blower SUZUKI SWIFT 2005 2.G Service User Guide

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

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-181
E23-4 BRNEngine revolution
signal output for P/
S control module 0 – 0.8 V
Ignition switch turned ON
with engine at stop. —
*0 – 1 V ↑↓
8 – 14 V
(“Reference
waveform No.30: ” and “Reference
waveform No.31: ”) While engine running. Output signal is pulse.
Pulse frequency varies
depending on engine
speed.
(2 pulses are generated
per 1 crankshaft
revolution.)
(3000 r/min. = 100 Hz)
E23-5 PPL/
WHT Serial
communication line
of DLC 12 V
8 – 14 V Ignition switch turned ON. —
E23-6 — — — — —
E23-7 — — — — —
E23-8 — — — — —
E23-9 — — — — —
E23-10 — — — — — E23-11 — — — — —
E23-12 BLU Diagnosis switch
terminal (Hong
Kong model) 4 – 5 V Ignition switch turned ON. —
E23-13 YEL/
RED Clock signal for
immobilizer coil
antenna
10 – 14 V Ignition switch turned ON. —
E23-14 — — — — —
E23-15 GRN/
WHT Fuel pump relay
output 0 – 2.5 V
For 2 sec. from the time
ignition switch is turned
ON or while engine is
running.
—
10 – 14 V On and after 2 sec. from
the time ignition switch is
turned ON or while engine
is at stop.
E23-16 BLK/
RED Main power supply 10 – 14 V Ignition switch turned ON. —
E23-17 — — — — —
E23-18 WHT CAN (low)
communication line
(active low signal)
for ABS control
module, BCM,
combination meter *0.5 – 2.5 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 which
varies depending on
engine condition.
E23-19 BLU/
WHT Electric load signal
for heater blower
motor 10 – 14 V
Ignition switch turned ON,
blower fan selector at OFF
position.
—
0 – 1 V Ignition switch turned ON,
blower fan selector at 2nd
speed position or more.
E23-20 GRN/
WHT Stop lamp switch
signal 0 – 1 V
Ignition switch turned ON,
stop lamp not lit up.
—
10 – 14 V Ignition switch turned ON,
stop lamp lit up.
E23-21 — — — — —
E23-22 — — — — —
E23-23 — — — — —
E23-24 — — — — —
Terminal
No. Wire
color Circuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-183
E23-45BLU/
ORNThrottle actuator
control relay output
0 – 1 V Ignition switch turned ON. —
E23-46 LT GRN Radiator cooling
fan relay No.1
output 10 – 14 V
Ignition switch turned ON,
engine coolant temp.:
below 95
°C (203 ° F), or
A/C refrigerant pressure (if
equipped with A/C): below
600 kPa (87 psi) with A/C
switch turned ON while
engine is running. —
0 – 2 V Ignition switch turned ON,
engine coolant temp.: 97.5
°
C (207.5 ° F) or higher, or
A/C refrigerant pressure (if
equipped with A/C): 1100
kPa (159.5 psi) or higher
with A/C switch turned ON
while engine is running.
E23-47 GRY A/C compressor
relay output 10 – 14 V
Engine running, A/C
switch OFF and blower
selector at OFF position.
—
0 – 1 V Engine running, A/C
switch ON and blower
selector at 1st position or
more.
E23-48 GRN Radiator cooling
fan relay No.2 and
No.3 output 10 – 14 V
Ignition switch turned ON,
engine coolant temp.:
below 100
°C (212 °F), or
A/C refrigerant pressure (if
equipped with A/C): below
1200 kPa (174 psi) with A/
C switch turned ON while
engine is running. —
0 – 2 V Ignition switch turned ON,
engine coolant temp.:
102.5
°C (216.5 °F) or
higher, or A/C refrigerant
pressure (if equipped with
A/C): 1500 kPa (217.5 psi)
or higher with A/C switch
turned ON while engine is
running.
E23-49 — — — — —
E23-50 — Ground for shield
wire of APP sensor Below 0.3 V Ignition switch turned ON. —
E23-51 WHT Ground for APP
sensor (sub) Below 0.3 V Ignition switch turned ON. —
E23-52 BLU Ground for APP
sensor (main) Below 0.3 V Ignition switch turned ON. —
E23-53 — — — — —
E23-54 ORN Ground for sensors Below 0.3 V Ignition switch turned ON. —
Terminal
No. Wire
color Circuit Normal voltage Condition Remarks

Downloaded from www.Manualslib.com manuals search engine 1A-184 Engine General Information and Diagnosis:
Reference waveform No.1
Fuel injector signal (1) with engine idling
E23-55 RED
A/C refrigerant
pressure sensor
signal 1.38 – 1.52 V
Engine running, A/C
switch OFF and blower
selector at OFF position,
A/C refrigerant pressure:
800 kPa (116 psi)
—
2.15 – 2.38 V Engine running, A/C
switch ON and blower
selector at 1st position or
more, A/C refrigerant
pressure: 1400 kPa (203
psi)
2.67 – 2.95 V Engine running, A/C
switch ON and blower
selector at 1st position or
more, A/C refrigerant
pressure: 1800 kPa (261
psi)
E23-56 — — — — —
E23-57 WHT/
BLK A/C evaporator
outlet air temp.
sensor signal
(manual A/C
model) 3.4 – 3.7 V
Ignition switch turned ON
at A/C evaporator outlet
temperature 0
°C (32 °F).
—
2.5 – 2.8 V Ignition switch turned ON
at A/C evaporator outlet
temperature 15
°C (59 °F).
1.7 – 2.0 V Ignition switch turned ON
at A/C evaporator outlet
temperature 30
°C (86 °F).
E23-58 — — — — —
E23-59 — — — — —
E23-60 BRN/
WHT Main power supply
relay output 10 – 14 V Ignition switch turned OFF.
—
0 – 2 V Ignition switch turned ON.
Terminal
No. Wire
color Circuit Normal voltage Condition Remarks
Measurement
terminal CH1: “C37-2” to “C37-58”
Oscilloscope
setting CH1: 20 V/DIV
TIME: 1 ms/DIV
Measurement
condition • After warmed up to normal
operating temperature
• Engine at specified idle speed
2. Fuel injection pulse width: 2 – 4 msec.
3. 10 – 14 V
I4RS0B110050-01

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-205
A/C System Circuits CheckS7RS0B1104084
Wiring Diagram
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/REDBLK/RED
BLK/YELBLK/YEL
BLK/YEL
BRN/WHT
12V
5V
12
E23-1
E23-60
BLK/RED
LT GRN
BLK/REDE23-16
E23-46
L+
L–
H–
H
+
BLU/RED
BLK
BLUWHTBLK
BLU/BLK
BLU/RED
GRN
GRY
E23-48
8
11
2
3BLU/WHT
REDWHTREDWHTE23-3E23-18
E23-19
6
BLK
WHT
BLK 12V
E23-47 GRY
WHT
YELBLU
WHT
BLK/YEL
RED/BLK
GRN/WHT
WHT/BLU1
713
14
5V
5V
4
E23-55C37-14GRY/REDRED
E23-54ORN 5V
E23-57WHT/BLK16
9
10
25
17
5
24
15
22
BLU/YEL
23212019
GRN
BLK
18
26
28
27
I6RS0C110042-01
1. Blower fan motor 11. Radiator cooling fan motor 21. “A/C COMP” fuse
2. Blower fan switch 12. Main relay 22. “IG ACC” fuse
3. A/C switch 13. ECM 23. “RDTR FAN” fuse
4. A/C refrigerant pressure sensor 14. Ignition switch 24. Junction block assembly
5. Blower motor relay 15. BCM 25. “IG2 SIG” fuse
6. Compressor relay 16. Evaporator outlet air temp. sensor 26. HVAC control module
7. A/C compressor 17. “BACK” fuse 27. For manual A/C
8. Radiator cooling fan relay No.1 18. Individual circuit fuse box No.1 28. For automatic A/C
9. Radiator cooling fan relay No.2 19. “HTR FAN” fuse
10. Radiator cooling fan relay No.3 20. “FI” fuse

Downloaded from www.Manualslib.com manuals search engine 1A-206 Engine General Information and Diagnosis:
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”.
• When A/C evaporator outlet air temp. is below 2.5 °C (36.5 °F), A/C remains OFF (“E23-47” terminal
voltage becomes 10 – 14 V). This condition is not abnormal.

Step Action YesNo
1 Reception data check from BCM
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check DTC for reception data from BCM.
Is there DTC P1678? Go to applicable DTC
diag. flow.
Go to Step 2.
2 A/C switch signal circuit check
1) Start engine and select “DATA LIST” mode on scan tool.
2) Check A/C switch signal under following conditions
respectively.
A/C switch signal
Engine running, A/C switch OFF: OFF
Engine running, A/C switch ON and blower speed
selector turned 1st position or more: ON
Is check result satisfactory? Go to Step 3. Check A/C switch
circuit.
3 DTC check of ECT sensor circuit
1) Check ECM for DTC of ECT sensor circuit.
Is there DTC P0116, DTC P0117 or DTC P0118? Go to applicable DTC
diag. flow.
Go to Step 4.
4 Radiator cooling fan control system check
Is radiator cooling fan started when A/C and blower speed
selector switch are turned ON with engine running? Go to Step 10. Go to Step 5.
5 Radiator cooling fan control circuit check
1) Check DTC with scan tool.
Is DTC P0480 displayed? Go to “DTC P0480: Fan
1 (Radiator Cooling
Fan) Control Circuit”.
Go to Step 6.

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-207
6A/C evaporator outlet air temp. sensor check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection to “E23-57” and “E23-54” wire terminals of ECM connector.
3) If OK, measure resistance between “E23-57” and “E23- 54” wire terminals of ECM connector.
Evaporator temp. sensor resistance
At 0 °C: 6.3 – 6.9 k Ω
At 25 °C: 1.8 – 2.2 k Ω
Is resistance within specification? Go to Step 7. Faulty A/C evaporator
outlet air temp. sensor
or its circuit.
7 DTC check of A/C refrigerant pressure sensor circuit
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check ECM for DTC of A/C refrigerant pressure sensor circuit.
Is there DTC P0532 or DTC P0533? Go to applicable DTC
diag. flow.
Go to Step 8.
8 A/C refrigerant pressure sensor voltage check
1) Check A/C refrigerant pressure sensor voltage referring
to “Inspection of ECM and Its Circuits”.
Is voltage within specified value? Go to Step 9. Check amount of
refrigerant. If OK,
replace A/C refrigerant
pressure sensor.
9 Radiator cooling fan check
1) Check radiator cooling fan referring to “Radiator Cooling
Fan Motor On-Vehicle Inspection in Section 1F”.
Is check result satisfactory? Radiator cooling fan
drive circuit malfunction.
If circuit is OK, go to
St ep 6 .
Replace radiator cooling
fan motor.
10 A/C compressor control system check
Is A/C compressor started when A/C and blower speed
selector switch are turned ON with engine running? A/C system is in good
condition.
Go to Step 11.
Step Action Yes No
7
6
5
4
3
2
1
10
20 30
40 50
0
10
2030
60 70 80
ResistanceTemperatureI3RB0A110053-01

Downloaded from www.Manualslib.com manuals search engine 1A-208 Engine General Information and Diagnosis:
11A/C compressor relay circuit check
1) Measure voltage between “E23-47” wire terminal of
ECM connector and vehicle body ground under following
conditions respectively.
Voltage between “E23-47” terminal of ECM
connector and ground
While engine running and A/C switch turned OFF: 10
– 14 V
While engine running, A/C and blower speed
selector switch turned ON: 0 – 1 V
Is check result satisfactory? Go to Step 12. Go to Step 13.
12 A/C compressor relay check
1) Check A/C compressor rela y referring to “Compressor
Relay Inspection in Sectio n 7B” or “Compressor Relay
Inspection in Section 7B”.
Is it in good condition? A/C compressor drive
circuit malfunction.
Replace A/C
compressor relay.
13 A/C compressor relay circuit check
1) Remove A/C compressor re lay with ignition switch
turned OFF.
2) Turn ON ignition switch, measure voltage between “BLK/ RED” wire terminal of A/C compressor relay connector
and vehicle body ground.
Is voltage 10 –14 V? Go to Step 14. “BLK/RED” wire is open
circuit.
14 A/C compressor relay check
1) Check A/C compressor rela y referring to “Compressor
Relay Inspection in Sectio n 7B” or “Compressor Relay
Inspection in Section 7B”.
Is it in good condition? “GRY” wire is open
circuit. If OK, substitute
a known-good ECM and
recheck.
Replace A/C
compressor relay.
Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-209
Electric Load Signal Circuit CheckS7RS0B1104085
Wiring Diagram
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 referri ng to “Inspection of ECM and Its Circuits”.

BLK/WHT
BLK/RED
WHT
BRN/WHT
12V5V
11
BLK/YELBLK/YEL
BLK/YEL
BLKBLKBLK
BLK/ORN
10
18
17
BLU/WHT
15
WHTRED
43
YEL
5
13
BLK/WHT
BLKBLK/YEL
GRN
WHT
/BLU
BLU
16
2
6
7
12
8
9
BLK
WHT
RED
E23-29
E23-60
E23-1E23-16
E23-9
E23-3E23-18
C37-58C37-15
E23-31C37-30
BLK/RED
[A]
[B]
E23 C37
34
1819
567
10
11
17
20
47 46
495051
2122
52 16
25 9
24
14
29
5557 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
4042 39 38
44
45 43 41 331
1213
238
34
1819
567
10
11
17
20
47 46
495051
2122
52 16
25 9
24
14
29
5557 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
4042 39 38
44
45 43 41 331
12
13
238
1
14
I7RS0B110016-01
[A]: Manual A/C model
6. Ignition switch13. Blower motor
[B]: Auto A/C model 7. Junction block assembly14. HVAC control module
1. Main fuse 8. “IG COIL” fuse15. Blower speed selector
2. Individual circuit fuse box No.1 9. “IG2 SIG” fuse16. Electric load (rear defogger signal and headlight signal), etc.
3. “IG ACC” fuse 10. ECM17. BCM
4. “FI” fuse 11. Main relay18. ABS/ESP® control module
5. “HTR FAN” fuse 12. Blower motor relay
StepAction YesNo
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there any DTS(s) related to CAN? Go to applicable DTC
diag. flow.
Go to Step 2.

Downloaded from www.Manualslib.com manuals search engine 1A-210 Engine General Information and Diagnosis:
2Electric load signal circuit check
1) Start engine and select “Data List” mode on scan tool.
2) Check electric load signal under following conditions
respectively.
Blower fan signal (Manual A/C model)
Blower speed selector turned OFF or 1st position:
OFF
Blower speed selector turned to 2nd position or
more: ON
Blower fan signal (Auto A/C model)
Blower speed selector OFF or 4th position or less:
OFF
Blower speed selector turned to 6th position or
more: ON
Radiator fan signal
Engine coolant temperature is lower than 95 °C (103
° F): OFF
Engine coolant temperature is higher than 97.5 °C
(207.5 °F): ON
Electric load signal
Engine running, rear defogger switch, small light or
headlight switch OFF: OFF
Engine running, rear defogger switch, small light or
headlight switch ON: ON
Is check result satisfactory? Electric load signal
circuit is in good
condition.
Check defective signal
circuit.
Step Action Yes No