2006 SUZUKI SX4 wiring

Downloaded from www.Manualslib.com manuals search engine Lighting Systems: 9B-12
Back-Up Light Symptom DiagnosisS6RW0D9204020
Brake Light Symptom DiagnosisS6RW0D9204007
Front Fog Light Symptom Diagnosis (If Equipped)S6RW0D9204008
Rear Fog Light Symptom Diagnosis (If Equipped)S6RW0D9204009
Condition Possible cause Correction / Reference Item
Back-up lights do not
light upBulb(s) blownReplace bulb(s).
Circuit fuse blownReplace fuse and check for short circuit.
Back-up light switch (M/T model) or
transmission range sensor (A/T model)
faultyCheck back-up light switch or transmission
range sensor referring to “Back Up Light
Switch Inspection in Section 5B” or
“Transmission Range Sensor Inspection and
Adjustment in Section 5A”.
Wiring or grounding faultyRepair circuit.
Back-up lights stay onBack-up light switch (M/T model) or
transmission range sensor (A/T model)
faultyCheck back-up light switch or transmission
range sensor referring to “Back Up Light
Switch Inspection in Section 5B” or
“Transmission Range Sensor Inspection and
Adjustment in Section 5A”.
Condition Possible cause Correction / Reference Item
Brake light do not light upBulb(s) blownReplace bulb(s).
Circuit fuse blownReplace fuse and check for short circuit.
Brake light switch faultyCheck brake light switch referring to “Brake
Light Switch Inspection”.
Wiring or grounding faultyRepair circuit.
Brake light stay onBrake light switch faultyCheck or adjust brake light switch referring to
“Brake Light Switch Inspection” or “Brake Light
Switch Adjustment in Section 4A”.
Condition Possible cause Correction / Reference Item
Only one light does not
lightBulb blownReplace bulb.
Wiring or grounding faultyRepair circuit.
Front fog lights do not
lightCircuit fuse blownReplace fuse and check for short circuit.
Bulb blownReplace bulb.
Front fog light switch faultyCheck front fog light switch referring to “Front
Fog Light Switch Inspection (If Equipped)”.
Front fog light relay faultyCheck front fog light relay referring to “Tail
Light Relay, Headlight Relay, Front Fog Light
Relay Inspection (If Equipped)”.
Wiring or grounding faultyRepair circuit.
Condition Possible cause Correction / Reference Item
Rear fog light do not lightCircuit fuse blownReplace fuse and check for short circuit.
Bulb blownReplace bulb.
Rear fog light switch faultyCheck rear fog light switch referring to “Rear
Fog Light Switch Inspection (If Equipped)”.
Wiring or grounding faultyRepair circuit.

Downloaded from www.Manualslib.com manuals search engine 9B-13 Lighting Systems:
Illumination Cancel System Symptom Diagnosis (If Equipped)S6RW0D9204010
Interior Light Symptom DiagnosisS6RW0D9204011
NOTE
• Use of SUZUKI scan tool makes it easy to check whether a faulty condition is on the input side or
output side of BCM. For checking procedure, refer to “Diagnosis Using Output Test Function of
SUZUKI Scan Tool” under “Scan Tool Data in Section 10B”.
• Check each part in the order from the top of the following list.

DRL Operation Inspection (If Equipped)S6RW0D9204012
1) Confirm that lighting switch is in OFF position.
2) Confirm that dimmer and passing switch is in low beam position.
3) Check DRL for operation as follows.
a) Turn ignition switch to ON position and check headlights remain OFF.
b) Start engine and run it at idle speed. Check headlights turn ON at low beam.
c) Switch dimmer and passing switch to high beam position and check headlights remain turning ON at low
beam.
4) If check result is not as satisfied, go to “Inspection of DRL Controller and Its Circuits (If Equipped)”.
Inspection of DRL Controller and Its Circuits (If Equipped)S6RW0D9204013
1) Confirm that lighting switch is in good condition referring to “Headlight Switch (in Lighting Switch) Inspection”.
2) Confirm that oil pressure switch is in good condition referring to “Oil Pressure Switch Inspection in Section 9C”.
3) Remove glove box.
4) Remove DRL controller (1) from steering support member.
5) Connect connector to DRL controller.Condition Possible cause Correction / Reference Item
Illumination cancel do not
normal operationCircuit fuse blownReplace fuse and check for short circuit.
Illumination cancel switch faultyCheck illumination cancel switch referring to
“Illumination Cancel Switch Inspection (If
Equipped)”.
Combination meter and/or information
display faultyReplace combination meter and/or information
display.
Wiring or grounding faultyRepair circuit.
Condition Possible cause Correction / Reference Item
Dome light does not light
upBulb blownReplace bulb.
Circuit fuse blownReplace fuse and check for short circuit.
Dome light switch faultyCheck dome light switch.
Door switch faultyCheck door switch referring to “Door Switch
(Front / Rear Door) Inspection in Section 9C”.
Wiring or grounding faultyRepair circuit.
BCM faultyReplace after making sure that none of above
parts is faulty.
Luggage compartment
light does not light up (if
equipped)Bulb blownReplace bulb.
Rear end door switch faultyCheck switch referring to “Rear End Door
Switch Inspection in Section 9C”.
Wiring or grounding faultyRepair circuit.

Downloaded from www.Manualslib.com manuals search engine Lighting Systems: 9B-16
Inspection of Headlight Leveling Control Module and Its Circuit (Headlight Auto Leveling System)S6RW0D9204023
Headlight auto leveling control module and its circuits can be checked at headlight auto leveling control module wiring
couplers by measuring voltage and pulse signal.
CAUTION!
Headlight auto leveling control module cannot be checked by itself. It is strictly prohibited to connect
voltmeter or ohmmeter to headlight auto leveling control module with couplers disconnected from it.

Voltage Check
Check voltage between each terminal of headlight auto leveling control module and vehicle body ground under each
condition. If measured voltage is out of standard value, check circuit (including switch and sensor) of terminal where
voltage was measured.
NOTE
• As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when
ignition switch is ON.
• Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with
oscilloscope if necessary.

4Auto-on headlight sensor
signal3 – 4.5 VLight the sensor lens with
incandescent lamp 100 W
Less than 1 VCover the sensor lens with
hand.
5Ground for auto-on headlight
controller0 V —
6Ground for auto-on headlight
sensor0 V —
7 Lighting switch signal0 VIgnition switch is at ON
position, lighting switch at
“AUTO” position.
1.0 – 5.0 VIgnition switch is at ON
position, lighting switch at other
than “AUTO” position.
8 Ignition switch signal 10 – 14 VIgnition switch is at ON
position. Terminal Circuit Specification Condition
V
10 11 12 13 16 17 18 19 2031 5 6 9
21 22 23 24
[A]
I6RW0C920012-01
[A]: Headlight leveling control module connector (viewed from harness side)

Downloaded from www.Manualslib.com manuals search engine 9C-6 Instrumentation / Driver Info. / Horn:
Diagnostic Information and Procedures
Speedometer and VSS Symptom DiagnosisS6RW0D9304001
Tachometer Symptom DiagnosisS6RW0D9304002
Engine Coolant Temperature (ECT) Meter Symptom DiagnosisS6RW0D9304003
Fuel Meter Symptom DiagnosisS6RW0D9304004
Condition Possible cause Correction / Reference Item
Speedometer shows no
operation or incorrect
operationCircuit fuse blownReplace fuse and check for short circuit.
Front wheel speed sensor or sensor
encoder faulty (M/T model)Check front wheel speed sensor or sensor
encoder referring to “Front and Rear Wheel
Speed Sensor On-Vehicle Inspection in
Section 4E” or “Front Wheel Speed Sensor
Encoder On-Vehicle Inspection in Section 4E”.
Output shaft speed sensor (VSS) faulty
(A/T model)Check output shaft speed sensor (VSS)
referring to “Output Shaft Speed Sensor (VSS)
Inspection in Section 5A”
Wiring or grounding faultyRepair circuit.
Combination meter faulty Replace combination meter.
TCM faulty (A/T model)Check input and output signal of TCM referring
to “Inspection of TCM and Its Circuits in
Section 5A”
ECM faultyReplace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
Tachometer shows no
operation or incorrect
operationCircuit fuse blownReplace fuse and check for short circuit.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
ECM faultyReplace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
Engine coolant
temperature (ECT) meter
shows no operation or
incorrect operationCircuit fuse blownReplace fuse and check for short circuit.
ECT sensor faultyCheck ECT sensor referring to “Engine
Coolant Temperature (ECT) Sensor Inspection
in Section 1C”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
ECM faultyReplace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
Fuel meter shows no
operation or incorrect
operationCircuit fuse blownReplace fuse and check for short circuit.
Fuel level sensor faultyCheck fuel level sensor referring to “Fuel Level
Sensor Inspection”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
ECM faultyReplace after making sure that none of above
parts is faulty.

Downloaded from www.Manualslib.com manuals search engine Instrumentation / Driver Info. / Horn: 9C-7
Low Fuel Warning Light Symptom DiagnosisS6RW0D9304005
NOTE
• Confirm that fuel meter is in good condition before referring to the following possible causes.
• When fuel level sensor circuit is open or short, fuel level meter indicates empty even if fuel tank
does not empty.
• The low fuel warning light comes ON when fuel level is lower than specification below.

Low fuel warning light operation:
Oil Pressure Warning Light Symptom DiagnosisS6RW0D9304006
Low fuel warning light operation: Fuel amount: Resistance of fuel level sensor:
ON (2WD) Approx. 7.5 liter Approx. 261 Ω
ON (4WD) Approx. 6.8 liter Approx. 261 Ω
Condition Possible cause Correction / Reference Item
Low fuel warning light
does not come ON when
fuel level is lower than
specificationCircuit fuse blownReplace fuse and check for short circuit.
Fuel level sensor faultyCheck fuel level sensor referring to “Fuel Level
Sensor Inspection”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
ECM faultyReplace after making sure that none of above
parts is faulty.
Low fuel warning light
comes ON steadyLow fuelRefill fuel.
Fuel level sensor faultyCheck fuel level sensor referring to “Fuel Level
Sensor Inspection”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
ECM faultyReplace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
Oil pressure warning light
does not light up when
ignition switch is turned
to ON position at engine
offCircuit fuse blownReplace fuse and check for short circuit.
Oil pressure switch faultyCheck oil pressure switch referring to “Oil
Pressure Switch Inspection”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faultyReplace after making sure that none of above
parts is faulty.
Oil pressure warning light
stays ONOil pressure switch faultyCheck oil pressure switch referring to “Oil
Pressure Switch Inspection”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faultyReplace after making sure that none of above
parts is faulty.

Downloaded from www.Manualslib.com manuals search engine 9C-8 Instrumentation / Driver Info. / Horn:
Brake and Parking Brake Warning Light Symptom DiagnosisS6RW0D9304007
Seat Belt Reminder Light Symptom DiagnosisS6RW0D9304008
A/T Shift Position Indicator Symptom Diagnosis (A/T Model)S6RW0D9304009
Condition Possible cause Correction / Reference Item
Brake warning light does
not light up when brake
fluid level is low or
parking brake is pulled up
or for 5 seconds after
turning ON ignition switchCircuit fuse blownReplace fuse and check for short circuit.
Brake fluid level switch faultyCheck brake fluid level switch referring to
“Brake Fluid Level Switch Inspection”.
Parking brake switch faultyCheck parking brake switch referring to
“Parking Brake Switch Inspection”.
ABS system faultyRefer to “ABS Check in Section 4E”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faultyReplace after making sure that none of above
parts is faulty.
Brake warning light stays
ONBrake fluid level switch faultyCheck brake fluid level switch referring to
“Brake Fluid Level Switch Inspection”.
Parking brake switch faultyCheck parking brake switch referring to
“Parking Brake Switch Inspection”.
EBD system faultyRefer to “EBD Warning Light (Brake Warning
Light) Check in Section 4E”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faultyReplace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
Seat belt reminder light
does not light upCircuit fuse blownReplace fuse and check for short circuit.
Seat belt switch faultyCheck seat belt switch referring to “Front Seat
Belt Inspection in Section 8A”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faultyReplace after making sure that none of above
parts is faulty.
Seat belt reminder light
stays ONSeat belt switch faultyCheck seat belt switch referring to “Front Seat
Belt Inspection in Section 8A”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faultyReplace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
All A/T shift position
indicator does not light upCircuit fuse blownReplace fuse and check for short circuit.
Transmission range sensor (shift switch)
faultyCheck transmission range sensor referring to
“Transmission Range Sensor Inspection and
Adjustment in Section 5A”.
Wiring or ground faultyRepair circuit.
Combination meter faultyReplace combination meter.
TCM faultyReplace after making sure that none of above
parts is faulty.

Downloaded from www.Manualslib.com manuals search engine Instrumentation / Driver Info. / Horn: 9C-9
Charge Warning Light Symptom DiagnosisS6RW0D9304010
Main Beam (High Beam) Indicator Symptom DiagnosisS6RW0D9304011
Warning Buzzer Circuit Symptom DiagnosisS6RW0D9304012
NOTE
• Use of SUZUKI scan tool makes it easy to check whether a faulty condition is on the input side or
output side of BCM. For checking procedure, refer to “Diagnosis Using Output Test Function of
SUZUKI Scan Tool” under “Scan Tool Data in Section 10B”.
• Check each part in the order from the top of the following list.

Condition Possible cause Correction / Reference Item
Charge warning light
does not come ONCircuit fuse blownReplace fuse and check for short circuit.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faulty Replace after making sure that none of above
parts is faulty.
Charge warning light stay
ONCharging system faultyCheck charging system.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
BCM faulty Replace after making sure that none of above
parts is faulty.
Condition Possible cause Correction / Reference Item
Main beam (high beam)
indicator does not come
ONCircuit fuse blownReplace fuse and check for short circuit.
Combination switch faultyCheck combination switch referring to
“Headlight Switch (in Lighting Switch)
Inspection in Section 9B”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
Main beam (high beam)
indicator stay ONCombination switch faultyCheck combination switch referring to
“Headlight Switch (in Lighting Switch)
Inspection in Section 9B”.
Wiring or grounding faultyRepair circuit.
Combination meter faultyReplace combination meter.
Condition Possible cause Correction / Reference Item
Warning buzzer shows no
soundingCircuit fuse blownReplace fuse and check for short circuit.
Driver side door switch faultyCheck driver side door switch referring to
“Door Switch (Front / Rear Door) Inspection”.
Lighting switch faultyCheck lighting switch referring to “Headlight
Switch (in Lighting Switch) Inspection in
Section 9B”.
Key reminder switch faultyCheck key reminder switch referring to
“Ignition Switch Inspection”.
Seat belt switch faultyCheck seat belt switch referring to “Front Seat
Belt Inspection in Section 8A”.
Wiring or grounding faultyRepair circuit.
BCM faultyReplace after making sure that none of above
parts is faulty.

Downloaded from www.Manualslib.com manuals search engine 9C-10 Instrumentation / Driver Info. / Horn:
Cigarette Lighter Symptom Diagnosis (If Equipped)S6RW0D9304013
Horn Symptom DiagnosisS6RW0D9304014
Information Display Symptom Diagnosis (If Equipped)S6RW0D9304015
NOTE
This thermometer indicates the ambient temperature in the under side of front bumper member. Under
any one of the following listed conditions, however, even when the ambient temperature goes up, the
thermometer display does not rise so as to correct the rise of the ambient temperature caused by the
radiant heat of the engine. When the ambient temperature drops, the thermometer reading follows the
change in the temperature.
Be sure to bear this in mind when diagnosing trouble.
• The vehicle speed is 30 km/h (18 mph) or lower.
• Vehicle speed signal is faulty.
• The ignition switch is turned on again within 2 hours.

Condition Possible cause Correction / Reference Item
Cigarette lighter shows
no operationCircuit fuse blownReplace fuse and check for short circuit.
Cigarette lighter faultyCheck cigarette lighter.
Ignition switch faultyCheck ignition switch referring to “Ignition
Switch Inspection”.
Wiring or grounding faultyRepair circuit.
Condition Possible cause Correction / Reference Item
Horn does not operateCircuit fuse blownReplace fuse and check for short circuit.
Horn switch faultyCheck horn switch.
Horn relay faultyCheck horn relay referring to “Horn Relay
Inspection”.
Wiring or grounding faultyRepair circuit.
Horn faultyCheck horn referring to “Horn Inspection”.
Condition Possible cause Correction / Reference Item
No displaying of
information displayCircuit fuse BlownReplace fuse and check for short circuit.
Wiring or grounding faultyRepair circuit.
Information display unit faultyReplace unit.
Incorrect thermometer
displayOutside air temperature sensor faultyCheck outside air temperature sensor referring
to “Outside Air Temperature Sensor Inspection
(If Equipped)”.
Vehicle speed signal faultyCheck ECM for DTC referring to “DTC Check
in Section 1A”.
Wiring or grounding faultyRepair circuit.
Information display unit faultyReplace unit.
BCM faultyReplace after making sure that none of above
parts is faulty.
Display of thermometer
does not change at –30
°C
(–22
°F)Outside air temperature is –30 °C (–22
°F) or less—
Outside air temperature sensor faultyCheck outside air temperature sensor referring
to “Outside Air Temperature Sensor Inspection
(If Equipped)”.
Information display unit faultyReplace unit.
BCM faultyReplace after making sure that none of above
parts is faulty.