engine and emission control check SUZUKI SX4 2006 1.G Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-135
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) Drive vehicle at 4000 rpm (engine speed) with 3rd gear or “3” range.
5) 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.
6) Check pending DTC and 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”.
2Vehicle 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”.For M/T model, go to
Ste p 3.
For A/T model, go to
Ste p 4.
3DTC check in ABS control module assembly
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Check ABS control module assembly for DTC.
Is there any DTC(s) in ABS control module assembly?Go to applicable DTC
diag. flow.Substitute a known-
good ECM and recheck.
4DTC check in TCM
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Check TCM for DTC.
Is DTC P0722 detected?Go to “DTC P0722:
Output Speed Sensor
(VSS) Circuit No Signal
in Section 5A”.Substitute a known-
good ECM and recheck.

Downloaded from www.Manualslib.com manuals search engine 1A-136 Engine General Information and Diagnosis:
DTC P0532: A/C Refrigerant Pressure Sensor Circuit LowS6RW0D1104051
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 using scan tool.
3) Start engine and warm up engine to normal operating temperature.
4) Run engine at idle and turn both A/C switch and heater blower switch ON (turn ON air conditioning) for 3 min. or
more.
5) Check DTC and pending 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
4
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
12
3
GRY/REDGRY/RED
ORNORN
5V
5VC01-14
E01-55
E01-54
RED/BLU
E01-31 BLK
I6RW0D110044-01
1. A/C refrigerant pressure sensor 2. To MAP sensor 3. To other sensors 4. ECM
DTC detecting condition Trouble area
A/C refrigerant pressure sensor signal voltage is less than specified
value.
(1 driving detection logic but MIL does not light up)• A/C refrigerant pressure sensor circuit
• A/C refrigerant pressure sensor
• MAP 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”.

Downloaded from www.Manualslib.com manuals search engine 1A-138 Engine General Information and Diagnosis:
DTC P0533: A/C Refrigerant Pressure Sensor Circuit HighS6RW0D1104052
Wiring Diagram
Refer to “DTC P0532: A/C Refrigerant Pressure Sensor Circuit Low”.
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.
3) Start engine and warm up engine to normal operating temperature.
4) Run engine at idle and turn both A/C switch and heater blower switch ON (turn ON air conditioning) for 3 min. or
more.
5) Check DTC and pending 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
A/C refrigerant pressure sensor signal voltage is higher than specified
value.
(1 driving detection logic but MIL does not light up)• A/C refrigerant pressure sensor circuit
• A/C refrigerant pressure sensor
• MAP 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”.
2A/C refrigerant pressure sensor power supply circuit
check
1) Disconnect connector from A/C refrigerant pressure
sensor with ignition switch turned OFF.
2) Check for proper connection of A/C refrigerant pressure
sensor at “GRY/RED”, “RED/BLU” and “ORN” wire
terminals.
3) Turn ON ignition switch, measure voltage between
engine ground and “GRY/RED” wire terminal of A/C
refrigerant pressure sensor connector.
Is voltage 4 – 6 V?Go to Step 4. Go to Step 3.
3A/C refrigerant pressure sensor power supply circuit
check
1) Disconnect connectors from MAP sensor with ignition
switch turned OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and “GRY/RED” wire terminal of A/C
refrigerant pressure sensor connector.
Is voltage 4 – 6 V?Faulty MAP sensor. “GRY/RED” wire is open
or shorted to power
circuit.
4A/C refrigerant pressure sensor signal circuit check
1) Turn ON ignition switch, measure voltage between
engine ground and “RED/BLU” wire terminal of A/C
refrigerant pressure sensor connector.
Is voltage 4 – 6 V?Go to Step 6. Go to Step 5.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-141
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.
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 P0617: Starter Relay Circuit HighS6RW0D1104055
Wiring Diagram
Refer to “DTC P0616: Starter Relay Circuit Low”.
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 at idle for 3 min. or more.
4) Check DTC and pending DTC.DTC detecting condition Trouble area
Engine starts even though vehicle is at stop and engine starter signal is low voltage.
(2 driving cycle detection logic)• Engine starter signal 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”.
2Signal circuit check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Measure voltage at terminal “C01-48” of ECM connector,
under following condition.
Voltage at terminal “C01-48” of ECM connector
While engine cranking: 6 – 14 V
After starting engine: 0 – 1 V
Is each voltage within specified range?Poor “C01-48”
connection or
intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
If wire and connections
are OK, substitute a
known-good ECM and
recheck.“YEL/GRN” wire is open
or high resistance
circuit.
DTC detecting condition Trouble area
Engine starter signal is high voltage for 180 seconds while engine is running.
(2 driving cycle detection logic)• Engine starter signal circuit
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-142 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”.

Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Starter signal check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Start engine, measure voltage between “C01-48”
terminal of ECM connector and vehicle body ground.
Is voltage 0 – 1 V?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If OK, substitute a
known-good ECM and
recheck.Go to Step 3.
3Wire circuit check
1) Disconnect starting motor control relay in individual
circuit fuse box No.1 with ignition switch turned OFF.
2) Check for proper connection to starting motor control
relay at “RED/WHT”, “RED”, “WHT”, and “YEL/GRN”
wire terminals.
3) Disconnect connector from starting motor.
4) Measure voltage between “C01-48” terminal of ECM
connector and vehicle body ground with ignition switch
turned ON.
Is voltage 0 – 1 V?Go to Step 4. “YEL/GRN” wire is
shorted to power circuit.
If wires are OK,
substitute a known-
good ECM and recheck.
4Wire circuit check
1) Measure voltage between “RED/WHT” wire terminal of
starting motor control relay connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 – 1 V?Check starting motor
control relay. If OK,
substitute a known-
good ECM and recheck.Faulty ignition switch,
check ignition switch
referring to “Ignition
Switch Inspection in
Section 9C”.
If ignition switch is OK,
check for short circuit
between ignition switch
and starting motor
control relay to power
circuit.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-143
DTC P1510: ECM Back-Up Power Supply MalfunctionS6RW0D1104056
Wiring Diagram
Circuit Description
Battery voltage is supplied so that DTC memory, values for engine control learned by ECM, etc. are kept in ECM even
when the ignition switch is turned OFF.
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 run engine at idle speed for 1 min.
3) 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
WHT/REDWHT80A50A
3
21
E01-2
I6RW0D110046-02
1. ECM 2. “DOME” fuse 3. Main fuse box
DTC detecting condition Trouble area
Back-up power circuit voltage is less than specified value for 5 seconds while engine
is running.
(1 driving cycle detection logic)Battery voltage supply circuit
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-145
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) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check 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
Monitor signal of throttle actuator output (duty output) is inconsistent with
throttle actuator control command.
(1 driving detection logic)• Throttle actuator circuit
• Electric throttle body assembly
•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”.
2Throttle actuator circuit check
1) Disconnect connectors from electric throttle body
assembly and ECM with ignition switch turned OFF.
2) Check for proper connection of electric throttle body
assembly and ECM connectors at “BLU” wire, “YEL”
wire, “C01-45” and “C01-44” terminals.
3) Turn ON ignition switch.
4) Measure voltage between “BLU” wire terminal of electric
throttle body assembly connector and engine ground,
between “YEL” wire terminal of electric throttle body
assembly connector and engine ground.
Is voltage 0 V?Go to Step 3. “BLU” wire and/or “YEL”
wire is shorted to power
circuit.
3Throttle actuator circuit check
1) Turn OFF ignition switch.
2) Measure resistance between “BLU” wire terminal of
electric throttle body assembly connector and engine
ground, between “YEL” wire terminal of electric throttle
body assembly connector and engine ground.
Is resistance infinity?Go to Step 4. “BLU” wire and/or “YEL”
wire is shorted to
ground circuit.
“WHT”
“YEL”“RED”
“GRN” “BLU”“BLK”
I5RW0C110016-01

Downloaded from www.Manualslib.com manuals search engine 1A-146 Engine General Information and Diagnosis:
DTC P2102: Throttle Actuator Control Motor Circuit LowS6RW0D1104058
Wiring Diagram
Refer to “DTC P2101: Throttle Actuator Control Motor 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 1 min. or more.
4) Check DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

4Throttle actuator circuit check
1) Check throttle actuator referring to “Throttle Actuator
Performance Check” under “Electric Throttle Body
Assembly On-Vehicle Inspection in Section 1C”.
Is check result satisfactory?Substitute a known-
good ECM and recheck.Replace electric throttle
body assembly. Step Action Yes No
DTC detecting condition Trouble area
Power supply voltage of throttle actuator control circuit is lower than specified
value for specified time even if throttle actuator control relay is turned on.
(1 driving detection logic)• Throttle actuator control relay circuit
• Throttle actuator control relay
•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”.
2Throttle actuator control relay circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Check for proper connection of ECM connector at “E01-
45” and “E01-32” terminals.
3) Turn ON ignition switch.
4) Measure voltage between “E01-32” terminal of ECM
connector and engine ground.
Is voltage 10 – 14 V?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Go to Step 3.
3Is “THR MOT” fuse in good condition?Go to Step 4. Replace fuse and check
for short in circuits
connected to this fuse.

Downloaded from www.Manualslib.com manuals search engine 1A-148 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 P2111: Throttle Actuator Control System - Stuck OpenS6RW0D1104060
Wiring Diagram
Refer to “DTC P2101: Throttle Actuator Control Motor 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) Ignition switch turned OFF for 20 sec. or more.
4) Turn ON ignition switch and check 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”.
2Throttle actuator control relay circuit check
1) Remove throttle actuator control relay from individual
circuit fuse box No.1 with ignition switch turned OFF.
2) Check for proper connection to throttle actuator control
relay at “BLK/RED”, “GRY”, “BRN” and “GRN” wire
terminals.
3) Turn ON ignition switch.
4) Measure voltage between engine ground and “E01-32”
terminal of ECM connector.
Is voltage 0 V?Go to Step 3. “GRN” wire is shorted to
other circuit.
3Throttle actuator control relay circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between engine ground and “E01-
45” terminal of ECM connector.
Is resistance infinity?Go to Step 4. “BRN” wire is shorted to
ground circuit.
4Throttle actuator control relay check
1) Check throttle actuator control relay referring to “Main
Relay, Fuel Pump Relay, Starting Motor Control Relay,
Throttle Actuator Control Relay and Radiator Cooling
Fan Relay Inspection in Section 1C”.
Is it in good condition?Substitute a known-
good ECM and recheck.Replace throttle
actuator control relay.
DTC detecting condition Trouble area
Throttle position does not change by specified value during diagnosing throttle
valve at ignition switch turned OFF.
(1 driving detection logic)• Electric throttle body assembly
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-149
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

DTC P2119: Throttle Actuator Control Throttle Body Range / PerformanceS6RW0D1104061
Wiring Diagram
Refer to “DTC P2101: Throttle Actuator Control Motor 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) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check 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”.
2Throttle valve visual check
1) Check that there isn’t any foreign matter caught between
throttle valve and throttle body housing referring to
“Throttle Valve Visual Check” under “Electric Throttle
Body Assembly On-Vehicle Inspection in Section 1C”.
Is it in good condition?Go to Step 3. Take it out after
removing throttle body
and clean inside of
throttle body thoroughly.
3Throttle valve operation check
1) Check operation of throttle valve referring to “Throttle
Valve Operation Check” under “Electric Throttle Body
Assembly On-Vehicle Inspection in Section 1C”.
Is check result satisfactory?Go to Step 4. Replace electric throttle
body assembly.
4Throttle actuator operation check
1) Check operation of throttle actuator referring to “Throttle
Actuator Operation Check” under “Electric Throttle Body
Assembly On-Vehicle Inspection in Section 1C”.
Is check result satisfactory?Go to Step 5. Replace electric throttle
body assembly.
5Throttle position sensor performance check
1) Check performance of throttle position sensor referring
to “Throttle Position Sensor Performance Check” under
“Electric Throttle Body Assembly On-Vehicle Inspection
in Section 1C”.
Is check result satisfactory?Substitute a known-
good ECM and recheck.Replace electric throttle
body assembly.
DTC detecting condition Trouble area
Difference between the measured (actual) throttle valve opening angle and the
target throttle valve opening angle which is calculated based on accelerator pedal
opening angle and engine condition is more than specification for specified time.
(1 driving detection logic)• Throttle actuator circuit
• Electric throttle body assembly
•ECM