Heater SUZUKI SX4 2006 1.G Service User Guide

Downloaded from www.Manualslib.com manuals search engine 1A-32 Engine General Information and Diagnosis:
DTC TableS6RW0D1104005
NOTE
• There are two types of OBD system depending on the vehicle specification.
For identification, refer to “Precaution on On-Board Diagnostic (OBD) System”.
• For non-Euro-OBD model, some of DTC No. with delta (U) mark in the following table can not be
detected by ECM depending on vehicle specification.
• With the CAN communication generic scan tool, only star (*) marked DTC No. in the following table
can be read.
• 1 driving cycle: MIL lights up when DTC is detected during 1 driving cycle.
• 2 driving cycles: MIL lights up when the same DTC is detected also in the next driving cycle after
DTC is detected and stored temporarily in the first driving cycle.
• *2 driving cycles:
MIL blinks or lights up. Refer to “DTC P0300 / P0301 / P0302 / P0303 / P0304: Random Misfire
Detected / Cylinder 1 / Cylinder 2 / Cylinder 3 / Cylinder 4 Misfire Detected” for details.

DTC No. Detecting itemDetecting condition
(DTC will set when detecting:)MIL
) *P0010Camshaft position actuator circuit
(for engine with VVT system)Oil control valve circuit open or short.1 driving
cycle
) *P0011Camshaft position – timing over-
advanced or system performance
(for engine with VVT system)Actual value of advanced valve timing does not reach
target value, or valve timing is advanced although ECM
command is most retarding.2 driving
cycles
) *P0012Camshaft position – timing over-
retarded
(for engine with VVT system)2 driving
cycles
) *P0031HO2S heater control circuit low
(Sensor-1)Heater current is less than specification while heater ON.2 driving
cycles
) *P0032HO2S heater control circuit high
(Sensor-1)Heater current is more than specification while heater ON.2 driving
cycles
)
U*P0037HO2S heater control circuit low
(Sensor-2)Heater current is less than specification while heater ON.2 driving
cycles
)
U*P0038HO2S heater control circuit high
(Sensor-2)Heater current is more than specification while heater ON.2 driving
cycles
)
U*P0101Mass air flow circuit range/
performanceMAF sensor volume is more than specification or less
than specification.2 driving
cycles
) *P0102 Mass air flow circuit low input Output voltage of MAF sensor is less than specification.1 driving
cycle
) *P0103 Mass air flow circuit high input Output voltage of MAF sensor is more than specification.1 driving
cycle
)
U*P0106Manifold absolute pressure circuit
range/performanceDifference between Max. manifold absolute pressure
value and Min. manifold pressure value is less than
specification or difference between barometric pressure
value and manifold pressure value is less than
specification2 driving
cycles
)
U*P0107Manifold absolute pressure circuit
low inputOutput voltage of MAP sensor is less than specification.
1 driving
cycle
)
U*P0108Manifold absolute pressure circuit
high inputOutput voltage of MAP sensor is more than specification.1 driving
cycle
)
U* P 0 111Intake air temperature sensor circuit
range/performanceVariation of intake air temperature from engine start is
less than specification.2 driving
cycles
) *P0112Intake air temperature sensor circuit
lowCircuit voltage of IAT sensor is less than specification.1 driving
cycle
) *P0113Intake air temperature sensor circuit
highCircuit voltage of IAT sensor is more than specification.1 driving
cycle
)
U*P0116Engine coolant temperature circuit
range/performanceEngine coolant temperature is less than specified
temperature for specified time from engine start.2 driving
cycles

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-59
DTC P0031 / P0032: HO2S Heater Control Circuit Low / High (Sensor-1)S6RW0D1104015
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
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) Run engine at idle speed for 1 min. or more.
5) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

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/WHT
WHT
11
GRN
39
E01-29
WHT
ORN
BLK/WHT
BLKC01-46
C01-10
C01-57
6
7
10
BLK
BLUWHT
BLK/RED
1
4
5
8
12
I6RW0D110020-01
1. Main fuse box 4. Junction block assembly 7. Heater 10. To HO2S-2
2. Shield wire 5. “IG COIL” fuse 8. To HO2S-2 heater 11. Individual circuit fuse box No.1
3. Ignition switch 6. HO2S-1 9. ECM 12. “IGN” fuse
DTC detecting condition Trouble area
Voltage of HO2S-1 heater is more than specified value or lower than specified value for
5 seconds even through its control duty ratio is within 25 – 75%.
(2 driving cycle detection logic)• HO2S-1 heater circuit
• HO2S-1 heater
•ECM
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.

Downloaded from www.Manualslib.com manuals search engine 1A-60 Engine General Information and Diagnosis:
2HO2S-1 heater power circuit check
1) Disconnect connector from HO2S-1 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-1 at “BLK/WHT”
and “BLK/RED” wire terminals.
3) If wire and connection are OK, measure voltage
between “BLK/WHT” wire terminal and engine ground
with ignition switch turned ON.
Is voltage over 10 V?Go to Step 3. “BLK/WHT” wire is open
circuit or shorted to
ground circuit.
3HO2S-1 heater power circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “BLK/WHT” wire terminal
of HO2S-1 connector and “E01-29” terminal of ECM
connector.
Is resistance below 5
Ω?Go to Step 4. “BLK/WHT” wire is high
resistance circuit.
4HO2S-1 heater drive circuit check
1) Measure resistance between “C01-46” terminal of ECM
connector and vehicle body ground.
Is resistance infinity?Go to Step 5. “BLK/RED” wire is
shorted to ground
circuit.
5HO2S-1 heater drive circuit check
1) Turn ON ignition switch.
2) Measure voltage between “C01-46” terminal of ECM
connector and vehicle body ground.
Is voltage 0 V?Go to Step 6. “BLK/RED” wire is
shorted to power circuit.
6HO2S-1 heater drive circuit check
1) Connect connector to HO2S-1 with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Measure voltage between “C01-46” terminal of ECM
connector and vehicle body ground with connector
disconnected from ECM.
Is voltage over 10 V?Go to Step 7. “BLK/RED” wire is open
circuit.
7HO2S-1 heater check
1) Disconnect HO2S-1 connector with ignition switch
turned OFF.
2) Check HO2S-1 heater resistance referring to “Heated
Oxygen Sensor (HO2S-1 and HO2S-2) Heater On-
Vehicle Inspection (If Equipped) in Section 1C”.
Is resistance within specified value range?Go to Step 8. Replace HO2S-1.
8HO2S-1 heater power circuit check
1) Connect connector to HO2S-1 with ignition switch turned
OFF.
2) Measure resistance between “E01-29” and “C01-46”
terminals of ECM connector.
It resistance below 12
Ω?HO2S-1 heater circuit is
OK.
Substitute a known-
good ECM and recheck.“BLK/WHT”, “BLK/RED”
and / or “BLK” wire is
high resistance circuit. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-61
DTC P0037 / P0038: HO2S Heater Control Circuit Low / High (Sensor-2)S6RW0D1104016
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
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) Run engine at idle speed for 1 min.
5) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

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/WHT
WHT
11
GRN
39
E01-29
BRN
ORN
BLK/WHT
BLKC01-47
C01-11
C01-57
6
2 7
10
BLK
BLUWHT
RED/BLU
1
4
5
8
12
5V
I6RW0D110021-01
1. Main fuse box 4. Junction block assembly 7. Heater 10. To HO2S-1
2. Shield wire 5. “IG COIL” fuse 8. To HO2S-1 heater 11. Individual circuit fuse box No.1
3. Ignition switch 6. HO2S-2 9. ECM 12. “IGN” fuse
DTC detecting condition Trouble area
Voltage of HO2S-2 heater is more than specified value or less than specified value for
5 seconds even through its control duty ratio is within 25 – 75%.
(2 driving cycle detection logic)• HO2S-2 heater
• HO2S-2 heater circuit
•ECM
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.

Downloaded from www.Manualslib.com manuals search engine 1A-62 Engine General Information and Diagnosis:
2HO2S-2 heater power circuit check
1) Disconnect connector from HO2S-2 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-2 at “BLK/WHT”
and “RED/BLU” wire terminals.
3) If wire and connection are OK, measure voltage
between “BLK/WHT” wire terminal of HO2S-2 connector
and engine ground with ignition switch turned ON.
Is voltage over 10 V?Go to Step 3. “BLK/WHT” wire is open
circuit or shorted to
ground circuit.
3HO2S-2 heater power circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “BLK/WHT” wire terminal
of HO2S-2 connector and “E01-29” terminal wire of ECM
connector.
Is resistance below 5
Ω?Go to Step 4. “BLK/WHT” wire is high
resistance circuit.
4HO2S-2 heater drive circuit check
1) Measure resistance between “RED/BLU” wire terminal of
HO2S-2 connector and vehicle body ground.
Is resistance infinity?Go to Step 5. “RED/BLU” wire is
shorted to ground
circuit.
5HO2S-2 heater drive circuit check
1) Turn ON ignition switch.
2) Measure voltage between “RED/BLU” wire terminal of
HO2S-2 connector and vehicle body ground.
Is voltage 0 V?Go to Step 6. “RED/BLU” wire is
shorted to power circuit.
6HO2S-2 heater drive circuit check
1) Connect connector to HO2S-2 with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Measure voltage between “C01-47” terminal of
disconnected ECM connector and vehicle body ground.
Is voltage over 10 V?Go to Step 7. “RED/BLU” wire is open
circuit.
7HO2S-2 heater check
1) Disconnect HO2S-2 connector with ignition switch
turned OFF.
2) Check HO2S-2 heater resistance referring to “Heated
Oxygen Sensor (HO2S-1 and HO2S-2) Heater On-
Vehicle Inspection (If Equipped) in Section 1C”.
Is resistance within specified value?Go to Step 8. Replace HO2S-2.
8HO2S-2 heater power circuit check
1) Connect connector to HO2S-2 with ignition switch turned
OFF.
2) Measure resistance between “E01-29” and “C01-47”
terminals of ECM connector.
Is resistance below 30
Ω?HO2S-2 heater circuit is
OK. Substitute a known-
good ECM and recheck.“RED/BLU” wire is high
resistance circuit. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-81
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 tester, on a level road.

NOTE
Check to make sure that following conditions are 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)
• Altitude (barometric pressure): 2500 m, 8200 ft or less (560 mmHg, 74.4 kPa or more)

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch, clear DTC.
3) Start engine.
4) Drive vehicle at 40 mph (60 km/h) or higher for 20 min. or more.
5) Stop vehicle.
6) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2DTC check
1) With ignition switch turned OFF, install scan tool to DLC.
2) Turn ON ignition switch and check DTC with scan tool.
Is DTC P0118 displayed?Go to “DTC P0118:
Engine Coolant
Temperature Circuit
High”.Go to Step 3.
3Engine coolant temp. check
1) Turn ON ignition switch and check engine coolant temp.
displayed on scan tool.
2) Warm up engine to normal operating temp. and check
engine coolant temp. displayed on scan tool.
Does engine coolant temp. vary more than 1
°C (1 °F) and
rise higher than 70
°C (158 °F)?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Go to Step 4.
4Thermostat check
Is there a symptom due to thermostat remaining open (it
takes a long time before vehicle heater becomes effective or
before engine is warmed to normal operating temp., etc.)?Check thermostat
referring to “Thermostat
Inspection in Section
1F”.Go to Step 5.

Downloaded from www.Manualslib.com manuals search engine 1A-92 Engine General Information and Diagnosis:
DTC P0131 / P0132: O2 Sensor (HO2S) Circuit Low Voltage / High Voltage (Sensor-1)S6RW0D1104031
Wiring Diagram
DTC Detecting Condition and Trouble Area
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/WHT
WHT
11
GRN
39
E01-29
WHT
ORN
BLK/WHT
BLKC01-46
C01-10
C01-57
6
7
10
BLK
BLUWHT
BLK/RED
1
4
5
8
12
I6RW0D110027-01
1. Main fuse box 4. Junction block assembly 7. Heater 10. To HO2S-2
2. Shield wire 5. “IG COIL” fuse 8. To HO2S-2 heater 11. Individual circuit fuse box No.1
3. Ignition switch 6. HO2S-1 9. ECM 12. “IGN” fuse
DTC detecting condition Trouble area
DTC P0131:
Maximum HO2S voltage is lower than specified voltage.
(2 driving cycle detection logic, monitoring once/1 driving)
DTC P0132:
Minimum HO2S voltage is higher than specified voltage.
(2 driving cycle detection logic, monitoring once/1 driving)• HO2S-1 circuit
•HO2S-1
• Fuel system
•ECM
• Fuel shortage
• Exhaust system
• Air intake system

Downloaded from www.Manualslib.com manuals search engine 1A-94 Engine General Information and Diagnosis:
4HO2S-1 ground check
1) Disconnect connector from HO2S-1 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-1 connector at
“BLK/RED”, “WHT”, “BLK/WHT” and “ORN” wire
terminals.
3) If connections are OK, measure resistance between
“ORN” wire terminal of HO2S-1 connector and engine
ground.
Is measured resistance less than 5
Ω?Go to Step 5. “ORN” wire is open or
high resistance circuit.
Poor “C01-57” terminal
connection. Faulty ECM
ground.
If they are OK,
substitute a known-
good ECM and recheck.
5Wire circuit check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Measure resistance between “WHT” wire terminal of
HO2S-1 connector and “C01-10” terminal of ECM
connector.
Is resistance less than 5
Ω?Go to Step 6. “WHT” wire is high
resistance circuit or
open circuit. Poor “C01-
10” terminal connection.
Faulty ECM ground. If
they are OK, substitute
a known-good ECM and
recheck.
6Wire circuit check
1) Disconnect connectors from ECM with ignition switch
turn OFF.
2) Measure resistance between “WHT” wire terminal of
HO2S-1 connector and vehicle body ground.
Is resistance infinity?Go to Step 7. “WHT” wire is shorted to
ground circuit.
7HO2S-1 signal circuit check
1) Measure voltage between “WHT” wire terminal of HO2S-
1 connector and vehicle body ground.
Is voltage 0 V?Go to Step 8. “WHT” wire is shorted to
other circuit.
8HO2S-1 heater circuit check
1) Check HO2S-1 heater circuit referring to “DTC P0031 /
P0032: HO2S Heater Control Circuit Low / High
(Sensor-1)”.
Is circuit in good condition?Go to Step 9. Repair HO2S-1 circuit.
9Exhaust system check
1) Check exhaust system for exhaust gas leakage.
Is it OK?Go to Step 4 in “DTC
P0171 / P0172: Fuel
System Too Lean /
Rich”.
If it is in good condition,
go to Step 10.Repair leakage of
exhaust system.
10Air intake system check
1) Check air intake system for clog or leak.
Is it OK?Replace HO2S-1
referring to “Heated
Oxygen Sensor (HO2S-
1 and HO2S-2)
Removal and
Installation (If Equipped)
in Section 1C”.
If DTC still exists,
substitute a known-
good ECM and recheck.Repair or replace air
intake system. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-97
2HO2S-1 output voltage 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 continuously to enrich A/F mixture and
take foot off from pedal to enlean it) and check HO2S
output voltages displayed on scan tool.
Is over 0.6 V and below 0.3 V indicated?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If check result is
OK, go to Step 3.Go to Step 3.
3HO2S-1 ground check
1) Disconnect connector from HO2S-1 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-1 at “BLK/RED”,
“WHT”, “BLK/WHT” and “ORN” wire terminals.
3) If wire and connection are OK, measure resistance
between “ORN” wire terminal of HO2S-1 connector and
engine ground.
Is resistance less than 5
Ω?Go to Step 4. “ORN” wire is open or
high resistance circuit.
Poor “C01-57” terminal
connection. Faulty ECM
ground.
If they are OK,
substitute a known-
good ECM and recheck.
4Wire circuit check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Measure resistance between “WHT” wire terminal of
HO2S-1 connector and “C01-10” terminal of ECM
connector.
Is resistance less than 5
Ω?Go to Step 5. “WHT” wire is high
resistance circuit or
open circuit. Poor “C01-
10” terminal connection
of ECM connector.
Faulty ECM ground. If
they are OK, substitute
a known-good ECM and
recheck.
5Wire circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “WHT” wire terminal of
HO2S-1 connector and vehicle body ground.
Is resistance infinity?Go to Step 6. “WHT” wire is shorted to
ground circuit.
6HO2S-1 heater circuit check
1) Check HO2S-1 heater circuit referring to “DTC P0031 /
P0032: HO2S Heater Control Circuit Low / High
(Sensor-1)”.
Is it in good condition?Go to Step 7. Repair HO2S-1 circuit.
7Exhaust system check
1) Check exhaust system for exhaust gas leakage.
Is it OK?Go to Step 4 in “DTC
P0171 / P0172: Fuel
System Too Lean /
Rich”.
If it is in good condition,
go to Step 8.Repair leakage of
exhaust system. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine 1A-98 Engine General Information and Diagnosis:
DTC P0137 / P0138: O2 Sensor (HO2S) Circuit Low Voltage / High Voltage (Sensor-2)S6RW0D1104034
Wiring Diagram
DTC Detecting Condition and Trouble Area8Air intake system check
1) Check air intake system for clog or leak.
Is it OK?Replace HO2S-1
referring to “Heated
Oxygen Sensor (HO2S-
1 and HO2S-2)
Removal and
Installation (If Equipped)
in Section 1C”.
If DTC still exists,
substitute a known-
good ECM and recheck.Repair or replace air
intake system. Step Action Yes No
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/WHT
WHT
11
GRN
39
E01-29
BRN
ORN
BLK/WHT
BLKC01-47
C01-11
C01-57
6
2 7
10
BLK
BLUWHT
RED/BLU
1
4
5
8
12
5V
I6RW0D110028-01
1. Main fuse box 4. Junction block assembly 7. Heater 10. To HO2S-1
2. Shield wire 5. “IG COIL” fuse 8. To HO2S-1 heater 11. Individual circuit fuse box No.1
3. Ignition switch 6. HO2S-2 9. ECM 12. “IG ACC” fuse
DTC detecting condition Trouble area
DTC P0137:
HO2S-2 voltage is lower than specified value while engine is idling after driving with
high engine load (high speed) for specified time. And HO2S-2 max. voltage minus
HO2S-2 min. voltage is less than specified value for 40 sec.
(2 driving cycle detection logic)
DTC P0138:
HO2S-2 voltage is higher than specified value while engine is idling after driving with
high engine load (high speed) for specified time. And HO2S-2 max. voltage minus
HO2S-2 min. voltage is less than specified value for 40 sec.
(2 driving cycle detection logic)•HO2S-2
• HO2S-2 circuit
• Fuel system
•ECM
• Fuel shortage
• Exhaust system
• Air intake system