2000 SUZUKI SWIFT engine

IMMOBILIZER CONTROL SYSTEM 8G-5
0.5TIME (sec.) Ignition switch ON
High Immobilizer
control system
is normal
Immobilizer
control system
is abnormalLow
0.5 0.5 0.5 0.5
High
Low

With the ignition switch turned ON (but the engine at stop) regard-
less of the condition of the engine and emission control system,
ECM indicates whether a trouble has occurred in the immobilizer
control system or not by causing the immobilizer indicator lamp to
flash or turn ON.
Immobilizer indicator lamp is ON:
No trouble exists in the immobilizer control system.
Immobilizer indicator lamp is flashing:
ECM or Immobilizer Control Module has detected some trouble in
the immobilizer control system.
NOTE:
As soon as the ignition switch is turned ON, ECM and Immobi-
lizer Control Module diagnose if a trouble has occurred in the
immobilizer control system. While the diagnosis is being
made, the Immobilizer indicator lamp stays ON and if the diag-
nosis result is “abnormal”, it immediately changes to flashing
but if the result is “normal”, it remains ON. Diagnosis takes
about 3 seconds at maximum.
When ECM and Immobilizer Control Module detects a trouble, it
stores DTC corresponding to the exact trouble area in ECM and Im-
mobilizer Control Module memory.
DTCs stored in memory of each controller (Immobilizer Control
Module and ECM) can be read by using the procedure described
in “DIAGNOSTIC TROUBLE CODE CHECK (IMMOBILIZER CON-
TROL MODULE)” and “DIAGNOSTIC TROUBLE CODE CHECK
(ECM)” in this section.

8G-6 IMMOBILIZER CONTROL SYSTEM
DIAGNOSIS
ECM and Immobilizer Control Module have on-board diagnostic
system (a system self-diagnosis function) as described previously.
Investigate where the trouble is by referring to “DIAGNOSTIC
FLOW TABLE” and “DIAGNOSTIC TROUBLE CODE TABLE” on
later pages.
PRECAUTIONS IN DIAGNOSING TROUBLES
[PRECAUTIONS IN IDENTIFYING DIAGNOSTIC TROUBLE
CODE]
ECM


Before identifying diagnostic trouble code indicated by malfunc-
tion indicator lamp, don’t disconnect couplers from ECM, battery
cable from battery, ECM ground wire harness from engine.
Such disconnection will clear trouble codes for engine and emis-
sion control system stored in memory of ECM.

If abnormality or malfunction lies in two or more areas, malfunc-
tion indicator lamp indicates applicable codes three times each.
And flashing of these codes is repeated as long as diagnosis ter-
minal is grounded and ignition switch is held at ON position.

When ECM detects a trouble in both engine and emission control
system and immobilizer control system, malfunction indicator
lamp indicates trouble codes of both systems alternately while the
ignition switch is turned ON and the diagnosis terminal is
grounded.

Take a note of diagnostic trouble code indicated first.


Before identifying diagnostic trouble code indicated through Su-
zuki scan tool, don’t disconnect couplers from ECM, battery cable
from battery, ECM ground wire harness from engine.
Such disconnection will clear trouble codes for engine and emis-
sion control system stored in memory of ECM.

When ECM detects a trouble in both engine and emission control
system and immobilizer control system, Suzuki scan tool indi-
cates trouble codes of both systems using Suzuki mode of ECM
applications.

Take a note of diagnostic trouble code indicated first.
Immobilizer Control Module

Take a note of diagnostic trouble code indicated first.

8G-8 IMMOBILIZER CONTROL SYSTEM
Fig. 1 for Step 1 Fig. 2 for Step 1 Fig. 3 for Step 2
1. Monitor coupler
2. Service wire
A: Diagnosis switch terminal
B: Ground terminal
Fig. 4 for Step 3
“CHECK ENGINE” light
0.5
ON
OFF
TIME (sec.)
DIAGNOSTIC FLOW TABLE

STEPACTIONYESNO
11) Make sure that diagnosis switch
terminal in monitor coupler is not
grounded by service wire. See Fig. 1.
2) Check malfunction indicator lamp
while ignition switch is ON (but without
starting engine). See Fig. 2.
Dose malfunction indicator lamp flash?Go to Step 3.
If malfunction indicator lamp
remains ON, go to Step 2.

If malfunction indicator lamp
remains OFF, go to
“MALFUNCTION INDICATOR
LAMP CHECK” in Section 6.
21) Using service wire, ground diagnosis
switch terminal in monitor coupler.
See Fig. 3.
Dose malfunction indicator lamp flash?Immobilizer control
system is in good
condition.Go to “MALFUNCTION
INDICATOR LAMP CHECK” in
Section 6.
3Dose malfunction indicator lamp flash as
Fig. 4?Go to Step 4.Go to “MALFUNCTION
INDICATOR LAMP CHECK” in
Section 6.
41) Check DTC stored in Immobilizer
Control Module referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (IMMOBILIZER CONTROL
MODULE)” in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Go to Step 5.
51) Check DTC stored in ECM referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (ECM)” in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Substitute a known-good ECM
and recheck.
NOTE:
After replacing with a known-
good ECM, register ECM /
Immobilizer Control Module
code in ECM by performing
procedure described in
“Procedure after ECM
Replacement” section.

IMMOBILIZER CONTROL SYSTEM 8G-9

STEPACTIONYESNO
11) Check immobilizer indicator lamp
while ignition switch is ON (but without
starting engine). See Fig. 1.
Dose immobilizer indicator lamp flash?Go to Step 3.
If immobilizer indicator lamp
remains ON, go to Step 2.

If immobilizer indicator lamp
remains OFF, go to
“IMMOBILIZER INDICATOR
LAMP CHECK” in this section.
21) Check DTC stored in ECM referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (ECM)” in this section.
Is there any DTC(s)?Go to “IMMOBILIZER
INDICATOR LAMP
CHECK” in this section.Immobilizer control system is in
good condition.
31) Check DTC stored in Immobilizer
Control Module referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (IMMOBILIZER CONTROL
MODULE)” in this section.
Is there any DTC(s)?Go to flow table for
DTC No.Go to Step 4.
41) Check DTC stored in ECM referring to
“DIAGNOSTIC TROUBLE CODE
CHECK (ECM)” in this section.
Is there any DTC(s) for immobilizer
control system?Go to flow table for
DTC No.Substitute a known-good ECM
and recheck.
NOTE:
After replacing with a known-
good ECM, register ECM /
Immobilizer Control Module
code in ECM by performing
procedure described in
“Procedure after ECM
Replacement” section.
FIg. 1 for Step 1

8G-12 IMMOBILIZER CONTROL SYSTEM
EXAMPLE:
COIL ANTENNA FAILURE (CODE NO.13)
EXAMPLE:
NORMAL
Voltmeter Indicator
Voltmeter IndicatorHigh
Low
High
LowCODE No. 13 CODE No. 13 CODE No. 13
DIAGNOSTIC TROUBLE CODE TABLE
Immobilizer Control Module
DIAGNOSTIC TROUBLE CODEDIAGNOSTIC AREADIAGNOSISNO.VOLTMETER INDICATIONDIAGNOSTIC AREADIAGNOSIS
–NormalThis code appears when none of the other
codes are identified.
11
Transponder code
31
Transponder code
12Immobilizer Control Module
Di t bl di t
13Coil antenna or ignition key with
built-in transponderDiagnose trouble according to
“DIAGNOSTIC FLOW TABLE”
corresponding to each code No
21ECM / Immobilizer Control
Module code
corres onding to each code No.
22Ignition switch circuit
23Serial data link wire
Engine Control module (ECM)
DTC
(indicated on
Suzuki
scan tool)DTC
(indicated
by MIL)Malfunction Indicator lamp
(MIL) flashing patternDIAGNOSTIC AREADIAGNOSIS
NO DTC12Normal
This code appears when it is
confirmed that none of other
trouble codes is set for
immobilizer control system or
engine and emission control
system.
P162381ECM / Immobilizer
P162084Control Module codeDiagnose trouble according to
“DIAGNOSTIC FLOW TABLE”
P162282ECMcorresponding to each code
No.
P162183Serial data link wire

8G-14 IMMOBILIZER CONTROL SYSTEM
1. Main fuse
2. Main relay
3. ECM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler)For G10 engine
For G13B engine
For G10 engine For G13B engine
A-2 IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP DOSE NOT LIGHT AT IGNITION SWITCH ON)
STEPACTIONYESNO
11) Turn ignition switch ON.
Do other indicator / warning lights in
combination meter come ON?Go to Step 2.“IG” fuse blown, main fuse blown,
ignition switch malfunction,
“(d)” circuit between “IG” fuse
and combination meter or poor
coupler connection at
combination meter.
21) Turn ignition switch OFF and
disconnect connectors from ECM.
2) Check for proper connection to ECM
at terminal C02-18 for G10 engine or
C01-28 for G13B engine.
3) If OK, then using service wire, ground
terminal C02-18 for G10 engine or
C01-28 for G13B engine in connector
disconnected.
Does immobilizer indicator lamp turn on
at ignition switch ON?Substitute a known-
good ECM and
recheck.Bulb burned out or “(P)” wire
circuit open.

1. Main fuse
2. Main relay
3. ECM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler)For G10 engine
For G13B engine
For G10 engine For G13B engine
IMMOBILIZER CONTROL SYSTEM 8G-15
A-3 IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP REMAINS ON AFTER ENGINE STARTS)
STEPACTIONYESNO
11) With ignition switch OFF, disconnect
couplers from ECM.
Does immobilizer indicator lamp turn ON
at ignition switch ON?“(p)” wire shorted to
ground circuit.Substitute a known-good ECM
and recheck.