2006 SUZUKI SX4 Can

Downloaded from www.Manualslib.com manuals search engine 1A-112 Engine General Information and Diagnosis:
DTC P0327 / P0328: Knock Sensor Circuit Low / HighS6RW0D1104040
Wiring Diagram
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, pending DTC and freeze frame data by using scan tool.
3) Start engine and run it for 10 sec.
4) Check DTC by using scan tool.11Engine mechanical system check
1) Check engine mechanical parts or system which can
cause engine rough idle or poor performance.
• Engine compression (Refer to “Compression Check in
Section 1D”.)
• Valve lash (Refer to “Valve Lash (Clearance)
Inspection in Section 1D”.)
• Valve timing (Refer to “Timing Chain and Chain
Tensioner Removal and Installation in Section 1D”.)
Are they in good condition?Check wire harness and
connection of ECM
ground, ignition system
and fuel injector for
intermittent open and
short.Repair or replace
defective part. 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
12
REDC01-56
5 V
I6RW0D110030-01
1. Knock sensor 2. ECM
DTC detecting condition Trouble area
DTC P0327:
Voltage of knock sensor is lower than specified value with engine
running.
(1 driving cycle detection logic)
DTC P0328:
Voltage of knock sensor is higher than specified value with
engine running.
(1 driving cycle detection logic)• Knock sensor circuit (open or short)
• Knock sensor
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-115
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Crank engine for 3 – 5 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”.
2CKP sensor and connector for proper installation check
Is CKP sensor installed properly and connector connected
securely?Go to Step 3. Correct.
3Wire harness and connection check
1) Disconnect connector from CKP sensor with ignition
switch turned OFF.
2) Check for proper connection to CKP sensor at “BLK/
RED”, “PNK” and “BLK/ORN” wire terminals.
3) If OK, turn ON ignition switch and check voltage at “BLK/
RED”, “PNK” and “BLK/ORN” wire terminals of
disconnected CKP sensor connector.
CKP sensor voltage
Terminal “B+”: 10 – 14 V
Terminal “Vout”: 4 – 5 V
Terminal “GND”: 0 V
Is check result satisfactory?Go to Step 7. Go to Step 4.
4Was terminal “Vout” voltage in Step 3 within specification?Go to Step 5. “PNK” wire is open or
shorted to ground /
power supply circuit.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
I2RH0B110048-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-117
System Description
The CMP sensor located on the transmission side of cylinder head (VVT model) or timing chain cover (non-VVT
model) consists of the signal generator (magnetic sensor) and signal rotor (intake camshaft portion (VVT model) or
exhaust camshaft timing sprocket (non-VVT model)).
The signal generator generates reference signal through slits in the slit plate which turns together with the camshaft.
Reference signal
The CMP sensor generates 6 pulses of signals each of which has a different waveform length while the camshaft
makes one full rotation. Refer to “Inspection of ECM and Its Circuits”.
Based on these signals, ECM judges which cylinder piston is in the compression stroke and the engine speed.
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) Crank engine for 5 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”.

DTC detecting condition Trouble area
• CMP sensor pulse is less than 20 pulses per crankshaft 8 revolutions
or
• CMP sensor pulse is more than 28 pulses per crankshaft 8
revolutions
or
• CMP sensor pulse is less than 20 pulses between BTDC 75° CA and
BTDC 5° CA with crankshaft 8 revolutions from engine start.
(1 driving cycle detection logic)• CMP sensor circuit open or short
• Signal rotor teeth damaged
• CMP sensor malfunction, foreign material
being attached or improper installation
•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”.
2CMP sensor and connector for proper installation check
Is CMP sensor installed properly and connector connected
securely?Go to Step 3. Correct.

Downloaded from www.Manualslib.com manuals search engine 1A-120 Engine General Information and Diagnosis:
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 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) 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 for 10 min.
5) Drive vehicle and increase engine speed 3000 rpm in 3rd gear or “3” range.
6) Release accelerator pedal and with engine brake applied, keep vehicle coasting for 5 sec. or more. (Keep fuel cut
condition for 5 sec. or more) If fuel cut condition is not kept for 5 sec. or more, coast down a slope in engine speed
1000 – 3000 rpm for 5 sec. or more.
7) Stop vehicle and run engine at idle.
8) For european market model, check whether EGR system readiness/monitoring test has completed or not by using
scan tool.
If evaporative system readiness/monitoring test has not completed, check vehicle conditions (environmental) and
repeat Steps 3) through 7).
9) Check DTC and pending DTC.DTC detecting condition Trouble area
DTC P0401:
Difference in intake manifold absolute pressure between opened EGR valve and closed
EGR valve is smaller than specified value.
(2 driving cycle detection logic, monitoring once / 1 driving)
DTC P0402:
Difference in intake manifold absolute pressure between opened EGR valve and closed
EGR valve is larger than specified value.
(2 driving cycle detection logic, monitoring once / 1 driving)• EGR valve
• EGR passage
• MAP sensor
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-121
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”.
2Do you have SUZUKI scan tool?Go to Step 3. Go to Step 5.
3EGR valve operation check
1) With ignition switch turned OFF, install SUZUKI scan tool
to DTC.
2) Check EGR system referring to “EGR System Inspection
(If Equipped) in Section 1B”.
Is it in good condition?Go to Step 4. Go to Step 5.
4MAP sensor check
1) Check MAP sensor for performance referring to
“Manifold Absolute Pressure (MAP) Sensor Inspection
(If Equipped) 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.
5EGR 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).
6EGR valve check
1) Check EGR valve referring to “EGR Valve Inspection (If
Equipped) in Section 1B”.
Is check result satisfactory?Go to Step 7. Faulty EGR valve.
7MAP sensor check
1) Check MAP sensor for performance referring to
“Manifold Absolute Pressure (MAP) Sensor Inspection
(If Equipped) in Section 1C”.
Is check result satisfactory?EGR passage clogged.
If OK, substitute a
known-good ECM and
recheck.Replace MAP sensor.

Downloaded from www.Manualslib.com manuals search engine 1A-122 Engine General Information and Diagnosis:
DTC P0403: Exhaust Gas Recirculation Control CircuitS6RW0D1104044
Wiring Diagram
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 warm it up to normal operating temperature.
4) Drive vehicle in 2000 – 3500 rpm of engine speed.
5) Keep above vehicle speed for 1 min. (Throttle valve opening is kept constant in this step.)
6) Stop vehicle and 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
BLK/WHT
BLK/RED
BLK/RED
WHTBLK/YELBLK/YEL
BLK/YEL
GRN
BRN/WHT
12V5V
4
1 65E01-29
E01-1
E01-60
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
E01-16 2BLK/RED
C01-4
C01-3
C01-19
C01-18
BLK/RED
BLK/RED
BLK/RED
GRN/RED
GRN/ORN
WHT/RED
BRN/YEL
37 8
E01-31 BLK
I6RW0D110037-01
1. Main relay 3. Main fuse box 5. ECM 7. “FI” fuse
2. EGR valve 4. Ignition switch6. “IG COIL” fuse 8. “IGN” fuse
DTC detecting condition Trouble area
EGR valve output voltage is different 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-125
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 are satisfied when using this “DTC Confirmation
Procedure”.
• Intake air temperature at engine start: –10 (14 °F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine coolant temp.: 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 turned OFF.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Increase vehicle speed to 40 – 50 mph, 60 – 80 km/h.
4) Keep above vehicle speed for 10 min. or more (Throttle valve opening is kept constant in this step).
5) Stop vehicle.
6) For european market model, check whether catalyst monitoring readiness/monitoring test has completed or not by
using scan tool.
If evaporative system readiness/monitoring test has not completed, check vehicle conditions (environmental) and
repeat Steps 3) through 5).
7) 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”.
2Exhaust system visual check
1) Check exhaust system for leaks, damage and loose
connection.
Is it in good condition?Go to Step 3. Repair or replace
defective part.
3HO2S-2 output voltage check
1) Check output voltage of HO2S-2 referring to “DTC
P0137 / P0138: O2 Sensor (HO2S) Circuit Low Voltage /
High Voltage (Sensor-2)”.
Is check result satisfactory?Replace exhaust
manifold (built in warm
up three way catalytic
converter) and exhaust
center pipe (built in
three way catalytic
converter).Check “BRN” and / or
“ORN” wires for open
and short, and
connections for poor
connection.
If wires and connections
are OK, replace HO2S-
2.

Downloaded from www.Manualslib.com manuals search engine 1A-126 Engine General Information and Diagnosis:
DTC P0443: Evaporative Emission System Purge Control Valve CircuitS6RW0D1104046
Wiring Diagram
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 OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up normal operating temperature.
4) Drive vehicle at more than 40 km/h, 25 mph for 5 min. or more.
5) 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
BLK/WHT
BLK/RED
BLK/RED
WHTBLK/YELBLK/YEL
BLK/YEL
GRN
BRN/WHT
12V5V
5
42 36E01-29
E01-1
E01-60
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
7 8
BLK/REDBLK/REDE01-16
1
C01-29 BLU/BLK
BLKE01-31
I6RW0D110039-01
1. EVAP canister purge valve 3. “IG COIL” fuse 5. Ignition switch 7. “FI” fuse
2. Main relay 4. Main fuse box 6. ECM 8. “IGN” fuse
DTC detecting condition Trouble area
Monitor signal of EVAP canister purge valve is different from command signal.
(Circuit open or short)
(2 driving cycle detection logic)• EVAP canister purge valve
• EVAP canister purge valve circuit
•ECM