Ecm Connector Symptoms - Briggs & Stratton VANGUARD M490000 Repair Manual

4
Connector-
Pin Number
J1-01 IAC HIGH "A" *
Idle Air Control A High
J1-02 NOT USED
J1-03
MIL
Malfunction Indicator Lamp
J1-04 NOT USED
J1-05 NOT USED
J1-06 Tachometer
J1-07 CAN Low
Used only for ECM Development
J1-08 CAN High
Used only for ECM Development
J1-09 GROUND
Power
J1-10 IGN COIL CYL 2
Engine Spark Timing Coil Cylinder 2
J1-11 IAC LOW "A" *
Idle Air Control A Low
J1-12 IAC HIGH "B" *
Idle Air Control B High
J1-13 IAC LOW "B" *
Idle Air Control B Low
J1-14
Safety Interrupt Circuit
J1-15 NOT USED
J1-16 NOT USED
J1-17 MPR
Main Power Relay
J1-18 NOT USED
* If Equipped
104

ECM CONNECTOR SYMPTOMS

ECM Connector J1 (Grey)
Function Wire Color Possible Symptom(s) From Faulty Circuit
Blue/Brown
Orange/Black
Black/Red
Green
Yellow
Black
ground may cause any or all symptoms
Violet/White
Blue/Green
Blue/Grey
Blue/Red
Orange/White
Red An open B+ circuit or high resistance in the
B+ circuit may cause any or all symptoms
Rough, unstable, or incorrect idle
MIL inoperative
Tachometer inoperative
No Can Signal
No Can Signal
An open ground or high resistance
Rough idle, lack of power, stalling
Rough, unstable, or incorrect idle
Rough, unstable, or incorrect idle
Rough, unstable, or incorrect idle
No start