Ignition System Peak Voltage - Yamaha 25J Service Manual

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ELEC
IGNITION SYSTEM

IGNITION SYSTEM PEAK VOLTAGE

WARNING
When checking the CDI unit do not touch
any of the connections of the digital tester
lead wires.
1. Measure:
CDI unit output peak voltage
Above specification → Replace the
ignition coil.
Lead color:
#1: B/O – B, #2: B/W – B,
#3: B/Y – B
Circuit
r/min
V 4.5
2. Measure:
Charge coil output peak voltage
Below specification → Replace the
charge coil.
Lead color:
Br – L
Circuit
r/min
V 175
Test harness:
YB-38832/90890-06772
3. Measure:
Pulser coil output peak voltage
Below specification → Replace the
pulser coil.
Above specification → Replace the
CDI unit.
Lead color:
#1: W/R – B, #2: W/B – B,
#3: W/G – B
Circuit
r/min
V 4.0
Test harness:
YB-38832/90890-06772
8-14
Loaded
Cranking 1500
190 185
Loaded
Cranking 1500
210 205
Loaded
Cranking 1500
4.0 11.0
E
3500
105
3500
115
3500
20