2000 SUZUKI SWIFT catalytic converter

GENERAL INFORMATION 0A-1
0A
6F2
6G
6H
6K
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 0A
GENERAL INFORMATION
CONTENTS
HOW TO USE THIS MANUAL .........................0A-2
PRECAUTIONS ................................................0A-3
PRECAUTION FOR VEHICLES EQUIPPED
WITH A SUPPLEMENTAL RESTRAINT
(AIR BAG) SYSTEM ..................................... 0A-3
DIAGNOSIS .............................................. 0A-3
SERVICING AND HANDLING .................. 0A-4
GENERAL PRECAUTIONS .......................... 0A-6
PRECAUTIONS FOR CATALYTIC
CONVERTER ................................................ 0A-9
PRECAUTION FOR INSTALLING MOBILE
COMMUNICATION EQUIPMENT ................. 0A-9
PRECAUTION IN SERVICING FULL-TIME
4WD VEHICLE ............................................ 0A-10
PRECAUTIONS FOR ELECTRICAL
CIRCUIT SERVICE ..................................... 0A-11
ELECTRICAL CIRCUIT INSPECTION
PROCEDURE ............................................. 0A-13
OPEN CIRCUIT CHECK ......................... 0A-13
CONTINUITY CHECK ............................. 0A-14
VOLTAGE CHECK .................................. 0A-15SHORT CIRCUIT CHECK (WIRE
HARNESS TO GROUND)....................... 0A-16
INTERMITTENT AND POOR
CONNECTION ............................................ 0A-16
IDENTIFICATION INFORMATION ................. 0A-18
VEHICLE IDENTIFICATION NUMBER ...... 0A-18
ENGINE IDENTIFICATION NUMBER ........ 0A-18
TRANSMISSION IDENTIFICATION
NUMBER .................................................... 0A-18
WARNING, CAUTION AND INFORMATION
LABELS.......................................................... 0A-19
VEHICLE LIFTING POINTS ........................... 0A-20
ABBREVIATIONS AND SYMBOLS MAY
BE USED IN THIS MANUAL.......................... 0A-22
FASTENER INFORMATION .......................... 0A-25
METRIC FASTENERS................................ 0A-25
FASTENER STRENGTH
IDENTIFICATION ....................................... 0A-25
STANDARD TIGHTENING TORQUE......... 0A-25

GENERAL INFORMATION 0A-9
 Use care not to expose connectors and electrical parts
to water which will be a cause of a trouble.
 Always be careful not to handle electrical parts (com-
puter, relay, etc.) in a rough manner or drop them.
PRECAUTIONS FOR CATALYTIC CONVERTER
For vehicles equipped with a catalytic converter, use only unleaded gasoline and be careful not to let a
large amount of unburned gasoline enter the converter or it can be damaged.
 Conduct a spark jump test only when necessary, make it as short as possible, and do not open the
throttle.
 Conduct engine compression checks within the shortest possible time.
 Avoid situations which can result in engine misfire (e.g. starting the engine when the fuel tank is
nearly empty.)
PRECAUTION FOR INSTALLING MOBILE COMMUNICATION EQUIPMENT
When installing mobile communication equipment such as CB (Citizens-Band)-radio or cellular-tele-
phone, be sure to observe the following precautions.
Failure to follow cautions may adversely affect electronic control system.
 Keep the antenna as far away as possible from the vehicle’s electronic control unit.
 Keep the antenna feeder more than 20 cm (7.9 in) away from electronic control unit and its wire har-
nesses.
 Do not run the antenna feeder parallel with other wire harnesses.
 Confirm that the antenna and feeder are correctly adjusted.

GENERAL INFORMATION 0A-23
PPSP Switch Power Steering Pressure Switch
(P/S Pressure Switch)
PCM Powertrain Control Module
PCV Positive Crankcase Ventilation
R
RH Right Hand
SSAE Society of Automotive Engineers
SDM Sensing and Diagnostic Module
(Air bag controller, Air bag con-
trol module)
SFI Sequential Multiport Fuel Injec-
tion
SOHC Single over Head Camshaft
TTBI Throttle Body Fuel Injection
(Single-Point Fuel Injection, SPI)
TCC Torque Converter Clutch
TCM Transmission Control Module
(A/T Controller, A/T Control
Module)
TP Sensor Throttle Position Sensor
TVV Thermal Vacuum Valve (Ther-
mal Vacuum Switching Valve,
TVSV, Bimetal Vacuum Switch-
ing Valve, BVSV)
TWC Three Way Catalytic Converter
(Three Way Catalyst)
2WD 2 Wheel Drive
VVIN Vehicle Identification Number
VSS Vehicle Speed Sensor
WWU-OC Warm Up Oxidation Catalytic
Converter
WU-TWC Warm Up Three Way Catalytic
Converter

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-1
6
6F2
6G
6H
6K
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10A
10B
SECTION 6
ENGINE GENERAL INFORMATION AND
DIAGNOSIS
ENGINE GENERAL INFORMATION AND ENGINE DIAGNOSIS................................................. Section 6
ENGINE MECHANICAL ................................................................................................................. Section 6A1
ENGINE COOLING......................................................................................................................... Section 6B
ENGINE FUEL ................................................................................................................................ Section 6C
ENGINE AND EMISSION CONTROL SYSTEM ............................................................................ Section 6E1
IGNITION SYSTEM ........................................................................................................................ Section 6F1
CRANKING SYSTEM ..................................................................................................................... Section 6G
CHARGING SYSTEM ..................................................................................................................... Section 6H
EXHAUST SYSTEM ....................................................................................................................... Secton 6K
CONTENTS
GENERAL INFORMATION ................................ 6-4
STATEMENT ON CLEANLINESS AND
CARE .............................................................. 6-4
GENERAL INFORMATION ON ENGINE
SERVICE ........................................................ 6-4PRECAUTION ON FUEL SYSTEM
SERVICE .................................................... 6-5
FUEL PRESSURE RELIEF
PROCEDURE ............................................. 6-6
FUEL LEAKAGE CHECK PROCEDURE.... 6-6 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System :
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
Whether the following systems (parts) are used in the particular vehicle or not depends on vehicle
specifications. Be sure to bear this in mind when performing service work.
EGR valve
Heated oxygen sensor(s) or CO adjusting resistor
Three way catalytic converter
Immobilizer indicator lamp (vehicle with immobilizer indicator lamp can be identified also by HO2S-
2)
Knock sensor

6-30 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Improper engine
idling or engine fails
to idleFaulty spark plug Spark plugs in Section 6F1.
Leaky or disconnected high-tension cord High-tension cords in Section 6F1.
Faulty ignition coil with ignitor Ignition coil in Section 6F1.
Fuel pressure out of specification Diagnostic Flow Table B-3.
Leaky manifold, throttle body, or cylinder
head gasket
Malfunctioning EGR valve (if equipped) EGR system in Section 6E1.
Faulty idle air control system Diagnostic Flow Table B-4.
Faulty evaporative emission control system EVAP control system in Section 6E1.
Faulty EGR system (if equipped) EGR system in Section 6E1.
Faulty fuel injector(s) Diagnostic Flow Table B-1.
Poor performance of ECT sensor, TP sensor
or MAP sensorECT sensor, TP sensor or MAP sensor
in Section 6E1.
Faulty ECM
Loose connection or disconnection of vacuum
hoses
Malfunctioning PCV valve PCV system in Section 6E1.
Engine overheating Refer to “Overheating” section.
Low compression Previously outlined.
Excessive hydrocar-
bon (HC) emission
or carbon monox-
ide (CO)Faulty spark plug Spark plugs in Section 6F1.
Leaky or disconnected high-tension cord High-tension cords in Section 6F1.
Faulty ignition coil with ignitor Ignition coil assembly in Section 6F1.
Low compression Refer to “Low compression” section.
Lead contamination of three way catalytic
converterCheck for absence of filler neck restric-
tor.
Faulty evaporative emission control system EVAP control system in Section 6E1.
Fuel pressure out of specification Diagnostic Flow Table B-3.
Closed loop system (A/F feed back compen-
sation) fails
Faulty TP sensor
Poor performance of ECT sensor or MAP
sensorTP sensor in Section 6E1.
ECT sensor or MAP sensor in Section
6E1.
Faulty injector(s) Diagnostic Flow Table B-1
Faulty ECM
Engine not at normal operating temperature
Clogged air cleaner
Vacuum leaks
Excessive nitrogen
oxides (NOx) emis-
sionImproper ignition timing See section 6F1.
Lead contamination of catalytic converter Check for absence of filler neck restric-
tor.
Faulty EGR system (if equipped) EGR system in Section 6E1.
Fuel pressure out of specification Diagnostic Flow Table B-3.
Closed loop system (A/F feed back compen-
sation) fails
Faulty TP sensor
Poor performance of ECT sensor or MAP
sensorTP sensor in Section 6E1.
ECT sensor or MAP sensor in Section
6E1.
Faulty injector(s) Diagnostic Flow Table B-1
Faulty ECM Condition Possible Cause Correction

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-81
DTC P0300 RANDOM MISFIRE DETECTED (MISFIRE DETECTED AT 2 OR
MORE CYLINDERS)
DTC P0301 CYLINDER 1 MISFIRE DETECTED
DTC P0302 CYLINDER 2 MISFIRE DETECTED
DTC P0303 CYLINDER 3 MISFIRE DETECTED
DTC P0304 CYLINDER 4 MISFIRE DETECTED
WIRING DIAGRAM
CIRCUIT DESCRIPTION
ECM monitors crankshaft revolution speed and engine speed via the crankshaft position sensor and cylinder No.
via the camshaft position sensor. Then it calculates the change in the crankshaft revolution speed and from how
many times such change occurred in every 200 or 1000 engine revolutions, it detects occurrence of misfire.
When ECM detects a misfire (misfire rate per 200 revolutions) which can cause overheat and damage to the
three way catalytic converter, it makes the malfunction indicator lamp (MIL) flash as long as misfire occurs at
that rate.
After that, however, when the misfire rate drops, MIL remains ON until it has been judged as normal 3 times
under the same driving conditions.
Also, when ECM detects a misfire (misfire rate per 1000 revolutions) which will not cause damage to three way
catalytic converter but can cause exhaust emission to be deteriorated, it makes MIL light according to the 2 driv-
ing cycle detection logic.
1. Ignition coil No. 1
2. Ignition coil No. 2
3. CKP sensor
4. CMP sensor
5. Fuel injector
C42-20
C42-19
ECM
IG1
5V
5V
GRN/YEL
BLK/WHT
GRN/WHT
IG1 2
+B
C42-9
C42-21
C42-8
C42-23 C42-31 BLU/YEL
BLU/WHT
BLU/RED
BLU/ORN
YEL/BLK
5V
C42-11
RED/YEL
5V
BLK/RED
3
45
5
1

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-97
DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
WIRING DIAGRAM / CIRCUIT DESCRIPTION
ECM monitors oxygen concentration in the exhaust gas which has passed the three way catalytic converter by
HO2S-2 (2).
When the catalyst is functioning properly, the variation cycle of HO2S-2 (2) output voltage (oxygen concentra-
tion) is slower than that of HO2S-1 (1) output voltage because of the amount of oxygen in the exhaust gas which
has been stored in the catalyst (3).
REFERENCE
[A] : Oscilloscope Waveforms
C42 (31P) C41 (24P) G02 (17P)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 26 28 27 29 30 315 6
1 2 3 4 5 6 7
11 12
9 10 11 13 12 14 15 16
16 171 2
7 8
13 14 3 4
9 10
15 17 188
19 20 21 22 23 24
1
2
3
ECM
WHT
ORNC42-10 C42-13
BRN
C41-13
YEL
DTC DETECTING CONDITION POSSIBLE CAUSE
While vehicle running at constant speed under other than
high load.
Time from rich or lean switching command is output till HO2S-
2 output voltage crosses 0.45 V is less than specified value.
✱2 driving cycle detection logic, monitoring once/1 drivingExhaust gas leak
Three way catalytic converter malfunction
Fuel system malfunction
HO2S-2 malfunction
HO2S-1 malfunction

ENGINE AND EMISSION CONTROL SYSTEM 6E1-1
6F1
6F2
6G
6H
6E1
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 6E1
ENGINE AND EMISSION CONTROL SYSTEM
CONTENTS
GENERAL DESCRIPTION ............................ 6E1-2
AIR INTAKE SYSTEM ............................... 6E1-5
FUEL DELIVERY SYSTEM ....................... 6E1-6
FUEL PUMP ........................................... 6E1-6
ELECTRONIC CONTROL SYSTEM .......... 6E1-7
ENGINE & EMISSION CONTROL
INPUT/OUTPUT TABLE ........................ 6E1-8
ECM INPUT/OUTPUT CIRCUIT
DIAGRAM............................................... 6E1-9
ECM TERMINAL ARRANGEMENT
TABLE .................................................. 6E1-13
ON-VEHICLE SERVICE .............................. 6E1-15
ACCELERATOR CABLE
ADJUSTMENT ..................................... 6E1-15
IDLE SPEED/IDLE AIR CONTROL
(IAC) DUTY INSPECTION ................... 6E1-15
IDLE MIXTURE INSPECTION /
ADJUSTMENT (VEHICLE WITHOUT
HEATED OXYGEN SENSOR) ............. 6E1-17
AIR INTAKE SYSTEM ............................. 6E1-18
THROTTLE BODY ............................... 6E1-18IDLE AIR CONTROL VALVE (IAC
VALVE) ................................................ 6E1-20
FUEL DELIVERY SYSTEM ..................... 6E1-21
FUEL PRESSURE INSPECTION ........ 6E1-21
FUEL PUMP WITH PRESSURE
REGULATOR ....................................... 6E1-22
FUEL INJECTOR ................................. 6E1-23
ELECTRONIC CONTROL SYSTEM ....... 6E1-27
ENGINE CONTROL MODULE
(ECM) ................................................... 6E1-27
MANIFOLD ABSOLUTE PRESSURE
SENSOR (MAP SENSOR)................... 6E1-27
THROTTLE POSITION SENSOR (TP
SENSOR) ............................................. 6E1-28
INTAKE AIR TEMPERATURE
SENSOR (IAT SENSOR) ..................... 6E1-29
ENGINE COOLANT TEMPERATURE
SENSOR (ECT SENSOR) ................... 6E1-30
HEATED OXYGEN SENSOR (HO2S-1
AND HO2S-2) ...................................... 6E1-31
CAMSHAFT POSITION SENSOR ....... 6E1-32 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System :
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
Whether the following system (parts) are used in the particular vehicle or not depends on vehicle
specifications. Be sure to bear this in mind when performing service work.
EGR valve
Heated oxygen sensor(s) or CO adjusting resistor
Three way catalytic converter
Immobilizer indicator lamp
Knock sensor