Chevrolet Performance 19328839 Manual Del Usuario página 8

Attach a 12 volt ignition switch feed from the vehicle to the pink ignition switch wire in the harness (this is required to enable
the proper power-up sequence of the ECM). This can be routed into the passenger compartment with the accelerator pedal
connector and diagnostic link connector. Next, connect battery power (minimum 8 gauge wire) to the horizontal stud on the fuse
relay center the other two studs are for accessories and are 50 amp fused), and the harness installation is complete.
Additional features and bulkhead connector descriptions are also included below:
System Features
• The Fuse/Relay center contains all required fuses and relays for proper engine operation. Spare fuse and relay openings are
provided for customer's possible future use.
• The Fuse/Relay center includes a malfunction indicator light (MIL) which will illuminate in the event of an engine fault code. See
your Chevrolet Performance dealer to have this code retrieved at the diagnostic link connector in the fuse/relay center. Codes
can also be retrieved using an aftermarket diagnostic scan tool capable of reading this configuration. Note that the MIL will
illuminate when the vehicle is keyed-up - this is normal, and it will go out once the engine is started if there are no current fault
codes. A redundant MIL wire is included in the wiring harness to allow a light to mount inside the passenger compartment. The
wire is located in the wire bundle near the pedal connector and the ignition voltage.
• Two cooling fans are controlled by the ECM. Control is set to turn on one 12 V fan at 103 Deg C (217 Deg F) coolant
temperature and the second fan at 113 Deg C (235 Deg F). The fan control wires are fused/relayed and can be connected
directly to your fans.
• The fuel pump is controlled by the FPPM. The control wires supply a pulse width modulated (PWM) 12 V and should connect
directly to the fuel pump.
• A tachometer signal is included in the bulkhead connector (see below). This is a 4 pulse/rev output which may correspond
to an 8-cylinder setup in some tachometers or transmission controllers. Note the signal is a low voltage square wave, some
tachometers or transmission controllers may need a pull-up resistor in order to read the signal, similar to a 5000 ohm, ¼ watt
resistor– this detail is left to the user. The following circuit has worked for numerous devices – the resister value may need to be
changed if your device does not read this output properly.
NOTE: When connected to the CHEVROLET PERFORMANCE Supermatic Connect and Cruise Harness the pull up resister is
not required for the Transmission Controller.
• A vehicle speed output is included in the bulkhead connector for use with auto-scaling speedometers. The vehicle speed sensor
connector in the harness must be attached to a digital type speed sensor for this to function.
LTG Crate Engine Controls System
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
Bulkhead Connector Pin C
Engine Speed - Tach Out
Bulkhead Connector Pin L
Ignition Voltage
19328840
REV 03JA17
PART NO.
DATE
01DE14 Initial Release - William Duncan
03JA17 Revision - Blake Nye
Pull High Tach Out
SHEET
REVISION
8 38
OF
AUTH
N/A
N/A