1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 315Get this manual
IGNITION SYSTEM
TROUBlESHOOTI NG
Weak or no spark at plug GOOD SPARK 1Try spark test with known good spark plug1- WEAK OR NO SPARK GOOD SPARK Faulty spark plug
WEAK OR NO SPARK 3Check ignition control module (lCM) connectors for loose or poor contactNORMAL 4Check the resistance, continuity and voltage at the ICM connectors Also check the ignition secondary coil resistance (page 17-5)the wire harness side (page 17-4)
fLoose or poor contact of ICM connectors
ABNORMAL
ALL NORMAL ABNORMAL
Faulty ICM
5Check the related components in that part of the abnormal lineAfter checking, compare the measurements of (5) with those of (4)NORMAL (DIFFERENT MEASUREMENTS) ABNORMAL (SAME MEASUREMENTS) ''-Faulty related components ignition pulse generator (page 17-5) '88, After '93: neutral switch (page 20-6) '89-'93: .reverse switch (page 20-6) ignition coil (page 17-5) ignition switch (page 20-5) engine stop switch (page 20-5) ground wire (G) AC sensor line (page 17-6) battery (page 18-3) fuse15 diode (page 19-8)