C37-47 SUZUKI SWIFT 2006 2.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 1A-14 Engine General Information and Diagnosis:
ECM Input / Output Circuit Diagram
+B
58
IG1 +BB
ST IG2 IG2
60 61
69
BLK/WHT
WHT/RED
BRN/WHTBLK/RED
67
: 72: 73: 5V: 12V 70
59 IG1
YEL/BLK
YEL/GRN
YEL/RED
WHT
BLK/ORN
BLK
BLK
57
62
64
65
63
66
68
5 +B
4PNKBLK/ORN
RED/YEL
7
6GRY/REDRED/BLK
LT GRN
GRY
ORN
+B
BLK/YEL
GRN/BLK
10
ORN
WHT/BLK
9
8
RED
IG1
11
12WHT
BRNRED/BLU
3 3
YEL
BLK/REDBLK/WHT 1
37
38
39
40BLU/YEL
BLU/WHT
BLU/RED
BLU/ORN
42

BRN/YELWHT/RED
GRN/REDGRN/ORN
BLK/RED
BLK
E23-30E23-16
E23-60
E23-1
E23-2E23-29
BLK
WHT
+
+BB
WHT
41BLU/BLK
BRN
2
3
BLU
REDYELWHT
GRN
BLK
LT GRN/BLK
36
34
35
32
WHT
GRNRED
BLU/ORN
LT GRN/RED
RED/YEL
[B]
C37-30E23-31
E23-28
E23-13
C37-58
C37-48
C37-15
GRN/YEL
54
55
GRN/WHTC37-5
C37-6
51
52GRY53E23-47 44
45PNKBLKGRN/WHTE23-15
YEL/RED
YEL/GRN
43YEL
RED
C37-59
C37-60
C37-18C37-19
C37-29
46
47
48
L+
H+
L-
H-
49
LT GRN
GRN
50GRYE23-46
E23-48
C37-4C37-3
C37-17
C37-16
C37-2
C37-1
C37-41C37-42
C37-40
C37-54C37-43
C37-44C37-45
E23-45E23-32E23-35E23-37E23-52
E23-51E23-50
C37-20
C37-21
C37-26C37-27
E23-34E23-36
C37-25
C37-14C37-53
C37-24C37-55
E23-55
E23-57
C37-10
C37-11
C37-5113RED3C37-56C37-52
C37-46
C37-47
C37-57E23-54
C37-50
30
+BB
GRN/WHT
29E23-20
31
DN
BLUE23-12
IG1PNK/BLU
28
C37-23
BLU/YEL27C37-8
C37-28
BRN/WHT
BRNPPL
56
E23-25E23-4
RED/BLUE23-26
71
[A]
16
18
19
18 22
23 22
24
25
21
20
[B] 17
14
IG2
+BB
+BB
REDWHT
BLU/WHT
PPL/WHT
15
REDWHT26
E23-19
E23-5
E23-3E23-18
C37-13C37-12
22
33
3
I7RS0B110005-01

Downloaded from www.Manualslib.com manuals search engine 1A-56 Engine General Information and Diagnosis:
DTC P0037 / P0038: HO2S Heater Control Circuit Low / High (Sensor-2)S7RS0B1104016
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) Start engine and warm up to normal operating temperature.
4) Run engine at idle speed for 1 min.
5) Check DTC and pending 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.

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
BLK/WHT
WHT
11
GRN
3 9
E23-29
BRN
YEL
BLK/WHT
BLKC37-47
C37-11
C37-57
6
2
7
10
BLK
BLUWHT
RED/BLU
1
4
5
8
12
5V
I6RS0C110007-01
1. Main fuse box 4. Junction block assembly 7. Heater 10. To HO2S-1
2. Shield wire 5. “IG COIL” fuse8. To HO2S-1 heater 11. Individual circuit fuse box No.1
3. Ignition switch 6. HO2S-29. ECM 12. “IG ACC” fuse
DTC detecting condition Trouble area
HO2S-2 heater voltage is more than specified value or less than
specified value for 5 seconds continuously
(2 driving cycle detection logic) • HO2S-2 heater
• HO2S-2 heater circuit
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-57
StepAction YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check”.
2 HO2S-2 heater power circuit check
1) Disconnect connector from HO 2S-2 with ignition switch
turned OFF.
2) Check for proper connection to HO2S-2 at “BLK/WHT” and “RED/BLU” wire terminals.
3) If wire and connection are OK, measure voltage between “BLK/WHT” wire terminal of HO2S-2 connector
and engine ground with ignition switch turned ON.
Is voltage over 10 V? Go to Step 3.
“BLK/WHT” wire is open
circuit or shorted to
ground circuit.
3 HO2S-2 heater power circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between “BLK/WHT” wire terminal of HO2S-2 connector and “E23-29” terminal wire of ECM
connector.
Is resistance below 5
Ω? Go to Step 4. “BLK/WHT” wire is high
resistance circuit.
4 HO2S-2 heater drive circuit check
1) Measure resistance between “RED/BLU” wire terminal of
HO2S-2 connector and vehicle body ground.
Is resistance infinity? Go to Step 5. “RED/BLU” wire is
shorted to ground
circuit.
5 HO2S-2 heater drive circuit check
1) Turn ON ignition switch.
2) Measure voltage between “RED/BLU” wire terminal of
HO2S-2 connector and vehicle body ground.
Is voltage 0 V? Go to Step 6. “RED/BLU” wire is
shorted to power circuit.
6 HO2S-2 heater drive circuit check
1) Connect connector to HO2S-2 with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Measure voltage between “C37-47” terminal of disconnected ECM connector and vehicle body ground.
Is voltage over 10 V? Go to Step 7.
“RED/BLU” wire is open
circuit.
7 HO2S-2 heater check
1) Disconnect HO2S-2 connector with ignition switch
turned OFF.
2) Check HO2S-2 heater resistance referring to “HO2S-1 and HO2S-2 Heater On-Vehicle Inspection in Section
1C”.
Is resistance within specified value? Go to Step 8.
Replace HO2S-2.
8 HO2S-2 heater power circuit check
1) Connect connector to HO2S-2 with ignition switch turned
OFF.
2) Measure resistance between “E23-29” and “C37-47” terminals of ECM connector.
Is resistance below 30
Ω? Substitute a known-
good ECM and recheck.
“RED/BLU” wire is high
resistance circuit.

Downloaded from www.Manualslib.com manuals search engine 1A-94 Engine General Information and Diagnosis:
DTC P0137 / P0138: O2 Sensor (HO2S) Circuit Low Voltage / High Voltage (Sensor-2)S7RS0B1104034
Wiring Diagram
DTC Detecting Condition and Trouble Area
E23C37
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
BLK/WHT
WHT
11
GRN
3 9
E23-29
BRN
YEL
BLK/WHT
BLKC37-47
C37-11
C37-57
6
2
7
10
BLK
BLUWHT
RED/BLU
1
4
5
8
12
5V
I6RS0C110007-01
1. Main fuse box 4. Junction block assembly 7. Heater 10. To HO2S-1
2. Shield wire 5. “IG COIL” fuse8. To HO2S-1 heater 11. Individual circuit fuse box No.1
3. Ignition switch 6. HO2S-29. ECM 12. “IG ACC” fuse
DTC detecting condition Trouble area
DTC P0137:
HO2S-2 voltage is lower th an 0.4 V while engine is idling after driving with
high engine load (high speed) for specified time. And HO2S-2 max. voltage
minus HO2S-2 min. voltage is less than 0.1 V for 40 sec continuously.
(2 driving cycle detection logic)
DTC P0138:
HO2S-2 voltage is higher than 0.95 V while engine is idling after driving
with high engine load (high speed) for specified time. And HO2S-2 max.
voltage minus HO2S-2 min. voltage is less than 0.1 V for 40 sec
continuously.
(2 driving cycle detection logic) •HO2S-2
• HO2S-2 circuit
• Fuel system
•ECM
• Fuel shortage
• Exhaust system
• Air intake system

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 Engine General Information and Diagnosis: 1A-187
Reference waveform No.10
HOS2-1 signal (1) with engine idling
Reference waveform No.11
HO2S-1 heater signal (2) with engine idlingReference waveform No.12
HO2S-2 heater signal (4) with engine idling
Reference waveform No.13
CAN communication line signal from TCM with ignition
switch turned ON
Measurement
terminal
CH1: “C37-10” to “C37-57”
CH2: “C37-46” to “C37-58”
Oscilloscope
setting CH1: 500 mV/DIV, CH2: 20 V/DIV
TIME: 1 s/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Engine at specified idle speed
2. HO2S-1 heater signal
Measurement
terminal CH1: “C37-10” to “C37-57”
CH2: “C37-46” to “C37-58”
Oscilloscope
setting CH1: 500 mV/DIV, CH2: 10 V/DIV
TIME: 200 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Engine at specified idle speed
1. HO2S-1 signal
3. OFF signal
4. ON signal
5. One duty cycle
I4RS0B110058-01
I4RS0B110059-01
Measurement
terminal CH1: “C37-11” to “C37-57”
CH2: “C37-47” to “C37-58”
Oscilloscope
setting CH1: 500 mV/DIV, CH2: 10 V/DIV
TIME: 2 s/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Vehicle driving at 60 km/h (37 mph) for 10 min.
• Engine at specified idle speed
1. HO2S-2 signal upper limit
2. HO2S-2 signal lower limit
3. Normal waveform range
Measurement
terminal CH1: “C37-13” to “C37-58”
CH2: “C37-12” to “C37-58”
Oscilloscope
setting CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 40
µs/DIV
Measurement
condition Ignition switch turned ON
(Signal pattern is depending on
engine condition)
1. CAN communication line signal (High)
2. CAN communication line signal (Low)
I4RS0B110060-01
I4RS0B110061-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-193
Reference waveform No.32
VSS signal at 30 km/h (19 mph)
Resistance Check1) Remove ECM from its bracket referring to “ECM Removal and Installation in Section 1C”.
CAUTION!
Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).

2) Connect special tool to ECM connectors securely.
NOTE
Do not connect the other connector of special tool to ECM.

3) Check resistance between each pair of terminals of disconnected connectors (1) as listed in the following table.
CAUTION!
• Be sure to connect ohmmeter probe from wire harness side of coupler.
• Be sure to turn OFF ignition switch for this check.
• Resistance in the following table represents that measured when parts temperature is 20 °C (68 °F).

Measurement
terminal CH1: “E23-25” to “C37-58”
Oscilloscope
setting CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 40 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Vehicle driving at 30 km/h (19 mph)
1. VSS signal for EPS control module
2. ON
3. OFF
I6RS0C110047-01
1
2
I4RS0A110086-02
Terminals CircuitStandard resistance Condition
C37-47 to E23-29 Heater of HO2S-2 4 – 15 Ω—
E23-46 to E23-1/16 Radiator cooling fan relay No.1 160 – 240 Ω —
E23-60 to E23-29 Main relay 160 – 240 ΩBattery disconnected
and ignition switch
turned ON
E23-15 to E23-29 Fuel pump relay 160 – 240 Ω —
C37-16 to E23-1/16 No.3 fuel injector 10.8 – 18.2 Ω —
C37-17 to E23-1/16 No.4 fuel injector
C37-4 to E23-1/16 EGR valve (st epping motor No.1 coil) 20 – 31 Ω —
C37-29 to E23-1/16 EVAP canister purge valve 28 – 35 Ω —
C37-2 to E23-1/16 No.2 fuel injector 10.8 – 18.2 Ω—