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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 (3 total) to the engine block,
ensuring the connections are clean and secure, and attach the fuel
pump wire from the fuse/relay center to the power side of the pump
(this feed is fused and relay-controlled from the ECM).
Make sure all intended engine and vehicle side connections
have been made before proceeding to connect power.
Attach a 12 volt ignition switch feed from the vehicle to the pink
Main Battery
Connection
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 possible future customer 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 using a
Tech2 with Chevrolet Performance (formally GM Performance
Parts) Diagnostics selection. 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 mounted
inside the passenger compartment. The wire is located in the
wire bundle near the pedal connector and the ignition voltage.
•
A cooling fan is controlled by the ECM. Control is set to turn on a
12 V fan at 95 Deg C (203 Deg F) coolant temperature. The fan
control wire is fused/relayed and must be connected directly to
your fan.
•
The fuel pump is controlled by the ECM. The control wire supplies
12 V and is fused/relayed and should connect to the 12 V side of
the fuel pump.
LSA Crate Engine Control 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.
Auxiliary Devices
— 50 amp fused
REV 27MY16
DATE
27MY16
•
A tachometer signal is included in the bulkhead connector
(see
below). This is a 2 pulse/rev output which may correspond
to a 4-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 resistor value may need to be
changed if your device does not read this output properly.
Bulkhead Connector
Pin C
Engine Speed – Tach Out
5000Ω
Bulkhead Connector
Pin L
Ignition Voltage
NOTE: When connected to the CP Supermatic Connect and
Cruise Harness the pull up resistor is not required for the
Transmission Controller.
•
An oil pressure output is included in the bulkhead connector
and can be used for a pressure gauge if desired (see below for
scaling). The oil pressure sensor is not required for the system
to operate properly. NOTE: If oil pressure sensor is being used,
ensure that oil pressure sensor p/n 12616646 is installed for
proper connection to the harness.
•
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
variable reluctance type speed sensor (typical of most late model
GM automatic transmissions) for this to function.
Bulkhead Connector Outputs
Bulkhead Connector
Load View or Rear View
Circuit #
Position
Wire Gauge
2501A
A
22
–
B
–
121
C
22
818
D
22
432B
E
22
–
F
–
2500A
G
22
331B
H
22
486B
J
22
40F
K
18
5292
L
18
50B
M
18
19260665
PART NO.
REVISION
Previous Revisions are Archived
Revision - Blake Nye
Pull High
Tach Out
Mating Connector
15326849 Connector
15326854 Connector
12191818 Female
15304701 Male Terminal
Terminal
15366021 Seal
15366021 Seal
15305171 Plug
15305171 Plug
15430903 TPA
15430903 TPA
15317832 CPA
Color
Description
Tan
GMLAN Low Speed (-)
Plug
empty
White
Engine Speed
Brown
Vehicle Speed - Out
Lt. Green
MAP Signal
Plug
empty
Tan/Black
GMLAN High Speed (+)
Tan/White
Oil Pressure Signal
Purple
Throttle Pos #2 (0.5v -
4.5v)
Orange
Battery Power Fuse
Pink
Ignition "On" Power
Black
Ground
4
23
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