2006 SUZUKI SX4 check engine

Downloaded from www.Manualslib.com manuals search engine 1A-150 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”.
2Electric throttle body assembly system check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch, check each voltage of “TP
Sensor 1 Volt” and “TP Sensor 2 Volt” displayed on scan
tool when accelerator pedal is idle position and fully
depressed.
Is displayed each TP sensor value as described voltage in
“Scan Tool Data”?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.Go to Step 3.
3Throttle actuator circuit check
1) Disconnect connector from electric throttle body
assembly with ignition switch turned OFF.
2) Check for proper connection to electric throttle body
assembly at “BLU” and “YEL” wire terminals.
3) Disconnect connectors from ECM.
4) Check for proper connection to ECM at “C01-45” and
“C01-44” terminals.
5) Measure resistance at following connector terminals.
• Between “BLU” wire terminal of electric throttle body
assembly connector and “C01-45” terminal of ECM
connector
• Between “YEL” wire terminal of electric throttle body
assembly connector and “C01-44” terminal of ECM
connector
Is each resistance below 5
Ω?Go to Step 4. “BLU” wire and/or “YEL”
wire is open or high
resistance.
4Electric throttle body assembly check
1) Check electric throttle body assembly referring to
“Electric Throttle Body Assembly and Its Circuit 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.
“WHT”
“YEL”“RED”
“GRN” “BLU”“BLK”
I5RW0C110016-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-151
DTC P2122: Pedal Position Sensor (Main) Circuit Low InputS6RW0D1104062
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) 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.
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
BRN
GRN
BLU
RED
YEL
WHT
E01-35
E01-37
E01-52
E01-34
E01-36
E01-51
E01-505 V
5 V 1
1-132
1-2
BLK
I6RW0D110048-01
1. APP sensor assembly 1-2. APP sensor (sub) 3. Ground of APP sensor for shield wire
1-1. APP sensor (main) 2. ECM
DTC detecting condition Trouble area
Output voltage of APP sensor (main) is lower than specified value.
(1 driving detection logic)• APP sensor (main) circuit
• APP sensor assembly
•ECM
• Incorrect mounting of APP sensor assembly

Downloaded from www.Manualslib.com manuals search engine 1A-152 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”.
2APP sensor assembly mounting check
1) Check that APP sensor assembly has been mounted to
vehicle body properly (no pinched floor carpet, etc.).
Is it OK?Go to Step 3. Reinstall APP sensor
assembly properly
referring to “Accelerator
Pedal Position (APP)
Sensor Assembly
Removal and
Installation in Section
1C”.
3APP sensor (main) and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch, check “APP Sensor 1 Volt”
displayed on scan tool.
Is displayed voltage below 0.167 V?Go to Step 4. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
4ECM voltage check
1) Disconnect connector from APP sensor assembly with
ignition switch turned OFF.
2) Check for proper connection to APP sensor assembly at
“BRN”, “GRN” and “BLU” wire terminals.
3) If OK, measure voltage between “BRN” wire terminal of
APP sensor assembly connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?Go to Step 7. Go to Step 5.
5ECM voltage check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Check for proper connection of ECM connector at “E01-
35” terminal.
4) If OK, measure voltage between “E01-35” terminal of
ECM connector and engine ground with ignition switch
turned ON.
Is voltage 4 – 6 V?“BRN” wire is open or
high resistance circuit.Go to Step 6.
"GRN" "BLU" "BRN"
"YEL"
"WHT"
"RED"
I4RS0B110048-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-153
DTC P2123: Pedal Position Sensor (Main) Circuit High InputS6RW0D1104063
Wiring Diagram
Refer to “DTC P2122: Pedal Position Sensor (Main) Circuit Low Input”.
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.6Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “E01-35” terminal of ECM
connector and engine ground.
Is resistance infinity?Substitute a known-
good ECM and recheck.“BRN” wire is shorted to
ground circuit.
7Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E01-
37”, “E01-52” and “E01-51” terminals.
3) If OK, measure resistance between “GRN” wire terminal
of APP sensor assembly connector and vehicle body
ground.
Is resistance infinity?Go to Step 8. “GRN” wire is shorted to
ground circuit.
8Wire harness check
1) Measure resistance between “E01-37” and each “E01-
52”, “E01-51”, “E01-50” terminals of ECM connector with
ignition switch turned OFF.
Is each resistance infinity?Go to Step 9. “GRN” wire is shorted to
“BLU” wire and/or
“WHT” wire and/or
“E01-50” circuit.
9Wire harness check
1) Measure resistance between “GRN” wire terminal of
APP sensor assembly connector and “E01-37” terminal
of ECM connector with ignition switch turned OFF.
Is resistance below 5
Ω?Go to Step 10. “GRN” wire is open or
high resistance circuit.
10APP sensor assembly check
1) Check APP sensor (main) referring to “Accelerator Pedal
Position (APP) Sensor Assembly Inspection in Section
1C”.
Is output voltage within specified value?Substitute a known-
good ECM and recheck.Replace APP sensor
assembly. Step Action Yes No
DTC detecting condition Trouble area
Output voltage of APP sensor (main) is higher than specified value.
(1 driving detection logic)• APP sensor (main) circuit
• APP sensor assembly
•ECM
• Incorrect mounting of APP sensor assembly

Downloaded from www.Manualslib.com manuals search engine 1A-154 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”.
2APP sensor assembly mounting check
1) Check that APP sensor assembly has been mounted to
vehicle body properly (no pinched floor carpet, etc.).
Is it OK?Go to Step 3. Reinstall APP sensor
assembly properly
referring to “Accelerator
Pedal Position (APP)
Sensor Assembly
Removal and
Installation in Section
1C”.
3APP sensor (main) and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch, check “APP Sensor 1 Volt”
displayed on scan tool.
Is displayed voltage 4.76 V or more?Go to Step 4. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
4ECM voltage check
1) Disconnect connector from APP sensor assembly with
ignition switch turned OFF.
2) Check for proper connection to APP sensor assembly at
“BRN”, “GRN” and “BLU” wire terminals.
3) If OK, measure voltage between “BRN” wire terminal of
APP sensor assembly connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?Go to Step 6. Go to Step 5.
5Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E01-
35” terminal.
3) If OK, measure voltage between “E01-35” terminal of
ECM connector and engine ground with ignition switch
turned ON.
Is voltage 0 V?Substitute a known-
good ECM and recheck.“BRN” wire is shorted to
power circuit.
"GRN" "BLU" "BRN"
"YEL"
"WHT"
"RED"
I4RS0B110048-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-155
DTC P2127: Pedal Position Sensor (Sub) Circuit Low InputS6RW0D1104064
Wiring Diagram
Refer to “DTC P2122: Pedal Position Sensor (Main) Circuit Low Input”.
DTC Detecting Condition and Trouble Area6Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E01-
35”, “E01-37” and “E01-34” terminals.
3) If OK, measure resistance between “GRN” wire terminal
and each “BRN”, “RED” wire terminals of APP sensor
assembly connector.
Is each resistance infinity?Go to Step 7. “GRN” wire is shorted to
“BRN” wire and/or
“RED” wire.
7Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between “E01-37” terminal of ECM
connector and engine ground.
Is voltage 0 V?Go to Step 8. “GRN” wire is shorted to
power circuit.
8Ground circuit check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Measure resistance between “BLU” wire terminal of APP
sensor assembly connector and vehicle body ground.
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) Check for proper connection of ECM connector at “E01-
52” terminal.
3) If OK, measure resistance between “E01-52” terminal of
ECM connector and engine ground.
Is resistance below 5
Ω?“BLU” wire is open or
high resistance circuit.Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.
10APP sensor assembly check
1) Check APP sensor (main) referring to “Accelerator Pedal
Position (APP) Sensor Assembly Inspection in Section
1C”.
Is output voltage within specified value?Substitute a known-
good ECM and recheck.Replace APP sensor
assembly. Step Action Yes No
DTC detecting condition Trouble area
Output voltage of APP sensor (sub) is lower than specified value.
(1 driving detection logic)• APP sensor (sub) circuit
• APP sensor assembly
•ECM
• Incorrect mounting of APP sensor assembly

Downloaded from www.Manualslib.com manuals search engine 1A-156 Engine General Information and Diagnosis:
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”.

Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2APP sensor assembly mounting check
1) Check that APP sensor assembly has been mounted to
vehicle body properly (no pinched floor carpet, etc.).
Is it OK?Go to Step 3. Reinstall APP sensor
assembly properly
referring to “Accelerator
Pedal Position (APP)
Sensor Assembly
Removal and
Installation in Section
1C”.
3APP sensor (sub) and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch, check “APP Sensor 2 Volt”
displayed on scan tool.
Is displayed voltage below 0.179 V?Go to Step 4. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
4ECM voltage check
1) Disconnect connector from APP sensor assembly with
ignition switch turned OFF.
2) Check for proper connection to APP sensor assembly at
“RED”, “YEL” and “WHT” wire terminals.
3) If OK, measure voltage between “RED” wire terminal of
APP sensor assembly connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?Go to Step 7. Go to Step 5.
"GRN" "BLU" "BRN"
"YEL"
"WHT"
"RED"
I4RS0B110048-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-157
5ECM voltage check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Check for proper connection of ECM connector at “E01-
34” terminal.
4) If OK, measure voltage between “E01-34” terminal of
ECM connector and engine ground with ignition switch
turned ON.
Is voltage 4 – 6 V?“RED” wire is open or
high resistance circuit.Go to Step 6.
6Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “E01-34” terminal of ECM
connector and engine ground.
Is resistance infinity?Substitute a known-
good ECM and recheck.“RED” wire is shorted to
ground circuit.
7Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E01-
36”, “E01-52” and “E01-51” terminals.
3) If OK, measure resistance between “YEL” wire terminal
of APP sensor assembly connector and vehicle body
ground.
Is resistance infinity?Go to Step 8. “YEL” wire is shorted to
ground circuit.
8Wire harness check
1) Measure resistance between “E01-36” and each “E01-
52”, “E01-51”, “E01-50” terminals of ECM connector with
ignition switch turned OFF.
Is each resistance infinity?Go to Step 9. “YEL” wire is shorted to
“BLU” wire and/or
“WHT” wire and/or
“E01-50” circuit.
9Wire harness check
1) Measure resistance between “YEL” wire terminal of APP
sensor assembly connector and “E01-36” terminal of
ECM connector with ignition switch turned OFF.
Is resistance below 5
Ω?Go to Step 10. “YEL” wire is open or
high resistance circuit.
10APP sensor assembly check
1) Check APP sensor (sub) referring to “Accelerator Pedal
Position (APP) Sensor Assembly Inspection in Section
1C”.
Is output voltage within specified value?Substitute a known-
good ECM and recheck.Replace APP sensor
assembly. Step Action Yes No