Electronic Control System Description - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

6E2-8 ENGINE AND EMISSION CONTROL SYSTEM (H25 ENGINE)

Electronic Control System Description

The electronic control system consists of 1) various sensors which detect the state of engine and driving condi-
tions, 2) ECM (PCM) which controls various devices according to the signals from the sensors and 3) various
controlled devices.
Functionally, it is divided into the following sub systems :
• Fuel injection control system
• Heated oxygen sensor heater control system (if equipped)
• Idle air control system
• Fuel pump control system
• Evaporative emission control system
• Ignition control system
• EGR system
Also, with A/T model, PCM controls A/T.
ELECTRONIC CONTROL SYSTEM COMPONENT LOCATION
11*
j*
A*
17
B*
14
3
b
2
a*
k*
f
1
F
12
5
6
g*
13
c
10
d
C*
e
7
3
15 4
f
b
16
9
D*
8*
h*
i*
E*