Latch Up Detected; Cylinder #1 Ignition Coil: Open Or Short Circuit Detected In The Primary Lead Of The Cylinder #1 Ignition Coil - Yamaha YZF-R25 Service Manual

Fault code No. 30
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 The vehicle has overturned.
2 Installed condition of lean angle
sensor.
3 Defective lean angle sensor.
4 Malfunction in ECU.
Fault code No. 33
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Actuation
Procedure
30

Latch up detected.

Unable to start engine
Unable to drive vehicle
08
Lean angle sensor output voltage
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Remove the lean angle sensor and incline it more than 45 degrees.
Maintenance job
Raise the vehicle upright.
Check the installed direction
and condition of the sensor.
Execute the diagnostic mode.
(Code No. 08)
Upright: 0.4–1.4 V
Overturn: 3.7–4.4 V
Replace if defective.
Refer to "CHECKING THE
LEAN ANGLE SENSOR" on
page 8-89.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-81.
33
Cylinder-#1 ignition coil: open or short circuit detected in the prima-
ry lead of the cylinder-#1 ignition coil.
Able to start engine (depending on the number of faulty cylinders)
Able to drive vehicle (depending on the number of faulty cylinders)
30
Actuates the cylinder-#1 ignition coil five times at one-second intervals.
The "CHECK" indicator and "
comes on each time the ignition coil is actuated.
Check that a spark is generated five times.
• Connect an ignition checker.
8-48
FUEL INJECTION SYSTEM
Confirmation of service com-
Turn the main switch to "ON",
then to "OFF", and then back to
"ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 2.
Turn the main switch to "ON",
then to "OFF", and then back to
"ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 3.
Turn the main switch to "ON",
then to "OFF", and then back to
"ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 4.
" on the Yamaha diagnostic tool screen
pletion