Chevrolet Performance LT4 E-ROD Directives D'emploi page 15

Electrical Connections Required for Correct Operation
Mass Air Flow (MAF) Sensor – 5 pin Connector Electronic Throttle Control – 5 pin Connector
Manifold Absolute Pressure (MAP) Sensor – 3 pin Connector
Pre-Converter or Front Oxygen Sensors (2 total) – 4 pin Connectors Post –Converter or Rear Oxygen Sensors (2 total) – 4 pin Connectors Knock Sensors
(2 total) – 2 pin Connectors
Ignition Coils (8 total) – 4 pin Connectors Crankshaft Position Sensor – 3 pin Connector Accelerator Pedal Sensor – 6 pin Connector Ignition Switch Input
– 1 Wire
Fuel Pump Control - 2 Wires
Fuel Pump PWM Control and Shield – 3 wires Battery Power (Stud at Fuse/Relay Center) Cooling Fan Control – 2 Wires
Even Injector and High-Pressure Fuel Pump – 12 pin Connector Odd Injector and Rail Pressure – 12 pin Connector
Coolant Temperature and Oil Pressure – 10 pin Connector (part of Lifter Oil Manifold Assembly - LOMA - connector) Two Stage Oil Pump, Cam Position
and Cam Phaser – 8 pin Connector
Generator – 2 pin Connector ECM (3 total) – 73 pin Connector
Fuel Line Pressure Sensor – 3 pin Connector Fuel Pump Power Module – 16 pin Connector Vehicle Speed Sensor – 2 pin connector Canister Purge
Solenoid - 2 pin Connector Engine Grounds (4 total) Eyelets
Top of Travel Clutch Switch/Brake Switch – 2 wires
Optional Connections (Not required for operation)
Bulkhead – 12 pin Connector (12-way)
Note: Must be used if with the Connect & Cruise Automatic Trans Controller) MIL (Malfunction Indicator Lamp) wire
Assembly Line Diagnostic Link (ALDL) – 16 pin Connector
Connections
Connect all engine/vehicle-side connectors before connecting the harness to the ECM. All engine/vehicle-side connectors are functionally labeled,
reference a 2017 Camaro or later model year with a LT4 engine service manual if necessary to determine connection locations on engine.
Note: It may be easier to install the harness on the engine before installing the engine into the vehicle.
The harness includes a fuse/relay center containing all required fuses and relays, and also a 12-way bulkhead connector (with sealed mating connector)
which contains outputs that may be useful to the user (see 'Bulkhead Connector Outputs' section below). The fuse/relay center should be mounted as
high in the engine compartment as possible to avoid unnecessary splash and road debris. Likewise, keep the 12-way bulkhead connector and diagnostic
link connector (both connect from the fuse/relay center) as high and protected as possible.
The 3 ECM connectors are indexed to connect only in the correct locations. Install by pressing down firmly until the connector is seated, then pull the
top slider bar down until it snaps and locks into place. The bar should slide easily and will not move unless the connector is seated properly, do not use
excessive force.
Attach the harness ground eyelets (4 total) to the engine block using the 4 bolts provided, ensuring the connections are clean and secure, and attach
the fuel pump wire from the FPPM (Fuel Pump Power Module) to the power and ground side of the pump (this feed is fused and relay-controlled from
the ECM). Two ground eyelets should be attached under one bolt on the rear of the cylinder head.
For manual transmission applications, a pair of wires for the connection to a top of travel clutch switch have been provided. Not to be confused with
the bottom of travel clutch switch or neutral safety clutch switch which prevents starter engagement without fully depressing the clutch. The top of
travel clutch switch is used to briefly disable fuel when the clutch is depressed which helps decelerate the engine and makes upshifting easier and
quicker. A compatible clutch switch will have two pins to provide a closed circuit when the clutch pedal is fully released and an open circuit as soon as
the clutch pedal is partially depressed.
PART No. SHEET
LT4 E-ROD Instruction Sheet REV 04DE19
15 of 83
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