Basic Instruction For Troubleshooting - Yamaha YP250A 1999 Supplementary Service Manual

BASIC INSTRUCTION FOR TROUBLESHOOTING

WARNING
S Execute the troubleshooting on each malfunction from [A] to [D] in sequence.
S Use the sufficiently charged regular batteries only.
[A] Malfunction check by the ABS warning light
[B] Detail check of malfunction
Results by self diagnosis are displayed by the ABS warning light or tester according to the ECU's opera-
tion.
[C]Supposing the malfunction cause and position
Find the malfunction cause by reasoning the place and situation where it occurred.
[D]ABS system services
Execute the final check after disassembly and assembly.
WARNING
Perform the troubleshooting [A]![B]![C]![D] in order. Be sure to follow the order since it results
in the wrong diagnosis if the order is differently taken or omitted.
ANTI-LOCK BRAKE SYSTEM (ABS)
42
CHAS