2000 SUZUKI SWIFT sensor

6E1-2 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
GENERAL DESCRIPTION
The engine and emission control system is divided into 3 major sub-systems: air/fuel delivery system, electronic
control system and emission control system.
Air/fuel delivery system includes fuel pump, throttle body, etc. Electronic control system includes ECM, various
sensors and controlled devices.
Emission control system includes EVAP and PCV system.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-3
1. Tank pressure control valve
2. Fuel liquid separator
3. Fuel tank
4. Fuel pump
5. Fuel level sensor (gauge)
6. Fuel filter
7. Fuel pressure regulator
8. Throttle body
9. Fuel injector
10. MAP sensor
11. TP sensor
12. ISC actuator
(including CTP switch)
13. PCV valve
14. Exhaust manifold
15. Intake manifold
16. Heated oxygen sensor-117. Warm up three way catalytic
convertor (WU-TWC)
(if equipped)
18. Three way catalytic convertor
19. IAT sensor
20. ECT sensor
21. EFE heater
22. EVAP canister purge valve
23. EVAP canister
24. Heated oxygen sensor-2
25. Radiator fan motor
26. Ignition coil
27. Ignitor
28. Electric load
29. A / C amplifier (if equipped)
30. Camshaft position sensor
31. Crankshaft position sensor32. VSS (on A / T)
33. Transmission range sensor
(switch) (A / T)
34. Shift solenoid-A (A / T)
35. Shift solenoid-B (A / T)
36. Data link connector
37. VSS (in combination meter of
M / T vehicle)
38. PSP switch (if equipped)
39. Malfunction indicator lamp
40. Transmission range sensor
(switch) (A / T)
41. Main (Ignition) switch
42. Main fuse
43. Battery
44. Immobilizer indicator lamp

INFORMATION SENSORS
1. MAP sensor
2. TP sensor
3. IAT sensor
4. ECT sensor
5. Heated oxygen sensor-1
6. VSS
7. Ignition coil
8. Battery
9. Distributor (CMP sensor)
10. A / C controller (if equipped)
11. CKP sensor
12. CTP switch (in ISC actuator)
13. Heated oxygen sensor-2CONTROLLED DEVICES
a : Fuel injector
b : EVAP canister purge valve
c : Fuel pump relay
d : Malfunction indicator lamp
e : ISC actuator
f : Radiator fan control relay
g : Ignitor
h : EFE heater relay
i : ISC actuator relayOTHERS
A : ECM (PCM)
B : Main relay
C : EVAP canister
D : Injector resistor
E : EFE heater
F : Electric load diode
G : Data link connector
ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-5
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) vari-
ous controlled devices.
Functionally, it is divided into following sub systems:

Fuel injection control system

Idle speed control system
Fuel pump control system

A/C control system (if equipped)

Radiator fan control system

Evaporative emission control system

EFE heater control system

Oxygen sensor heater control system

Ignition control system

A / T control system
ELECTRONIC CONTROL SYSTEM

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-7
CON-
NECTOR
C02TERMI-
NAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26ECM ground
Power source (from main relay)
Blank
Blank
Blank
Blank
EVAP canister purge valve
Shift solenoid-B (A / T)
Shift solenoid-A (A / T)
Igniter
Idle speed control actuator
Fuel injector
Injector ground
Power source (from battery)
Power source (from main relay)
Idle speed control actuator relay
Malfunction indicator lamp
Immobilizer indicator lamp
Heater of HO2S-2
Radiator fan relay
Fuel pump relay
Main relay
Blank
Idle speed control actuator
EFE heater relay
Injector groundC031
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22Data link connector
Vehicle speed sensor (+) (A / T)
Vehicle speed sensor (M / T)
Transmission range sensor (switch)“2”
Transmission range sensor (switch)“N”
Transmission range sensor (switch)“P”
Blank
Blank
Heated oxygen sensor-2
Blank
Fuel level sensor (gauge)
Blank
Data link connector
Vehicle speed sensor (–) (A / T)
Transmission range sensor (switch)“L”
Transmission range sensor (switch)“D”
Transmission range sensor (switch)“R”
A / C ON (output) signal for A / C control module
(if equipped)
Electric load signal
A / C (input) signal from A / C control module
(if equipped)
Ignition switch
Blank
Blank CIRCUITCON-
NECTORTERMI-
NALCIRCUIT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16Power source for sensors
Camshaft position sensor (+)
Crankshaft position sensor (+)
Closed throttle position switch
Manifold absolute pressure sensor
Throttle position sensor
Engine coolant temp. sensor
Heater of HO2S-1
Sensor ground
Camshaft position sensor (–)
Crankshaft position sensor (–)
EFE heater (monitor)
Heated oxygen sensor-1
Intake air temp sensor
Power steering pressure switch (if equipped)
Engine start signal circuit
C01
1. CMP sensor (in Distributor)
2. CKP sensor
3. TP sensor
4. MAP sensor
5. ECT sensor
6. IAT sensor
7. HO2S-1
8. HO2S-2
9. Transmission range switch (A / T)
10. VSS (A / T)
11. A / C control module (if equipped)
12. Heater blower switch
13. Fuel level sensor
14. Speedometer
15. P.SP switch
16. Rear defogger switch
17. Light switch
18. DLC
19. Fuel injector20. Injector resistor
21. Conister purge valve
22. Fuel pump relay
23. Rediator fan relay
24. EFE heater relay
25. ISC actuator relay
26. ISC actuator
27. Ignition coil
28. Igniter
29. Immobilizer indicator lamp
30. MIL
31. Main relay
32. Shift solenoid A (A / T)
33. Shift solenoid B (A / T)
34. Starter motor
35. Ignition switch

6E1-12 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Fuel injector wire
2. Fuel injector
3. Upper O-ring
4. Lower O-ring
5. Throttle upper body
6. Gasket
7. Throttle lower body
8. ISC actuator
9. TP sensor
10. Injector sub wire coupler
11. O-ring
12. Injector wire cover
CAUTION:
As throttle stop screw and throttle lever screw are fac-
tory adjusted precisely, don’t remove or adjust them.
Throttle
stop
screw
Throttle lever
screwPositive
terminal Negative
terminal
Viewed from “A”
1. Throttle body
2. Vacuum nozzle
1. Injector coupler
2. TP sensor
3. Water hose
4. Vacuum hose
5. ISC actuator
6. Fuel return hose
7. Fuel feed hose
THROTTLE BODY
ON-VEHICLE INSPECTION

Check that throttle valve lever moves smoothly.

Vacuum passage inspection.
With fingers placed against vacuum nozzle, increase engine
speed a little and check that vacuum is applied.
REMOVAL
1) Relieve fuel pressure, referring to Section 6.
2) Disconnect battery negative cable at battery.
3) Remove air cleaner assembly referring to Section 6A.
4) Drain cooling system.
5) Disconnect following wire harness couplers:

TP sensor

Fuel injector

ISC actuator
6) Disconnect following hoses from throttle body.

Fuel feed and return hoses

Engine cooling water hoses

Vacuum hoses
7) Disconnect accelerator cable from throttle valve lever and cable
bracket.
8) Remove throttle body from intake manifold.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-13
1. Fuel injector wire
2. Fuel pressure regulator
3. TP sensor
4. Screws
5. ISC actuator
1. Injector chamber
2. Fuel return passage
3. Fuel feed passage
4. Vacuum passage for fuel pressure regulator
5. Vacuum passage for MAP sensor
6. Air induction passage
7. Vacuum passage
8. Fresh air passage
DISASSEMBLY
NOTE:

Be sure not to remove either fuel pressure regulator or idle
speed control actuator from throttle body. They are factory
adjusted precisely.

Be sure to replace gaskets and O-rings as well as worn or
damaged parts.

While disassembling and assembling throttle body, use spe-
cial care not to deform levers on throttle valve shaft or cause
damage to any other parts.
1) Remove fuel injector from throttle body according to procedure
described in FUEL INJECTOR REMOVAL.
2) Remove TP sensor.
3) After removing screws, separate upper and lower bodies.
CLEANING
Clean passages and fuel injector chamber by blowing compressed
air.
NOTE:

TP sensor, fuel pressure regulator, fuel injector, ISC actua-
tor, other components containing rubber (resin) or throttle
valve shaft seal must not be placed in a solvent or cleaner
bath. Chemical reaction will cause these parts to swell, hard-
en or get distorted.

Don’t put drills or wires into passages for cleaning. It causes
damage in passages.

6E1-14 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
(a)
1. Lower body
2. Gasket
1. Wire cover
2. Fuel injector wire
3. Screws
2. EFE heater
3. Gasket
1. Intake manifold
ASSEMBLY
1) Install injector wire and coupler to throttle body.
Use new O-ring.
Tighten injector wire coupler screw to specified torque.
Tightening Torque
(a): 2.0 N
.m (0.20 kg-m, 1.5 lb-ft)
2) Install new gasket to lower body.
3) Install upper body on gasket, using care not to cause gasket to
slip out of place.
4) Make sure to injector wire harness to fit in grooves of throttle
body and install wire cover to throttle body.
Tighten screws to specified torque.
Tightening Torque
(b): 3.5 N
.m (0.35 kg-m, 2.5 lb-ft)
5) Install fuel injector according to procedure described in FUEL
INJECTOR INSTALLATION.
6) Install TP sensor according to procedure described in
THROTTLE POSITION SENSOR INSTALLATION.
INSTALLATION
1) Clean mating surfaces and install throttle body gasket to EFE
heater. Use new gasket.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-15
1. Injector coupler
2. TP sensor
3. Water hose
4. Vacuum hose
5. ISC actuator
6. Fuel return hose
7. Fuel feed hose
1. Injector coupler
Good No good
2) Install throttle body to EFE heater and tighten bolts to specified
torque.
Tightening Torque
(a): 23 N
.m (2.3 kg-m, 17.0 lb-ft)
3) Install accelerator cable to throttle valve lever and cable brack-
et.
4) Connect fuel, cooling water and vacuum hoses to throttle body,
and clamp securely.
5) Connect TP sensor and injector couplers securely.
6) Refill cooling system referring to Section 6B.
7) Connect negative cable at battery.
8) With engine “OFF” and ignition switch “ON”, check for fuel
leaks around fuel line connection.
9) Install air cleaner assembly referring to Section 6A.
10) Upon completion of installation, start engine and check for fuel
leaks and engine coolant leaks.
Adjust cable play to specification according to procedure de-
scribed in ACCELERATOR CABLE ADJUSTMENT.
FUEL INJECTOR
ON-VEHICLE INSPECTION
1) With battery negative cable disconnected, disconnect injector
coupler.
2) Connect ohmmeter to each injector terminal and measure resis-
tance.
Resistance of injector: 0.5 – 1.5 Ω at 20C (68F)
If resistance is out of specification, replace fuel injector.
3) Connect injector coupler.
4) Remove air cleaner assembly without disconnecting IAT sensor
coupler.
5) Check that fuel is injected out in conical shape from fuel injector
when cranking or running engine.
If no fuel is injected, check wiring harness for continuity and cou-
plers for proper connection referring to “DIAGNOSTIC FLOW
TABLE B-1”.
If fuel is not injected out in conical shape, replace injector.
6) Check injector for fuel leakage after injection is stopped (i.e., af-
ter cranking or engine stop).
Replace if leakage exists.
Fuel leakage: Less than 1 drop/min.
7) Install air cleaner assembly.