⑷ signal corresponding to 2
mis-teeth.
Speed sensor determines firing and fuel injection time by monitoring the teeth on the flying
wheel, engine speed and crankshaft position signal.
● Testing method
a ohmmeter method: the coil resistance is 515Ω,
b oscilloscope method:
Use oscilloscope to monitor pulse waveform, and a voltage pulse will generate when a
tooth pass by. The flying wheel on this engine have 60-2 teeth.
2.1.6 Ignition coil
Ignition Coil Electrical Specification
Primary coil induction 5.80±15%mH
Primary coil resistance 0.53±10%Ω
Secondary coil induction 12.8±10%kΩ
Secondary coil resistance 40.0±20%H
Testing voltage 2Vdc
Testing current 7.0Amps
Output (no load) 40kvMin
Output (50Pf load) 40.0±7%mJ
Energy storage time (reference) 6.3ms
Secondary peak value current 74mA±7%
I firing delayed time 3.6ms±3%
Coil number ratio 83:1
● Testing method
Ohmmeter method: referring to above chart and check ignition coil resistance.
● Ignition wire
Remove ignition wire and 5-8mm away from cylinder. Turn on ignition switch, start engine
and watch flame. A strong blue flame indicates a operational ignition coil. Otherwise, check
ignition coil. Using ohmmeter method, referring to above chart, check and remove injector
connector before checking.
● Monitoring each cylinder misfire
Remove each cylinder spark plug, and connect to appropriate high-tense wire, ensuring
spark plug thread reliably ground on cylinder body. Start engine and monitor spark plug
misfire.
2.1.7 Throttle position sensor (TPS)
TPS fault may cause unsmooth acceleration, engine stalling and rough idle etc. TPS has 3
leads, a current lead (Pin B22), a ground lead (Pin B23) and a signal lead (B17).
● Testing method
a ohmmeter method:
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