Can line SUZUKI SX4 2006 1.G Service Owner's Manual

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-43
THROTTLE MOTOR RELAY (ON/OFF)
ON: Throttle actuator (motor) control activated by ECM.
OF: Throttle actuator (motor) control stopped by ECM.
VEHICLE SPEED (km/h, mph)
It is computed based on pulse signals from front wheel
speed sensor (RH, LH) (for M/T model) or output shaft
speed sensor (VSS) (for A/T model).INJ PULSE WIDTH (FUEL INJECTION PULSE WIDTH,
msec.)
This parameter indicates time of the injector drive (valve
opening) pulse which is output from ECM (but injector
drive time of NO.1 cylinder for multiport fuel injection).
Visual InspectionS6RW0D1104008
Visually check the following parts and systems.
Engine Basic InspectionS6RW0D1104009
This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has been found
in “Visual Inspection”.
Follow the flow carefully.Inspection item Reference section
• Engine oil – level, leakage “Engine Oil and Filter Change in Section 0B”
• Engine coolant – level, leakage “Coolant Level Check in Section 1F”
• Fuel – level, leakage“Fuel Lines and Connections Inspection in
Section 0B”
• Air cleaner element – dirt, clogging “Air Cleaner Filter Inspection in Section 0B”
• Battery – fluid level, corrosion of terminal“Battery Dismounting and Remounting in
Section 1J”
• Water pump belt – tension damage“Accessory Drive Belt Inspection in Section
0B”
• Throttle valve – operating sound“Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
• Vacuum hoses of air intake system – disconnection, looseness,
deterioration, bend“Vacuum Hose Inspection in Section 1B”
• Connectors of electric wire harness – disconnection, friction
• Fuses – burning
• Parts – installation, bolt – looseness
• Parts – deformation
• Other parts that can be checked visually
Also check the following items at engine start, if possible
• Malfunction indicator lamp – Operation “Malfunction Indicator Lamp (MIL) Check”
• Charge warning lamp – Operation “Generator Symptom Diagnosis in Section 1J”
• Engine oil pressure warning lamp – Operation “Oil Pressure Switch Inspection in Section 9C”
• Engine coolant temp. meter – Operation“Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C”
• Fuel level meter – Operation “Fuel Level Sensor Inspection in Section 9C”
• Tachometer – Operation
• Abnormal air being inhaled from air intake system
• Exhaust system – leakage of exhaust gas, noise
• Other parts that can be checked visually
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Check battery voltage
Is it 11 V or more?Go to Step 3. Charge or replace
battery.
3Is vehicle equipped with keyless start control system?Go to Step 4. Go to Step 5.

Downloaded from www.Manualslib.com manuals search engine 1A-48 Engine General Information and Diagnosis:
Excessive engine oil
consumption – Oil
entering combustion
chamberSticky piston ring“Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Worn piston and cylinder“Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Worn piston ring groove and ring“Cylinders, Pistons and Piston Rings
Inspection in Section 1D”
Improper location of piston ring gap“Pistons, Piston Rings, Connecting Rods and
Cylinders Disassembly and Assembly in
Section 1D”
Worn or damaged valve stem seal“Valves and Valve Guides Inspection in
Section 1D”
Worn valve stem“Valves and Valve Guides Inspection in
Section 1D”
Engine hesitates –
Momentary lack of
response as accelerator
is depressed. Can occur
at all vehicle speeds.
Usually most severe when
first trying to make
vehicle move, as from a
stop sign.Spark plug faulty or plug gap out of
adjustment“Spark Plug Inspection in Section 1H”
Leaky high-tension cord“High-Tension Cord Inspection in Section 1H”
Fuel pressure out of specification“Fuel Pressure Check”
Malfunctioning EGR valve“EGR Valve Inspection (If Equipped) in Section
1B”
Poor performance of ECT sensor or
MAF sensor, “Engine Coolant Temperature (ECT) Sensor
Inspection in Section 1C” or “Intake Air
Temperature (IAT) Sensor Inspection in
Section 1C”
Faulty electric throttle body assembly“Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
Faulty APP sensor assembly“Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C”
Faulty fuel injector“Fuel Injector Circuit Check”
Faulty ECM
Engine overheatingCondition “Engine overheating”
Low compression“Compression Check in Section 1D”
Camshaft position control (VVT) system
out of order (for engine with VVT
system)“Oil Control Valve Inspection (For Engine with
VVT) in Section 1D”
Surge – Engine power
variation under steady
throttle or cruise. Feels
like vehicle speeds up
and down with no change
in accelerator pedal.Leaky or loosely connected high-tension
cord“High-Tension Cord Removal and Installation
in Section 1H”
Faulty spark plug (excess carbon
deposits, improper gap, burned
electrodes, etc.)“Spark Plug Inspection in Section 1H”
Variable fuel pressure“Fuel Pressure Check”
Kinky or damaged fuel hose and lines
Faulty fuel pump (clogged fuel filter)
Malfunctioning EGR valve“EGR Valve Inspection (If Equipped) in Section
1B”
Poor performance of MAF sensor“Intake Air Temperature (IAT) Sensor
Inspection in Section 1C”
Faulty fuel injector“Fuel Injector Circuit Check”
Faulty ECM
Faulty electric throttle body assembly“Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C”
Faulty APP sensor assembly“Accelerator Pedal Position (APP) Sensor
Assembly Inspection in Section 1C” Condition Possible cause Correction / Reference Item

Downloaded from www.Manualslib.com manuals search engine 1A-52 Engine General Information and Diagnosis:
Malfunction Indicator Lamp Does Not Come ON with Ignition Switch ON and Engine Stop (but
Engine Can Be Started)
S6RW0D1104011
Wiring Diagram
Circuit Description
When the ignition switch is turned ON, ECM causes the main relay to turn ON (close the contact point). Then, ECM
being supplied with the main power, transmits indication ON signal of malfunction indicator lamp (MIL) to combination
meter in order to turn MIL ON. And then, combination meter turns MIL ON. When the engine starts to run and no
malfunction is detected in the system, ECM transmits MIL indication OFF signal to combination meter in order to turn
MIL OFF. And then, combination meter turns MIL OFF, but if a malfunction was or is detected, MIL remains ON even
when the engine is running.
BLK/WHT
BLK/RED
BLK/RED
BLK/RED
WHTBLK/YEL
BLK/YEL
RED/BLK
BLK/YEL
GRN
BRN/WHT
12V5V
2
3 8
6
57
REDWHTREDWHT
REDWHTREDWHT
E01-29
E01-3
E01-1
E01-60
E01-18
E01-16
BLK/ORN49
13
10 12 11G241-31
1414
G241-16
[A]
E01 C01
3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238 3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238G2411 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
[B]
1
C01-58
C01-15 C01-30
BLK/ORN
BLKBLKBLK
15
E01-31
REDWHTREDWHTC01-13 C01-12
1614
I6RW0D110018-02
[A]: ECM connector (viewed from harness side) 5. “IG COIL” fuse 11. Individual circuit fuse box No.1
[B]: Combination meter connector (viewed from harness side) 6. “METER” fuse 12. “IGN” fuse
1. Main fuse box 7. ECM 13. BCM
2. Ignition switch 8. Junction block assembly 14. CAN communication line
3. Main relay 9. ABS control module 15. To other control module (if equipped)
4. Malfunction indicator lamp in combination meter 10. “FI” fuse 16. TCM (for A/T model)

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-53
Troubleshooting
NOTE
• Before performed trouble shooting, be sure to read the “Precautions of ECM Circuit Inspection”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits”.

Step Action Yes No
1MIL power supply check
1) Turn ignition switch to ON position.
Do other warning lights come ON?Go to Step 2. Go to Step 3.
2DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC in ECM.
Is there DTC(s) U0073 and/or U0121?Go to applicable DTC
diag. flow.Go to Step 3.
3Combination meter power supply and ground circuit
check
1) Turn ignition switch OFF position.
2) Disconnect connector from combination meter.
3) Check for proper connection to power supply and
ground terminals of combination meter connector.
4) If connections are OK, check that combination meter
circuit is as follows.
• Circuit voltage between combination meter power
supply terminal and vehicle body ground is 10 –14 V.
• Wiring harness resistance of combination meter
ground terminal and vehicle body ground is less than
3 Ω.
Are they in good condition?Go to Step 4. Repair or replace.
4CAN communication line circuit check
1) Check CAN communication line circuit between control
modules for open, short, high resistance and
connections referring to Step 5 to 10 under
“Troubleshooting for Communication Error with Scan
Tool Using CAN”.
Is circuit in good condition?Substitute a known-
good combination meter
and recheck. If MIL still
remains OFF, substitute
a known-good ECM and
recheck.Repair or replace.

Downloaded from www.Manualslib.com manuals search engine 1A-54 Engine General Information and Diagnosis:
Malfunction Indicator Lamp Remains ON after Engine StartsS6RW0D1104012
Wiring Diagram
Refer to “Malfunction Indicator Lamp Does Not Come ON with Ignition Switch ON and Engine Stop (but Engine Can
Be Started)”.
Circuit Description
When the ignition switch is turned ON, ECM causes the main relay to turn ON (close the contact point). Then, ECM
being supplied with the main power, transmits indication ON signal of malfunction indicator lamp (MIL) to combination
meter in order to turn MIL ON. And then, combination meter turns MIL ON. When the engine starts to run and no
malfunction is detected in the system, ECM transmits MIL indication OFF signal to combination meter in order to turn
MIL OFF. And then, combination meter turns MIL OFF, but if a malfunction was or is detected, MIL remains ON even
when the engine is running.
Troubleshooting
NOTE
• Before performed trouble shooting, be sure to read the “Precautions of ECM Circuit Inspection”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits”.

Step Action Yes No
1DTC check
1) Start engine and recheck DTC of ECM and TCM (for A/T
model) while engine running.
Is there any DTC(s)?Go to Step 2 of “Engine
and Emission Control
System Check”, Step 2
of “A/T System Check in
Section 5A”.Go to Step 2.
2CAN communication line circuit check
1) Check CAN communication line circuit between control
modules for open, short, high resistance and
connections referring to Step 5 to 10 under
“Troubleshooting for Communication Error with Scan
Tool Using CAN”.
Is circuit in good condition?Substitute a known-
good combination meter
and recheck. If MIL still
remains ON, substitute
a known-good ECM and
recheck.Repair or replace CAN
communication circuit.

Downloaded from www.Manualslib.com manuals search engine 1A-168 Engine General Information and Diagnosis:
Troubleshooting
Step Action Yes No
1DTC Check
1) Turn ignition switch to OFF position.
2) Connect scan tool to DLC.
3) Check DTC in the following control modules.
•ECM
•TCM
•BCM
• Keyless start control module
• 4WD control module
Is there any DTC other than CAN-DTC?Go to applicable
troubleshooting of DTC
other than CAN-DTC.Go to Step 2.
2Control module connector check
1) Turn ignition switch to OFF position.
2) Be sure to disconnect scan tool from DLC.
3) Disconnect all the following control module connectors.
• Control modules communicated by CAN
–ECM
–TCM
– ABS control module
–BCM
– Combination meter
– Keyless start control module
– 4WD control module
4) Check for proper connection to terminal of each CAN
line of all control module (communicated by CAN)
connectors.
5) If OK, connect all connectors of control module
communicated by CAN securely.
6) Recheck DTC for all control modules communicated by
CAN.
Is there any CAN-DTC?Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-169
3CAN line check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control module
communicated by CAN.
3) Check all the following CAN lines for open, short to
power circuit, short to ground circuit, short to other CAN
line and high resistance.
• Between BCM connector and DLC
• Between BCM connector and ABS control module
connector
• Between ABS control module connector and ECM
connector
• Between ECM connector and TCM connector
• Between BCM connector and keyless start control
module connector
• Between combination meter connector and 4WD
control module connector
• Between BCM connector and combination meter
connector
Are all CAN lines in good condition?Go to Step 4. Repair CAN line.
4Power and ground circuits check of BCM, ECM, ABS
control module and combination meter
1) Check power and ground circuits of the following control
module.
•ECM:
Refer to “ECM Power and Ground Circuit Check”.
•BCM:
Refer to “BCM Power Circuit and Ground Circuit
Check in Section 10B”.
• Combination meter:
Refer to “Combination Meter Circuit Diagram in
Section 9C”.
• ABS control module:
Refer to “ABS Hydraulic Unit / Control Module
Assembly Power and Ground Circuit Check in Section
4E”.
Are they in good condition?Go to Step 5. Repair power and/or
ground circuit.
5CAN communication check of BCM, ECM, ABS control
module and combination meter
1) Turn ignition switch to OFF position.
2) Connect BCM, ECM, ABS control module and
combination meter connectors.
3) Perform “Communication Bus Check” under “Bus
Check” using SUZUKI-SDT with ignition switch turned
ON.
Are all of BCM, ECM, ABS control module and combination
meter normally displayed?Go to Step 12. Go to Step 6. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine 1A-174 Engine General Information and Diagnosis:
C01-10 WHTOxygen signal of
heated oxygen
sensor-10 – 1 V Ignition switch turned ON.
— *Deflects between
over 0.5 V and under
0.45 V
(“Reference
waveform No.8: ” and
“Reference waveform
No.9: ”)While engine running at
2,000 r/min. for 1 min. or
longer after warmed up.
C01-11 BRNOxygen signal of
heated oxygen
sensor-2 (if
equipped)4 – 5 V Ignition switch turned ON.
— *Deflects between
over 0.5 V and under
0.45 V
(“Reference
waveform No.10: ”)While engine running at
2,000 r/min. or more after
vehicle running over 30
km/h, 19 mph for 5 min.
C01-12 WHTCAN (low)
communication line
(active low signal)
to TCM (for A/T
model)*0.5 – 2.5 V
(“Reference
waveform No.23: ”)
Ignition switch turned ON
with engine stop.CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency which
varies depending on
engine condition. C01-13 REDCAN (high)
communication line
(active high signal)
to TCM (for A/T
model)*2.5 – 4.5 V
(“Reference
waveform No.23: ”)
C01-14GRY/
REDOutput of 5 V
power source for
MAP sensor and A/
C refrigerant
pressure sensor (if
equipped with A/C)4.5 – 5.5 V Ignition switch turned ON. —
C01-15 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
C01-16BLU/
REDFuel injector No.3
output10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform
No.11: ”)Engine running at idle
after warmed up engine.Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C01-17BLU/
ORNFuel injector No.4
output10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform
No.12: ”)Engine running at idle
after warmed up engine.Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C01-18BRN/
YELEGR valve
(stepper motor coil
4) output (if
equipped)10 – 14 V Ignition switch turned ON. —
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.4: ”)Ignition switch is turned to
ST (cranking) position.Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition. Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-177
C01-48YEL/
GRNStarting motor
signal0 – 1 V Ignition switch turned ON.
—
6 – 14 V While engine cranking.
C01-49 — — — — —
C01-50WHT/
BLUGround of ECM for
shield wireBelow 0.3 V Ignition switch turned ON. —
C01-51 — — — — —
C01-52 — — — — —
C01-53RED/
BLKManifold absolute
pressure (MAP)
sensor signal (if
equipped)Approx. 4 V
(“Reference
waveform No.17: ”)Ignition switch turned ON
with barometric pressure
at 100 kPa, 760 mmHg.
—
0.4 – 2.0 V
(“Reference
waveform No.18: ”)While engine running at
specified idle speed after
warmed up with
barometric pressure at
100 kPa, 760 mmHg.
C01c01-
54GRNThrottle position
sensor (main)
signal0.75 – 1.08 VIgnition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.67 – 4.24 V
(“Reference
waveform No.29: ”)Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C01-55GRY/
BLUGround for sensors Below 0.3 V Ignition switch turned ON. —
C01-56 REDKnock sensor
signal2 – 3 V
(“Reference
waveform No.19: ”
and “Reference
waveform No.20: ”)Ignition switch turned ON.
— Engine running at 4000 r/
min. after warmed up.
C01-57 ORN Ground for sensors Below 0.3 V Ignition switch turned ON. —
C01-58BLK/
ORNGround for ECM Below 0.3 V Ignition switch turned ON. —
C01-59GRN/
WHTOil control valve
ground (for engine
with VVT system)Below 1.3 V Ignition switch turned ON. —
C01-60GRN/
REDOil control valve
output (for engine
with VVT system)*0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.21: ”
and “Reference
waveform No.22: ”)At the moment of ignition
switch turned ON.Output signal is active
high pulse. Duty ratio
varies depending on
vehicle condition. Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks
Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks
E01-1BLK/
REDMain power supply 10 – 14 V Ignition switch turned ON. —
E01-2WHT/
REDPower source for
ECM internal
memory10 – 14 V Ignition switch turned ON. —
E01-3 REDCAN (high)
communication line
(active high signal)
to ABS control
module*2.5 – 4.5 V
(“Reference
waveform No.23: ”)Ignition switch turned ON
with engine at stop.CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency with
varies depending on
engine condition.

Downloaded from www.Manualslib.com manuals search engine 1A-178 Engine General Information and Diagnosis:
E01-4 BRNEngine revolution
signal output for P/
S control module0 – 0.8 VIgnition switch turned ON
with engine at stop.—
*0 – 1 V
↑↓
8 – 14 V
(“Reference
waveform No.24: ”
and “Reference
waveform No.25: ”)While engine running.Output signal is pulse.
Pulse frequency varies
depending on engine
speed.
(2 pulses are generated
per 1 crankshaft
revolution.)
(3000 r/min. = 100 Hz)
E01-5 — — — — —
E01-6 — — — — —
E01-7 — — — — —
E01-8 — — — — —
E01-9 — — — — —
E01-10 — — — — —
E01-11 — — — — —
E01-12 — — — — —
E01-13YEL/
REDClock signal for
immobilizer coil
antenna10 – 14 V Ignition switch turned ON. —
E01-14 — — — — —
E01-15GRN/
WHTFuel pump relay
output0 – 2.5 VFor 2 sec. from the time
ignition switch is turned
ON or while engine is
running.
—
10 – 14 VOn and after 2 sec. from
the time ignition switch is
turned ON or while engine
is at stop.
E01-16BLK/
REDMain power supply 10 – 14 V Ignition switch turned ON. —
E01-17 — — — — —
E01-18 WHTCAN (low)
communication line
(active low signal)
to ABS control
module*0.5 – 2.5 V
(“Reference
waveform No.23: ”)Ignition switch turned ON
with engine at stop.CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency which
varies depending on
engine condition.
E01-19 BLU/
WHTElectric load signal
for heater blower
motor10 – 14 VIG switch: ON Blower
selector < 3rd position
(Manual A/C model)
— IG switch: ON Blower
selector < 2nd position
(Auto A/C model)
0 – 1 VIG switch: ON Blower
selector > 2nd position
E01-20GRN/
WHTBrake light switch
signal0 – 1 VIgnition switch turned ON,
stop lamp not lit up.
—
10 – 14 VIgnition switch turned ON,
stop lamp lit up.
E01-21 — — — — —
E01-22 — — — — —
E01-23 — — — — —
E01-24YEL/
REDFuel level sensor
signal0 – 6 VIgnition switch turned ON.
Voltage varies depends on
fuel level.—
E01-25 — — — — — Terminal
No.Wire
colorCircuit Normal voltage Condition Remarks