2006 SUZUKI SX4 engine

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-207
6A/C evaporator outlet air temp. sensor check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection to “E01-57” and “E01-54”
wire terminals of ECM connector.
3) If OK, measure resistance between “E01-57” and “E01-
54” wire terminals of ECM connector.
Evaporator temp. sensor resistance
At 0 °C: 6.3 – 6.9 kΩ
At 25 °C: 1.8 – 2.2 kΩ
Is resistance within specification?Go to Step 7. Faulty A/C evaporator
outlet air temp. sensor
or its circuit.
7DTC check of A/C refrigerant pressure sensor circuit
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check ECM for DTC of A/C refrigerant pressure sensor
circuit.
Is there DTC P0532 or DTC P0533?Go to applicable DTC
diag. flow.Go to Step 8.
8A/C refrigerant pressure sensor voltage check
1) Check A/C refrigerant pressure sensor voltage referring
to “Inspection of ECM and Its Circuits”.
Is voltage within specified value?Go to Step 9. Check amount of
refrigerant. If OK,
replace A/C refrigerant
pressure sensor.
9A/C condenser cooling fan check
1) Check A/C condenser cooling fan referring to
“Condenser Cooling Fan Inspection in Section 7B”.
Is check result satisfactory?A/C condenser cooling
fan drive circuit
malfunction. If circuit is
OK, go to Step 6.Replace A/C condenser
cooling fan motor.
10A/C compressor control system check
Is A/C compressor started when A/C and blower speed
selector switch are turned ON with engine running?A/C system is in good
condition.Go to Step 11. Step Action Yes No
7
6
5
4
3
2
1
10
20
30
4050 010
2030
60 70
80 ResistanceTemperatureI3RB0A110053-01

Downloaded from www.Manualslib.com manuals search engine 1A-208 Engine General Information and Diagnosis:
11A/C compressor relay circuit check
1) Measure voltage between “E01-47” wire terminal of
ECM connector and vehicle body ground under following
conditions respectively.
Voltage between “E01-47” terminal of ECM
connector and ground
While engine running and A/C switch turned OFF: 10
– 14 V
While engine running, A/C and blower speed
selector switch turned ON: 0 – 1 V
Is check result satisfactory?Go to Step 12. Go to Step 13.
12A/C compressor relay check
1) Check A/C compressor relay referring to “Compressor
Relay Inspection in Section 7B”.
Is it in good condition?A/C compressor drive
circuit malfunction.Replace A/C
compressor relay.
13A/C compressor relay circuit check
1) Remove A/C compressor relay with ignition switch
turned OFF.
2) Turn ON ignition switch, measure voltage between “BLK/
WHT” wire terminal of A/C compressor relay connector
and vehicle body ground.
Is voltage 10 –14 V?Go to Step 14. “BLK/WHT” wire is open
circuit.
14A/C compressor relay check
1) Check A/C compressor relay referring to “Compressor
Relay Inspection in Section 7B”.
Is it in good condition?“GRY” wire is open
circuit. If OK, substitute
a known-good ECM and
recheck.Replace A/C
compressor relay. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-209
Electric Load Signal Circuit CheckS6RW0D1104079
Wiring Diagram
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
238
BLK/WHT
BLK/RED
WHT
BRN/WHT
12V5V
10
E01-29
E01-1
E01-60BLK/YEL
BLK/YEL
139BLK/REDE01-16
BLU/WHT
BLU/WHTE01-19
E01-19
14
3 4
YEL
2
12
BLK/WHT
BLKBLK/YEL
GRN
WHT/BLU
BLU
1 56
11 7
8
C01-58
C01-15C01-30
BLK/ORN
BLKBLKE01-31BLK
17 16
WHTREDE01-18E01-3 15WHTREDWHTREDWHTRED [A]
17
WHTRED
18E01-18E01-3 1615WHTREDWHTRED
[B]
19
I6RW0D110057-02
[A]: Junction block with BCM model 6. Junction block assembly 13. Blower speed selector (Auto A/C model)
[B]: Junction block without BCM model 7. “IG COIL” fuse 14. Blower speed selector (Manual A/C model)
1. Individual circuit fuse box No.1 8. “IG2 SIG” fuse 15. Electric load signal (rear defogger signal and headlight
signal), etc.
2. “BLW” fuse 9. ECM 16. BCM
3. “FI” fuse 10. Main relay 17. ABS control module
4. “IGN” fuse 11. Blower motor relay 18. CAN junction connector
5. Ignition switch 12. Blower motor 19. To other control module connected CAN

Downloaded from www.Manualslib.com manuals search engine 1A-210 Engine General Information and Diagnosis:
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) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there DTC U0073 and/or U0140?Go to applicable DTC
diag. flow.Go to Step 2.
2Electric load signal circuit check
1) Start engine and select “Data List” mode on scan tool.
2) Check electric load signal under following conditions
respectively.
Blower fan signal (Manual A/C model)
Blower speed selector turned OFF, 1st or 2nd
position: OFF
Blower speed selector turned to 3rd position or
more: ON
Blower fan signal (Automatic A/C model)
Blower speed selector OFF or 1st position: OFF
Blower speed selector turned to 3rd position or
more: ON
Radiator fan signal
Engine coolant temperature is lower than 100 °C
(212 °F): OFF
Engine coolant temperature is higher than 100 °C
(212 °F): ON
Electric load signal
Engine running, rear defogger switch, small light or
headlight switch OFF: OFF
Engine running, rear defogger switch, small light or
headlight switch ON: ON
Is check result satisfactory?Electric load signal
circuit is in good
condition.Check defective signal
circuit.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-211
Radiator Cooling Fan Control System CheckS6RW0D1104080
Wiring Diagram
Troubleshooting
WARNING!
Keep hands, tools, and clothing away from radiator cooling fan to help prevent personal injury. This
fan is electric and can come on whether or not the engine is running. The fan can start automatically in
response to the ECT sensor with the ignition switch at the “ON” position.

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”.

E01C01
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
238
BLK/REDBLK/RED
BLK/YELBLK/YEL
BLK/YEL
BRN/WHT
12V
5V5V
26
E01-1
E01-60
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
BLK/RED
LT GRN
BLK/REDE01-16
E01-46
BLU/REDBLKGRY
LT GRN
ORN
C01-24
C01-55 3
4
5
E01-31 BLK
8 71
I6RW0D110058-01
1. Individual circuit fuse box No.1 3. Radiator cooling fan relay 5. ECT sensor 7. “FI” fuse
2. Main relay 4. Radiator cooling fan motor 6. ECM 8. “RDTR” fuse

Downloaded from www.Manualslib.com manuals search engine 1A-212 Engine General Information and Diagnosis:
Repair Instructions
Idle Speed and IAC Throttle Valve Opening
Inspection
S6RW0D1106001
Before idle speed check, make sure of the following.
• Lead wires and hoses of electronic fuel injection and
engine and emission control systems are connected
securely.
• Valve lash is checked according to maintenance
schedule.
• Ignition timing is within specification.
• All accessories (wipers, heater, lights, A/C, etc.) are
out of service.
• Air cleaner has been properly installed and is in good
condition.
• No abnormal air drawn in from air intake system.After all items are confirmed, check idle speed and IAC
throttle opening as follows.NOTE
Before starting engine, place transmission
gear shift lever in “Neutral”, and set parking
brake and block drive wheels.

Step Action Yes No
1Is there DTC(s) of ECT sensor circuit (DTC P0116 / P0117 /
P0118) and/or radiator cooling fan circuit (DTC P0480)?Go to corresponding
DTC flow.Go to Step 2.
2Radiator cooling fan control circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Start engine and select “Data List” on scan tool.
3) Warm up engine until coolant temp. is 100 °C, 212 °F or
higher and A/C switch turns OFF (if equipped with A/C).
(If engine coolant temp. dose not rise, check engine
cooling system or ECT sensor.)
Is radiator cooling fan started when engine coolant temp.
reached above temp.?Radiator cooling fan
control system is in
good condition.Perform from Step 2 to
Step 7 in DTC P0480
diag. flow. If OK, Go to
Ste p 3.
3Radiator cooling fan control check
1) Disconnect radiator cooling fan motor connector with
ignition switch turned OFF.
2) Run engine when ECT is over 100 °C, 212 °F.
3) Measure voltage between vehicle body ground and
“BLU/RED” wire terminal of disconnected radiator
cooling fan motor connector.
Is voltage 10 – 14 V?Go to Step 4. “BLU/RED” wire is open
or high resistance
circuit.
4Check radiator cooling fan wire circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “BLK” wire terminal of
disconnected radiator cooling fan motor connector and
vehicle body ground.
Is resistance below 1
Ω?Go to Step 5. “BLK” wire is open or
high resistance circuit.
5Radiator cooling fan check
1) Check radiator cooling fan referring to “Radiator Cooling
Fan Assembly On-Vehicle Inspection in Section 1F”.
Is it in good condition?Substitute a known-
good ECM and recheck.Faulty radiator cooling
fan.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-213
1) Connect SUZUKI scan tool to DLC (1) with ignition
switch turned OFF.
Special tool
(A): SUZUKI scan tool (SUZUKI-SDT)2) Warm up engine to normal operating temperature.
3) Check engine idle speed and “IAC throttle opening”
by using “Data List” mode on scan tool to check “IAC
throttle opening”.
4) If check result is out of specification, inspect electric
throttle body assembly referring to “Electric Throttle
Body Assembly On-Vehicle Inspection in Section
1C”.
Engine idle speed
A/C OFF: 700 ± 50 rpm (IAC duty: 5 – 25%)
A/C ON: 750 ± 50 rpm
5) Check that specified engine idle speed is obtained
with A/C turned ON if vehicle is equipped with A/C.
If not, check A/C system referring to “A/C System
Circuits Check”.
Special Tools and Equipment
Special ToolS6RW0D1108001
(A) 1I5RW0C110011-01
09912–58432 09912–58442
Fuel pressure gauge hose Fuel pressure gauge
This tool is included in fuel
pressure gauge set (09912-
58413). )This tool is included in fuel
pressure gauge set (09912-
58413). )
09912–58490 09933–06320
3-way joint & hose ECM check harness (120P)
)) / )
SUZUKI scan tool (SUZUKI-
SDT)
—
This kit includes following
items. 1. SUZUKI-SDT 2.
DLC3 cable 3. USB cable 4.
AC/DC power supply 5.
Voltage meter probe 6.
Storage case ) / )
1
2
34
56

Downloaded from www.Manualslib.com manuals search engine 1B-1 Aux. Emission Control Devices:
Engine
Aux. Emission Control Devices
Diagnostic Information and Procedures
EGR System Inspection (If Equipped)S6RW0D1204001
1) Connect SUZUKI scan tool to data link connector
(DLC) (1) with ignition switch turned OFF.
2) Turn ON ignition switch and erase DTC using
“Delete” in “DTC” menu of scan tool.
3) Start engine and warm it up to normal operating
temperature, then select “Data List” mode on scan
tool.
4) Make sure that vehicle condition is as follows.
• Vehicle speed = 0 km/h (0 KPH)
• Engine speed ≤ 900 rpm
• Engine coolant temp. ≥ 90 °C, 164 °F5) With engine idling (without depressing accelerator
pedal), open EGR valve by using “Step EGR
Control” mode in “Engine / Active Test” menu. In this
state, as EGR valve opening increases engine idle
speed drops. If not, possible cause is clogged EGR
gas passage, stuck or faulty EGR valve.
Special tool
(A): SUZUKI scan tool (SUZUKI-SDT)
Repair Instructions
EVAP Canister Purge InspectionS6RW0D1206001
NOTE
Before inspection, check to make sure that
gear shift lever is in neutral position and that
parking brake lever is pulled all the way up.

1) Disconnect purge hose (1) from purge pipe.
2) Place finger against the end of disconnected hose
and check that vacuum is not felt there when engine
is cool and running at idle speed. If check result is
not satisfactory, check EVAP canister purge valve,
wire harness and ECM.
EVAP Canister Purge Valve and Its Circuit
Inspection
S6RW0D1206002
WARNING!
Do not apply vacuum by mouth; otherwise
harmful fuel vapor can be breathed in.

CAUTION!
Do not apply vacuum more than –86 kPa (–
12.47 psi); otherwise EVAP canister purge
valve could be damaged.

(A) 1I5RW0C110011-01
1
I5RW0A120006-01