Briggs & Stratton BIG BLOCK EFI, Repair Manual

Page: 105 / 142

Section 4: Symptoms 101
ECM Connector J2 (Black)
Connector-
Pin Number
Function Wire Color
Possible Symptom
From Faulty Circuit
J2-01
IGN COIL CYL 1
Engine Spark Timing Coil Cylinder 1
Violet/Black
Rough idle, lack of power, stalling
J2-02
GROUND
Power
Black
An open ground or high resistance
ground may cause any or all symp-
toms
J2-03
K-LINE
Serial Data Diagnostic Communication
Pink
No diagnostic data
J2-04
CKP Hi
gh
23X
Black/White
No start
J2-05
FUEL INJ CYL 1
Fuel Injector Cylinder 1
Lt.Blue/Black
Rough idle, lack of power, stalling
J2-06
FUEL INJ CYL 2
Fuel Injector Cylinder 2
Lt. Blue/White
Rough idle, lack of power, stalling
J2-07
HO
2
S HEATER CONTROL
*
Oxygen Sensor Heater
White/Green
Lack of power, surge, rough idle,
exhaust odor
J2-08
MAT
Manifold Air Temperature Sensor
Tan/Black
Rough idle
J2-09
HIGH PRESSURE FUEL
PUMP MODULE
Fuel Pump
Blue/Yellow
No start
J2-10
5V RETURN
5 Volt Return
Brown
Lack of performance, stalling,
exhaust odor
J2-11
MAP
Manifold Absolute Pressure Sensor
White/Red
Poor performance, surge, poor fuel
economy, exhaust odor
J2-12
TPS
*
Throttle Position Sensor
Pink/Black
Rough idle
J2-13
CKP Low
23X
Green/White
No start
J2-14
EHT
Engine Head Temperature Sensor
Tan
Poor performance, exhaust odor,
rough idle
J2-15
IGN
Ignition
Red
No start, MIL inoperative
J2-16
5V REFERENCE
5 Volt Reference
Red/White
Lack of power, surge, rough idle,
exhaust odor
J2-17
HO
2
S SIGNAL
Oxygen Sensor Signal
Grey/Black
Lack of power, surge, rough idle,
exhaust odor
J2-18
VOLTAGE INPUT +12V
Voltage Battery
Red
No start
HOT AT ALL TIMES WITH BATTERY CONNECTED !!!
*
If Equipped
(See Table at Bottom of Page 11)