2006 SUZUKI SX4 Switch

Downloaded from www.Manualslib.com manuals search engine 10C-10 Immobilizer Control System:
Immobilizer Indicator Light Remains ON after Engine StartS6RW0DA304007
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Circuit Description
Refer to “Immobilizer Indicator Light Does Not Come ON with Ignition Switch ON and Engine Stop”.
Troubleshooting
DTC P1614: Transponder Response ErrorS6RW0DA304008
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
TroubleshootingStep Action Yes No
1DTC check of ECM
1) Check ECM for DTC referring to “DTC Check in Section
1A”.
Is DTC detected?Go to applicable DTC
diag. flow.Go to Step 2.
2CAN communication circuit check
1) Disconnect connectors from ECM, BCM, ABS control
module and combination meter.
2) Check CAN communication circuit for open, short and
high resistance.
• Between ECM and ABS control module
• Between BCM and ABS control module
• Between BCM and combination meter
Is each CAN communication circuit in good condition?Substitute a known-
good combination meter
and recheck. If
immobilizer indicator
light still remains ON,
substitute a known-
good ECM and recheck.Repair circuit.
Detecting Condition Trouble Area
Transponder code in transponder built in ignition key
cannot be read through ICM.• Use of ignition key without transponder
• Use of unregistered ignition key
• Corruption of transponder in ignition key
•ICM
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2DTC check of ECM
1) Check if any DTC other than P1614 is detected referring
to “DTC Check”.
Is DTC other than P1614 detected?Go to applicable DTC
diag. flow.Go to Step 3.
3Registration of ignition key in use with ECM
1) Register ignition key in use with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed?Recheck DTC. Go to Step 4.
4Registration of the spare ignition key
1) Register the spare ignition key with ECM referring to
“Registration of the Ignition Key”.
Was registration of spare ignition key completed?Replace ignition key
which can not be
registered.Substitute a known-
good ECM and recheck.

Downloaded from www.Manualslib.com manuals search engine 10C-12 Immobilizer Control System:
DTC P1616: Unregistered Keyless Start Control ModuleS6RW0DA304010
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Circuit Description
P1616 is detected when ECM detects different ID codes registered in ECM and keyless start control module after
turning engine start knob to ON position. Normally, when keyless start control module is replaced with new one, ECM
automatically registers the applicable code in keyless start control module after turning ignition switch to ON position.
However, when keyless start control module is replaced with used one, ECM does not automatically register the
applicable code in keyless start control module even if ignition switch is turned to ON position.
Detecting Condition and Trouble Area
Troubleshooting6Steering lock unit power supply check
1) Connect keyless start control module connector.
2) With ignition switch at ON position, check power supply
terminal voltage of steering lock unit connector. Refer to
“Keyless Start Control Module Power and Ground Circuit
Check in Section 10E”.
Is voltage 4 – 6 V?Replace steering lock
unit and recheck.Substitute a known-
good keyless start
control module and
recheck. If DTC P1615
is still detected,
substitute a known-
good ECM and recheck. Step Action Yes No
Detecting Condition Trouble Area
ECM detects different ID codes registered in ECM and
keyless start control module.• Keyless start system wire circuit
• Keyless start control module
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2Registration of the ignition key
1) Register the ignition key with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed?Recheck ECM for DTC. Go to Step 3.
3DTC check of ECM
1) Check DTC referring to “DTC Check”.
Is DTC P1618 and/or P1615 detected other than P1616?Go to DTC P1618
troubleshooting.Go to DTC P1615
troubleshooting.

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-13
DTC P1618: Keyless Start Control Module CAN Communication ErrorS6RW0DA304011
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC P1621: Immobilizer Communication Line ErrorS6RW0DA304012
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
TroubleshootingDetecting Condition Trouble Area
Communication error between ICM and ECM. • Related fuse(s) blown
• Poor connection at ICM connector
• Poor connection at ECM connector
• Power supply circuit
• Ground circuit
• Communication circuits between ICM and ECM
•ICM
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2Fuse check
1) Check fuse for ICM circuit.
Is fuse in good condition?Replace blown fuse(s)
and then, check for
short circuit.Go to Step 3.
3Voltage check at power and ground terminal
1) Check power and ground terminal voltage of ICM
connector referring to “Inspection of ICM and Its Circuit”.
Is each terminal voltage in good condition?Go to Step 4. Repair circuit.
4ICM and ECM connector check
1) With the ignition switch at OFF position, check
intermittent and poor connection of ICM connector and
ECM connectors referring to “Intermittent and Poor
Connection Inspection in Section 00”.
Is each connector in good condition?Go to Step 5. Repair poor connection.
5Communication circuit check between ICM and ECM
1) Check for open, short and high resistance in serial
communication and clock circuit between ICM and ECM.
Is each communication circuit in good condition?Substitute a known-
good ICM and recheck.
If DTC P1621 is still
detected, substitute a
known good ECM and
recheck.Repair circuit.

Downloaded from www.Manualslib.com manuals search engine 10C-14 Immobilizer Control System:
DTC P1622: EEPROM Reading / Writing ErrorS6RW0DA304013
Detecting Condition and Trouble Area
Troubleshooting
1) Clear DTC(s) referring to “DTC Clearance”.
2) Turn the ignition switch to OFF position.
3) Check if DTC P1622 is still detected referring to “DTC Check”. If still detected, go to the next step. If not, the
troubleshooting is completed.
4) Replace ECM with new one referring to “Engine Control Module (ECM) Removal and Installation in Section 1C”.
5) Perform “Procedure after ECM Replacement”.
DTC P1623: Unregistered TransponderS6RW0DA304014
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
TroubleshootingDetecting Condition Trouble Area
EEPROM in ECM is corrupted. Internal failure (EEPROM corruption) of ECM
Detecting Condition Trouble Area
Transponder code in the transponder built in the ignition
key is invalid.• Use of the unregistered ignition key
•ICM
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2DTC check of ECM
1) Check if any DTC other than P1623 is detected referring
to “DTC Check”.
Is DTC other than P1623 detected?Go to applicable DTC
diag. flow.Go to Step 3.
3Registration of unregistered ignition key with ECM
1) Register the unregistered ignition key with ECM referring
to “Registration of the Ignition Key”.
Was registration of ignition key completed?Recheck DTC. Go to Step 4.
4Registration of the spare ignition key
1) Register the spare ignition key referring to “Registration
of the Ignition Key”.
Was registration of spare ignition key completed?Replace ignition key
which cannot be
registered.Substitute a known-
good ECM and recheck.

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-15
DTC P1625: Immobilizer Antenna ErrorS6RW0DA304015
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
Troubleshooting
DTC P1636: Immobilizer Information Registration FailureS6RW0DA304016
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
TroubleshootingDetecting Condition Trouble Area
ICM is faulty. • ICM
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2DTC confirmation
1) Clear DTC referring to “DTC Clearance”.
2) Turn the ignition switch to OFF position.
3) Check DTC referring to “DTC Check”.
Is DTC P1625 still detected?Substitute a known-
good ICM and recheck
DTC. If DTC P1625 is
still detected, substitute
a known-good ECM and
recheck.Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
Detecting Condition Trouble Area
The registration of the immobilizer control system
information in ECM is failed.• CAN communication circuit
• Keyless start control module (if equipped)
• Combination meter
• TCM (A/T model)
• 4WD control module (if equipped)
• ABS control module
•BCM
•ECM
Step Action Yes No
1Was “Immobilizer Control System Check” performed?Go to Step 2. Go to “Immobilizer
Control System Check”.
2DTC check of ECM
1) Check ECM for DTC referring to “DTC Check in Section
1A”.
Is DTC U0073, U0101, U0121 and/or U0140 detected?Go to applicable DTC
diag. flow.Go to Step 3.
3DTC check of BCM
1) Check BCM for DTC referring to “DTC Check in Section
10B”.
Is DTC U0073, U0100, U0101, U0155 and/or U1144
detected?Go to applicable DTC
diag. flow.Go to Step 4.

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-17
Inspection of ICM and Its CircuitS6RW0DA304018
ICM and its circuit can be checked at ICM wiring connector by measuring voltage.
CAUTION!
ICM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ICM with
connector disconnected from it.

Voltage Check
1) Remove ICM (1) from steering lock assembly or steering lock unit referring to “ICM Removal and Installation”.
2) Connect ICM connector (2) to ICM.
3) Check voltage at each terminal.
NOTE
As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when the
ignition switch is turned to ON position.

5DTC check of BCM
1) Check BCM for DTC referring to “DTC Check in Section
10B”.
Is DTC U0073, U0100, U0101, U0155 and/or U1144
detected?Go to applicable DTC
diag. flow.Go to Step 6.
6CAN communication circuit check
1) Disconnect connectors from ECM, BCM and ABS
control module.
2) Check CAN communication circuit for open, short and
high resistance.
• Between ECM and ABS control module
• Between BCM and ABS control module
Is each CAN communication circuit in good condition?Go to Step 7. Repair circuit.
7Replacement of BCM
1) Replace BCM with new one referring to “BCM (Included
in Junction Block) Removal and Installation in Section
10B”.
2) Check ECM for DTC referring to “DTC Check”.
Is DTC P1638 still detected?Substitute a known-
good ECM and recheck.BCM faulty. Step Action Yes No
1 2 3
4
1
25
6 [A]
I6RW0BA30003-01
[A]: ICM connector (harness side view)

Downloaded from www.Manualslib.com manuals search engine 10C-18 Immobilizer Control System:
Reference Waveform
NOTE
When ECM cannot read the transponder code at the first try, ECM tries to read the transponder code
repeatedly up to 8 times. The second waveform is the example showing that ECM read the transponder
code successfully at the second try.

Terminal Circuit Normal Voltage Condition
G17-1 Power supplyAbout 12.0 V Ignition switch at ON position
0.0 V Ignition switch at OFF position
G17-2 Ground 0.0 V —
G17-3 Serial communication lineSee the reference
waveform.—
0.0 V Ignition switch at OFF position
G17-4 Clock lineSee the reference
waveform.—
0.0 V Ignition switch at OFF position
G17-5 Illumination ring control (if equipped)0 V• Ignition key not inserted to the key cylinder
• Door opened
0 V → 12 V• Ignition key at OFF position
• From the time door is closed to the time
interior light faded out completely
(As the interior light fades out, the voltage
increases.)
0 V → 12 V• Door closed
• From the ignition switch is turned ON to the
time interior light is completely faded out
(As the interior light fades out, the voltage
increases.)
G17-6Illumination ring power supply
(if equipped)About 12.0 V —
I6RW0CA30003-01
[A]: The transponder code read successfully at the first try. 2. Clock line
[B]: The transponder code read successfully at the second try. 3. First try
1. Serial communication line 4. Second try
Measurement terminals CH1: G17-3 to G17-2
CH2: G17-4 to G17-2
Oscilloscope settings CH1: 5 V/DIV
CH2: 5 V/DIV
TIME: 20 ms
Measurement condition Right after the ignition switch is turned ON, the waveform can be read.

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-1
Control Systems
Keyless Start System
General Description
Keyless Start System DescriptionS6RW0DA501001
Keyless start system consisting of the parts shown below has three functions as described below.
• Keyless engine start function:
With the remote controller which has been registered in the keyless start control module carried with oneself, the
engine can be started without using the ignition key.
• Door lock function:
Pushing the request switch incorporated in the outside handle of the driver side door, passenger side door or rear
end door while carrying the remote controller which has been registered in the keyless start control module, doors
can be locked or unlocked.
• Keyless entry system function:
It is possible to lock or unlock doors by pushing the lock or unlock button of remote controller.
The keyless start control module can accept registration of up to four remote controllers.
3
2
11
104
8
5
3
6
7
1
14
13
9
12 [A]
12[B]
I6RW0DA50001-01
[A]: Junction block with BCM type 5. Luggage room antenna 11. Unlock button
[B]: Junction block without BCM type 6. Driver side door antenna 12. BCM
1. Keyless start control module 7. Passenger side door antenna 13. Key indicator light
2. Remote controller 8. Rear end door antenna 14. ECM
3. Request switch 9. Steering lock unit
4. Center antenna 10. Lock button