Yamaha 2016 Grizzly yf700gg, Service Manual

Page: 387 / 474

FUEL INJECTION SYSTEM
9-32
When an abnormal signal is received from a sensor, the ECU processes the specified values that are
programmed for each sensor in order to provide the engine with alternate operating instructions that
enable the engine to continue to operate or stop operating, depending on the conditions.
EBS30279
TROUBLESHOOTING METHOD
The engine operation is not normal and the engine trouble warning light comes on.
1. Check:
• Fault code number
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼▼ ▼▼ ▼
a. Check the fault code number displayed on the meter or Yamaha diagnostic tool.
b. Identify the faulty system with the fault code.
c. Identify the probable cause of the malfunction.
▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲ ▲▲▲ ▲
2. Check and repair the probable cause of malfunction.
3. Perform the reinstatement action for the fuel injection system.
Refer to “Confirmation of service completion” of table in “TROUBLESHOOTING DETAILS (FUEL
INJECTION SYSTEM)” on page 9-35.
4. Turn the main switch to “ ” (off) and back to “ ” (on), then check that no fault code number is dis-
played.
TIP
If another fault code are displayed, repeat steps (1) to (4) until no fault code number is displayed.
5. Erase the malfunction history in the diagnostic mode (code No. 62). Refer to “SELF-DIAGNOSTIC
FUNCTION AND DIAGNOSTIC CODE TABLE” on page 10-7.
TIP
Turning the main switch to “ ” (off) will not erase the malfunction history.
The engine operation is not normal, but the engine trouble warning light does not come on.
1. Check the operation of the following sensors and actuators in the diagnostic mode.
Refer to “TROUBLESHOOTING DETAILS (FUEL INJECTION SYSTEM)” on page 9-35 and “SELF-
DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE” on page 10-7.
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.
EBS30280
YAMAHA DIAGNOSTIC TOOL
This model uses the Yamaha diagnostic tool to identify malfunctions.
Fault code No. No fault code No.
Check and repair. Refer to “TROUBLESHOOTING
DETAILS (FUEL INJECTION SYSTEM)” on page
9-35.
Monitor the operation of the sensors and actuators in
the diagnostic mode. Refer to “TROUBLESHOOT-
ING DETAILS (FUEL INJECTION SYSTEM)” on
page 9-35 and “SELF-DIAGNOSTIC FUNCTION
AND DIAGNOSTIC CODE TABLE” on page 10-7. Check and repair.
01: Throttle position sensor signal (throttle angle)
30: Ignition coil
36: Fuel injector
48: Air induction system solenoid