immobilizer SUZUKI SWIFT 2000 1.G RG413 Service User Guide

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

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-13
1. CUSTOMER COMPLAINT ANALYSIS
Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this
purpose, use of such an inspection form will facilitate collecting information to the point required for proper anal-
ysis and diagnosis.
2. DTC/FREEZE FRAME DATA CHECK, RECORD AND CLEARANCE
First, check DTC (including pending DTC), referring to “DTC check” section. If DTC is indicated, print it and
freeze frame data or write them down and then clear them by referring to “DTC clearance” section. DTC indi-
cates malfunction that occurred in the system but does not indicate whether it exists now or it occurred in the
past and the normal condition has been restored now. To check which case applies, check the symptom in
question according to Step 4 and recheck DTC according to Step 5.
Attempt to diagnose a trouble based on DTC in this step only or failure to clear the DTC in this step will lead to
incorrect diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting.
3. and 4. VISUAL INSPECTION
As a preliminary step, be sure to perform visual check of the items that support proper function of the engine
referring to “Visual Inspection” section.
5. TROUBLE SYMPTOM CONFIRMATION
Based on information obtained in Step 1 Customer complaint analysis and Step 2 DTC/freeze frame data check,
confirm trouble symptoms. Also, reconfirm DTC according to “DTC Confirmation Procedure” described in each
DTC Diagnosis section.
6. and 7. RECHECKING AND RECORD OF DTC/FREEZE FRAME DATA
Refer to “DTC check” section for checking procedure.
8. ENGINE BASIC INSPECTION AND ENGINE DIAGNOSIS TABLE
Perform basic engine check according to the “Engine Basic Inspection Flow Table” first. When the end of the
flow table has been reached, check the parts of the system suspected as a possible cause referring to ENGINE
DIAGNOSIS TABLE and based on symptoms appearing on the vehicle (symptoms obtained through steps of
customer complaint analysis, trouble symptom confirmation and/or basic engine check) and repair or replace
faulty parts, if any.
9. TROUBLESHOOTING FOR DTC (See each DTC Diag. Flow Table)
Based on the DTC indicated in Step 5 and referring to the applicable DTC diag. flow table in this section, locate
the cause of the trouble, namely in a sensor, switch, wire harness, connector, actuator, ECM or other part and
repair or replace faulty parts.
10. CHECK FOR INTERMITTENT PROBLEM
Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to
“INTERMITTENT AND POOR CONNECTION” in Section 0A and related circuit of DTC recorded in Step 2.
11. FINAL CONFIRMATION TEST
Confirm that the problem symptom has gone and the engine is free from any abnormal conditions. If what has
been repaired is related to the DTC, clear the DTC once, perform DTC confirmation procedure and confirm that
no DTC is indicated.NOTE:
If only Automatic transmission DTCs (P0702-P1709) or Immobilizer DTCs (P1620-P1623) are indicated
in this step, perform trouble diagnosis according to “Diagnosis” in Section 7B or Section 8G.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-15
MALFUNCTION INDICATOR LAMP (MIL) CHECK
1) Turn ON ignition switch (but the engine at stop) and check
that MIL lights.
If MIL does not light up (or MIL dims), go to “Diagnostic Flow
Table A-1” for troubleshooting.
If MIL flushes, go to “Diagnostic Flow Table A-3” (vehicle
without immobilizer indicator lamp).
2) Start engine and check that MIL turns OFF.
If MIL remains ON and no DTC is stored in ECM, go to
“Diagnostic Flow Table A-2” for troubleshooting.
DIAGNOSTIC TROUBLE CODE (DTC) CHECK
[Using SUZUKI Scan Tool]
1) Prepare SUZUKI scan tool (Tech-1).
2) With ignition switch OFF, connect it to data link connector
(DLC) (1) located on underside of instrument panel at
driver’s seat side.
Special tool
(A) : SUZUKI scan tool
(B) : Mass storage cartridge
(C) : 16/14 pin DLC cable
3) Turn ignition switch ON and confirm that MIL lights.
4) Read DTC, pending DTC and freeze frame data according to
instructions displayed on scan tool and print it or write it
down.
Refer to scan tool operator’s manual for further details.
If communication between scan tool and ECM is not possi-
ble, check if scan tool is communicable by connecting it to
ECM in another vehicle. If communication is possible in this
case, scan tool is in good condition. Then check data link
connector and serial data line (circuit) in the vehicle with
which communication was not possible.
5) After completing the check, turn ignition switch off and dis-
connect scan tool from data link connector.
ODO TRIP AB
1
(A)
(B) (C)

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)

6-20 ENGINE GENERAL INFORMATION AND DIAGNOSIS
FAIL-SAFE TABLE
When any of the following DTCs is detected, ECM enters fail-safe mode as long as malfunction continues to
exist but that mode is canceled when ECM detects normal condition after that.P1620
(No.84)ECU code not registered
Refer to Section 8G P1621
(No.83)No ECU code transmitted from Immobilizer
Control Module
P1622
(No.82)Fault in ECM
P1623
(No.81)ECU code not matched DTC NO. DETECTING ITEM DETECTING CONDITION
(DTC will set when detecting :)MIL
NOTE:
For (
) marked No. in DTC column, it is used for vehicle without immobilizer indication lamp.
DTC No.12 appears when none of the other codes is identified.
For vehicle with immobilizer indication lamp, star (
✱) marked DTCs can be read with SUZUKI scan
tool ECM application.
DTC NO. TROUBLE AREA FAIL-SAFE OPERATION SYMPTOM
P0105
(No.11)MAP SENSOR ECM uses value determined by throt-
tle opening and engine speed.
ECM stops EGR, EVAP purge and
idle air control.Hard starting/ rough or incorrect
idle/ excessive fuel consumption/
hesitation/ poor acceleration/
surge/ detonation or spark knock
P0110
(No.18)IAT SENSOR ECM controls actuators assuming
that intake air temperature is 20°C.Hard starting/ rough or incorrect
idle/ excessive fuel consumption/
hesitation poor acceleration/ deto-
nation or spark knock
P0115
(No.19)ECT SENSOR ECM controls actuators assuming
that engine coolant temperature is
80°C.
Radiator fan motor ON.Hard starting/ rough or incorrect
idle/ excessive fuel consumption/
hesitation poor acceleration/ deto-
nation or spark knock
P0120
(No.13)TP SENSOR ECM controls actuators assuming
that throttle opening is 20°.Rough or incorrect idle/ excessive
fuel consumption/ hesitation/ poor
acceleration
P0130,
P0134
(No.14)HEATED OXYGEN
SENOR-1–Hard starting/rough or incorrect
idle/ excessive fuel consumption/
hesitation/ poor acceleration
P0325
(No.17)KNOCK SENSOR–Detonation/ spark knock
P0335
(No.23)CKP SENSORFix ignition timing.
ECM changes injection control sys-
tem from sequential injection to
simultaneous one.Hard staring/ engine stall

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-23
ENGINE BASIC INSPECTION
This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has been
found in visual inspection.
Follow the flow table carefully.
Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Check battery voltage.
Is it 11 V or more?Go to Step 3. Charge or replace battery.
3 Is engine cranked? Go to Step 4. Go to “DIAGNOSIS” in
Section 6G.
4 Does engine start? Go to Step 5. Go to Step 7.
5 Check idle speed as follows :
1) Warm up engine to normal operating temp.
2) Shift transmission to neutral position for M/T
(“P” position for A/T).
3) All of electrical loads are switched off.
4) Check engine idle speed with scan tool.
See Fig. 1.
Is it 650 – 750 r/min (700 – 800 r/min. for A/T
vehicle)?Go to Step 6. Go to “ENGINE DIAGNO-
SIS TABLE”.
6 Check ignition timing as follows :
1) When SUZUKI scan tool is not available,
disconnect scan tool from DLC and connect
test switch terminal of monitor connector to
ground. See Fig. 2.
When using SUZUKI scan tool, select
“MISC” mode on SUZUKI scan tool and fix
ignition timing to initial one. See Fig. 3.
2) Using timing light (1), check initial ignition
timing. See Fig. 4.
Is it 5° ± 3° BTDC at specified idle speed?Go to “ENGINE DIAGNO-
SIS TABLE”.Check ignition control
related parts referring to
Section 6F1.
7 Is immobilizer control system equipped? Go to Step 8. Go to Step 9.
8 Check immobilizer system malfunction as fol-
lows.
1) Check immobilizer indicator lamp or MIL
(malfunction indicator lamp) for flashing.
Is it flashing when ignition switch is turned to
ON position?Go to “DIAGNOSIS” in
Section 8G.Go to Step 9.
9 Check fuel supply as follows :
1) Check to make sure that enough fuel is
filled in fuel tank.
2) Turn ON ignition switch for 2 seconds and
then OFF. See Fig. 5.
Is fuel pressure felt from fuel feed hose (1)
when ignition switch is turned ON?Go to Step 11. Go to Step 10.
10 Check fuel pump for operating.
Was fuel pump operating sound heard from fuel
filler for about 10 seconds after ignition switch
ON and stop?Go to “DIAG. FLOW
TABLE B-3”.Go to “DIAG. FLOW
TABLE B-2”.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-31
SCAN TOOL DATA
As the data values given below are standard values estimated on the basis of values obtained from the normally
operating vehicles by using a scan tool, use them as reference values. Even when the vehicle is in good condi-
tion, there may be cases where the checked value does not fall within each specified data range. Therefore,
judgment as abnormal should not be made by checking with these data alone.
Also, conditions in the below table that can be checked by the scan tool are those detected by ECM and output
from ECM as commands and there may be cases where the engine or actuator is not operating (in the condi-
tion) as indicated by the scan tool. Be sure to use the timing light to check the ignition timing.
NOTE:
With the generic scan tool, only star (
✱) marked data in the table below can be read.
The triangle (
∆) marked data in the table below can not be read for vehicle without immobilizer indi-
cator lamp.
When checking the data with the engine running at idle or racing, be sure to shift M/T gear to the
neutral gear position and A/T gear to the “Park” position and pull the parking brake fully. Also, if
nothing or “no load” is indicated, turn OFF A/C, all electric loads, P/S and all the other necessary
switches.
SCAN TOOL DATA VEHICLE CONDITION NORMAL CONDITION/
REFERENCE VALUES
✱FUEL SYSTEM B1
(FUEL SYSTEM STATUS)At specified idle speed after warming up CLOSED (closed loop)
✱CALC LOAD
(CALCULATED LOAD
VALUE)At specified idle speed with no load after
warming up3 – 9%
At 2500 r/min with no load after warming up 12 – 17%
✱COOLANT TEMP.
(ENGINE COOLANT
TEMP.)At specified idle speed after warming up 80 – 100°C, 176 – 212°F
✱SHORT FT B1
(SHORT TERM FUEL
TRIM)At specified idle speed after warming up– 20 – +20%
✱LONG FT B1
(LONG TERM FUEL TRIM)At specified idle speed after warming up– 15 – +15%
✱MAP
(INTAKE MANIFOLD
ABSOLUTE PRESSURE)At specified idle speed with no load after
warming up30 – 37 kPa,
220 – 280 mmHg
✱ENGINE SPEED At idling with no load after warming up Desired idle speed
±50 r/min
✱VEHICLE SPEED At stop 0 km/h, 0 MPH
✱IGNITION ADVANCE
(IGNITION TIMING
ADVANCE FOR NO.1 CYL-
INDER)At specified idle speed with no load after
warming up6 – 16° BTDC
✱INTAKE AIR TEMP. At specified idle speed after warming up Ambient temp. :
+15°C (59°F)
–5°C (23°F)
✱MAF
(MASS AIR FLOW RATE)At specified idle speed with no load after
warming up1 – 4 gm/sec
At 2500 r/min with no load after warming up 4 – 9 gm/sec

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-37
ECM VOLTAGE VALUES TABLE
For TYPE A (See NOTE)
NOTE:
Type A is other than follows.
Type B is right hand steering vehicle equipped with fasten seat belt light and immobilizer control sys-
tem.
TERMINAL NO. CIRCUIT NORMAL VOLT-
AGECONDITION
C421 Ground––
2 Ground––
3 Ground––
4 EVAP canister purge valve 10 – 14 V Ignition switch ON
5 Engine coolant temp. and barometric
pressure signal for TCM (A/T)Indication
deflection
repeated 0 V
and 10 – 14 VIgnition switch ON
6 Idle air control valve 0 – 13 V At specified idle speed after engine warmed up
7 Heater of HO2S-1 (if equipped) 10 – 14 V Ignition switch ON
8 Fuel injector NO.4 10 – 14 V Ignition switch ON
9 Fuel injector NO.1 10 – 14 V Ignition switch ON
10 Sensor ground––
11 Camshaft position sensor 0 – 0.8 V and
4 – 6 VIgnition switch ON
12 Knock sensor (if equipped) 2.1 - 2.9 V Ignition switch ON
13 Heated oxygen sensor-1 (if equipped) Refer to DTC P0130 diag. flow table
CO adjusting resistor (if equipped)––
14 Engine coolant temp. sensor 0.55 - 0.95 V Ignition switch ON
Engine coolant temp. : 80°C (176°F)
15 Intake air temp. sensor 2.0 – 2.7 V Ignition switch ON
Intake air temp. : 20°C (68°F)
16 Test switch terminal (Vehicle without
immobilizer indicator lamp)4 – 6 V Ignition switch ON
17 Electric load signal (+) 0V Ignition switch ON
Small light and rear defogger OFF
10 – 14 V Ignition switch ON
Small light and rear defogger ON
18 A/C triple pressure switch 10 – 14 V A/C not operated
19 Ignition coil #2––
20 Ignition coil #1––
21 Fuel injector NO.2 10 – 14 V Ignition switch ON
22 Power source for sensor 4.75 – 5.25 V Ignition switch ON
23 Crankshaft position sensor––
24–– –
25 Shield ground––
26 Manifold absolute pressure sensor 3.3 – 4.0 V Ignition switch ON
Barometric pressure : 100 kPa (760 mmHg)
27 Diag. Switch terminal (Vehicle without
immobilizer indicator lamp)4 – 6 V Ignition switch ON
28 Monitor output (Vehicle without immo-
bilizer indicator lamp)––
29 Blank––
30 Blank––
31 Fuel injector NO.3 10 – 14 V Ignition switch ON

6-38 ENGINE GENERAL INFORMATION AND DIAGNOSIS
TERMINAL
NO.CIRCUIT NORMAL
VOLTAGECONDITION
C411 A/C compressor clutch 0 V Ignition switch ON
2 EGR valve (stepper motor coil 1)
(if equipped)10 – 14 V Ignition switch ON
3 Throttle position sensor 0.2 – 1.0 V Ignition switch ON
Throttle valve at idle position
2.8 – 4.8 V Ignition switch ON
Throttle valve at full open position
4 Heater of HO2S-2
(Vehicle with immobilizer indicator lamp)10 – 14 V Ignition switch ON
5 Power source 10 – 14 V Ignition switch ON
6 Power source 10 – 14 V Ignition switch ON
7 Engine start switch
(Engine start signal)6 – 12 V While engine cranking
0 V Other than above
8 EGR valve (stepper motor coil 3)
(if equipped)10 – 14 V Ignition switch ON
9 EGR valve (stepper motor coil 2)
(if equipped)10 – 14 V Ignition switch ON
10 Main relay 10 – 14 V Ignition switch OFF
0.4 – 1.5 V Ignition switch ON
11 Blank––
12 Blank––
13 Heated oxygen sensor-2
(Vehicle with immobilizer indicator lamp)Refer to DTC P0130 diag. flow table
14 D-range ID-up signal (A/T) 10 – 14 V Ignition switch ON
15 R-range signal (A/T) 0 V Ignition switch ON
16 A/C (input) signal 10 – 14 V Ignition switch ON
A/C switch OFF
0 – 2 V Ignition switch ON
A/C switch ON
17 EGR valve (stepper motor coil 4)
(if equipped)10 – 14 V Ignition switch ON
18 Radiator fan control relay 10 – 14 V Ignition switch ON
Engine coolant temp. : 9.5°C or
lower (203°F)
0 – 1 V Ignition switch ON
Engine coolant temp. : 97.5°C
(208°F) or higher
19 Fuel pump relay 0 – 1 V For 2 seconds after ignition switch
ON
10 – 14 V After the above time
20–––

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-39
C4121 Throttle opening signal for TCM
(A/T)Indication
deflection
repeated
0 V and
10 – 14 VIgnition switch ON
22 Fuel level sensor (gauge)
(Vehicle with immobilizer indicator lamp)0 – 2 V Ignition switch ON
Fuel tank fully filled
4.5 – 7.5 V Ignition switch ON
Fuel tank emptied
23 Serial data for TCM 10 – 14 V
and 0 – 1 VIgnition switch ON
24 Blank–– TERMINAL
NO.CIRCUIT NORMAL
VOLTAGECONDITION
TERMINAL
NO.CIRCUIT NORMAL
VOLTAGECONDITION
G021 Malfunction indicator lamp 0 – 1 V Ignition switch ON
10 – 14 V When engine running
2 Vehicle speed sensor Indicator
deflection
repeated
0 V and
4 – 6 VIgnition switch ON
Front left tire turned slowly with front
right tire locked
3 Radiator fan control relay 10 – 14 V Ignition switch ON and Engine coolant
temp. : 100°C (212°F) or lower
0 – 1 V Ignition switch ON and Engine coolant
temp. : 102.5°C (216.5°F) or higher
4 Blank––
5 Data link connector
(K line of ISO9141)10 – 14 V Ignition switch ON
6 Ignition switch 10 – 14 V Ignition switch ON
7 Data link connector (SUZUKI serial
data line)4 – 6 V Ignition switch ON
8 Blank––
9 Stop lamp switch 0 V Ignition switch ON
Stop lamp switch OFF
10 – 14 V Ignition switch ON
Stop lamp switch ON
10 Sensor ground––
11 Blank––
12 Immobilizer indicator lamp 0 – 1 V Ignition switch ON
10 – 14 V When engine running
13 Electric load signal (–)0 – 2 V Ignition switch ON
Blower fan turned OFF
10 – 14 V Ignition switch ON
Blower fan turned ON
14 A/C evaporator temp. sensor––
15 Blank––
16 Tachometer (if equipped) 0 – 1 V Ignition switch ON