Diagnostic Mode - Yamaha Grizzly550 User Manual

5. Erase the malfunction history in the diagnos-
tic mode. Refer to "Sensor operation table (di-
agnostic code No.d62)".
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".
d01: Throttle position sensor (throttle angle)
d30: Ignition coil
d36: Injector
EAS27441

DIAGNOSTIC MODE

It is possible to monitor the sensor output data or check the activation of actuators without connecting
the measurement equipment by simply switching the meter indication from the normal mode to the di-
agnostic monitoring mode.
Setting the diagnostic mode
1. Set the main switch to "OFF" and set the engine stop switch to "OFF".
2. Disconnect the wire harness coupler from the fuel pump.
3. Simultaneously press and hold the "SELECT" and "RESET" buttons, turn the main switch to "ON",
and continue to press the buttons for 8 seconds or more.
TIP
• All elements on the meter disappear.
• "dIAG" appears on the multifunction meter.
4. Simultaneously press the "SELECT" and "RESET" buttons for 2 seconds or more to execute the se-
lection.
5. Select the diagnostic code number that applies to the item that was verified with the fault code num-
ber by pressing the "SELECT" or "RESET" buttons.
TIP
The diagnostic code number appears on the multifunction meter (d01–d70).
• To decrease the selected diagnostic code number, press the "RESET" button. Press the "RESET"
button for 1 second or longer to automatically decrease the diagnostic code numbers.
• To increase the selected diagnostic code number, press the "SELECT" button. Press the "SELECT"
button for 1 second or longer to automatically increase the diagnostic code numbers.
"SELECT"
"RESET"
9-36
FUEL INJECTION SYSTEM
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.
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