XY Powersports XY500UTV, Service Manual

Page: 222 / 259

11. ELECTRIC SYSTEM
11-25
ELECTRONIC FUEL INJECTION SYSTEM
FAULT SELF-DIAGNOSIS
ECU CONTINUOUSLY MONITOR THE
SENSOR,ACTUATOR,RELEVENTCIRCUIT ,TROUBLE LAMP,BATTERY VOLTAGE
ETC,EVEN THE ECU ITSELF.ALSO THE SENSOR OUTPUT,ACTUATOR DRIVING
SIGNAL,INTERNAL SIGNAL(SUCH AS CLOSED-LOOP CONTROL COOLANT
TEMPERATURE,IDLING SPEED CONTROL,BATTERY VOLTAGE CONTROL ETC),DO THE
RELIABILITY MEASUREMENT. ONCE DISCOVER SOME WHERE BREAK DOWN,OR SOME
SIGNAL VALVE UNTRUSTED,THE ECU WILL IMMEDIATELY SET UP FAULT RECORD
INFORMATION IN RAM TROUBLE MEMORY.THE FAULT INFORMATION STORE AS
TROUBLE CODE,AND DISPLAY THE FAULT IN IT’S EMERGENCE SEQUENCE. THE
FAULT CANBE DIVIDED INTO TWO TYPES ¡°STEADY FAULT¡± AND RANDOM FAILURE
ACCORDING TO IT¡¯S EMERGENCE FREQUENCY(SUCH AS CAUSED BY BRIEF WIRE
TURNOFF OR BAD CONNECTION OF THE CONNECTOR.)
THROUGH DIAGNOSTIC EQUIPMENT AND THE TROUBLE LAMP YOU CAN FIND THE
TROUBLE PART QUICKLY.
ELECTRONIC FUEL INJECTION SYSTEM FAULT DIAGNOSIS MAINLY APPLY
DIAGNOSTIC EQUIPMENT.
DIAGNOSTIC EQUIPMENT:
THE RIGHT IS THE DIAGNOSTIC EQUIPMENT
OPERATION FUNCTIONS INDICATOR
DIAGRAM.SPECIFIC OPERATION AND IT’S
FUNCTIONS PLEASE REFERS TO THE
DIAGNOSTIC EQUIPMENT OPERATING
MANUAL.
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