Electronic Control System Description - Suzuki Grand Vitara 2011 Manual

3
1
[A]: J20A engine
10. Electrode
11. A/F signal processing circuit

Electronic Control System Description

The electronic control system consists of 1) various sensors which detect the state of engine and driving conditions, 2)
ECM 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
• Ignition control system
• Intake manifold tuning valve control system (J20A engine)
• Electric Throttle Body Control System
• Fuel pump control system
• Radiator cooling fan control system
• Evaporative emission control system (if equipped)
• EGR system
• A/F sensor heater control system (if equipped)
• Oxygen sensor heater control system (if equipped)
• A/C control system (A/C model)
• Camshaft position control system (M16A engine)
• Immobilizer control system (if equipped)
• Generator control system (J20A engine)
• Controller (computer) communication system
Especially, ECM (Engine Control Module), BCM (Body electrical Control Module), combination meter, TCM
(Transmission Control Module (A/T model)), ABS / ESP® control module, 4WD control module (4WD model), keyless
start control module (keyless start model) and steering angle sensor (ESP® model) intercommunicate by means of
CAN (Controller Area Network) communication.
Refer to "Engine and Emission Control System Flow Diagram: For Petrol Engine Model" and "ECM Input / Output
Circuit Diagram: For Petrol Engine Model".
Engine General Information and Diagnosis: For Petrol Engine Model 1A-14
7
1
2
[A]
6
9
10
4
12. CPU
13. Lean
14. Rich
8
12V
13
AFS-
14
15
AFS+
AFH+
AFH-
AFRV
AFRG
15. 0.4 V
5
5V
11 12
5V
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