2006 SUZUKI SX4 section 1a

Downloaded from www.Manualslib.com manuals search engine 10C-16 Immobilizer Control System:
DTC P1638: Immobilizer Information MismatchedS6RW0DA304017
Wiring Diagram
Refer to “Immobilizer Control System Wiring Circuit Diagram”.
Detecting Condition and Trouble Area
Troubleshooting4CAN 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 5. Repair circuit.
5Replacement 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 P1636 still detected?Substitute a known-
good ECM and recheck.BCM faulty. Step Action Yes No
Detecting Condition Trouble Area
• The immobilizer control system information in ECM and
the one in BCM does not match.
• The registration of the immobilizer control system
information in ECM is failed.• Use of the wrong ECM
• 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 confirmation
1) Disconnect negative (–) cable from battery for more than
5 seconds.
2) Connect negative (–) cable to battery.
3) Check if any DTC is detected referring to “DTC Check”.
Is DTC P1638 still detected?Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3ECM specification check
1) Check ECM part number to see if ECM is applicable to
the vehicle in service.
Is a correct ECM used for the vehicle in service?Go to Step 4. Replace ECM with the
correct one and recheck
if DTC P1638 is still
detected by ECM.
4DTC 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 5.

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 10E-6 Keyless Start System:
• The ignition knob switch cannot be turned using the keyless engine start function fails to turn:
– The remote controller which has been registered in the keyless start control module and another un-registered
one are both carried at the same time
– The remote controller is kept in some metallic container which disturbs radio wave transmission/reception
– The ignition knob switch has been pushed for 5 seconds or longer
– The remote controller is placed close to outside of the vehicle compartment (such as on the instrument panel
beside the front window shield glass, on the rear parcel shelf or in a corner of the luggage room)
Alarm FunctionS6RW0DA501006
Under conditions as described in the table below, the keyless start control module makes the key indicator light flash in
red and the buzzer sound to call the driver’s attention.
CAN Communication System DescriptionS6RW0DA501007
Refer to “CAN Communication System Description in Section 1A” for CAN communication system description.
Keyless start control module communicates control data with each control module as follows.
Keyless Start Control Module Transmission DataCondition Buzzer operation Key indicator light operation
Ignition knob switch has stopped between ACC and OFF
positions while driver side door is opened (ignition knob
switch un-returned alarm)Intermittent —
Ignition switch has stopped between ACC and OFF
positions while driver side door is closed (ignition knob
switch un-returned alarm)2 times Flashing in red
Remote controller is carried out of vehicle and doors are
closed while ignition switch is at ON position (remote
controller carried-out alarm)5 times Flashing in red
Remote controller is carried out of vehicle through a window
without opening door while ignition switch is at ON position
(engine is running) and vehicle has been driven at 10km/h
(6 MPH) or more speed without remote controller in vehicle
compartment (the first time 10 km/h (6 MPH) speed is
exceeded only) (Remote controller carried-out alarm)5 times Flashing in red
BCM ECMCombination
Meter
ID code of keyless start control modulee
ECM-keyless start control module codeke
Ignition knob switch signal
Door lock/unlock request signal
Buzzer request signal
Answer back request signal
Panic alarm request signal
Key indicator light control signal DATA Transmit
Keyless Start
Control Module
I7RW01A50002-01

Downloaded from www.Manualslib.com manuals search engine 10E-8 Keyless Start System:
Diagnostic Information and Procedures
Precautions in Diagnosing TroublesS6RW0DA504001
• The keyless start system executes data transmission/
reception by means of the radio wave. Therefore,
proper operation may not be obtained if use of the
door lock function and engine start function of the
keyless start system is attempted near the place
where strong radio wave is emitted (TV and radio
broadcasting stations, etc.).
• Diagnostic information stored in keyless start control
module memory can be checked only by key indicator
light.
• Be sure to use the trouble diagnosis procedure as
described in “Keyless Start System Check”. Failure to
follow it may result in incorrect diagnosis. (Some other
DTC may be stored by mistake in the memory of
keyless start control module during inspection.)
• Be sure to read“Precautions for Electrical Circuit
Service in Section 00” before inspection and observe
what is written there.
• Communication of ECM, TCM (A/T model), BCM,
ABS control module, 4WD control module (if
equipped), keyless start control module and
combination meter is established by CAN (Controller
Area Network). (For detail of CAN communication for
keyless start control module, refer to “CAN
Communication System Description”). Therefore,
handle CAN communication line with care referring to
“Precaution for CAN Communication System in
Section 00”.
• Replacement of the keyless start control module
When keyless start control module is replaced with
new one, make sure that register remote controller ID
code to keyless start control module correctly
according to “Registration Procedure for Remote
Controller ID Code”.• Keyless start control module substitution
When the keyless start control module used in
another vehicle was installed in the vehicle being
serviced, register the ID code of the remote controller
to the keyless start control module first and then the
following code.
– With immobilizer control system, register the
ignition key transponder code for the immobilizer
control system in ECM. For registration procedure
of that, refer to “Registration of the Ignition Key in
Section 10C”.
– Without immobilizer control system, register the
steering lock unit ID code in keyless start control
module. For registration procedure of that, refer to
“Keyless Start Registration”.
Self-Diagnosis FunctionS6RW0DA504002
The keyless start control module has self-diagnosis
function to monitor the system components and circuits
while the keyless start system is at work. When the
keyless start control module detects an abnormality in
the system, it saves the area where such abnormality
has occurred as a DTC in its memory. The DTC stored in
memory of the keyless start control module is indicated
by the key indicator light in the combination meter
flashing in a specific pattern. For DTC indication, refer to
“DTC Check” and for the clearing procedure, to “DTC
Clearance”.
Keyless Start System Diagnosis IntroductionS6RW0DA504003
To ensure that the trouble diagnosis is done accurately
and smoothly, observe “Precautions in Diagnosing
Troubles” and follow “Keyless Start System Check”.
4. Ignition knob switch 13. Rear end door request switch 22. Ignition Switch
5. Key reminder switch 14. Driver side door lock switch
6. Driver side door antenna 15. Passenger side door lock switch

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-9
Keyless Start System CheckS6RW0DA504004
Step Action Yes No
1 1) Record details of the problem. For your record, use of a
questionnaire form will facilitate collecting information for
proper analysis and diagnosis.
2) Check if the problem described in “Customer
Questionnaire (Example)” actually occurs in the vehicle.
(This step should be performed with the customer if
possible.)
Perform “Keyless Start System Operation Inspection”
procedure to check if the symptom which has occurred is
abnormal or not.
3) Check for DTC referring to “DTC Check”, and then
record DTC(s).
4) Clear DTC referring to “DTC Clearance” if any DTC
exists, and then recheck for DTC.
Is any DTC still detected?Go to Step 2. Go to Step 3.
2 1) Check and repair referring to applicable “DTC Table”.
Are check and repair complete?Go to Step 5. Check and repair
malfunction part(s), and
go to Step 5.
3 1) Inspect and repair basic parts referring to “Keyless Start
System Symptom Diagnosis”.
Is there faulty condition?Repair or replace
malfunction part(s), and
go to Step 5.Go to Step 4.
4 1) Check for intermittent problems referring to “Intermittent
and Poor Connection Inspection in Section 00”.
Is there any faulty condition?Repair or replace
malfunction part(s), and
go to Step 5.Go to Step 5.
5 1) Confirm if the problem is solved and the keyless start
system is free from any abnormal conditions. If what has
been repaired is related to the DTC, clear the DTC once
and then confirm that no DTC is indicated.
Is there any problem symptom, DTC or abnormal condition?Go to 2) of Step 1 and
perform trouble
diagnosis again.End.

Downloaded from www.Manualslib.com manuals search engine Keyless Start System: 10E-13
Keyless Start System Symptom DiagnosisS6RW0DA504010
Door Lock Function of Keyless Start System
NOTE
Before performing trouble diagnosis procedure for door lock function of keyless start system, check
that power door lock system operates properly referring to “Power Door Lock System Operation
Inspection (If Equipped) in Section 9F”. If power door lock system does not operate properly, go to
“Power Door Lock System Symptom Diagnosis (If Equipped) in Section 9F”.

Keyless Engine Start Function
NOTE
Before performing symptom diagnosis procedure for keyless engine start system, check that engine
starts by using ignition key. If it cannot be started by using ignition key, go to “Engine Symptom
Diagnosis in Section 1A”.

Condition Possible cause Correction / Reference Item
All doors can not be
locked / unlocked by all of
door request switchesCircuit fuse(s) blownReplace fuse(s) and check for short circuit.
Remote controller battery deadReplace battery.
Remote controller faultyCheck remote controller for operation referring
to “Remote Controller Inspection”.
Wiring or grounding faultyRepair circuit.
Antennas or keyless start control
module faultyCheck input and output signals of keyless start
control module referring to “Inspection of
Keyless Start Control Module and Its Circuits”.
BCM faultyCheck input and output signal of BCM referring
to “Inspection of BCM and Its Circuits in
Section 10B”.
All doors can not be
locked / unlocked by any
one of door request
switchRequest switch faultyCheck request switch for operation referring to
“Front Door (Driver and Passenger Side), Rear
End Door Request Switch Inspection”.
Wiring or grounding faultyRepair circuit.
Antennas or keyless start control
module faultyCheck input and output signals of keyless start
control module referring to “Inspection of
Keyless Start Control Module and Its Circuits”.
BCM faultyCheck input and output signal of BCM referring
to “Inspection of BCM and Its Circuits in
Section 10B”.
Condition Possible cause Correction / Reference Item
Engine can not be started
by turning Ignition knob
switchCircuit fuse(s) blownReplace fuse(s) and check for short circuit.
Remote controller battery deadReplace battery.
Remote controller faultyCheck remote controller for operation referring
to “Remote Controller Inspection”.
Steering lock unit faultyCheck steering lock unit for operation referring
to “Steering Lock Unit Inspection”.
Wiring or grounding faultyRepair circuit.
Antennas or keyless start control
module faultyCheck input and output signals of keyless start
control module referring to “Inspection of
Keyless Start Control Module and Its Circuits”.
ECM faultyCheck input and output signal of ECM referring
to “Inspection of ECM and Its Circuits in
Section 1A”.

Downloaded from www.Manualslib.com manuals search engine 10E-20 Keyless Start System:
No DTC Detection After Performing DTC CheckS6RW0DA504014
Wiring Diagram
Description
The keyless start control module detects DTC by using signals from the key reminder and driver side door request
switches. The keyless start control module makes the key indicator light in the combination meter flash on and off by
using CAN communication.
Troubleshooting
BLK/ORNG16-9
G16-15
G16-14
G16-16
G16-20G16-29G16-30
G16-10
G16-34
G16-11BLU/WHT
WHT/RED
WHT/RED
WHT/RED
PPL
RED/BLK
5V5V 5V5V
5V12V
12VWHTREDWHTREDG16-18G16-19G241-10G241-7
BLU/YEL
ORN
BLK/YELBRN/YELBRNG146-3
G146-1
G146-2G146-5
G146-4
G146-6
G146-7G146-8
WHT/RED
WHT/RED
G241-32
6 7
81
2
4 53
20 12 3 4 5 6 7 8 9 10 11 14 15 16
36 34 33 32 30 29 24 23 37 18 19
[A]
9
G16
I7RW01A50004-02
[A]: Keyless start control module connector (viewed from harness side) 4. Ignition knob switch 8. Key indicator light
1. Keyless start control module 5. Key reminder switch 9. CAN junction connector
2. Steering lock unit 6. Driver side door request switch
3. Steering lock solenoid 7. Combination meter
Step Action Yes No
1Combination meter power and ground circuit check
1) Turn ignition switch to ON position.
Do warning lights in combination meter other than key
indicator light light up?Go to Step 2. Check main fuse, circuit
fuse, combination meter
power and ground
circuit.
2Driver side door request switch and its circuit check
1) Check driver side door request switch and its circuit
referring to “DTC No. 51 / No. 52 / No. 53: Driver Side /
Passenger Side / Rear End Door Request Switch
Failure”.
Is it in good condition?Go to Step 3. Repair or replace
malfunction part.
3Key reminder switch and its circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connector from ignition switch.
3) Check key reminder switch for operation referring to
“Ignition Switch Inspection in Section 9C”.
4) If OK, check for open, short and high resistance in key
reminder switch circuit.
Is it in good condition?Go to Step 4. Repair or replace
malfunction part.

Downloaded from www.Manualslib.com manuals search engine 10E-26 Keyless Start System:
DTC No. 31: Lost Communication with BCMS6RW0DA504020
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC No. 33: Control Module Communication Bus OffS6RW0DA504021
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC No. 51 / No. 52 / No. 53: Driver Side / Passenger Side / Rear End Door Request Switch FailureS6RW0DA504022
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Clear DTC referring to “DTC Clearance”.
2) Push request switch of each door.
3) Check DTC referring to “DTC Check”.
DTC Troubleshooting
PPL
BLU/RED
YELG16-16
G16-36
G16-32
12V
1 2 3 4 5 6 7 8 9 10 11 14 15 16
36 34 33 32 30 29 24 23 37 18 19 20
1
2
3
4
[A]
G16
I7RW01A50009-02
[A]: Keyless start control module connector (viewed from harness side) 3. Passenger side door request switch
1. Keyless start control module 4. Rear end door request switch
2. Driver side door request switch
DTC detecting condition Trouble area
DTC No. 51:
Input signal from driver side door request switch remains
ON, unchanged for 10 minutes or longer.
DTC No. 52:
Input signal from passenger side door request switch
remains ON, unchanged for 10 minutes or longer.
DTC No. 53:
Input signal from rear end door request switch remains
ON, unchanged for 10 minutes or longer.• Driver side door request switch and its circuit
• Passenger side door request switch and its circuit
• Rear end door request switch and its circuit
• Keyless start control module
Step Action Yes No
1Was “Keyless Start System Check” performed?Go to Step 2. Go to “Keyless Start
System Check”.