WHT wire, and should NOT supply switched ignition power to any other device.

Perm 12V

The Perm 12V/Fused 5A PNK flying lead can be used to power the ignition switch if the switch does not already have a
12V source wired to it.

Tacho Output

The Tacho Output (20AWG ORN-WHT) transmits a 0-12V pulse signal. The Tacho Output can be configured in the
Infinity Tuner Wizard to transmit the desired pulses per engine revolution in order to match the installed tachometer.

INFINITY CONNECTORS

The AEM Infinity EMS uses the MX123 Sealed Connection System from Molex.
Refer to the 10-7100 for EMS 30-7100 Infinity Quick Start Guide for details on
connector assembly and handling.

AEM strongly recommends that users become familiar with the proper tools and
procedures before attempting any modifications. The entire user manual can be
downloaded direct from Molex at:

http://www.molex.com/mx_upload/family//MX123UserManual.pdf

Rev A, 2013/02/05