temperature sensor SUZUKI SX4 2006 1.G Service Owner's Manual

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4MAF sensor output voltage check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Measure voltage between “C01-26” and “C01-27”
terminals of ECM connector referring to “Mass Air Flow
(MAF) and Intake Air Temperature (IAT) Sensor On-
Vehicle Inspection in Section 1C”.
Is each value within specified range?Poor “C01-26” and/or
“C01-27” terminal
connection.
If OK, substitute a
known-good ECM and
recheck.Go to Step 5.
5MAF sensor power supply voltage check
1) Disconnect connector from MAF and IAT sensor with
ignition switch turned OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and “BLK/RED” wire terminal (2) of MAF
and IAT sensor connector (1).
Is voltage 10 – 14 V?Go to Step 6. “BLK/RED” wire is open
circuit.
6MAF sensor ground circuit check
1) Turn OFF ignition switch, measure resistance between
“GRY” wire terminal of MAF and IAT sensor connector
and engine ground.
Is resistance below 5
Ω?Go to Step 8. Go to Step 7.
7Ground circuit check
1) Measure resistance between “C01-27” terminal of ECM
connector and vehicle body ground.
Is resistance below 5
Ω?“GRY” wire is open or
high resistance circuit.ECM grounds “C01-58”,
“C01-15”, “C01-30” and/
or “E01-31” circuit is
open or high resistance.
If wires are OK,
substitute a known-
good ECM and recheck.
8MAF sensor signal circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Turn ON ignition switch, measure voltage between
“GRN/BLK” wire terminal of MAF and IAT sensor
connector and engine ground.
Is voltage 0 V?Go to Step 9. “GRN/BLK” wire is
shorted to others circuit.
9MAF sensor signal circuit check
1) Turn OFF ignition switch, measure resistance between
“GRN/BLK” wire terminal of MAF and IAT sensor
connector and engine ground.
Is resistance infinity?Go to Step 10. “GRN/BLK” wire is
shorted to ground
circuit. Step Action Yes No
I4RS0A110020-01

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DTC P0103: Mass Air Flow Circuit High InputS6RW0D1104019
Wiring Diagram
Refer to “DTC P0101: Mass Air Flow Circuit Range / Performance”.
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.4MAF sensor ground circuit check
1) Turn OFF ignition switch, measure resistance between
“GRY” wire terminal of MAF and IAT sensor connector
and engine ground.
Is resistance below 5
Ω?Go to Step 6. Go to Step 5.
5Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between “C01-27” terminal of ECM
connector and engine ground.
Is resistance below 5
Ω?“GRY” wire is open or
high resistance circuit.ECM grounds “C01-58”,
“C01-15”, “C01-30” and/
or “E01-31” circuit is
open or high resistance.
If wires are OK,
substitute a known-
good ECM and recheck.
6MAF sensor signal circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure voltage between “GRN/BLK” wire terminal of
MAF and IAT sensor connector and engine ground with
ignition switch turned ON.
Is voltage 0 V?Go to Step 7. “GRN/BLK” wire is
shorted to other circuit.
7MAF sensor signal circuit check
1) Measure resistance between “GRN/BLK” wire terminal
of MAF and IAT sensor connector and engine ground
with ignition switch turned OFF.
Is resistance infinity?Go to Step 8. “GRN/BLK” wire is
shorted to ground
circuit.
8MAF sensor signal circuit check
1) Measure resistance between “GRN/BLK” wire terminal
of MAF and IAT sensor connector and “C01-26” terminal
of ECM connector.
Is resistance below 3
Ω?Go to Step 9. “GRN/BLK” wire is open
or high resistance
circuit.
9MAF sensor output signal check
1) Connect connectors to MAF and IAT sensor and ECM
with ignition switch turned OFF.
2) Measure voltage between “C01-26” and “C01-27”
terminals of ECM connector referring to “Mass Air Flow
(MAF) and Intake Air Temperature (IAT) Sensor On-
Vehicle Inspection in Section 1C”.
Is each value within specified range?Substitute a known-
good ECM and recheck.Faulty MAF and IAT
sensor. Step Action Yes No
DTC detecting condition Trouble area
Voltage of MAF sensor output is more than specified value for specified time
with engine running.
(1 driving cycle detection logic)• Open or short in MAF sensor circuit
• MAF sensor
•ECM

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3) Start engine and run it for 10 sec.
4) 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”.
2MAF sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Start engine and check MAF value displayed on scan
tool. (Refer to “Scan Tool Data” for normal value.)
Is normal value indicated?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Go to Step 3.
3MAF sensor power supply voltage check
1) Disconnect connector from MAF and IAT sensor with
ignition switch tuned OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and “BLK/RED” wire terminal of MAF and
IAT sensor connector.
Is voltage 10 – 14 V?Go to Step 4. “BLK/RED” wire is open
circuit.
4MAF sensor ground circuit check
1) Turn OFF ignition switch, measure resistance between
“GRY” wire terminal of MAF and IAT sensor connector
and engine ground.
Is resistance below 5
Ω?Go to Step 6. Go to Step 5.
5Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between “C01-27” terminal of ECM
connector and engine ground.
Is resistance below 5
Ω?“GRY” wire is open or
high resistance circuit.ECM grounds “C01-58”,
“C01-15”, “C01-30” and/
or “E01-31” circuit are
open or high resistance.
If wires are OK,
substitute a known-
good ECM and recheck.
6MAF sensor signal circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure voltage between “GRY/BLK” wire terminal of
MAF and IAT sensor connector and engine ground.
Is voltage 0 V?Go to Step 7. “GRY/BLK” wire is
shorted to other circuit.
7MAF sensor output signal check
1) Connect connector to MAF and IAT sensor and ECM
with ignition switch turned OFF.
2) Measure voltage between “C01-26” and “C01-27”
terminal of ECM connector referring to “Mass Air Flow
(MAF) and Intake Air Temperature (IAT) Sensor On-
Vehicle Inspection in Section 1C”.
Is each value within specified range?Substitute a known-
good ECM and recheck.Faulty MAF and IAT
sensor.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-69
DTC P0106: Manifold Absolute Pressure Range / PerformanceS6RW0D1104020
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
NOTE
Check to make sure that the 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)
• Engine coolant temperature: 70 °C (158 °F) or more
• Altitude (barometric pressure): 2500 m, 8200 ft or less (560 mmHg, 74.4 kPa or more)

1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC using scan tool and warm up engine completely.
3) Run engine at idle speed for 1 min.
4) Check DTC and pending DTC.
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
4
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
12
3
GRY/REDGRY/RED
5V
5VC01-14
C01-53
C01-55
RED/BLK
GRY/BLUGRY/BLU
E01-31BLK
I6RW0D110023-01
1. Manifold absolute pressure sensor 3. To other sensors
2. To A/C refrigerant pressure sensor (if equipped with A/C) 4. ECM
DTC detecting condition Trouble area
• Difference between Max. manifold absolute pressure
value and Min. manifold pressure value is less than
specified value when engine running at idle speed.
• Difference between barometric pressure value and
manifold pressure value is less than specified value for 5
sec. at 2000 r/min. or more with acceleration pedal off
condition.
(2 driving cycle detection logic)• Manifold absolute pressure sensor
• Manifold absolute pressure sensor vacuum passage
• Air intake system
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-74 Engine General Information and Diagnosis:
DTC P0111: Intake Air Temperature Circuit Range / PerformanceS6RW0D1104023
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
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)
• Engine coolant temperature at engine start: less than 30 °C (86 °F)
• Engine coolant temperature: 70 °C (158 °F) or more
• 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 using scan tool.
3) Start engine and warm up to normal operating temperature. (ECT approx. 90 – 95 °C, 194 – 203 °F)
4) Run engine at idle speed for 10 min. or more.9MAP sensor output signal check
1) Check MAP sensor according to “Manifold Absolute
Pressure (MAP) Sensor Inspection (If Equipped) in
Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Faulty MAP sensor. 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
5V
2
BLK/YEL
GRY/BLU
GRY
GRY/BLU
1
GRN/BLK
C01-25
C01-55 34
C01-26
C01-27
BLK/RED
GRY/BLU
I6RW0D110024-01
1. MAF and IAT sensor 3. To other sensors
2. ECM 4. From main relay
DTC detecting condition Trouble area
Difference of maximum IAT minus minimum IAT is less than specified value while
ECT is over 70 °C (158 °F) after 10 min from cold engine start (ECT is lower than
30°C (86 °F) at engine start).
(2 driving cycle detection logic)• High resistance circuit
• MAF and IAT sensor
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-76 Engine General Information and Diagnosis:
DTC P0112: Intake Air Temperature Sensor Circuit LowS6RW0D1104024
Wiring Diagram
Refer to “DTC P0111: Intake Air Temperature Circuit Range / Performance”.
DTC Detecting Condition and Trouble Area5Wire circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “BLK/YEL” wire terminal of
MAF and IAT sensor connector and vehicle body
ground.
Is resistance infinity?Go to Step 6. “BLK/YEL” wire is
shorted to ground or
other circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
6Wire circuit check
1) Turn ignition switch to ON position.
2) Measure voltage between “BLK/YEL” wire terminal of
MAF and IAT sensor connector and vehicle body
ground.
Is voltage about 0 V?Go to Step 7. “BLK/YEL” wire shorted
to other circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
7Wire circuit check
1) Measure resistance between “C01-25” terminal of ECM
connector and “BLK/YEL” wire terminal of MAF and IAT
sensor connector with ignition switch turned OFF.
Is resistance below 3
Ω?Go to Step 8. “BLK/YEL” wire is high
resistance circuit.
8Ground circuit check
1) Connect connectors to ECM.
2) Check for proper connection of MAF and IAT sensor
connector at “GRY/BLU” wire terminal.
3) Measure resistance between “GRY/BLU” wire terminal
of MAF and IAT sensor connector and vehicle body
ground with ignition switch turned OFF.
Is resistance below 5
Ω?Go to Step 10. Go to Step 9.
9Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between “C01-55” terminal of ECM
connector and vehicle body ground.
Is resistance below 3
Ω?“GRY/BLU” wire is open
or high resistance
circuit.
Poor “C01-55”
connection.Faulty ECM ground
circuit.
If circuit is OK,
substitute a known-
good ECM and recheck.
10IAT sensor check
1) Check IAT sensor according to “Intake Air Temperature
(IAT) Sensor Inspection in Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Replace MAF and IAT
sensor. Step Action Yes No
DTC detecting condition Trouble area
Voltage of IAT sensor output is less than specified value with engine running.
(High intake air temperature (low voltage / low resistance))
(1 driving cycle detection logic)• IAT sensor circuit
• IAT sensor
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-78 Engine General Information and Diagnosis:
DTC P0113: Intake Air Temperature Sensor Circuit HighS6RW0D1104025
Wiring Diagram
Refer to “DTC P0111: Intake Air Temperature Circuit Range / Performance”.
DTC Detecting Condition and Trouble Area
NOTE
When DTC P0108 and P0118 are indicated together, it is possible that “GRY/BLU” wire circuit is open.

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 run it for 10 sec.
4) 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”.

5IAT short circuit check
1) Turn ON ignition switch.
2) Measure voltage between “BLK/YEL” wire terminal of
MAF and IAT sensor connector and vehicle body
ground.
Is voltage about 0 V?Go to Step 6. “BLK/YEL” wire is
shorted to other circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
6IAT sensor for performance check
1) Check IAT sensor according to “Intake Air Temperature
(IAT) Sensor Inspection in Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Replace MAF and IAT
sensor. Step Action Yes No
DTC detecting condition Trouble area
Voltage of IAT sensor output is more than specified value with engine running.
(Low intake air temperature (high voltage / high resistance))
(1 driving cycle detection logic)• IAT sensor circuit
• IAT sensor
•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”.
2IAT sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check intake air temp. displayed on scan tool.
Is –40
°C (–40 °F) indicated?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 1A-80 Engine General Information and Diagnosis:
DTC P0116: Engine Coolant Temperature Circuit Range / PerformanceS6RW0D1104026
Wiring Diagram
DTC Detecting Condition and Trouble Area8Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between “C01-55” terminal of ECM
connector and vehicle body ground.
Is resistance below 5
Ω?“GRY/BLU” wire is open
circuit or high resistance
circuit. Poor “C01-55”
connection.Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.
9IAT sensor for performance check
1) Check IAT sensor according to “Intake Air Temperature
(IAT) Sensor Inspection in Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Replace MAF and IAT
sensor. Step Action Yes No
C01-55GRY/BLUGRY/BLU
3 1
2 5V
C01-24LT GRN
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
I6RW0D110025-01
1. ECT sensor 2. ECM 3. To other sensors
DTC detecting condition Trouble area
ECT sensor values is less than temperature at A/F feedback start while engine is running
under more than specified engine load (more than 1000 rpm) for specified time
(depending on ECT at engine start (ex. 5 min at –10 °C, –4 °F)) continuously from engine
start.
(2 driving cycle detecting logic)•ECT sensor
• ECT sensor circuit
• Thermostat
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-83
DTC P0117: Engine Coolant Temperature Circuit LowS6RW0D1104027
Wiring Diagram
Refer to “DTC P0116: Engine Coolant Temperature Circuit Range / Performance”.
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 run it for 10 sec. or more.
4) 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”.

10Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between “C01-55” terminal of ECM
connector and vehicle body ground.
Is resistance below 5
Ω?“GRY/BLU” wire is high
resistance circuit.
Poor “C01-55”
connection.Faulty ECM ground
circuit.
If circuit is OK,
substitute a known-
good ECM and recheck.
11ECT sensor check
1) Check ECT sensor according to “Engine Coolant
Temperature (ECT) Sensor Inspection in Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Replace ECT sensor. Step Action Yes No
DTC detecting condition Trouble area
Voltage of ECT sensor output is less than specified value with engine running.
(High engine coolant temperature (low voltage / low resistance))
(1 driving cycle detection logic)• ECT sensor circuit
•ECT sensor
•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”.
2ECT sensor and its circuit check
1) Connect scan tool with ignition switch turned OFF.
2) Turn ON ignition switch.
3) Check engine coolant temp. displayed on scan tool.
Is 119
°C (246 °F) indicated?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 1A-84 Engine General Information and Diagnosis:
3ECM voltage check
1) Disconnect connector from ECT sensor with ignition
switch turned OFF.
2) Check for proper connection to ECT sensor at “LT GRN”
and “GRY/BLU” wire terminals.
3) If OK, then turn ON ignition switch, measure voltage
between “LT GRN” wire terminal of ECT sensor
connector and vehicle body ground.
Is voltage about 4 – 6 V?Go to Step 6. Go to Step 4.
4ECT sensor short circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “LT GRN” wire terminal of
ECT sensor connector and vehicle body ground.
Is resistance infinity?Go to Step 5. “LT GRN” wire is
shorted to ground
circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
5ECT sensor short circuit check
1) Turn ON ignition switch.
2) Measure voltage between “LT GRN” wire terminal of
ECT sensor connector and vehicle body ground.
Is voltage about 0 V?Go to Step 6. “LT GRN” wire is
shorted to other circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
6ECT sensor for performance check
1) Check ECT sensor according to “Engine Coolant
Temperature (ECT) Sensor Inspection in Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Replace ECT sensor. Step Action Yes No
I5RW0A110025-01