Diagnostic Mode - Yamaha XV19SX(C) Service Manual

5. Erase the malfunction history in the diagnos-
tic mode. Refer to "Sensor operation table
(Diagnostic code No. 62)".
NOTE:
Turning the main switch to "OFF" will not erase
the malfunction history.
EAS27420

DIAGNOSTIC MODE

Setting the diagnostic mode
1. Turn the main switch to "OFF" and set the engine stop switch to "
2. Disconnect the wire harness coupler from the fuel pump.
3. Press and hold the "RESET" switch, turn the main switch to "ON", and continue to press the switch
for 8 seconds or more.
NOTE:
• All displays on the meter disappear except the clock and odometer/trip meter/fuel reserve trip
meter/clock displays.
• "dIAG" appears on the odometer/trip meter/fuel reserve trip meter/clock LCD.
4. Simultaneously press the "SELECT" and "RESET" switches for 2 seconds or more to activate the
diagnostic mode. The diagnostic code number "d01" appears on the clock LCD.
5. Set the engine stop switch to "
6. Select the diagnostic code number corresponding to the fault code number by pressing the "SE-
LECT" and "RESET" switches.
NOTE:
• To decrease the selected diagnostic code number, press the "RESET" switch. Press the "RESET"
switch for 1 second or longer to automatically decrease the diagnostic code numbers.
• To increase the selected diagnostic code number, press the "SELECT" switch. Press the "SELECT"
switch for 1 second or longer to automatically increase the diagnostic code numbers.
The engine operation is not normal but the
engine trouble warning light does not come
on.
1. Check the operation of following sensors and
actuators in the Diagnostic mode. Refer to
"Sensor operation table" and "Actuator oper-
ation table".
01: Throttle position sensor (throttle angle)
30: Cylinder-#1 ignition coil
31: Cylinder-#2 ignition coil
32: Cylinder-#1 ignition coil
33: Cylinder-#2 ignition coil
36: Injector #1
37: Injector #2
If a malfunction is detected in the sensors or
actuators, repair or replace all faulty parts.
If no malfunction is detected in the sensors
and actuators, check and repair inner parts of
the engine.
"RESET"
"SELECT"
".
7-33
FUEL INJECTION SYSTEM
".