Air flow SUZUKI SWIFT 2006 2.G Service Owner's Manual

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-89
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

NOTE
Check to make sure that following conditions ar e satisfied when using this “DTC Confirmation
Procedure”.
• Intake air temperature at engine start: –10 °C (14 ° F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine coolant temperature: 70 °C (158 °F) to 150 °C (302 °F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Drive vehicle at 40 mph (60 km/h) or higher. (engine speed: 2500 – 3000 r/min.)
5) Keep above vehicle speed for 6 min. or more. (Throt tle valve opening is kept constant in this step.)
6) Release accelerator pedal and with engine brake applied, keep vehicle coasting (with fuel cut for 3 sec. or more)
and then stop vehicle.
7) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Is there DTC(s) other than HO2S-1? Go to applicable DTC
diag. flow.Go to Step 3.
3 HO2S-1 signal check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Warm up engine to normal operating temperature and keep it at 2000 r/min. for 60 sec.
3) Repeat racing engine (Repeat depressing accelerator pedal 5 to 6 times continuous ly to enrich A/F mixture and
take foot off from pedal to enlean it).
Does HO2S-1 output voltage deflect between below 0.3 V
and over 0.6 V repeatedly? Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If check result is
OK, go to Step 9.
Go to Step 4.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-91
DTC P0133: O2 Sensor (HO2S) Circuit Slow Response (Sensor-1)S7RS0B1104032
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

NOTE
Check to make sure that following conditions ar e satisfied when using this “DTC Confirmation
Procedure”.
• Intake air temperature at engine start: –10 °C (14 ° F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine coolant temperature: 70 °C (158 °F) to 150 °C (302 °F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Drive vehicle at 40 mph (60 km/h) or higher. (engine speed: 2500 – 3000 r/min.)
5) Keep above vehicle speed for 6 min. or more. (Throt tle valve opening is kept constant in this step.)
6) Release accelerator pedal and with engine brake applied, keep vehicle coasting (with fuel cut for 3 sec. or more)
and then stop vehicle.
7) Check if DTC and pending DTC exist by using scan tool. If not, check if oxygen sensor monitoring test has been
completed by using scan tool. If not in both of above c hecks (i.e., no DTC and pending DTC and oxygen sensor
monitoring test not completed), check vehicle cond ition (environmental) and repeat Step 3) through 6).
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

DTC detecting condition Trouble area
Response time (time to change from lean to rich or from rich to lean) of HO2S-1 output
voltage is about 1 sec. at minimum or aver age time of 1 cycle is 5 sec. at minimum.
(*2 driving cycle detection logic, monitoring once per driving cycle) Heated oxygen sensor-1
Step
Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Is there DTC(s) other than HO2S-1 (DTC P0133)? Go to applicable DTC
diag. flow.Replace HO2S-1.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-95
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

NOTE
Check to make sure that following conditions ar e satisfied when using this “DTC Confirmation
Procedure”.
• Intake air temperature at engine start: –10 °C (14 ° F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine Coolant temperature: 70 °C (158 °F) to 150 °C (302 °F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Increase vehicle speed to 70 – 80 km/h (43 – 50 mile/h) at 5th gear or D range.
5) Release accelerator pedal and with engine brake applied, ke ep vehicle coasting (with fuel cut for 4 sec. or more),
then stop vehicle and run engine at idle speed for 60 sec. or more.
6) Repeat Step 4).
7) Keep above vehicle speed for 8 min. or more. (Throt tle valve opening is kept constant in this step.)
8) Repeat Step 5).
9) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Is there DTC(s) other than fuel system (DTC P0171 / P0172)
and HO2S-2 (DTC P0140)? Go to applicable DTC
diag. flow.Go to Step 3.
3 HO2S-2 and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Warm up engine to normal operating temperature and keep it at 2000 r/min. for 60 sec.
3) Repeat racing engine (Repeat depressing accelerator pedal 5 to 6 times continuous ly to enrich A/F mixture and
take foot off from pedal to enlean it).
Does HO2S-2 output voltage indicate deflection between
over 0.35 V and below 0.25 V? Go to “DTC P0171 /
P0172: Fuel System
Too Lean / Rich”.
Go to Step 4.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-99
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and print Freeze Frame Data or write them down using scan tool.
3) Clear DTC using scan tool.
4) Start engine and warm up to normal operating temperature.
5) Operate vehicle with condition as noted freeze frame data for 5 min.
6) Stop vehicle and check DTC and pending DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Is there DTC(s) other than fuel system (DTC P0171 /
P0172)? Go to applicable DTC
diag. flow.Go to Step 3.
3 Intake system and exhaust system for leakage check
Are intake system and exhaust system in good condition? Go to Step 4.
Repair or replace
defective part.
4 Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure Check”.
Is check result satisfactory? Go to Step 5.
Repair or replace
defective part.
5 Fuel injectors and its circuit check
1) Check fuel injectors referring to “Fuel Injector Inspection
in Section 1G”.
Is check result satisfactory? Go to Step 6.
Faulty injector(s) or its
circuit.
6 Visual inspection
1) Check MAF sensor and air intake system.
• Objects which block measur ing duct and resistor of
MAF sensor.
• Other air flow which does not pass MAF sensor.
Are they in good condition? Go to Step 7.
Repair or replace
defective part.
7 MAF sensor for performance check
1) With ignition switch turn ed OFF, install scan tool.
2) Start engine and warm up to normal operating temperature.
3) Check MAF value using scan tool (Refer to “Scan Tool Data” for normal value.).
Is each value within specified range? Go to Step 8.
Go to “DTC P0101:
Mass or Volume Air
Flow Circuit Range /
Performance”.
8 ECT sensor for performance check
1) Check ECT sensor referring to Step 3 and 4 of “DTC
P0118: Engine Coolant Temperature Circuit High”.
Is check result satisfactory? Go to Step 9.
Faulty ECT sensor or its
circuit.

Downloaded from www.Manualslib.com manuals search engine 1A-116 Engine General Information and Diagnosis:
DTC P0401 / P0402: Exhaust Gas Recirculation Flow Insufficient Detected / Excessive DetectedS7RS0B1104044
System and Wiring Diagram
I6RS0C110019-02
1. EGR valve5. Fresh air 9. Ignition switch
2. Intake manifold 6. Exhaust gas10. Main relay
3. ECM 7. “IG COIL” fuse11. “FI” fuse
4. Sensed information 8. Main fuse box12. “IG ACC” fuse

Downloaded from www.Manualslib.com manuals search engine 1A-118 Engine General Information and Diagnosis:
DTC P0403: Exhaust Gas Recirculation Control CircuitS7RS0B1104045
Wiring Diagram
Refer to “DTC P0401 / P0402: Exhaust Gas Recirculation Flow Insufficient Detected / Excessive Detected”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

1) With ignition switch turned OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and run it for 30 seconds.
4) Check DTC. 3
EGR valve operation check
1) With ignition switch turned OF F, install SUZUKI scan tool
to DTC.
2) Check EGR system referring to “EGR System Inspection
in Section 1B”.
Is it in good condition? Go to Step 4. Go to Step 5.
4 MAP sensor check
1) Check MAP sensor for performance referring to “MAP
Sensor Inspection in Section 1C”.
Is check result satisfactory? Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Replace MAP sensor.
5 EGR valve control circuit check
1) Check that EGR valve control circuits are in good
condition referring to Step 2 to 5 of “DTC P0403:
Exhaust Gas Recirculation Control Circuit”
Are circuits in good condition? Go to Step 6. Repair or replace EGR
valve control circuit(s).
6 EGR valve check
1) Check EGR valve referring to “EGR Valve Inspection in
Section 1B”.
Is check result satisfactory? Go to Step 7. Faulty EGR valve.
7 MAP sensor check
1) Check MAP sensor for performance referring to “MAP
Sensor Inspection in Section 1C”.
Is check result satisfactory? EGR passage clogged.
If OK, substitute a
known-good ECM and
recheck.
Replace MAP sensor.
Step Action Yes No
DTC detecting condition
Trouble area
EGR valve output voltage is differ ent from output command with more
than one pole out of 4 poles.
(1 driving cycle detection logic) • EGR valve circuit open
•EGR valve
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-129
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING!
• When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester.

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Warm up engine to normal operating temperature.
4) M/T model
a) Drive vehicle at 4000 rpm (e ngine speed) with 3rd gear.
b) Release accelerator pedal and with engine brake applied, keep vehicle coasting for 6 sec. or more (fuel cut condition for 5 sec. or more) and stop vehicle.
A/T model
a) Drive vehicle at more than 3000 rpm for 10 sec.
5) Check pending DTC and DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

DTC detecting condition Trouble area
• Vehicle speed signal is not input while fuel is cut at deceleration for 4 seconds continuously at 3600 rpm or
less.
• Vehicle speed signal is not input even if engine is running with more than 3000 rpm at D-Range for 4 sec. (A/T model).
(2 driving cycle detection logic) • Wheel speed sensor and/or its circuit
• ABS/ESP®
control module
•ECM
Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Vehicle speed signal check
Is vehicle speed displayed on scan tool in Step 4) and 5) of
“DTC Confirmation Procedure”? Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Go to Step 3.
3 DTC check in ABS/ESP ® control module
1) Check ABS/ESP ® control module for DTC.
Is there any DTC of wheel speed sensor or CAN
communication system? Go to applicable DTC
diag. flow.
Substitute a know-good
ECM and recheck.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-145
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

DTC P1674: CAN Communication (Bus Off Error)S7RS0B1104062
Wiring Diagram
ESP ® model
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 DTC check
1) Check DTC of TCM referring to “DTC Check in Section
5A”.
Is there any DTC(s)? Go to applicable DTC
diag. flow.
Substitute a known-
good ECM and recheck.
[F]
E85
161
15
2
3
4
5
6
7
8
9
10
11
12
13
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
3233
34
35
36
37
38
39
40
41
42
43
44
45
46
47
[D] 12345678910
11
141516
36 34 33 32 31 30 29 24 23
37
181920
G49
[A]
E23
C37
34
1819
567
10
11
17
20
47 46
495051
2122
52 16
25 9
24
14
29
5557 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
4042 39 38
44
45 43 41 331
1213
238
34
1819
567
10
11
17
20
47 46
495051
2122
52 16
25 9
24
14
29
5557 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
4042 39 38
44
45 43 41 331
12
13
238
[C]G28
1234567
8
910
11
1213141516
1718
19
20
212223242526272829303132
[E] G54
109 321
[B]
G37E46
1234567 1234567
8910
11
8910
11
121314 121314
1516171819202122
4
6 1
2
3
REDWHT
REDWHT
REDWHT
REDWHT
REDWHT
E23-3E23-18
E85-42E85-46
E85-13E85-44
E46-1E46-2
G37-4G37-2
REDWHT
REDWHTG49-19G49-18
5
7
WHTG54-9REDG54-10
G28-8G28-10
G28-7REDG28-9WHT
I7RS0B110014-02
[A]: ECM connector (viewed from harness side)
1. ECM
[B]: BCM connector (viewed from harness side) 2. ESP® control module
[C]: Combination meter connector (viewed from harness side) 3. BCM
[D]: Keyless start control module connector (vie wed from harness side) 4. Steering angle sensor
[E]: Steering angle sensor connector (viewed from harness side) 5. Combination meter
[F]: ESP ® control module connector (viewed from terminal side) 6. Keyless start control module
7. CAN junction connector

Downloaded from www.Manualslib.com manuals search engine 1A-204 Engine General Information and Diagnosis:
Troubleshooting
NOTE
Before using following flow, check to make sure that battery voltage is higher than 11 V. If battery
voltage is low, pressure becomes lower than specification even if fuel pump and line are in good
condition.

StepAction YesNo
1 Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure
Inspection in Section 1G”.
Is check result satisfactory? Go to Step 2.
Go to Step 5.
2 Fuel pressure check
1) Start engine and warm it up to normal operating
temperature.
2) Keep engine speed at 4000 rpm.
Does fuel pressure show about the same value as Step 1? Go to Step 3.
Go to Step 8.
3 Fuel line check
1) Check fuel pipe, fuel hose and joint for fuel leakage.
Are they in good condition? Go to Step 4.
Repair or replace
defective part.
4 Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition? Faulty fuel pressure
regulator.
Repair or replace
damaged or damaged
part.
5 Was fuel pressure higher than specification in Step 1? Go to Step 6.Go to Step 7.
6 Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition? Faulty fuel pressure
regulator.
Repair or replace
damaged or damaged
part.
7 Fuel pump operating sound check
1) Remove fuel filler cap and th en turn ON ignition switch.
Can you hear operating sound? Go to Step 8.
Faulty fuel pump.
8 Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition? Clogged fuel filter, faulty
fuel pump, faulty fuel
pressure regulator or
fuel leakage from hose
connection in fuel tank.Repair or replace
defective part.

Downloaded from www.Manualslib.com manuals search engine 1A-206 Engine General Information and Diagnosis:
Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• When A/C evaporator outlet air temp. is below 2.5 °C (36.5 °F), A/C remains OFF (“E23-47” terminal
voltage becomes 10 – 14 V). This condition is not abnormal.

Step Action YesNo
1 Reception data check from BCM
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check DTC for reception data from BCM.
Is there DTC P1678? Go to applicable DTC
diag. flow.
Go to Step 2.
2 A/C switch signal circuit check
1) Start engine and select “DATA LIST” mode on scan tool.
2) Check A/C switch signal under following conditions
respectively.
A/C switch signal
Engine running, A/C switch OFF: OFF
Engine running, A/C switch ON and blower speed
selector turned 1st position or more: ON
Is check result satisfactory? Go to Step 3. Check A/C switch
circuit.
3 DTC check of ECT sensor circuit
1) Check ECM for DTC of ECT sensor circuit.
Is there DTC P0116, DTC P0117 or DTC P0118? Go to applicable DTC
diag. flow.
Go to Step 4.
4 Radiator cooling fan control system check
Is radiator cooling fan started when A/C and blower speed
selector switch are turned ON with engine running? Go to Step 10. Go to Step 5.
5 Radiator cooling fan control circuit check
1) Check DTC with scan tool.
Is DTC P0480 displayed? Go to “DTC P0480: Fan
1 (Radiator Cooling
Fan) Control Circuit”.
Go to Step 6.