SUZUKI SWIFT 2004 2.G Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-11
Generator Control System DescriptionS7RS0B1101010
Generator Control System consists of a generator (1), electric load current sensor (7) located in the main fuse box (4)
and ECM (5).
ECM controls generated electricity (adjusting voltage of IC regulator (2)) so that it is suitable for the engine and electric
load conditions. When the electric load increases quickly, generation load of the generator increases quickly and
causes idling to change. To prevent this, ECM makes generated electricity volume vary gradually to stabilize idling.
Also, it reduces the engine load caused by temporary incr ease in electricity generation to cope with the engine
condition (such as when accelerating).
Operation
ECM controls the generated voltage of the generator using “C” terminal (generator control terminal) duty, based on
following information.
• Engine condition (ECT, vehicle speed, engine speed, TP, etc.) (9)
• Battery voltage (ECM backup power voltage) (10)
• Electric load condition (blower motor, rear defogger, head lights, radiator fan, A/C, etc.) (11)
• “FR” terminal output (field coil (3) cont rol duty) which indicates the operation rate (electricity generation condition) of
the generator.
Then the generator uses “C” terminal duty to regulate the adju sting voltage of the IC regulator with the field coil control
duty so as to control its generated voltage (“B” terminal output voltage).
(For more information of the generated voltage, refer to “Charging System Specifications in Section 1J”.)
Furthermore, the generation condition of the generator is co ntrolled to the optimum level by the electric load current
sensor (7) which detects the electrical load condition (cur rent consumption) linearly even when a sudden electrical
load variation occurs and thus the engine load is reduced.
B
IG
L
C
E
6
2
3
FR
5
12 13
14
1IG1
7
4
8
11
10 9
CMO
FCD
GCD
I6RW0H110005-01
6. Ignition switch
12. BCM 14. CAN driver
8. Battery 13. Combination meter

Downloaded from www.Manualslib.com manuals search engine 1A-12 Engine General Information and Diagnosis:
Electronic Control System DescriptionS7RS0B1101011
The electronic control system consists of 1) various sensors which detect the state of engine and driving conditions, 2)
ECM which controls various devices ac cording 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
• Electric throttle body control system
• Fuel pump control system
• Radiator cooling fan control system
• Evaporative emission control system
• EGR system
• Oxygen sensor heater control system
• A/C control system (A/C model)
• Camshaft position control system
• Immobilizer control system
• Generator control system
• Controller (computer) communication system
Especially, ECM, BCM, combination meter, TCM (A/T model), ABS/ESP ® control module, steering angle sensor
(ESP® model) and keyless start control module (if equipped) intercommunicate by means of CAN communication.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-13
Engine and Emission Control System Flow Diagram
Intake manifold
Exhaust gas AirFuel
Va p o r
EVAP canister purge valve
ECM
Barometric pressure sensor
A/C compressor clutch
Generator
Immobilizer
coil antenna
P/S controlmodule
Brake light switch
Air cleaner
IAT
sensor MAF
sensor
A/C refrigerant
pressure sensor
TP
sensor
Throttle body
assembly
Throttle
actuator
Wheel speed
sensor (VSS)
Steering angle sensor (ESP® model)
ABS / ESP® control module
Blower speed
selector
MAP
sensor EGR
valve
Check valve
EVAP
canisterTCM
Exhaust
manifold Exhaust
pipe
Fuel injector
ECT
sensor
Heater
control
HO2S-1 HO2S-2
Engine
CMP
sensor CKP
sensor
Knock
sensor Ignition
coil with
igniter
Fuel tank
Fuel
pump CMP actuator
oil control valve (VVT model) Three way
catalyst
Heater
control
Radiator
cooling fan
Combination meter
· MIL
· Coolant Temp.
· Immobilizer indicator light
· Tachometer
· Speedometer
· Odometer
· Diagnostic trouble code (DTC)
Keyless start
control module
DLC
· Electric load
· A/C switch ON
BCM
Diagnosis
connector
(Hong Kong model) Electric load
current sensor (if equipped)
APP sensor
I7RS0B110004-01

Downloaded from www.Manualslib.com manuals search engine 1A-14 Engine General Information and Diagnosis:
ECM Input / Output Circuit Diagram
+B
58
IG1 +BB
ST IG2 IG2
60 61
69
BLK/WHT
WHT/RED
BRN/WHTBLK/RED
67
: 72: 73: 5V: 12V 70
59 IG1
YEL/BLK
YEL/GRN
YEL/RED
WHT
BLK/ORN
BLK
BLK
57
62
64
65
63
66
68
5 +B
4PNKBLK/ORN
RED/YEL
7
6GRY/REDRED/BLK
LT GRN
GRY
ORN
+B
BLK/YEL
GRN/BLK
10
ORN
WHT/BLK
9
8
RED
IG1
11
12WHT
BRNRED/BLU
3 3
YEL
BLK/REDBLK/WHT 1
37
38
39
40BLU/YEL
BLU/WHT
BLU/RED
BLU/ORN
42

BRN/YELWHT/RED
GRN/REDGRN/ORN
BLK/RED
BLK
E23-30E23-16
E23-60
E23-1
E23-2E23-29
BLK
WHT
+
+BB
WHT
41BLU/BLK
BRN
2
3
BLU
REDYELWHT
GRN
BLK
LT GRN/BLK
36
34
35
32
WHT
GRNRED
BLU/ORN
LT GRN/RED
RED/YEL
[B]
C37-30E23-31
E23-28
E23-13
C37-58
C37-48
C37-15
GRN/YEL
54
55
GRN/WHTC37-5
C37-6
51
52GRY53E23-47 44
45PNKBLKGRN/WHTE23-15
YEL/RED
YEL/GRN
43YEL
RED
C37-59
C37-60
C37-18C37-19
C37-29
46
47
48
L+
H+
L-
H-
49
LT GRN
GRN
50GRYE23-46
E23-48
C37-4C37-3
C37-17
C37-16
C37-2
C37-1
C37-41C37-42
C37-40
C37-54C37-43
C37-44C37-45
E23-45E23-32E23-35E23-37E23-52
E23-51E23-50
C37-20
C37-21
C37-26C37-27
E23-34E23-36
C37-25
C37-14C37-53
C37-24C37-55
E23-55
E23-57
C37-10
C37-11
C37-5113RED3C37-56C37-52
C37-46
C37-47
C37-57E23-54
C37-50
30
+BB
GRN/WHT
29E23-20
31
DN
BLUE23-12
IG1PNK/BLU
28
C37-23
BLU/YEL27C37-8
C37-28
BRN/WHT
BRNPPL
56
E23-25E23-4
RED/BLUE23-26
71
[A]
16
18
19
18 22
23 22
24
25
21
20
[B] 17
14
IG2
+BB
+BB
REDWHT
BLU/WHT
PPL/WHT
15
REDWHT26
E23-19
E23-5
E23-3E23-18
C37-13C37-12
22
33
3
I7RS0B110005-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-15
Terminal Arrangement of ECM Coupler (Viewed from Harness Side)
[A]: Manual A/C model24. ABS / ESP® control module 49. Radiator cooling fan motor
[B]: Auto A/C model 25. TCM 50. “RDTR FAN” fuse
1. ECM 26. To other control module connected CAN 51. A/C compressor relay
2. APP sensor assembly 27. Generator 52. Magnet clutch of compressor (A/C model)
3. Shield wire 28. Electric load current sensor (if equipped) 53. “A/C CPRSR” fuse
4. CMP sensor 29. Brake light 54. Ignition coil assembly (for No.1 and No.4 spark
plugs)
5. CKP sensor 30. Brake light switch 55. Ignition coil assembly (for No.2 and No.3 spark
plugs)
6. MAF and IAT sensor 31. Diagnosis connector (Hong Kong model) 56. P/S control module
7. MAP sensor 32. Throttle actuator control relay 57. “RADIO” fuse
8. ECT sensor 33. “THR MOT” fuse 58. Main relay
9. A/C refrigerant pressure sensor 34. Throttle throttle body assembly 59. “IG COIL” fuse
10. A/C evaporator outlet air temp. sensor (Manual A/C model) 35. Throttle actuator
60. Ignition switch
11. HO2S-1 36. TP sensor 61. “IG ACC” fuse
12. HO2S-2 37. Injector No.1 62. “FI” fuse
13. Knock sensor 38. Injector No.2 63. Starting motor control relay
14. Blower motor relay 39. Injector No.3 64. “ST SIG” fuse
15. Blower motor 40. Injector No.4 65. “ST MOT” fuse
16. Blower motor resistor 41. EVAP canister purge valve66. Transmission range switch (A/T model) or CPP
switch (Hong Kong model with M/T)
17. Blower speed selector 42. EGR valve 67. Starting motor
18. A/C switch 43. Oil control valve (Camshaft position
control) (VVT model) 68. Immobilizer coil antenna
19. Blower motor controller 44. Fuel pump relay 69. Main fuse box
20. HVAC control module 45. Fuel pump 70. Battery
21. Data link connector (DLC) 46. Radiator cooling fan motor relay No.1 71. Barometric pressure sensor
22. To other control module connected with DLC 47. Radiator cooling fan motor relay No.2
72. Engine ground
23. BCM 48. Radiator cooling fan motor relay No.3 73. Body ground
E23 C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
I4RS0A110008-01

Downloaded from www.Manualslib.com manuals search engine 1A-16 Engine General Information and Diagnosis:
Connector: C37Terminal Wire color Circuit Terminal Wire color Circuit 1 BLU/YEL Fuel injector No.1 output 31 — —
2 BLU/WHT Fuel injector No.2 output 32 — —
3GRN/ORN EGR valve (stepper motor coil
2) output 33 — —
4 GRN/RED EGR valve (stepper motor coil
1) output 34 — —
5 GRN/WHT Ignition coil No.2 and No.3
output 35 — —
6 GRN/YEL Ignition coil No.1 and No.4
output 36 — —
7— — 37— —
8 BRN/WHT Generator field coil monitor
signal 38 — —
9— — 39— —
10 WHT Oxygen signal of HO2S-1 40 WHT TP sensor (sub) signal
11 BRN Oxygen signal of HO2S-2 41 — Ground for shield wire of TP
sensor circuit
12 WHT CAN (low) communication line
(active low signal) to TCM (A/T
model) 42 BLK Ground for TP sensor
13 RED CAN (high) communication line
(active high signal) to TCM (A/
T model) 43 RED
Output for 5 V power source of
TP sensor
14 GRY/RED Output of 5 V power source for
MAP sensor, A/C refrigerant
pressure sensor 44 LT GRN/BLK Output of throttle actuator
15 BLK Ground for ECM 45 LT GRN/RE D Output of throttle actuator
16 BLU/RED Fuel injector No.3 output 46 BLK/RED Heater output of heated
oxygen sensor-1
17 BLU/ORN Fuel injector No.4 output 47 RED/BLU Heater output of heated
oxygen sensor-2
18 BRN/YEL EGR valve (stepper motor coil
4) output 48 YEL/GRN Starting motor signal
19 WHT/RED EGR valve (stepper motor coil
3) output 49 — —
20 RED/YEL CMP sensor signal 50 — G round of ECM for shield wire
21 PNK CKP sensor signal 51 — Ground of ECM for shield wire
22 — — 52 — Ground of ECM for shield wire
23 PNK/BLU Electric load current sensor
signal 53 RED/BLK MAP sensor signal
24 LT GRN ECT sensor signal 54 GRN TP sensor (main) signal
25 BLK/YEL IAT sensor signal 55 ORN Ground for sensors
26 GRN/BLK MAF sensor signal 56 RED Knock sensor signal
27 GRY Ground for MAF sensor 57 YEL Ground for sensors
28 BLU/YEL Generator control signal output 58 BLK/ORN Ground for ECM
29 BLU/BLK EVAP canister purge valve
output 59 YEL/GRN Oil control valve ground
30 BLK Ground for ECM 60 YEL/RED Oil control valve output

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-17
Connector: E23Terminal Wire color Circuit Terminal Wire color Circuit 1 BLK/RED Main power supply 31 BLK Ground for ECM
2WHT/RED Power source for ECM internal
memory 32 RED/YELPower supply of throttle
actuator drive circuit
3RED CAN communication line
(active high signal) for ABS/
ESP®
control module, BCM,
combination meter 33 — —
4BRN Engine revolution signal output
for P/S control module 34 REDOutput of 5 V power source for
APP sensor (sub)
5 PPL/WHT 12 V serial communication line
of DLC 35 BRNOutput of 5 V power source for
APP sensor (main)
6 — — 36 YEL APP sensor (sub) signal
7 — — 37 GRN APP sensor (main) signal
8— — 38— —
9— — 39— —
10——40—— 11——41——
12 BLU Diagnosis switch terminal
(Hong Kong model) 42 — —
13 YEL/RED Clock signal for immobilizer
coil antenna 43 — —
14——44——
15 GRN/WHT Fuel pump relay output 45 BLU/ORN Throttle actuator control relay
output
16 BLK/RED Main power supply 46 LT GRN Radiator cooling fan relay No.1
output
17 — — 47 GRY A/C compressor relay output
18 WHT CAN communication line
(active low signal) for ABS/
ESP®
control module BCM,
combination meter 48 GRN
Radiator cooling fan relay No.2
and No.3 output
19 BLU/WHT Electric load signal for heater
blower motor 49 — —
20 GRN/WHT Brake light switch signal 50 — Ground for shield wire of APP
sensor
21 — — 51 WHT Ground for APP sensor (sub)
22 — — 52 BLU Ground for APP sensor (main)
23——53——
24 — — 54 ORN Ground for sensors
25 PPL Vehicle speed signal output for
P/S control module 55 REDA/C refrigerant pressure
sensor signal
26 RED/BLU EPS signal 56 — —
27 — — 57 WHT/BLK A/C evaporator outlet air temp.
sensor signal (Manual A/C
model)
28 YEL/BLK Serial communication line for
immobilizer coil antenna 58 — —
29 BLK/WHT Ignition switch signal 59 — —
30 WHT Starting motor control relay
output 60 BRN/WHT Main power supply relay output

Downloaded from www.Manualslib.com manuals search engine 1A-18 Engine General Information and Diagnosis:
Engine and Emission Control Input / Output TableS7RS0B1101012
INPUTOUTPUT
ELECTRIC CONTROL DEVICE
BAROMETRIC PRESSURE SENSOR
STOP LAMP SWITCH
START SWITCH
IGNITION SWITCH
A/C REFRIGERANT PRESSURE SENSOR
BLOWER SWITCH
A/C SWITCH
A/C EVAP OUTLET AIR TEMP. SENSOR (Manual A/C model)
ABS/ESP
® CONTROL MODULE (Wheel Speed Signal)
HO2S-1
HO2S-2
IAT SENSOR MAF SENSOR
ECT SENSOR
TP SENSOR
MAP SENSOR
CMP SENSOR
CKP SENSOR
KNOCK SENSOR
ABS/ESP
® CONTROL MODULE (ABS active signal / ESP® status signal)
IMMOBILIZER CONTROL MODULE (in ECM)
APP SENSOR
FUEL PUMP RELAY
FUEL INJECTOR
HO2S HEATER THROTTLE ACTUATOR
THROTTLE ACTUATOR CONTROL RELAY
IGNITION COIL WITH IGNITER
EGR VALVE
EVAP CANISTER PURGE VALVEA/C COMPRESSOR RELAY RADIATOR FAN RELAY
MIL
MAIN RELAY
OIL CONTROL VALVE
(VVT model)
SIGNAL FROM SENSOR, SWITCH AND CONTROL MODULE
I7RS0B110009-03

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-19
Schematic and Routing Diagram
Engine and Emission Control System DiagramS7RS0B1102001
26 10
9 7
8
14 13
23
11
15
12
2 6
5 1
3
30
29
38
1617 36
31
22
21 40
27
4
28
19
43
39
20
32184233342537413524
44
I7RS0B110010-01

Downloaded from www.Manualslib.com manuals search engine 1A-20 Engine General Information and Diagnosis:
1. Air cleaner16. CMP sensor31. Battery
2. EVAP canister purge valve 17. CKP sensor32. A/C compressor relay
3. MAF and IAT sensor 18. Radiator cooling fan33. A/C switch
4. TP sensor 19. Combination meter34. A/C evaporator outlet air temp. sensor (manual A/C model)
5. Throttle actuator 20. BCM35.Immobilizer coil antenna
6. MAP sensor 21. Ignition switch36. Main relay
7. EGR valve 22. Starter magnetic switch37. APP sensor
8. EVAP canister 23. HO2S-238. Oil control valve (VVT model)
9. Tank pressure control valve (built-in fuel pump) 24. DLC 39. TCM (A/T model)
10. Fuel pump (with pressure regulator) 25. Electric load40. Starting motor control relay
11. Ignition coil assembly 26. Fuel level sensor41. A/C refrigerant pressure sensor
12. Fuel injector 27. Brake light42. Throttle actuator control relay
13. HO2S-1 28. Brake light switch43. ABS/ESP® control module
14. Knock sensor 29. ECM44. Wheel speed sensor (VSS)
15. ECT sensor 30. Barometric pressure sensor