2005 SUZUKI SWIFT acc

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-169
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 Engine General Information and Diagnosis: 1A-171
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

Downloaded from www.Manualslib.com manuals search engine 1A-174 Engine General Information and Diagnosis:
DTC Confirmation Procedure
DTC P2227:
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) 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 and warm up
engine to normal operating temperature.
3) Check DTC and pending DTC by using scan tool.
DTC P2228 / P2229: 1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch, clear DTC by using scan tool and run engine for 1 min.
3) 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.

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 Is DTC P2227 set? Go to Step 3.Substitute a known-
good ECM and recheck.
3 MAP sensor check
1) Check MAP sensor and its circuit referring to “DTC
P0107: Manifold Absolute Pressure / Barometric
Pressure Circuit Low Input” and/or “DTC P0108:
Manifold Absolute Pressure / Barometric Pressure
Circuit High Input”.
Is check result satisfactory? Substitute a known-
good ECM and recheck.
MAP sensor or its circuit
malfunction.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-179
C37-32 ——— — —
C37-33 — —— — —
C37-34 — —— — —
C37-35 — —— — —
C37-36 — —— — —
C37-37 — —— — —
C37-38 — —— — —
C37-39 — —— — —
C37-40 WHT TP sensor (sub)
signal 1.57 – 1.09 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.88 – 4.45 V Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C37-41 — Ground for shield
wire of TP sensor
circuit Below 0.3 V Ignition switch turned ON.
—
C37-42 BLK Ground for TP
sensor Below 0.3 V Ignition switch turned ON.
—
C37-43 RED Output for 5 V
power source of TP
sensor 4.5 – 5.5 V Ignition switch turned ON.
—
C37-44 LT
GRN/ BLK Output of throttle
actuator 0 – 1 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
Output signal is pulse.
Duty ratio varies
depending on throttle
valve and accelerator pedal position.
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.21: ”) Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C37-45 LT
GRN/ RED Output of throttle
actuator 0 – 1 V
Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
Output signal is pulse.
Duty ratio varies
depending on throttle
valve and accelerator pedal position.
*0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.21: ”) Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
C37-46 BLK/
RED Heater output of
HO2S-1 10 – 14 V Ignition switch turned ON.
—
*0 – 2 V ↑↓
10 – 14 V
(“Reference
waveform No.10: ” and “Reference
waveform No.11: ”) Engine running at idle
after warmed up engine.
Output signal is active low
duty pulse. Duty ratio
varies depending on
engine condition.
C37-47 RED/
BLU Heater output of
HO2S-2 10 – 14 V Ignition switch turned ON.
—
0 – 1 V
(“Reference
waveform No.12: ”) Engine running at idle
after vehicle running over
30 km/h, 19 mph for 5 min.
C37-48 YEL/
GRN Starting motor
signal 0 – 1 V Ignition switch turned ON.
—
6 – 14 V While engine cranking.
C37-

49 — —— — —
Terminal
No. Wire
color Circuit Normal voltage
ConditionRemarks

Downloaded from www.Manualslib.com manuals search engine 1A-180 Engine General Information and Diagnosis:
C37-50 —Ground of ECM for
shield wire Below 0.3 V Ignition switch turned ON. —
C37-51 — Ground of ECM for
shield wire Below 0.3 V Ignition switch turned ON. —
C37-52 — Ground of ECM for
shield wire Below 0.3 V Ignition switch turned ON. —
C37-53 RED/
BLK MAP sensor signal Approx. 4 V
(“Reference
waveform No.23: ”) Ignition switch turned ON
with barometric pressure
at 100 kPa, 760 mmHg.
—
0.4 – 2.0 V
(“Reference
waveform No.24: ”) While engine running at
specified idle speed after
warmed up with
barometric pressure at
100 kPa, 760 mmHg.
C37-54 GRN TP sensor (main)
signal 0.75 – 1.08 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.67 – 4.24 V Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
C37-55 ORN Ground for sensors Below 0.3 V Ignition switch turned ON. —
C37-56 RED Knock sensor
signal 2 – 3 V
(“Reference
waveform No.25: ” and “Reference
waveform No.26: ”) Ignition switch turned ON.
—
Engine running at 4000 r/
min. after warmed up.
C37-57 YEL Ground for sensors Below 0.3 V Ignition switch turned ON. —
C37-58 BLK/
ORN Ground for ECM Below 0.3 V Ignition switch turned ON.
—
C37-59 YEL/
GRN Oil control valve
ground
Below 1.3 V Ignition switch turned ON.
—
C37-60 YEL/
RED Oil control valve
output *0 – 0.6 V
↑↓
10 – 14 V
(“Reference
waveform No.27: ” and “Reference
waveform No.28: ”) At the moment of ignition
switch turned ON.
Output signal is active
high pulse. Duty ratio
varies depending on
vehicle condition.
Terminal
No. Wire
color Circuit Normal voltage
ConditionRemarks
Terminal
No. Wire
color Circuit Normal voltage Condition Remarks
E23-1 BLK/
RED Main power supply 10 – 14 V Ignition switch turned ON. —
E23-2 WHT/
RED Power source for
ECM internal
memory
10 – 14 V Ignition switch turned ON. —
E23-3 RED CAN (high)
communication line
(active high signal)
for ABS control
module, BCM,
combination meter *2.5 – 4.5 V
(“Reference
waveform No.29: ”) Ignition switch turned ON
with engine at stop. CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency with
varies depending on
engine condition.

Downloaded from www.Manualslib.com manuals search engine 1A-182 Engine General Information and Diagnosis:
E23-25 PPLVehicle speed
signal output for P/
S control module *0 – 1 V
↑↓
10 – 14 V
(“Reference
waveform No.32: ”) Vehicle running. Sensor signal is pulse.
Pulse frequency varies
depending on vehicle
speed.
(21 pulses are generated
per sec. at 30 km/h, 19
mph.) (2561 pulses/km)
E23-26 RED/
BLU EPS signal 10 – 14 V Ignition switch turned ON.
—
0 – 1 V With engine running at idle
speed, and steering wheel
turned to the right or left as
far as it stops.
E23-27 — — — — —
E23-28 YEL/
BLK Serial
communication line
for immobilizer coil
antenna
10 – 14 V Ignition switch turned ON. —
E23-29 BLK/
WHT Ignition switch
signal 0 – 1 V Ignition switch turned OFF.
—
10 – 14 V Ignition switch turned ON.
E23-30 WHT Starting motor
control relay output 0 – 1 V Ignition switch turned ON.
—
0 – 1 V Ignition switch is turned to
ST (engine cranking)
position.
E23-31 BLK Ground for ECM Below 0.3 V Ignition switch turned ON. —
E23-32 RED/
YEL Power supply of
throttle actuator
drive circuit
10 – 14 V Ignition switch turned ON. —
E23-33 — — — — —
E23-34 RED Output for 5 V
power source of
APP sensor (sub) 4.5 – 5.5 V Ignition switch turned ON. —
E23-35 BRN Output for 5 V
power source of
APP sensor (main) 4.5 – 5.5 V Ignition switch turned ON. —
E23-36 YEL APP sensor (sub)
signal 1.55 – 1.65 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
4.18 – 5.12 V Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
E23-37 YEL APP sensor (main)
signal 0.75 – 0.85 V
Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.
—
3.46 – 4.24 V Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.
E23-38 — — — — —
E23-39 — — — — —
E23-40 — — — — —
E23-41 — — — — —
E23-42 — — — — —
E23-43 — — — — —
E23-44 — — — — —
Terminal
No. Wire
color Circuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine 1A-186 Engine General Information and Diagnosis:
Reference waveform No.6
Ignition coil signal (1) with engine idling
Reference waveform No.7
Ignition coil No.1 and No.4 signal (2) with engine idlingReference waveform No.8
Generator field coil monitor signal (1) at engine idling
Reference waveform No.9
Throttle actuator output signal with ignition switch turned
ON
Measurement
terminal
CH1: “C37-6” to “C37-58”
Oscilloscope
setting CH1: 2 V/DIV
TIME: 4 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Engine at specified idle speed
2. 4 – 6 V
3. Ignition coil pulse width: 4 – 5 msec.
Measurement
terminal CH1: “C37-20” to “C37-58”
CH2: “C37-6” to “C37-58”
Oscilloscope
setting CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 40 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Engine at specified idle speed
1. Cylinder reference signal (CMP reference signal)
3. 720 ° crank angle
I4RS0B110055-02
I6RS0C110031-01
Measurement
terminal CH1: “C37-8” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV
TIME: 10 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Engine at specified idle speed
• Lighting switch at CLEARANCE position
Measurement
terminal CH1: “C37-45” to “C37-58”
CH2: “C37-44” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 2 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Ignition switch turned ON and accelerator pedal at idle position
1. Throttle actuator drive signal (“C37-45” terminal)
2. Throttle actuator drive signal (“C37-44” terminal)
3. ON signal
4. OFF signal
5. One duty cycle
I5RS0C110016-01
I4RS0B110081-02