1A-8 Engine General Information and Diagnosis:
Diagnostic Information and Procedures
Engine Symptom Diagnosis
B947H11104001
“O”
“S”
“T”
“U”
“L”
“R”
“M”
“Y”
“Z”
“N”
“V”
“A”
“P”
“Q”
“W”
“X”
I947H1110006-01
“A”: ECM “Q”: Camshaft position sensor (CMPS) “W”: Atmospheric pressure sensor (APS)
“L”: Exhaust control valve actuator (EXCVA) “R”: Ignition coil (IG coil) “X”: Gear position switch (GP switch)
“M”: Cooling fan relay “S”: Secondary fuel injector “Y”: Drive mode selector
“N”: Cooling fan “T”: Primary fuel injector “Z”: Combination meter
“O”: Intake air temperature sensor (IATS) “U”: Engine coolant temperature sensor (ECTS)
“P”: PAIR control solenoid valve “V”: Speed sensor
Condition Possible cause Correction / Reference Item
Engine will not start or is
hard to start
(Compression too low)
Valve clearance out of adjustment. Adjust.
Worn valve guide or poor seating of
valve.
Repair or replace.
Mistimed valve. Adjust.
Excessively worn piston ring. Replace.
Worn-down cylinder bore. Replace.
Too slow Starter motor cranking. Refer to “Starting System Diagram” in Section
1I (Page 1I-1).
Poor seating of spark plug. Retighten.
Engine will not start or is
hard to start (Plug not
sparking)
Fouled spark plug. Clean.
Wet spark plug. Clean and dry.
Defective ignition coil. Replace.
Defective CKP sensor. Replace.
Defective ECM. Replace.
Open-circuited wiring connection. Repair or replace.
Engine will not start or is
hard to start (No fuel
reaching the intake
manifold)
Clogged fuel filter or fuel hose. Clean or replace.
Defective fuel pump. Replace.
Defective fuel pressure regulator. Replace.
Defective fuel injector. Replace.
Defective fuel pump relay. Replace.
Defective ECM. Replace.
Open-circuited wiring connection. Check and repair.
Manuals by Motomatrix / The Solution For Lost Motorcycle Coded Keys
email: info@motomatrix.co.uk / www.motomatrix.co.uk
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