Ignition System Troubleshooting - Honda CBR954RR 2002 Service Manual

TROUBLESHOOTING
Inspect the following before diagnosing the system.
-
Faulty spark plug
-
Loose spark plug cap or spark plug wire connection
-
Water got into the direct ignition coil (leaking the ignition coil secondary voltage)
spark test. If there is spark, the exchanged direct ignition coil is faulty.
"Initial voltage" of the ignition primary coil is the battery voltage with the ignition switch turned to "ON" and engine stop
switch at RUN (The engine is not cranked by the starter motor).
No spark a t all plugs
Unusual condition
No
Ignition coil initial voltage with ignition and
primary volt- engine stop switches on. (Other electri-
cal components are normal)
age
Initial voltage is normal, but it drops
down t o 2 - 4 V while cranking the
engine.
Initial voltage is normal, but no peak
voltage while cranking the engine.
Initial voltage is normal, but peak volt-
age is lower than standard value.
Initial and peak voltage are normal, but
does n o t spark.
Peak voltage is lower than standard
generator value.
No peak voltage.
Probable cause (Check in numerical order)
2. An open circuit in B l a c k w h i t e wire between the direct
ignition coil and engine stop relay.
3. Loose or poor connect of the direct ignition coil primary
wire terminal, or an open circuit i n primary coil (Check at
the ECM connector).
4. Faulty ECM (in case when the initial voltage is normal
while disconnecting ECM connector)
2. Undercharged battery.
3. N o voltage between the B l a c k w h i t e
at the ECM multi-connector or loosen ECM connec-
tion.
4. A n open circuit or loose connection in Green wire.
5. A n open circuit or loose connection i n BlueiBlack,
the direct ignition coils and ECM.
6. Short circuit in ignition primary coil.
7. Faulty side stand switch or neutral switch.
8. An open circuit or loose connection in No.7 related circuit
wires.
Side stand switch line: G r e e n w h i t e wire
Neutral switch line: Light Green and
9. Faulty ignition pulse generator (measure the peak volt-
age).
(in
10. Faulty ECM case when above
1. Faulty peak voltage adaptor connections.
2. Faulty peak voltage adaptor.
3. Faulty ECM (in case when above No.1, 2 are normal).
2. Cranking speed is too l o w (battery under-charged).
3. The sampling timing of the tester and measured pulse
were not synchronized (system is normal if measured
voltage is over the standard voltage at least once).
4. Faulty ECM (in case when above No. 1 - 3 are normal).
1. Faulty spark plug or leaking ignition coil secondary cur-
rent ampere.
2. Faulty iclnition coil (s).
1. The multimeter impedance is t o o low; below 10 MRIDCV.
2. Cranking speed is too l o w (battery under charged).
3. The sampling timing of the tester and measured pulse
were not synchronized (system is normal if measured
voltage is over the standard voltage at least once).
4. Faulty ECM (in case when above No. 1
1. Faulty peak voltage adaptor.
2. Faulty ignition pulse generator.
IGNITION SYSTEM
and Body ground
(+)
-
No.
1 9 are normal).
-
3 are normal).
17-3