2006 SUZUKI SX4 Ecm diagram

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 Engine General Information and Diagnosis: 1A-63
DTC P0101: Mass Air Flow Circuit Range / PerformanceS6RW0D1104017
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
BLK/RED
BLK/RED
WHTBLK/YELBLK/YEL
BLK/YEL
GRN
BRN/WHT
12V5V
5V
2
34E01-29
E01-1
E01-60
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
BLK/REDE01-16
BLK/YEL
GRY/BLU
1BLK/RED
C01-25
C01-55 5
E01-31 BLK
GRY/BLU
GRY
GRN/BLKC01-26
C01-27
I6RW0D110022-02
1. MAF and IAT sensor 3. Main relay 5. To other sensors
2. Ignition switch 4. ECM
DTC detecting condition Trouble area
• MAF volume is greater than specified value after warming up engine with
idling condition.
• MAF volume is lower than specified value at high speed condition.
(2 driving cycle detection logic)• Air intake system (clog or leakage)
• MAF sensor circuit
• MAF sensor
• TP sensor and/or its circuit
• MAP sensor and/or its circuit
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-66 Engine General Information and Diagnosis:
DTC P0102: Mass Air Flow Circuit Low InputS6RW0D1104018
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.
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”.

10MAF 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?Faulty MAF and IAT
sensor.“GRN/BLK” wire is open
or high resistance
circuit.
11Is DTC P0106 displayed?Go to “DTC P0106:
Manifold Absolute
Pressure Range /
Performance”.Substitute a known-
good ECM and recheck. Step Action Yes No
DTC detecting condition Trouble area
Voltage of MAF sensor output is less than specified value for specified time
with engine running.
(1 driving cycle detection logic)• Open or short in MAF sensor circuit
• MAF 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”.
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 turned 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.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-67
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

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-70 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

DTC P0107: Manifold Absolute Pressure Circuit Low InputS6RW0D1104021
Wiring Diagram
Refer to “DTC P0106: Manifold Absolute Pressure Range / Performance”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned 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. Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2MAP sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check DTC.
Is there DTC P0107 or DTC P0108?Go to applicable DTC
diag. flow.Go to Step 3.
3MAP 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?Go to Step 4. Faulty MAP sensor.
4MAP sensor circuit check
1) Check MAP sensor circuit referring to Step 3 to 6 of
“DTC P0107: Manifold Absolute Pressure Circuit Low
Input” or Step 3 to 8 of “DTC P0108: Manifold Absolute
Pressure Circuit High Input”.
Is circuit in good condition?Go to Step 5. Repair or replace.
5Air intake system check
1) Check air intake system for clog or leak.
Is it in good condition?Substitute a known-
good ECM and recheck.Repair or replace.
DTC detecting condition Trouble area
Manifold absolute pressure sensor output voltage is lower
than specified value for specified time.
(1 driving cycle detection logic)• Manifold absolute pressure sensor circuit
• Manifold absolute pressure sensor
• A/C refrigerant pressure sensor (if equipped with A/C)
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-72 Engine General Information and Diagnosis:
DTC P0108: Manifold Absolute Pressure Circuit High InputS6RW0D1104022
Wiring Diagram
Refer to “DTC P0106: Manifold Absolute Pressure Range / Performance”.
DTC Detecting Condition and Trouble Area
NOTE
When DTC P0113 and P0118 are indicated together, it is possible that “GRY/BLU” wire circuit is open.

DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned 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.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

7MAP 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
DTC detecting condition Trouble area
Manifold absolute pressure sensor output voltage is higher
than specified value for specified time.
(1 driving cycle detection logic)• Manifold absolute pressure sensor circuit
• Manifold absolute pressure sensor
• A/C refrigerant pressure sensor (if equipped with A/C)
•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”.
2MAP sensor and its circuit check
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ignition switch ON.
3) Check intake manifold pressure displayed on scan tool.
Is it 127 kPa (37.5 in.Hg)?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-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