2000 SUZUKI SWIFT heater

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
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14
15
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17
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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

6E1-14 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.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-23
1. Viewed from terminal side
1. Exhaust manifold
2. Heated oxygen sensor
Sensor-1
Sensor-2
HEATED OXYGEN SENSOR (SENSOR-1 AND
SENSOR-2)
OXYGEN SENSOR HEATER INSPECTION
1) Disconnect sensor coupler.
2) Using ohmmeter, measure resistance between terminals “V
B”
and “GND” of sensor coupler.
NOTE:
Temperature of sensor affects resistance value largely.
Make sure that sensor heater is at correct temperature.
Resistance of oxygen sensor heater:
11.7 – 14.3 Ω at 20C, 68F
If found faulty, replace oxygen sensor.
3) Connect sensor coupler securely.
REMOVAL
WARNING:
To avoid danger of being burned, do not touch exhaust system
when system is hot. Oxygen sensor removal should be per-
formed when system is cool.
1) Disconnect negative cable from battery.
2) Hoist vehicle when removing sensor-2.
3) Disconnect coupler of heated oxygen sensor and release its
wire harness from clamps.
4) Remove heated oxygen sensor from exhaust manifold.
INSTALLATION
Reverse removal procedure noting the following.

Tighten heated oxygen sensor to specified torque.
Tightening Torque for heated oxygen sensor
45 N
.m (4.5 kg-m, 32.5 lb-ft)

Connect coupler of heated oxygen sensor and clamp wire har-
ness securely.

After installing heated oxygen sensor, start engine and check that
no exhaust gas leakage exists.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-29
1. ISC actuator relay
2. Relay box
1. EFE heater
2. Rubber cover
3.“Red” wire
4.“Black” wire
ISC ACTUATOR RELAY
INSPECTION
1) Disconnect negative cable at battery.
2) Remove ISC actuator relay from relay box.
3) Structure of ISC actuator relay is the same as that of main relay.
Check its resistance and operation using the same procedure as
that for main relay.
EFE HEATER CONTROL SYSTEM
SYSTEM CIRCUIT INSPECTION
NOTE:
Before inspection, check to make sure that gear shift lever is
in neutral position (with A/T model, selector lever in “P” range)
and that parking brake lever is pulled all the way up.
1) Turn up rubber cover of EFE heater to expose terminal-to-wire
connections.
2) Connect voltmeter to EFE terminals and check for voltage under
each condition given below.
CONDITION
VOLTAGE
Fast idle condition
Coolant temp.: below 80C (176F)
Engine speed: over 750 r/min.Battery
voltage
After warming up (other than above)No voltage
If check results are not as specified in above table, check EFE
heater, relay and wire harness.
3) Cover EFE heater connections with rubber cover.
EFE HEATER
CAUTION:
Do not bend wire harness of EFE heater excessively.
ON-VEHICLE INSPECTION
1) Disconnect EFE heater coupler.
2) Check resistance of EFE heater.
If it is not as specified below, replace.
EFE heater resistance: 0.5 – 3.0 Ω at 20C (68F)
3) Connect EFE heater coupler securely.
REMOVAL
1) Remove throttle body according to procedure described pre-
viously.
In this case, however, it is not necessary to disconnect fuel
hoses and engine cooling water hoses from throttle body.
2) Disconnect EFE heater coupler.
3) Remove EFE heater from intake manifold.

6E1-30 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Insulator
2. Lower gasket
3. Heater
1. Intake manifold
2. EFE heater
1. EFE heater relay
2. Relay box
1. Radiator fan motor
INSPECTION

Check lower gasket for damage and deterioration. Replace as
necessary.

Check heater and insulator for crack, corrosion or any other dam-
age. Replace as necessary.
INSTALLATION
1) Clean mating surfaces of throttle body and intake manifold that
mate with EFE heater.
2) Install EFE heater to intake manifold.
Use new upper gasket.
3) Install throttle body according to procedure described previous-
ly.
4) Connect EFE heater coupler.
EFE HEATER RELAY
INSPECTION
1) Disconnect negative cable at battery.
2) Remove EFE heater relay from relay box.
3) Structure of EFE heater relay is the same as that of main relay.
Check its resistance and operation using the same procedure as
that for main relay.
If found defective, replace.
RADIATOR FAN CONTROL SYSTEM
SYSTEM INSPECTION
WARNING:
Keep hands, tools, and clothing away from engine cooling
fan to help prevent personal injury. This fan is electric and
can come on whether or not the engine is running. The fan
can start automatically in response to the ECT sensor with
the ignition switch in the “ON” position.
Connect SUZUKI scan tool (2) to DLC (3).
Start engine and keep it running to warm it up.
Now check to ensure that radiator fan is started when the coolant
temperature displayed on SUZUKI scan tool reaches 96C
(205F).
If check result is not satisfactory, check RFC relay, wire harness,
ECT sensor, ECM, coolant temp. meter and sender gauge unit.
Refer to “DTC P0480 FLOW TABLE” of Section 6 and “COOLANT
TEMP. METER AND GAUGE UNIT” of Section 8.

6E2-8 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
INFORMATION SENSORS
-1. MAP sensor
-2. TP sensor
-3. IAT sensor
-4. ECT sensor
-5. Heated oxygen sensor-1
5-1. Heated oxygen sensor-2
-6. VSS (A / T)
-7. Transmission range switch (A / T)
-8. Battery
-9. CMP sensor
-10. CKP sensor
-11. Fuel level sensor (gauge) (in fuel tank)
-12. PSP switch
-13. A / C control module (if equipped)
-14. VSS (speedometer) (M / T)OTHERS
A: ECM (PCM)
B: Main relay
C: EVAP canister
D: Data link connector CONTROL DEVICES
a: Fuel injector
b: EVAP canister purge valve
c: Fuel pump relay
d: EGR valve (step motor)
e: Malfunction indicator lamp
f: Ignition coil assembly
g: Radiator fan control relay
h: IAC valve
The electronic control system consists of 1) various
sensors which detect the state of engine and driving
conditions, 2) ECM (PCM) which controls various de-
vices according to the signals from the sensors and
3) various controlled devices.
Functionally, it is divided into nine sub systems:

Fuel injection control system

Idle speed control system
Fuel pump control system

A / C control system (if equipped)

Radiator fan control system

EGR system

Evaporative emission control system

Oxygen sensor heater control system

Ignition control system
Also, with A / T model, PCM controls A / T.
ELECTRONIC CONTROL SYSTEM