Diagnostic Mode - Yamaha YZF-R15 Service Manual

DIAGNOSTIC MODE

It is possible to monitor the sensor output data or check the activation of actuators with the FI diagnostic
tool connected to the vehicle and set to the normal mode or the diagnostic monitoring mode.
FI diagnostic tool
Setting the normal mode
NOTE:
The engine speed, coolant temperature, and fault code, if detected, can be displayed on the LCD of the
FI diagnostic tool when the tool is connected to the vehicle and is set to the normal mode.
1. Turn the main switch to "OFF".
2. Disconnect the self-diagnosis signal connector "1", and then connect the FI diagnostic tool "2" as
shown.
3. Turn the main switch to "ON" and start the engine.
NOTE:
• Coolant temperature and engine revolution appear on the LCD of the FI diagnostic tool.
• "POWER" LED (green) comes on.
• If a malfunction is detected in the system, "WARNING" LED (orange) comes on.
4. Stop the engine.
NOTE:
If a malfunction is detected in the system, the fault code appears on the LCD of the FI diagnostic tool.
And also, "WARNING" LED (orange) comes on.
Communication error with the FI diagnostic tool
LCD Display
Waiting for con- No signals are received
nection.... from the ECU.
Commands from the FI di-
ERROR 4 agnostic tool are not ac-
cepted by the ECU.
1
FI Diagnostic Tool
0rpm 66
S/D : 41
Symptom
• Improper connection in connecting lead.
• The main switch is "OFF" position.
• Malfunction in FI diagnostic tool.
• Malfunction in ECU.
• Turn the main switch to "OFF" once, and then
set the FI diagnostic tool to CO adjustment
mode or diagnostic mode.
• Vehicle battery is insufficiently charged.
• Malfunction in FI diagnostic tool.
• Malfunction in ECU.
8-35
FUEL INJECTION SYSTEM
2
ºC
Probable cause of malfunction