Keyless SUZUKI SX4 2006 1.G Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 10B-5 Body Electrical Control System:
1. BCM 23. Brake fluid level switch 45. Passenger side door lock actuator (if equipped)
2. Rear end door opener actuator (if equipped) 24. Parking brake switch 46. Rear door lock actuator (if equipped)
3. Rear end door opener relay (if equipped) 25. Door key cylinder switch (included in door lock
actuator) (if equipped)47. Hazard warning switch
4. Rear washer motor 26. Manual door lock switch (if equipped) 48. Turn signal and hazard warning relay
5. Rear wiper and washer switch 27. Rear end door opener switch (if equipped) 49. To turn signal light
6. Outside air temperature sensor (if equipped) 28. A/C switch (if equipped) 50. Interior light
7. Key reminder switch 29. Rear end door window defogger switch 51. Rear end door window defogger relay
8. Theft deterrent light 30. Rear wiper motor 52. Right side door mirror heater (if equipped)
9. Oil pressure switch 31. Rear wiper relay 53. Left side door mirror heater (if equipped)
10. SDM 32. TCM (A/T model) 54. Rear end door window defogger
11. P/S control module 33. ECM 55. Rear end door window defogger indicator light
12. Navigation (if equipped) 34. ABS control module 56. Horn relay
13. Audio unit (if equipped) 35. Keyless start control module (if equipped) 57. Horn switch
14. Headlight leveling control module (if equipped) 36. CAN junction connector 58. Horn
15. Generator 37. Combination meter 59. Lighting switch
16. Information display (if equipped) 38. 4WD control module (if equipped) 60. Ignition switch
17. HVAC control module (if equipped) 39. DLC 61. Battery
18. Keyless entry receiver (if equipped) 40. To ABS control module and P/S control module 62. Body ground
19. Driver side door switch 41. To SDM 63. Engine ground
20. Other than driver side door switch 42. To HVAC control module (if equipped)

Downloaded from www.Manualslib.com manuals search engine 10B-7 Body Electrical Control System:
Component Location
BCM and Related System Component LocationS6RW0DA203001
13
12 17 18
21 19
14
24 25
2526
2722 23
22
2476
20
11
5
151615
16 [A] [B]
2
9
10
3
8
4
1
I6RW0DA20002-01
[A]: Auto A/C 9. Rear end door opener switch (if equipped) 19. Lighting switch
[B]: Manual A/C 10. Rear end door opener actuator (incorporated in
door switch)20. Manual door lock switch (if equipped)
1. Generator 11. Keyless entry receiver or keyless start control
module (if equipped)21. Key reminder switch (included in ignition switch)
2. Brake fluid level switch 12. Parking brake switch 22. Junction block
3. ECM 13. Seat belt buckle switch 23. BCM
4. Oil pressure switch 14. Theft deterrent light 24. Horn relay
5. Outside air temperature sensor (if equipped) 15. Rear end door window defogger switch 25. Rear wiper relay
6. Door lock actuator (incorporated in key
cylinder switch)16. A/C switch (if equipped) 26. Rear end door window defogger relay
7. Door switch 17. Hazard warning switch 27. Turn signal and hazard warning relay
8. Interior light 18. Rear wiper switch

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-8
Diagnostic Information and Procedures
BCM Self-Diagnosis FunctionS6RW0DA204001
• BCM monitors conditions of the system components and its circuit with ignition switch turned to ON position. When
an abnormality in the system occurs, the area where that abnormality lies is stored in the memory of EEPROM in
BCM.
• DTC can be checked in either one of following ways.
– DTC can be checked by SUZUKI scan tool (2) connected to DLC (1).
– DTC can be read from flashing pattern of Theft deterrent light (3). Also, DTC is displayed on combination meter
(4) at the same time.
BCM Input / Output Table
3
4
2
1
I5RW0AA20007-01
Control Input Output
Power door lock system• Key cylinder switch
• Manual door lock switch• Each door lock actuator
Keyless entry system• Key reminder switch
• Keyless entry receiver
• Driver side door switch• Each door lock actuator
• Turn signal and hazard warning relay
• Interior light
Keyless start system
(Door lock function)• Keyless start control module • Each door lock actuator
• Turn signal and hazard warning relay
• Interior light
Rear wiper • Rear wiper INT switch
• Rear wiper LO switch• Rear wiper relay
Combination meter• Tail light switch
• Oil pressure switch
• Parking brake switch
• Driver side seat belt switch
• Brake fluid level switch
• Generator
• Each door switch• Combination meter
Interior light• Each door switch
• Key reminder switch• Interior light
Warning buzzer• Key reminder switch
• Tail light switch
• Driver side door switch
• Keyless start control module (if equipped)
• TCM (reverse signal) (if equipped)• Warning buzzer (located in BCM)

Downloaded from www.Manualslib.com manuals search engine 10B-9 Body Electrical Control System:
Body Electrical Control System CheckS6RW0DA204002
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 a questionnaire form as shown in the figure will facilitate collecting information to the
point required for proper analysis and diagnosis.Rear end door window
defogger• Rear end door window defogger switch
• Generator• Rear end door window defogger
relay
Rear end door opener• Manual door lock switch (unlock signal)
• Key cylinder switch (unlock signal)
• Keyless entry transmitter (unlock signal)
• Rear end door opener switch• Rear end door opener relay
Door lock canceller • SDM (air bag deployment signal) • Each door lock actuator
Theft deterrent light• Key reminder switch • Theft deterrent light (located in
information display or clock) Control Input Output
Step Action Yes No
1) Customer complaint analysis
1) Perform customer complaint analysis.
Was customer complaint analysis performed?Go to Step 2. Perform customer
complaint analysis.
2) Problem symptom confirmation
1) Perform problem symptom confirmation.
Does trouble recur?Go to Step 3. Go to Step 7.
3) DTC check
1) Check DTC.
Is it malfunction code?Go to Step 4. Go to Step 5.
4) Troubleshooting for DTC
1) Check and repair according to DTC diag. flow.
Are check and repair completed?Go to Step 7. Check and repair
malfunction part(s).
5) Body electrical control system symptom diagnosis
1) Perform check and repair referring to “Symptom
Diagnosis” of system having a trouble.
Is there faulty condition?Repair or replace
malfunction part(s).Go to Step 6.
6) Check for intermittent problem
1) Check for intermittent problem.
Is there faulty condition?Repair or replace
malfunction part(s).Go to Step 7.
7) Final confirmation test
1) Clear DTC referring to “DTC Clearance”.
2) Check DTC referring to “DTC Check”.
Is there any DTC?Go to Step 4. End.

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-10
Customer questionnaire (example)
Problem Symptom Confirmation
Check if what the customer claimed in “Customer Questionnaire” is accurately found in the vehicle. If that symptom is
found, check whether the symptom is identified as a failure. (This step should be shared with the customer if possible.)
DTC Check
Check DTC stored in BCM memory referring to “DTC Check”, record it and then clear it referring to “DTC Clearance”.
DTC indicates 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, clear DTC once and check
whether or not any fault exists.
Troubleshooting for DTC
Based on the DTC indicated in Step 3 and referring to applicable DTC flow, locate the cause of the trouble, namely in
a sensor, wire harness, connector, BCM or other part and repair or replace faulty parts.
Body Electrical Control System Symptom Diagnosis
Check the parts or system suspected as a possible cause referring to symptom diagnosis of each system.
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 Inspection in Section 00”.
Final Confirmation Test
Confirm that the problem symptom has gone and the body electrical control system is free from any abnormal
conditions. If what has been repaired is related to the malfunction DTC, check DTC again and confirm that no DTC is
indicated.
Customers name:
Model:
VIN:

Date of issue:
Date Reg:
Date of problem:
Mileage:

Problem Symptoms
Power door lock system does not operate
Keyless entry system does not operate

Rear end door window defogger does not operate
Rear wiper does not operate
Rear end door opener does not operate
Other
Frequency of Occurrence
Continuous / Intermittent ( times a day, a month)
/ Other

Environmental Condition

Weather:
Fine / Cloudy / Rain / Snow / Other

Temperature: (F )
Diagnostic Trouble Code
Normal code / Malfunction code ( )
Warning buzzer does not sound
Interior light does not light
Theft deterrent light does not flush
I5RS0DA20006-01

Downloaded from www.Manualslib.com manuals search engine 10B-13 Body Electrical Control System:
DTC TableS6RW0DA204004
DTC
(displayed on
SUZUKI scan
tool)DTC (indicated
by theft
deterrent light) DTC (displayed on
odometer in
combination meter) Detected item Detecting condition
NO DTC 0000 0000 — No DTC detected
) B1133 1133 b1133 Battery voltage too high Battery voltage too high
) B1141 1141 b1141Outside air temperature
(ambient temperature)
sensor circuit openSensor output voltage too high
) B1142 1142 b1142Outside air temperature
(ambient temperature)
sensor circuit short to
groundSensor output voltage too low
) B1150 1150 b1150Air bag communication
circuit malfunctionAir bag communication circuit
open or short to ground
) B1157 1157 b1157Air bag deployment signal
inputAir bag deployment signal
inputted
) B1170 1170 b1170 EEPROM access error Memory error
) U0073 0073 U0073Control module
communication bus offTransmitting and receiving
error of BCM for specified time
continuously
) U0100 0100 U0100Lost communication with
ECMReceiving error of BCM from
ECM for specified time
continuously
) U0101 0101 U0101Lost communication with
TCMReceiving error of BCM from
TCM for specified time
continuously
) U0155 0155 U0155Lost communication with
instrument panel cluster
(IPC) control moduleReceiving error of BCM from
combination meter for
specified time continuously
) U1144 1144 U1144Lost communication with
keyless start control moduleReceiving error of BCM from
keyless start control module
for specified time continuously

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-20
DTC B1157 (No. 1157) Air Bag Deployment Signal InputS6RW0DA204011
Wiring Diagram
Refer to “DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction”.
DTC Detecting Condition and Possible Cause
Flow Test Description
Step 1: Check DTC for SDM.
DTC Troubleshooting
DTC B1170 (No. 1170): EEPROM Access ErrorS6RW0DA204012
DTC Detecting Condition and Possible Cause
DTC Troubleshooting
NOTE
Before performing steps below, be sure to perform “Body Electrical Control System Check”.

1) Ignition switch OFF.
2) Replace BCM.
3) Repeat BCM Check Flow Table.
DTC U0073 (No. 0073): Control Module Communication Bus OffS6RW0DA204013
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U0100 (No. 0100): Lost Communication with ECMS6RW0DA204014
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U0101 (No. 0101): Lost Communication with TCMS6RW0DA204018
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control ModuleS6RW0DA204015
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U1144 (No. 1144): Lost Communication with Keyless Start Control ModuleS6RW0DA204016
Refer to “Troubleshooting for CAN-DTC in Section 1A”. DTC detecting condition Possible cause
Air bag deployment signal is fed from SDM to BCM. • Air bag component parts
• BCM malfunction
Step Action Yes No
1DTC check of SDM
1) Check DTC stored in SDM referring to “DTC Check in
Section 8B”.
Is DTC B1021 detected?Go to “DTC B1021:
Front Air Bag
Deployment Record in
Section 8B”.Substitute a known-
good BCM (included in
junction block) and
recheck.
DTC detecting condition Possible cause
Data write error or check sum error. BCM malfunction

Downloaded from www.Manualslib.com manuals search engine 10B-23 Body Electrical Control System:
BCM connector “G04”E04-13 — — —
E04-14 — — —
Terminal Circuit Normal voltage Condition
G04-1CAN communication line (low)
for DLC*1.6 – 2.5 V
Refer to “Reference waveform No. 3: ” G04-2CAN communication line (low)
for each control module*1.6 – 2.5 V
G04-3CAN communication line
(high) for DLC*2.5 – 3.6 V
G04-4CAN communication line
(high) for each control module*2.5 – 3.6 V
G04-5Serial communication line of
data link connector 7 – 12 V Ignition switch is at ON position
G04-6 — — —
G04-7 — — —
G04-8 Theft deterrent light10 – 14 V Theft deterrent light is not lit up
0 V Theft deterrent light is lit up
G04-9 — — —
G04-10 — — —
G04-11Serial communication line for
information display and HVAC
control module (if equipped)*0 – 1 V
↑↓
10 – 14 VRefer to “Reference waveform No. 5: ”
G04-12Ground for keyless entry
receiver (if equipped)0 V —
G04-13Power supply for keyless
entry receiver (if equipped)4 – 6 V Ignition switch is at all positions
G04-14Signal for keyless entry
receiver (if equipped)*0 – 1 V
↑↓
4 – 6 VRefer to “Reference waveform No. 6: ”
G04-15 Vehicle speed signal output*0 – 1 V
↑↓
4 – 6VRefer to “Reference waveform No. 7: ”
G04-16 Key reminder switch10 – 14 V Ignition key is inserted to ignition key cylinder
0 VIgnition key is pulled out from ignition key
cylinder
G04-17Rear end door window
defogger switch*3 – 14 V Refer to “Reference waveform No. 8: ”
0 VIgnition switch is at ON position and rear end
door window defogger switch is pushed
G04-18 A/C switch (if equipped)*3 – 14 V Refer to “Reference waveform No. 8: ”
0 VIgnition switch is at ON position, blower speed
selector is at any position other than OFF
position and A/C switch is at ON position
G04-19 — — —
G04-20 — — —
G04-21 Rear wiper INT switch*0 – 1 V
↑↓
10 – 14 VRefer to “Reference waveform No. 9: ”
0 VIgnition switch is at ON position and rear
wiper switch is at INT position
G04-22 Rear wiper low switch*0 – 1 V
↑↓
10 – 14 VRefer to “Reference waveform No. 9: ”
0 VIgnition switch is at ON position and rear
wiper switch is at LOW position Terminal Circuit Normal voltage Condition

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-24
Junction block connector “E324”
Junction block connector “E325”
Junction block connector “G271”
Junction block connector “G272”
Junction block connector “G273”
Junction block connector “L312”
Junction block connector “L313”Terminal Circuit Normal voltage Condition
E324-2 Backup power source 10 – 14 V Ignition switch is at all positions
Terminal Circuit Normal voltage Condition
E325-3 Horn10 – 14 V Horn switch is at ON position
0 V Horn switch is at OFF position
Terminal Circuit Normal voltage Condition
G271-3 Ground for BCM 0 V Ignition switch is at all positions
G271-7Rear end door window
defogger indicator light10 – 14 VEngine is running and rear end door window
defogger indicator light is lit up
0 VEngine is running and rear end door window
defogger indicator light is not lit up
Terminal Circuit Normal voltage Condition
G272-3 Horn switch10 – 14 V Horn switch is not pushed
0 V Horn switch is pushed
G272-7 Lighting switch10 – 14 VEngine is running (with DRL model) or lighting
switch is at any position other than OFF
position
0 V Lighting switch is at OFF position
G272-9 Ground for BCM 0 V Ignition switch is at all positions
G272-11 Hazard warning switch10 – 14 V Hazard warning switch is at OFF position
0 VHazard warning switch is at ON position or
lock or unlock button of keyless entry
transmitter (answer back control) is pushed
Terminal Circuit Normal voltage Condition
G273-2 Power source (IG)10 – 14 V Ignition switch is at ON position
0 VIgnition switch is at any position other than
ON position
G273-5 Power source (ACC)10 – 14 V Ignition switch is at ACC or ON position
0 VIgnition switch is at any position other than
ACC or ON position
Terminal Circuit Normal voltage Condition
L312-4Power supply for rear wiper
motor10 – 14 VIgnition switch is at ON position
L312-5 Interior light10 – 14 VInterior light switch is at DOOR position and
interior light is not lit up
0 VInterior light switch is at DOOR position and
interior light is lit up
Terminal Circuit Normal voltage Condition
L313-2 Air bag communication line*0 – 1 V
↑↓
4 – 6 VRefer to “Reference waveform No. 10: ”
L313-3Serial communication line of
data link connector for SDM7 – 12 V Ignition switch is at ON position

Downloaded from www.Manualslib.com manuals search engine 10B-27 Body Electrical Control System:
Reference waveform No. 5
Information display and HVAC control module serial
communication signal (1)
Reference waveform No. 6
Keyless entry receiver signal (1)Reference waveform No. 7
Vehicle speed pulse output signal (1)
Reference waveform No. 8
A/C or rear end door window defogger switch signal (1) Measurement terminal CH2: “G04-11” to “G271-3”
Oscilloscope setting CH2: 5 V / DIV
TIME: 2 ms / DIV
Measurement
conditionIgnition switch is at ON position
Measurement terminal CH2: “G04-14” to “G271-3”
Oscilloscope setting CH2: 2 V / DIV
TIME: 200 ms / DIV
Measurement
conditionLock or unlock button of
keyless entry transmitter is
pushed
I4RS0AA20021-02
I4RS0AA20022-02
Measurement terminal CH1: “G04-15” to “G271-3”
Oscilloscope setting CH1: 2 V / DIV
TIME: 100 ms / DIV
Measurement
conditionVehicle speed at 10 km/h (6
mph)
Measurement terminal Rear end door window
defogger switch
CH2: “G04-17” to “G271-3”
A/C switch
CH2: “G04-18” to “G271-3”
Oscilloscope setting CH2: 5 V/DIV
TIME: 10 ms/DIV
Measurement
conditionRear end door window
defogger switch:
• Ignition switch is at ON
position and rear end door
window defogger switch is
not pushed
A/C switch:
• Ignition switch is at ON
position, A/C switch or
blower speed selector is at
OFF position
I5RW0AA20014-01
I4RS0AA20023-02