2005 SUZUKI SWIFT Ac control switch

Downloaded from www.Manualslib.com manuals search engine 10C-13 Immobilizer Control System:
DTC P1622: EEPROM Reading / Writing ErrorS7RS0BA304013
Detecting Condition and Trouble Area
DTC Confirmation Procedure1) Turn ignition switch to ON position.
2) Check DTC in ECM.
Troubleshooting 1) Clear DTC(s) referring to “Diagnostic Trouble Code (DTC) Clearance”.
2) Turn the ignition switch to OFF position.
3) Check if DTC P1622 is still detected re ferring to “Diagnostic Trouble Code (DTC) Check”. If still detected, go to the
next step. If not, the troubleshooting is completed.
4) Replace ECM with new one referring to “ECM Removal and Installation in Section 1C”.
5) Perform “Procedure after ECM Replacement”.
DTC P1623: Unregistered TransponderS7RS0BA304014
Detecting Condition and Trouble Area
DTC Confirmation Procedure 1) Turn ignition switch to ON position.
2) Check DTC in ECM.
Troubleshooting 4
ICM and ECM connector check
1) With the ignition switch at OFF position, check
intermittent and poor connec tion 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.
5 Communication 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.
Step Action Yes No
Detecting Condition
Trouble Area
EEPROM in ECM is corrupted. ECM
Detecting Condition Trouble Area
Transponder code in the transponder built in the ignition
key is invalid. • Use of unregistered ignition key
• Ignition key
•ICM
•ECM
Step
Action YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 DTC check of ECM
Is DTC other than P1623 detected? Go to applicable DTC
diag. flow.
Go to Step 3.

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-14
DTC P1625: Immobilizer Antenna ErrorS7RS0BA304015
Detecting Condition and Trouble Area
DTC Confirmation Procedure1) Turn ignition switch to ON position.
2) Check DTC in ECM.
Troubleshooting
DTC P1636: Immobilizer Information Registration FailureS7RS0BA304016
DTC Detecting Condition and Trouble Area
Troubleshooting 3
Registration of unregistered ignition key with ECM
1) Register unregistered igniti on key with ECM referring to
“Registration of the Ignition Key”.
Was registration of ignition key completed? Unregistered ignition
key.
Go to Step 4.
4 Registration 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.
Step Action Yes No
Detecting Condition
Trouble Area
ICM • ICM
•ECM
StepAction YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 DTC confirmation
1) Clear DTC(s) referring to “Diagnostic Trouble Code
(DTC) Clearance”.
2) Turn the ignition switch to OFF position.
3) Check ECM for DTC referring to “Diagnostic Trouble Code (DTC) Check”.
Is DTC P1625 still detected? Replace 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 wire circuits
•BCM
•ECM
Step
Action YesNo
1 Was “Immobilizer Control S ystem Check” performed? Go to Step 2.Go to “Immobilizer
Control System Check”.
2 DTC check of ECM
1) Check ECM for DTC referring to “DTC Check in Section
1A”.
Is DTC P1674, P1675, P1678 and/or P1685 detected? Go to applicable DTC
diag. flow.
Go to Step 3.

Downloaded from www.Manualslib.com manuals search engine Immobilizer Control System: 10C-16
Inspection of Immobilizer Control Module (ICM) and Its CircuitS7RS0BA304018
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 referrin g to “Immobilizer Control Module (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.

5 CAN 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 6. Repair circuit.
6 Replacement of BCM
1) Replace BCM with new one referring to “BCM (Included
in Junction Block Assembly) Removal and Installation in
Section 10B”.
2) Check ECM for DTC referring to “Diagnostic Trouble Code (DTC) Check”.
Is DTC P1638 still detected? Substitute a known-
good ECM and recheck.
BCM faulty.
Step Action Yes No
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G24
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I4RS0BA30005-02
3. ICM connector (harness side view)

Downloaded from www.Manualslib.com manuals search engine 10C-17 Immobilizer Control System:
Reference WaveformNOTE
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.

TerminalCircuit Normal Voltage Condition
G24-1 Power supply About 12.0 V
Ignition switch at ON position
0.0 V Ignition switch at OFF position
G24-2 Ground 0.0 V
Ignition switch at ON position
0.0 V Ignition switch at OFF position
G24-3 Serial communication line See the reference waveform.
—
0.0 V Ignition switch at OFF position
G24-4 Clock line See the reference waveform.
—
0.0 V Ignition switch at OFF position
[A]: The transponder code read successfully at the first try.
[B]: The transponder code read successfully at the second try.
1. Serial communication line
2. Clock line
3. First try
4. Second try
I4RS0AA30007-01
Measurement terminals CH1: G24-3 to G24-2 CH2: G24-4 to G24-2
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 DescriptionS7RS0BA501001
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 handl e 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 push ing the lock or unlock button of remote controller.
The keyless start control module can accept regi stration of up to four remote controllers.
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I4RS0BA50001-02
1. Keyless start control module 5. Luggage room antenna 9. Steering lock unit13. Key indicator lamp
2. Remote controller 6. Driver side door antenna10. Lock button14. ECM
3. Request switch 7. Passenger side door antenna11. Unlock button
4. Center antenna 8. Rear end door antenna12. BCM

Downloaded from www.Manualslib.com manuals search engine 10E-2 Keyless Start System:
Parts and FunctionsS7RS0BA501002
PartsFunction
Keyless start control module • Activates each antenna
• Verifies ID code of remote controller
• Requests steering lock unit to release steering lock
• Requests BCM to lock or unlock doors
• Controls key indicator la
mp in combination meter
• Transmits its ID code to ECM
Remote controller • Receives request signal from each antenna
• Transmits ID code and request signal to keyless start control module
• Request keyless start control module to lock or unlock doors (keyless entry
system function)
Request switch • Requests keyless start control module to activate each antenna
Center antenna • Transmits request signal to remote controller
Luggage room antenna • Transmits request signal to remote controller
Driver side door antenna • Transmits request signal to remote controller
Passenger side door antenna • Transmits request signal to remote controller
Rear end door antenna • Transmits request signal to remote controller
Steering lock unit • Releases steering lock
Unlock button • Transmits door unlock request signal (keyless entry system function)
Lock button • Transmits door lock request signal (keyless entry system function)
BCM • Controls each door lock actuator
• Controls warning buzzer
• Lights hazard warning lamp and interior (DOME) light (answer back)
Key indicator lamp • Indicates operation state of keyless start system (indicates check result of
remote controller ID code)
ECM • Checks keyless start control module ID code
• Transmits its ID code to keyless start control module
• Starts engine

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-3
Keyless Engine Start FunctionS7RS0BA501003
When the ignition knob switch (2) installed to the steering lock unit (1) is pushed, the keyless start control module (3)
activates the center antenna (4) to send out the request signa l in the vehicle compartment. When the remote controller
(5) receives the request signal from th e center antenna, it transmits the ID code to the keyless start control module.
The keyless start control module compares the ID code sent by the remote controller with the ID code registered in the
keyless start control module. When these ID codes match, the keyless start control module makes the key indicator
lamp (7) in the combination meter (6) light in blue and unlocks the steering lock unit to enable the ignition knob switch
to turn. When the ignition knob switch is turned to ON posit ion in this state, ID codes of ECM and keyless start control
module are compared through CA N communication (immobilizer function). Wh en they match, turning the ignition knob
switch to start position will start the engine.
NOTE
When ignition knob switch is at ACC or ON position (engine not running) and any door has been kept
open for a certain time, it may happen that engine fails to start. In such a case, turn ignition knob
switch to OFF position once and then try to start engine again.

When the ID code from the remote controller and the ID code registered in the keyless start control module do not
match or when the remote controller is outside the operation area of the remote controller and the ignition knob switch
is pushed, the steering lock unit cannot be unlocked and so the ignition knob switch cannot be turned. Then, the
keyless start control module makes the key indicator lamp in t he combination meter light in red to warn the driver that
it is not possible to turn the ignition knob switch. Also, when the ID code of ECM and that of the keyless start control
module do not match, the engine cannot be started even if the ignition knob switch is turned to the start position. Then
ECM makes the immobilizer light in the combination mete r flash to warn the driver that it is not possible to start the
engine.
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[A]: i) ~ vii)
54
I5RS0CA50001-01
[A]: Signal flow
8. ECM

Downloaded from www.Manualslib.com manuals search engine 10E-4 Keyless Start System:
Door Lock Function of Keyless Start SystemS7RS0BA501004
When the request switch (1) incorporated in the outside handle of the driver side door, front passenger side door or
rear end door is pushed, the keyless start control modul e (2) activates the center antenna (3) and luggage room
antenna (4) to send out the radio wave in the vehicle compartm ent to check if the remote controller (5) is in the vehicle
compartment or not. When the keyless start control module receives no signal from the remote controller (i.e., the
remote controller does not exist in the vehicle compartment) , it activates the antenna (6) of the door of which the
request switch has been pushed to send the request signal out of the compartment.
If the remote controller exists within the door lock operati on area, it receives the request signal sent from the above
said antenna, sends the ID code of the remote controller and the request signal to the keyless start control module and
at the same time, it makes the operatio n indicator lamp (7) of the remote controller light up. Lighting of the operation
indicator lamp indicates that the remote controller sent the ID code and the request signal.
The keyless start control module compares the ID code sent from the remote controller with the ID code registered in
the keyless start control module. If both ID codes match, the keyless start control module outputs the lock or unlock
request signal (depending on the door lock switch (8) stat e then) to BCM (9). When BCM receives such signal through
CAN communication from the keyless start control module, it activates the door lock actuator to lock or unlock doors.
When the keyless start control module receiv es a signal from the remote controller (i.e., the remote controller exists in
the vehicle compartment), the function of the keyless start system to prevent the remote controller from being closed in
the vehicle works and the keyless start control module sends a request signal to unlock doors to BCM. In this way,
doors are kept unlocked.
Also, when the driver or passenger has left the vehicl e with the remote controller left behind in the vehicle
compartment and locked doors by using the door lock knob or manual door lock switch, the function to prevent the
remote controller from being closed in the vehicle works to unlock doors.
Furthermore, when ID codes of the remote controller and keyless start control module do not match or the remote
controller exists outside of the operation area, doors are not locked or unlocked even if the request switch of the
outside handle is operated.
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[A]: i) ~ viii)
viii)
I4RS0BA50003-02
[A]: Signal flow