WIRE SUZUKI SWIFT 2008 2.G Service Workshop Manual

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4ECM voltage check
1) Disconnect connector from APP sensor with ignition
switch turned OFF.
2) Check for proper connection to APP sensor at “RED”, “YEL” and “WHT” wire terminals.
3) If OK, measure voltage between “RED” wire terminal of APP sensor connector and vehicle body ground with
ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 6. Go to Step 5.
5 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E23- 34” terminal.
3) If OK, measure voltage between “E23-34” terminal of ECM connector and engine ground with ignition switch
turned ON.
Is voltage 0 V? Substitute a known-
good ECM and recheck.
“RED” wire is shorted to
power circuit.
6 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E23- 35”, “E23-36” and “E23-34” terminals.
3) If OK, measure resistance between “YEL” wire terminal and each “BRN”, “RED” wire terminals of APP sensor
connector.
Is each resistance infinity? Go to Step 7. “YEL” wire is shorted to
“BRN” wire and/or
“RED” wire.
7 Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between “E23-36” terminal of ECM
connector and engine ground.
Is voltage 0 V? Go to Step 8. “YEL” wire is shorted to
power circuit.
8 Ground circuit check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Measure resistance between “WHT” wire terminal of APP sensor connector and vehicle body ground.
Is resistance below 5
Ω? Go to Step 10. Go to Step 9.
Step Action Yes No
"GRN"
"BLU"
"BRN"
"YEL"
"WHT"
"RED"
I4RS0B110048-01

Downloaded from www.Manualslib.com manuals search engine 1A-168 Engine General Information and Diagnosis:
DTC P2135: Throttle / Pedal Position Sensor / Switch “A”/“B” (Main / Sub) Voltage CorrelationS7RS0B1104076
Wiring Diagram9
Ground circuit check
1) Remove ECM from its br acket with ECM connectors
connected.
2) Check for proper connection of ECM connector at “E23- 51” terminal.
3) If OK, measure resistance between “E23-51” terminal of ECM connector and engine ground.
Is resistance below 5
Ω? “WHT” wire is open or
high resistance circuit.
Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.
10 APP sensor check
1) Check APP sensor (sub) re ferring to “APP Sensor
Assembly Inspection in Section 1C”.
Is output voltage within specified value? Substitute a known-
good ECM and recheck.
Replace APP sensor.
Step Action Yes No
E23
C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
12V
5VBLK/REDBLK/RED
BLK/YEL
12BLK/YEL
BLK/YEL
BRN/WHT
E23-1
E23-60
C37-58
C37-15 C37-30
BLK/ORN
BLKBLKE23-31 BLK
BLK/RED
BLU/ORN
RED/YELYEL/BLU
LT GRN/RED
LT GRN/BLK
RED
GRN
WHT
BLK
E23-16
E23-45
E23-32
C37-45
C37-44
C37-41C37-42
C37-40
C37-54
C37-43
1-1
1-2
1-3 3
4
5
8 67
10
9
E23-29 GRNBLK/WHTWHT
BLK/RED
I6RS0C110045-01
1. Electric throttle body assembly
3. ECM 8. “IG ACC” fuse
1-1. Throttle actuator 4. Main relay9. “IG COIL” fuse
1-2. TP sensor (main) 5. Individual circuit fuse box No.110. Ignition switch
1-3. TP sensor (sub) 6. “TH MOT” fuse
2. Throttle actuator control relay 7. “FI” fuse

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DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure1) 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
• When measuring circuit voltage, resistance and/ or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

DTC detecting condition Trouble area
Difference between the opening angle based on TP
sensor (main) and the opening angle based on TP sensor
(sub) is more than specif ication for specified time
continuously.
(1 driving detection logic) • Throttle position sensor (main) and (sub) circuit
• Electric throttle body
•ECM
Step
Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 Throttle position sensor and its circuit 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.
3 ECM voltage check
1) Disconnect connector from electric throttle body with
ignition switch turned OFF.
2) Check for proper connection to electric throttle body at “RED”, “GRN”, “WHT” and “BLK” wire terminals.
3) If OK, measure voltage between “RED” wire terminal of electric throttle body connector and engine ground with
ignition switch turned ON.
Is voltage 4 – 6 V? Go to Step 6.
Go to Step 4.
"GRN"
"RED"
"WHT"
"BLK"
"LT GRN/BLK"
"LT GRN/RED"
I4RS0B110022-02

Downloaded from www.Manualslib.com manuals search engine 1A-170 Engine General Information and Diagnosis:
4Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “C37-43” terminal of ECM connector and engine ground.
Is resistance infinity? Go to Step 5. “RED” wire is shorted to
other circuit.
5 Wire harness check
1) Measure voltage between “C37-43” terminal of ECM
connector and engine ground with ignition switch turned
ON.
Is voltage 0 V? Substitute a known-
good ECM and recheck.
“RED” wire is shorted to
other circuit.
6 Wire harness check
1) Measure voltage between “GRN” wire terminal of electric
throttle body connector and engine ground, between
“WHT” wire terminal of electric throttle body connector
and engine ground with ignition switch turned ON.
Is each voltage 4 – 6 V? Go to Step 9. Go to Step 7.
7 Wire harness check
1) Turn OFF ignition switch.
2) Disconnect connectors from ECM.
3) Check for proper connection of ECM connector at “C37-
54” and “C37-40” terminals.
4) If OK, measure voltage between “C37-54” terminal of ECM connector and engine ground, between “C37-40”
terminal of ECM connector and engine ground.
Is each voltage 0 V? Go to Step 8. “GRN” wire or “WHT”
wire is shorted to other
circuit.
8 Wire harness check
1) Measure resistance between “GRN” wire terminal of
electric throttle body connector and engine ground,
between “WHT” wire terminal of electric throttle body
connector and engine ground with ignition switch turned
OFF.
Is each resistance infinity? Substitute a known-
good ECM and recheck.
“GRN” wire or “WHT”
wire is shorted to other
circuit.
9 Electric throttle body check
1) Check TP sensor referring to “Throttle Position Sensor
Performance Check” under “Electric Throttle Body
Assembly On-Vehicle Inspection in Section 1C”.
Is each output voltage within specified value? Substitute a known-
good ECM and recheck.
Replace electric throttle
body.
Step Action Yes No

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DTC P2138: Throttle / Pedal Position Sensor / Switch “D”/“E” (Main / Sub) Voltage CorrelationS7RS0B1104077
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure1) 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.
E23 C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 48 32 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
BRN
GRN
BLU
RED
YEL
WHT
E23-35
E23-37
E23-52
E23-34
E23-36
E23-51
E23-50 5 V
5 V
1
1-1 3 2
1-2
I4RS0B110047-01
1. APP sensor
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
Difference between the opening angle based on APP
sensor (main) and the op ening angle based on APP
sensor (sub) is more than sp ecification for specified time
continuously.
(1 driving detection logic) • APP sensor (main) and (sub) circuit
• APP sensor assembly
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-172 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors re ferring to “Inspection of ECM and Its Circuits”.
• Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.

Step Action YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 APP sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check each voltage of “APP Sensor 1 Volt” and “APP Sensor 2 Volt” displayed on scan tool when accelerator
pedal is idle position and fully depressed.
Is displayed each APP 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.
3 ECM voltage check
1) Disconnect connector from APP sensor with ignition
switch turned OFF.
2) Check for proper connection to APP sensor at “BRN”, “GRN”, “BLU”, “RED”, “YEL” and “WHT” wire terminals.
3) If OK, measure voltage between “BRN” wire terminal of APP sensor connector and vehicle body ground,
between “RED” wire terminal of APP sensor connector
and vehicle body ground with ignition switch turned ON.
Is each voltage 4 – 6 V? Go to Step 6.
Go to Step 4.
4 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E23- 35” and “E23-34” terminals.
3) If OK, measure resistance between “E23-35” terminal of ECM connector and engine ground, between “E23-34”
terminal of ECM connector and engine ground.
Is each resistance infinity? Go to Step 5.
“BRN” wire or “RED”
wire is shorted to other
circuit.
5 Wire harness check
1) Measure voltage between “E23-35” terminal of ECM
connector and engine ground, between “E23-34”
terminal of ECM connector and engine ground with
ignition switch turned ON.
Is each voltage 0 V? Substitute a known-
good ECM and recheck.
“BRN” wire or “RED”
wire is shorted to other
circuit.
"GRN"
"BLU"
"BRN"
"YEL"
"WHT"
"RED"
I4RS0B110048-01

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DTC P2227 / P2228 / P2229: Barometric Pressure Circuit MalfunctionS7RS0B1104078
DTC P2227: Barometric Pressure Circuit Range / Performance
DTC P2228: Barometric Pressure Circuit Low
DTC P2229: Barometric Pressure Circuit High
System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Trouble Area6
Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at “E23- 37”, “E23-52”, “E23-36” and “E23-51” terminals.
3) If OK, measure resistance between “GRN” wire terminal of APP sensor connector and vehicle body ground,
between “YEL” wire terminal of APP sensor connector
and vehicle body ground.
Is each resistance infinity? Go to Step 7. “GRN” wire or “YEL”
wire is shorted to other
circuit.
7 Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between “E23-37” terminal of ECM
connector and engine ground, between “E23-36”
terminal of ECM connector and engine ground.
Is each voltage 0 V? Go to Step 8. “GRN” wire or “YEL”
wire is shorted to other
circuit.
8 APP sensor check
1) Check APP sensor referring to “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
DTC P2227:
Difference of barometric pressure value and intake manifold
pressure value is higher than specified value while engine
cranking.
(*2 driving cycle detection logic, monitoring once par driving cycle) • Manifold absolute pressure sensor
performance problem
• Barometric pressure sensor in ECM
DTC P2228:
Barometric pressure signal less than specified value is detected.
(1 driving cycle detection logic) • Barometric pressure sensor in ECM
DTC P2229:
Barometric pressure signal more than specified value is detected.
(1 driving cycle detection logic)

Downloaded from www.Manualslib.com manuals search engine 1A-176 Engine General Information and Diagnosis:
Terminal No. Wire
color Circuit Normal voltage Condition Remarks
C37-1 BLU/
YEL Fuel injector No.1
output 10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V ↑↓
10 – 14 V
(“Reference
waveform No.1: ”,
“Reference waveform No.2: ” and
“Reference waveform No.22: ”) Engine running at idle
after warmed up engine.
Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C37-2 BLU/
WHT Fuel injector No.2
output 10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V ↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform No.3: ”) Engine running at idle
after warmed up engine.
Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C37-3 GRN/
ORN EGR valve
(stepper motor coil
2) output 10 – 14 V Ignition switch turned ON. —
*0 – 1 V ↑↓
10 – 14 V
(“Reference
waveform No.4: ”) Ignition switch is turned to
ST (cranking) position. Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-4 GRN/
RED EGR valve
(stepper motor coil
1) output 10 – 14 V Ignition switch turned ON. —
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.4: ”) Ignition switch is turned to
ST (cranking) position. Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-5 GRN/
WHT Ignition coil No.2
and No.3 output 0 – 0.6 V Ignition switch turned ON. —
*0 – 0.6 V ↑↓
3 – 5 V
(“Reference
waveform No.5: ” and
“Reference waveform No.6: ”) Engine running at idle
after warmed up engine.
Output signal is active
high pulse. Pulse
frequency varies
depending on engine
speed.
C37-6 GRN/
YEL Ignition coil No.1
and No.4 output 0 – 0.6 V Ignition switch turned ON. —
*0 – 0.6 V ↑↓
3 – 5 V
(“Reference
waveform No.6: ”,
“Reference waveform No.7: ” and
“Reference waveform No.22: ”
)Engine running at idle
after warmed up engine.
Output signal is active
high pulse. Pulse
frequency varies
depending on engine
speed.
C37-7 — —— — —
C37-8 BRN/
WHT Generator field coil
monitor signal 10 – 14 V Ignition switch turned ON.
Signal is duty pulse. Duty
ratio varies depending on
vehicle condition.
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.8: ”) Engine running at idle
after warmed up engine.
C37-9 — —— — —

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-177
C37-10 WHTOxygen signal of
HO2S-1 0 – 1 V Ignition switch turned ON.
—
*Deflects between
over 0.5 V and under 0.45 V
(“Reference
waveform No.10: ” and “Reference
waveform No.11: ”) While engine running at
2,000 r/min. for 1 min. or
longer after warmed up.
C37-11 BRN Oxygen signal of
HO2S-2 4 – 5 V Ignition switch turned ON.
—
*Deflects between
over 0.5 V and under 0.45 V
(“Reference
waveform No.12: ”) While engine running at
2,000 r/min. or more after
vehicle running over 30
km/h, 19 mph for 5 min.
C37-12 WHT CAN (low)
(communication
line (active low
signal) to TCM (A/T
model) *0.5 – 2.5 V
(“Reference
waveform No.13: ”) Ignition switch turned ON
with engine stop. CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency which
varies depending on
engine condition.
C37-13 RED CAN (high)
communication line
(active high signal)
to TCM (A/T
model) *2.5 – 4.5 V
(“Reference
waveform No.13: ”)
C37-14 GRY/
RED Output of 5 V
power source for
MAP sensor, A/C
refrigerant
pressure sensor
4.5 – 5.5 V Ignition switch turned ON. —
C37-15 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
C37-16 BLU/
RED Fuel injector No.3
output 10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V ↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform No.14: ”) Engine running at idle
after warmed up engine.
Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C37-17 BLU/
ORNFuel injector No.4
output 10 – 14 V Ignition switch turned ON. —
*0 – 0.6 V ↑↓
10 – 14 V
(“Reference
waveform No.1: ” and
“Reference waveform No.15: ”) Engine running at idle
after warmed up engine.
Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.
C37-18 BRN/
YEL EGR valve
(stepper motor coil
4) output 10 – 14 V Ignition switch turned ON. —
*0 – 1 V ↑↓
10 – 14 V
(“Reference
waveform No.4: ”) Ignition switch is turned to
ST (cranking) position. Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
C37-19 WHT/
RED EGR valve
(stepper motor coil
3) output 10 – 14 V Ignition switch turned ON. —
*0 – 1 V ↑↓
1

0 – 14 V
(“Reference
waveform No.4: ”) Ignition switch is turned to
ST (cranking) position. Output signal is active low
duty pulse. Number of
pulse generated times
varies depending on
vehicle condition.
Terminal
No. Wire
color Circuit Normal voltage
ConditionRemarks

Downloaded from www.Manualslib.com manuals search engine 1A-178 Engine General Information and Diagnosis:
C37-20RED/
YEL CMP sensor signal 0 – 1 V or 4 – 5 V Ignition switch turned ON. —
*0 – 0.6 V↑↓
4 – 5 V
(“Reference
waveform No.16: ” and “Reference
waveform No.17: ”) Engine running at idle
after warmed up engine.
Sensor signal is pulse.
Pulse frequency varies
depending on engine
speed.
(6 pulses are generated
per 1 camshaft revolution.)
C37-21 PNK CKP sensor signal 0 – 1 V or 4 – 5 V Ignition switch turned ON. —
*4 – 5 V↑↓
0 – 0.6 V
(“Reference
waveform No.16: ” and “Reference
waveform No.17: ”) Engine running at idle
after warmed up engine. Sensor signal is pulse.
Pulse frequency varies
depending on engine
speed.
(30 (36 – 6) pulses are
generated per 1
crankshaft revolution.)
C37-22 — — — — —
C37-23 PNK/
BLU Electric load
current sensor
signal 3.8 – 4.2 V Ignition switch turned ON.
—
3.0 – 3.4 V
Ignition switch turned ON
and headlight switch
turned ON (HI beam).
2.3 – 2.7 V Ignition switch turned ON,
headlight switch turned
ON (HI beam) and blower
selector at HI position.
C37-24 LT GRN ECT sensor signal 3.3 – 3.8 V
Ignition switch turned ON,
ECT at 0
°C, 32 °F.
—
1.38 – 1.72 V Ignition switch turned ON,
ECT at 50
°C, 122 °F.
0.40 – 0.53 V Ignition switch turned ON,
ECT at 100
°C, 212 °F.
C37-25 BLK/
YEL IAT sensor signal 3.18 – 3.67 V
Ignition switch turned ON,
IAT at 0
°C, 32 °F.
—
1.32 – 1.65 V Ignition switch turned ON,
IAT at 40
°C, 104 °F.
0.46 – 0.60 V Ignition switch turned ON,
IAT at 80
°C, 176 °F.
C37-26 GRN/
BLK MAF sensor signal 0.5 – 1.5 V
Ignition switch turned ON
with engine at stop.
—
1.5 – 2.0 V
(“Reference
waveform No.18: ”) Wh

en engine running at
specified idle speed after
warmed up.
C37-27 GRY Ground for MAF
sensor Below 0.3 V Ignition switch turned ON.
—
C37-28 BLU/
YEL Generator control
signal output *0 – 0.6 V
↑↓
5 – 8 V
(“Reference
waveform No.19: ”) Engine running at idle
speed, headlight switch
turned ON.
Output signal is active low
duty pulse. Duty ratio
varies depending on
vehicle condition.
C37-29 BLU/
BLK EVAP canister
purge valve output 10 – 14 V
Ignition switch turned ON
with engine at stop. —
*0 – 0.6 V ↑↓
10 – 14 V
(“Reference
waveform No.20: ”) Set EVAP canister purge
valve at 52% by using
“Misc Test” of scan tool.
Output signal is active low
duty pulse. Duty ratio
varies depending on
vehicle condition.
C37-30 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
C37-31 — —— — —
Terminal
No. Wire
color Circuit Normal voltage
ConditionRemarks