Suzuki Grand Vitara JB627. Manual — part 16
1A-13 Engine General Information and Diagnosis:
Electronic Control System Description
S6JB0B1101010
The electronic control system consists of various sensors which detect the state of engine and driving conditions, ECM
which controls various devices according to the signals from the sensors and 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 (if equipped)
• IMT valve control system
• Electric throttle body control system
• Radiator cooling fan control system
• A/F sensor heater control system
• A/C control system (if equipped)
• Immobilizer control system (if equipped)
• Controller communication system
Especially, ECM, BCM, combination meter, TCM (A/T model), ABS control module or ESP
® control module, steering
angle sensor (ESP
® model), 4WD control module (if equipped) and keyless start control module (if equipped)
intercommunicate by means of CAN communication.
Refer to “Electronic Control System Location”, “Electronic Control System Diagram” and “Electronic Control System
Wiring Circuit Diagram”.
Engine and Emission Control Input / Output Table
Function
Output
Input
Main relay control
Main relay
Ignition switch
Fuel pump control
Fuel pump relay
• CKP sensor
• Ignition switch
• Starter switch
• Immobilizer control module (in ECM) (if equipped)
Injection control
Fuel Injectors
• CKP sensor
• CMP sensor
• MAF sensor
• IAT sensor
• TP sensor
• ECT sensor
• A/F sensor
• HO2S (if equipped)
• Barometric pressure sensor
• Ignition switch
• Starter switch
• Immobilizer control module (in ECM) (if equipped)
A/F sensor and HO2S
heater control (if
equipped)
A/F sensor and HO2S
• Ignition switch
• MAF sensor
• ECT sensor
• TP sensor
• CKP sensor
Engine General Information and Diagnosis: 1A-14
Idle speed control
Throttle actuator
• CKP sensor
• MAF sensor
• IAT sensor
• TP sensor
• ECT sensor
• APP sensor
• Barometric pressure sensor
• Wheel speed sensor
• A/C refrigerant pressure sensor (if equipped)
• A/C evaporator outlet air temperature sensor (if equipped)
• Ignition switch
• Starter switch
• Brake light switch
• A/C switch (if equipped)
• Blower fan switch
• Rear end door defogger switch
• PSP switch
• Lighting switch
• Transmission range sensor (if equipped)
Ignition control
Ignition coil with igniter
• Ignition switch
• Starter switch
• MAF sensor
• IAT sensor
• ECT sensor
• TP sensor
• CKP sensor
• CMP sensor
• Knock sensor
• Immobilizer control module (in ECM) (if equipped)
EGR control (if equipped) EGR valve
• Ignition switch
• Wheel speed sensor
• MAF sensor
• IAT sensor
• ECT sensor
• TP sensor
• CKP sensor
EVAP purge control
EVAP canister purge valve
• Barometric pressure sensor
• Ignition switch
• A/C switch (if equipped)
• Wheel speed sensor
• A/F sensor
• MAF sensor
• IAT sensor
• ECT sensor
• TP sensor
• CKP sensor
Function
Output
Input
1A-15 Engine General Information and Diagnosis:
Radiator cooling fan
control
Radiator cooling fan relay
No.1, No.2 and No.3
• Ignition switch
• A/C switch (if equipped)
• A/C refrigerant pressure sensor (if equipped)
• A/C evaporator outlet air temperature sensor (if equipped)
• Wheel speed sensor
• ECT sensor
MIL control
MIL
• Ignition switch
• Barometric pressure sensor
• Wheel speed sensor
• A/F sensor
• HO2S (if equipped)
• MAF sensor
• IAT sensor
• TP sensor
• ECT sensor
• APP sensor
• MAP sensor (if equipped)
• CKP sensor
• CMP sensor
• Knock sensor
• EVAP canister purge valve
• Immobilizer control module (in ECM) (if equipped)
ECM main power supply
control
Main relay
• Ignition switch
Throttle actuator power
supply control
Throttle actuator control
relay
• Ignition switch
• TP sensor
• APP sensor
IMT valve control
IMT valve vacuum control
solenoid valve
• TP sensor
• ECT sensor
• CMP sensor
A/C compressor control
(if equipped)
A/C compressor relay
• Ignition switch
• Starter switch
• A/C switch
• Blower fan switch
• A/C refrigerant pressure sensor
• A/C evaporator outlet air temperature sensor
• Wheel speed sensor
• ECT sensor
• TP sensor
• CKP sensor
Function
Output
Input
Engine General Information and Diagnosis: 1A-16
Schematic and Routing Diagram
Engine and Emission Control System Diagram
S6JB0B1102001
6
12
42
20
43
27
30
29
28
11
4
3
2
1
33
26
23
25
34
37
24
5
9
13
32
15
8
36
37
7
14
32
16
10
21
22
17
18
19
31
38
41
44
39
40
35
I5JB0C110008-01
1. Air cleaner
16. HO2S (bank-2) (if equipped)
31. Battery
2. MAF and IAT sensor
17. APP sensor
32. Warm-up three way catalytic converter
3. CMP sensor
18. Brake switch
33. EVAP canister
4. CKP sensor
19. Clutch switch (if equipped)
34. EVAP canister purge valve
5. MAP sensor (if equipped)
20. Cruise control switch (if equipped)
35. EGR valve (if equipped)
6. A/C refrigerant pressure sensor
21. Fuel pump with main fuel level sensor
36. Fuel injector
7. ECT sensor
22. Sub fuel level sensor
37. Ignition coil assembly
8. Knock sensor
23. Fuel pressure regulator
38. Transmission range sensor (if equipped)
9. Electric throttle body assembly with TP sensor
24. IMT valve
39. Main relay
10. Three way catalytic converter
25. IMT vacuum solenoid valve
40. Fuel pump relay
11. ECM
26. IMT vacuum tank
41. Starting motor control relay
12. HO2S heater relay
27. Power steering pump pressure switch
42. Radiator cooling fan relay
13. A/F sensor (bank-1)
28. DLC
43. A/C compressor relay (if equipped)
14. A/F sensor (bank-2)
29. ABS or ESP
® control module
44. Ignition switch
15. HO2S (bank-1) (if equipped)
30. To BCM, combination meter, TCM (A/T model), 4WD
control module (if equipped), keyless start control
module (if equipped) and steering angle sensor (ESP
®
model)
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