N0152495
x2
The PCM uses the CKP sensor signal to calculate a
spark target and then fires the COP. The PCM uses the
CMP sensor signal to identify the compression stroke
of cylinder 1.
The PCM controls the ignition coils after it calculates
the spark target. The COP coils fire the spark plug after
receiving the fire signal from the PCM.
The current flow or dwell through the primary ignition
coil is controlled by the COP electronics.
When the ignition coil driver is switched ON, current
rapidly builds up to a maximum value, determined by
the coil inductance and resistance. When the current is
switched OFF, the magnetic field collapses which
induces a secondary high voltage surge and the spark
plug is fired.
Intake Air Distribution and Filtering
E224363
3
2
5
4
1
Turbocharger
1
Inlet manifold
2
CAC (charge air cooler)
3
Boost pressure sensor
4
Throttle body
5
(G1821770)
Service Training
46
Lesson 3 – Powertrain
Intake Air Distribution and Filtering
