Diagnostic Mode - Yamaha Vmax VMX17C 2009 Service Manual

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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".
D:01: Throttle position sensor signal 1 (throt-
tle angle)
D:13: Throttle position sensor signal 2 (throt-
tle angle)
D:14: Accelerator position sensor signal 1
(throttle angle)
D:15: Accelerator position sensor signal 2
(throttle angle)
D:30: Cylinder-#1 ignition coil
D:31: Cylinder-#2 ignition coil
D:32: Cylinder-#3 ignition coil
D:33: Cylinder-#4 ignition coil
D:36: Injector #1
D:37: Injector #2
D:38: Injector #3
D:39: Injector #4
D:48: Air induction system solenoid
EAS27421

DIAGNOSTIC MODE

Setting the diagnostic mode
1. Turn the main 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 displays on the meter disappear except the odometer displays.
• "DIAG" appears on the odometer LCD.
4. Simultaneously press the "SELECT" and "RESET" buttons for 2 seconds or more to activate the di-
agnostic mode. The diagnostic code number "D:01" appears on the clock LCD.
5. Select the diagnostic code number corresponding to the fault code number by pressing the "SE-
LECT" and "RESET" buttons.
TIP
• 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.
"SELECT"
"RESET"
8-37
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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