Honda NSS250S Manual page 545

SERVICE INFORMATION
GENERAL
• The PCM/ECM may be damaged if dropped. Also if the connector is disconnected when current is flowing, the excessive
voltage may damage the PCM/ECM. Always turn OFF the ignition switch before servicing.
• Use spark plug of the correct heat range. Using spark plug with an incorrect heat range can damage the engine.
• Some electrical components may be damaged if terminals or connectors are connected or disconnected while the igni-
tion switch is turned ON and current is present.
• When servicing the ignition system, always follow the steps in the troubleshooting sequence (page 20-4).
• This scooter's Ignition Control Module (ICM) is built into the PCM/ECM.
• The ignition timing cannot be adjusted since the PCM/ECM is factory preset.
• A faulty ignition system is often related to poor connected or corroded connectors. Check those connections before pro-
ceeding. Make sure the battery is adequately charged. Using the starter motor with a weak battery results in a slower
engine cranking speed as well as no spark at the spark plug.
• Although the PCM/ECM is controlling ignition timing according to engine speed fundamentally, ignition timing is
assisted also with the signal from the TP sensor and ECT sensor.
• Following components information.
– Ignition switch (page 23-26)
– NSS250S: Engine stop switch (page 22-27)
– NSS250A: Engine stop switch (page 22-29)
– Sidestand switch (page 22-33)
– Engine stop relay (page 6-79)
– Bank angle sensor (page 6-92)
– CKP sensor (page 13-7)
SPECIFICATIONS
Spark plug NGK
Spark plug gap
Ignition coil primary peak voltage
CKP sensor peak voltage
Ignition timing ("F" mark)
TORQUE VALUE
Timing hole cap
TOOLS
Imrie diagnostic tester (model 625)
or Peak voltage adaptor
07HGJ-0020100
with commercially available digital
multimeter (impedance 10 MΩ/DCV
minimum)
maxiscooter-club.ru
ITEM
6 N·m (0.6 kgf·m, 4.4 lbf·ft)
ECM test harness 33P
070MZ-MCA0100
IGNITION SYSTEM
SPECIFICATIONS
LMAR8A-9
0.80 – 0.90 mm (0.031 – 0.035 in)
100 V minimum
0.7 V minimum
10° BTDC at idle
Apply oil to the threads.
Test probe
07ZAJ-RDJA110
20-3