2007 Yamaha Apex Factory Service Manual, Page 591Get this manual

2007 Yamaha Apex Factory Service Manual, Page 591

FUEL INJECTION SYSTEM SUBSTITUTE CHARACTERISTICS OPERATION CONTROL (FAIL-SAFE ACTION) If the ECU detects an abnormal signal
sensorNo normal signals are received from the crankshaft position sensorFail-safe action Continues to operate the engine
based on the results of the cylinder identification that existed up to that point Stops the engine (by stopping the injection
and ignition)Ableunable Ableunable to start to drive Unable Able Crankshaft position sensor Intake air pressure sensor (open
or short circuit) (pipe system) Throttle position sensor (open or short circuit) (stuck) Intake air pressure Atmospheric
pressure Coolant temperature sensor 13 14 15 16 20 Intake air pressure sensor-open Fixes the intake air pressure to or short
circuit detected85.0 kpaFaulty intake air pressure sensor systemThrottle position sensor-open or short circuit detectedDefective
values are detected due to the internal malfunctionCoolant temperature sensoropen or short circuit detected Fixes the throttle