2000 SUZUKI SWIFT service indicator

0A-22 GENERAL INFORMATION
ABBREVIATIONS AND SYMBOLS MAY BE USED IN THIS MANUAL
ABBREVIATIONS
AABS Anti-lock Brake System
EEFE Heater Early Fuel Evaporation Heater
(Positive Temperature Coefficient,
PTC Heater) ATDC After Top Dead Center
API American Petroleum Institute
ATF Automatic Transmission Fluid EPS Electronic Power Steering
ALR Automatic Locking Retractor EVAP Evaporative Emission
AC Alternating Current EVAP Canister Evaporative Emission Canister
(Charcoal Canister)
A/T Automatic TransmissionF
4WD 4 Wheel Drive
A/C Air Conditioning
GGEN Generator
ABDC After Bottom Dead Center GND Ground
A/F Air Fuel Mixture Ratio
HHC Hydrocarbons
A-ELR Automatic-Emergency Locking
RetractorHO2S Heated Oxygen Sensor
IIAC Valve Idle Air Control Valve (Idle Speed
Control Solenoid Valve ISC Sole-
noid Valve)
BB+ Battery Positive Voltage
BTDC Before Top Dead Center
BBDC Before Bottom Dead Center IAT Sensor Intake Air Temperature Sensor
(Air temperature Sensor, ATS)
CCKT Circuit
CKP sensor Crankshaft Position Sensor ICM Immobilizer Control Module
CMP sensor Camshaft Position Sensor IG Ignition
CO Carbon Monoxide ISC Actuator Idle Speed Control Actuator
CPP switch Clutch Pedal Position Switch
(Clutch Switch, Clutch Start
Switch)LLH Left Hand
LSPV Load Sensing Proportioning Valve
CPU Central Processing Unit
MMAF Sensor Mass Air Flow Sensor (Air Flow
Sensor, AFS, Air Flow Meter,
AFM) CRS Child Restraint System
DDC Direct Current
DLC Data Link Connector (Assembly
Line Diag. Link, ALDL, Serial Data
Link, SDL)MAP Sensor Manifold Absolute Pressure Sen-
sor (Pressure Sensor, PS)
Max Maximum
DOHC Double Over Head Camshaft MFI Multiport Fuel Injection
(Multipoint Fuel Injection)
DOJ Double Offset Joint
DRL Daytime Running Light MIN Minimum
DTC Diagnostic Trouble Code (Diag-
nostic Code)MIL Malfunction Indicator Lamp
(“SERVICE ENGINE SOON”
Light)
EEBCM Electronic Brake Control Module,
ABS Control Module M/T Manual Transmission
EBD Electronic Brake Force Distribu-
tionNNOx Nitrogen Oxides
ECM Engine Control Module
OOBD On-Board Diagnostic System
(Self-Diagnosis Function)
ECT sensor Engine Coolant Temperature Sen-
sor (Water Temp. Sensor, WTS)
O/D Overdrive
EGR Exhaust Gas Recirculation OHC Over Head Camshaft
EGRT sensor EGR Temperature Sensor (Recir-
culated Exhaust Gas Temp. Sen-
sor, REGTS)O2S Oxygen Sensor
PPNP Park/Neutral Position
P/S Power Steering

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-1
6F1
6F2
6G
6H
6K
7A
7A1
3B1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 3B1
ELECTRICAL POWER STEERING (P/S) SYSTEM
CONTENTS
GENERAL DESCRIPTION .............................3B1-2
SYSTEM COMPONENTS ........................... 3B1-2
WIRING DIAGRAM ..................................... 3B1-3
DIAGNOSIS ....................................................3B1-4
ON-BOARD DIAGNOSTIC SYSTEM .......... 3B1-4
PRECAUTIONS IN DIAGNOSING
TROUBLES ................................................. 3B1-4
SYSTEM CHECK FLOW TABLE ................ 3B1-5
MALFUNCTION INDICATOR LAMP
(“EPS” WARNING LAMP) CHECK.............. 3B1-7
DTC CHECK ............................................... 3B1-8
DTC CLEARANCE ...................................... 3B1-9
SERIAL DATA LINK CIRCUIT CHECK ..... 3B1-10
DTC TABLE .............................................. 3B1-11
TABLE A - MALFUNCTION INDICATOR
LAMP DOES NOT COME ON AT
IGNITION SWITCH ON BUT LEAVING
ENGINE OFF ............................................ 3B1-13
TABLE B - MALFUNCTION INDICATOR
LAMP FLASHES AT IGNITION SWITCH
ON ............................................................. 3B1-15
TABLE C - MALFUNCTION INDICATOR
LAMP DOES NOT FLASH, JUST
REMAINS ON OR JUST REMAINS OFF
EVEN WITH DIAGNOSIS SWITCH
TERMINAL GROUNDED .......................... 3B1-15
DTC C1111 (DTC No.11) TORQUE
SENSOR MAIN CIRCUIT FAILURE ......... 3B1-16
DTC C1113 (DTC No.13) TORQUE
SENSOR MAIN AND SUB CIRCUIT
FAILURE ................................................... 3B1-16DTC C1115 (DTC No.15) TORQUE
SENSOR SUB CIRCUIT FAILURE........... 3B1-16
DTC C1114 (DTC No.14) TORQUE
SENSOR 5V POWER SUPPLY CIRCUIT
FAILURE ................................................... 3B1-17
DTC C1116 (DTC No.16) TORQUE
SENSOR 8V POWER SUPPLY CIRCUIT
FAILURE ................................................... 3B1-18
DTC C1121/C1123/C1124
(DTC No.21/23/24) VSS CIRCUIT
FAILURE ................................................... 3B1-19
DTC C1122 (DTC No.22) ENGINE
SPEED SIGNAL CIRCUIT FAILURE ........ 3B1-20
DTC C1141/C1142/C1143/C1144/C1145
(DTC No.41/42/43/44/45) MOTOR
CIRCUIT FAILURE ................................... 3B1-21
DTC C1151 (DTC No.51) CLUTCH
CIRCUIT FAILURE ................................... 3B1-22
DTC C1153(DTC No.53) P/S CONTROL
MODULE POWER SUPPLY CIRCUIT
FAILURE ................................................... 3B1-24
DTC C1152/C1154/C1155
(DTC No.52/54/55) P/S CONTROL
MODULE FAILURE .................................. 3B1-24
TROUBLE DIAGNOSIS (FOR TROUBLE
NOT INDICATED BY ON BOARD
DIAGNOSTIC SYSTEM)........................... 3B1-25
INSPECTION OF P/S CONTROL
MODULE AND ITS CIRCUITS ................. 3B1-26
STEERING WHEEL PLAY
INSPECTION ............................................ 3B1-28 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).

3B1-4 ELECTRICAL POWER STEERING (P/S) SYSTEM
DIAGNOSIS
The P/S system in this vehicle is controlled by P/S control module. P/S control module has an on-board diagnos-
tic system which detects a malfunction in this system.
When diagnosing troubles, be sure to have full understanding of the outline of “ON-BOARD DIAGNOSTIC SYS-
TEM” and each item in “PRECAUTION IN DIAGNOSING TROUBLE” and execute diagnosis according to “SYS-
TEM CHECK FLOW TABLE”.
ON-BOARD DIAGNOSTIC SYSTEM
P/S control module performs on-board diagnosis (self-diagnosis)
on the system and operates “EPS” warning lamp (1) (malfunction
indicator lamp) as follows.
Malfunction indicator lamp (“EPS” warning lamp) lights when
the ignition switch is turned to ON position (but the engine at
stop) regardless of the condition of P/S control system. This
is only to check the malfunction indicator lamp (“EPS” warn-
ing lamp) bulb and its circuit.
If the areas monitored by P/S control module is free from any
trouble after the engine start (while engine is running), mal-
function indicator lamp (“EPS” warning lamp) turns OFF.
When P/S control module detects a trouble which has
occurred in the areas it monitors, malfunction indicator lamp
(“EPS” warning lamp) turns ON while the engine is running
to warn the driver of such occurrence of trouble and at the
same time it stores the exact trouble area in memory inside
of P/S control module.
PRECAUTIONS IN DIAGNOSING TROUBLES
Take a note of DTC indicated first.
Be sure to read “PRECAUTIONS FOR ELECTRONIC CIRCUIT SERVICE” in Section 0A before inspection
and observe what is written there.
When two or more troubles have occurred, their DTCs are indicated 3 times each starting with the smallest
code number and up.
DTC C1122 (DTC No.22) (engine speed signal failure) is indicated when ignition switch is ON position and
engine is not running but if indication changes to a normal one when engine is started, it means nothing
abnormal.
As DTC is stored in memory of P/S control module, be sure to clear memory after repair by performing the
procedure described in “DTC CLEARANCE”.
1

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

6-6 ENGINE GENERAL INFORMATION AND DIAGNOSIS
FUEL PRESSURE RELIEF PROCEDURE
After making sure that engine is cold, release fuel pressure as fol-
lows.
1) Place transmission gear shift lever in “Neutral” (Shift selector
lever to “P” range for A/T model), set parking brake, and
block drive wheels.
2) Remove relay box cover.
3) Disconnect fuel pump relay (1) from relay box.
4) Remove fuel filler cap to release fuel vapor pressure in fuel
tank and then reinstall it.
5) Start engine and run it till it stops for lack of fuel. Repeat
cranking engine 2-3 times for about 3 seconds each time to
dissipate fuel pressure in lines. Fuel connections are now
safe for servicing.
6) Upon completion of servicing, connect fuel pump relay (1) to
relay box and install relay box cover.
FUEL LEAKAGE CHECK PROCEDURE
After performing any service on fuel system, check to make sure
that there are no fuel leakages as follows.
1) Turn ON ignition switch for 3 seconds (to operate fuel pump)
and then turn it OFF.
Repeat this (ON and OFF) 3 or 4 times and apply fuel pres-
sure to fuel line. (till fuel pressure is felt by hand placed on
fuel feed hose.)
2) In this state, check to see that there are no fuel leakages
from any part of fuel system.
ENGINE DIAGNOSIS
GENERAL DESCRIPTION
This vehicle is equipped with an engine and emission control system which are under control of ECM.
The engine and emission control system in this vehicle are controlled by ECM. ECM has an On-Board Diagnos-
tic system which detects a malfunction in this system and abnormality of those parts that influence the engine
exhaust emission. When diagnosing engine troubles, be sure to have full understanding of the outline of “On-
Board Diagnostic System” and each item in “Precaution in Diagnosing Trouble” and execute diagnosis accord-
ing to “ENGINE DIAGNOSTIC FLOW TABLE”.
There is a close relationship between the engine mechanical, engine cooling system, ignition system, exhaust
system, etc. and the engine and emission control system in their structure and operation. In case of an engine
trouble, even when the malfunction indicator lamp (MIL) doesn’t turn ON, it should be diagnosed according to
this flow table.CAUTION:
This work must not be done when engine is hot. If done
so, it may cause adverse effect to catalyst.
1

6-10 ENGINE GENERAL INFORMATION AND DIAGNOSIS
ON-BOARD DIAGNOSTIC SYSTEM (VEHICLE
WITHOUT IMMOBILIZER INDICATOR LAMP)
ECM diagnosis troubles which may occur in the area including
the following parts when the ignition switch is ON and the engine
is running, and indicates the result by turning on or flashing mal-
function indicator lamp (1).
Heated oxygen sensor (if equipped)
ECT sensor
TP sensor
IAT sensor
MAP sensor
CMP sensor
CKP sensor
Knock sensor (if equipped)
VSS
CPU (Central Processing Unit) of ECM
ECM and malfunction indicator lamp (1) operate as follows.
Malfunction indicator lamp (1) lights when the ignition switch
is turned ON (but the engine at stop) with the diagnosis
switch terminal ungrounded regardless of the condition of
Engine and Emission control system. This is only to check
the malfunction indicator lamp (1) bulb and its circuit.
If the above areas of Engine and Emission control system
are free from any trouble after the engine start (while engine
is running), malfunction indicator lamp (1) turns OFF.
When ECM detects a trouble which has occurred in the
above areas, it makes malfunction indicator lamp (1) turn ON
while the engine is running to warn the driver of such occur-
rence of trouble and at the same time it stores the trouble
area in ECM back-up memory. (The memory is kept as it is
even if the trouble was only temporary and disappeared
immediately. And it is not erased unless the power to ECM is
shut off for specified time below.)
ECM also indicates trouble area in memory by means of
flashing of malfunction indicator lamp (1) at the time of
inspection. (i.e. when diagnosis switch terminal (2) is con-
nected to ground terminal (3) with a service wire and ignition
switch is turned ON.)
NOTE:
When a trouble occurs in the above areas and disap-
pears soon while the diagnosis switch terminal is
ungrounded and the engine is running, malfunction
indicator lamp (1) lights and remains ON as long as the
trouble exists but it turns OFF when the normal condi-
tion is restored.
Time required to erase diagnostic trouble code mem-
ory thoroughly varies depending on ambient tempera-
ture as follows.
ODO TRIP AB
1
32

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-11
DATA LINK CONNECTOR (DLC)
ELC (1) is in compliance with SAEJ1962 in its installation posi-
tion, the shape of connector and pin assignment.
Serial data line (K line of ISO 9141) is used for SUZUKI scan tool
(Tech-1) to communicate with ECM, TCM, ABS control module
and Air bag SDM.
SUZUKI serial data line is used for SUZUKI scan tool (Tech -1) to
communicate with immobilizer control module.
PRECAUTION IN DIAGNOSING TROUBLE
Do not disconnect couplers from ECM, battery cable from battery, ECM ground wire harness from engine or
main fuse before confirming diagnostic information (DTC, freeze frame data, etc.) stored in ECM memory.
Such disconnection will erase memorized information in ECM memory.
Diagnostic information stored in ECM memory can be cleared as well as checked by using SUZUKI scan
tool (Tech-1) or generic scan tool (Vehicle with immobilizer indicator lamp). Before using scan tool, read its
Operator’s (Instruction) Manual carefully to have good understanding as to what functions are available and
how to use it.
Priorities for diagnosing troubles (Vehicle with immobilizer indicator lamp).
If two or more DTCs are stored, proceed to the flow table of the DTC which has detected earliest in the order
(it can be identified by referring to freeze frame data) and follow the instruction in that table.
If no instructions are given, troubleshoot diagnostic trouble codes according to the following priorities.
–Diagnostic trouble codes (DTCs) other than DTC P0171/P0172 (Fuel system too lean/too rich), DTC
P0300/P0301/P0302/P0303/P0304 (Misfire detected) and DTC P0400 (EGR flow malfunction)
–DTC P0171/P0172 (Fuel system too lean/too rich) and DTC P0400 (EGR flow malfunction)
–DTC P0300/P0301/P0302/P0303/P0304 (Misfire detected)
Be sure to read “Precautions for Electrical Circuit Service” in Section 0A before inspection and observe what
is written there.
ECM Replacement
When substituting a known-good ECM, check for following conditions. Neglecting this check may cause
damage to a known-good ECM.
–Resistance value of all relays, actuators is as specified respectively.
–MAP sensor and TP sensor are in good condition and none of power circuits of these sensors is shorted
to ground.AMBIENT
TEMPERATURETIME TO CUT POWER TO ECM
Over 0°C (32°F) 60 sec. or longer
Under 0°C (32°F) Not specifiable. Select a place with
temperature higher than 0°C (32°F).
2. B+
3. Serial data line (K line of ISO 9141)
4. ECM ground
5. Body ground
6. SUZUKI serial data line
2
3456
1

6-16 ENGINE GENERAL INFORMATION AND DIAGNOSIS
[Without Using SUZUKI Scan Tool] (Vehicle without Immo-
bilizer Indicator Lamp)
1) Check malfunction indicator lamp referring to “Malfunction
Indicator Lamp Check” in this section.
2) With the ignition switch OFF position, disconnect SUZUKI
scan tool if connected and using service wire (4), connect
diagnosis switch terminal (1) to ground terminal (2) in moni-
tor coupler (3).
3) With the ignition switch ON position and leaving engine OFF,
read DTC from flashing pattern of malfunction indicator
lamp. Refer to “Diagnostic Trouble Code Table”.
If lamp remains ON, go to “Diagnostic Flow Table A-4”.
4) After completing the check, turn the ignition switch OFF posi-
tion and disconnect service wire from monitor coupler.
DIAGNOSTIC TROUBLE CODE (DTC) CLEARANCE
Using Scan Tool
1) Connect SUZUKI scan tool (Tech-1) or generic scan tool
(Vehicle with immobilizer indicator lamp) to data link connec-
tor in the same manner as when making this connection for
DTC check.
2) Turn ignition switch ON.
3) Erase DTC and pending DTC according to instructions dis-
played on scan tool. Refer to scan tool operator’s manual for
further details.
4) After completing the clearance, turn ignition switch off and
disconnect scan tool from data link connector. NOTE:
If abnormality or malfunction lies in two or more areas,
malfunction indicator lamp indicates applicable codes
three times each.
And flashing of these codes is repeated as long as
diagnosis terminal is grounded and ignition switch is
held at ON position.
Take a note of diagnostic trouble code indicated first.
2
14
3
NOTE:
DTC and freeze frame data stored in ECM memory are
also cleared in following cases. Be careful not to clear
them before keeping their record.
When power to ECM is cut off (by disconnecting bat-
tery cable, removing fuse or disconnecting ECM con-
nectors)
When the same malfunction (DTC) is not detected
again during 40 engine warm-up cycles. (Vehicle with
immobilizer indicator lamp)