2000 SUZUKI SWIFT display

6-98 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF.
Clear DTC with ignition switch ON, check vehicle and environmental condition for :
–Altitude (barometric pressure) : 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
–Ambient temp. : –10°C, 14°F or higher
–Intake air temp. : 70°C, 158°F or lower
–Engine coolant temp. : 70 – 110°C, 158 – 230°F
2) Start engine and drive vehicle at 35 – 45 mph, 55 – 65 km/h for 8 min. or longer.
While this driving, if “Catalyst Monitoring TEST COMPLETED” is displayed in “READINESS TESTS” mode
and DTC is not displayed in “DTC” mode, confirmation test is completed.
If “TEST NOT COMPLETE” is still being displayed, continue test driving.
3) Decrease vehicle speed at 30 – 40 mph, 50 – 60 km/h, and hold throttle valve at that opening position for 2
min. and confirm that short term fuel trim vary within – 20% – +20% range.
4) Stop vehicle (do not turn ignition switch OFF) and confirm test results according to following “Test Result
Confirmation Flow Table”.
TEST RESULT CONFIRMATION FLOW TABLE
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 persons, a driver and tester, on a level road.
Step Action Yes No
1 Check DTC in “DTC” mode and pending DTC in
“ON BOARD TEST” or “PENDING DTC” mode.
Is DTC or pending DTC displayed?Proceed to applicable
DTC Diag. Flow Table.Go to Step 2.
2 Set scan tool to “READINESS TESTS” mode
and check if testing has been completed.
Is test completed?No DTC is detected (con-
firmation test is com-
pleted).Repeat DTC confirmation
procedure.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-103
DTC P0500 (DTC NO.16) VEHICLE SPEED SENSOR (VSS) MALFUNCTION
WIRING DIAGRAM / CIRCUIT DESCRIPTION
DTC CONFIRMATION PROCEDURE
1) Clear DTC and warm up engine to normal operating temperature.
2) Increase vehicle speed to 50 mph, 80 km/h in 3rd gear or “2” range while observing vehicle speed displayed
on scan tool.
3) Release accelerator pedal and with engine brake applied, keep vehicle coasting (fuel cut condition) for 4
sec. or more.
4) Check pending DTC and DTC.
INSPECTION
1. VSS (vehicle speed sensor) 3. Power supply from ignition switch
2. VSS connector 4. Speedometer, P/S control module and multi information display
[A] : Case of TYPE A is shown (See NOTE) [B] : Case of TYPE B is shown (See NOTE)
ECM
5V+B
BLK/RED
BLK/ORN
PPL
C42 (31P) C41 (24P) G02 (17P)1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 28 27 29 30 315 6
1 2 3 4 5 6 7
11 12
9 10 11 13 12 14 15 16
16 171 2
7 8
13 14 3 4
9 10
15 17 188
19 20 21 22 23 24
1
4 c
a
b2
3
G02-2 [A]
C41-22[B]
NOTE:
For TYPE A and TYPE B, refer to NOTE in “ECM VOLTAGE VALUES TABLE” for applicable model.
DTC DETECTING CONDITION POSSIBLE CAUSE
VSS signal not inputted while vehicle running in “D”
range or during fuel cut at deceleration.
✱2 driving cycle detection logic, continuous monitoring“BLK/ORN” circuit open
“PPL” or “BLK/RED” circuit open or short
VSS malfunction
ECM malfunction
Speedometer malfunction
WARNING:
When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 persons, a driver and a tester.
Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Does speedometer indicate vehicle speed? Go to Step 3. Go to Step 5.

6-104 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Fig. 1 for Step 53 Check Vehicle Speed Signal.
Is vehicle speed displayed on scan tool in step
2) and 3) of DTC confirmation procedure?Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A.Go to Step 4.
4 Check VSS Signal Circuit.
1) Turn ignition switch to OFF position.
2) Disconnect combination meter connectors.
Refer to Section 8.
3) Disconnect P/S control module connector (if
equipped).
4) Turn ignition switch to ON position, without
running engine.
5) Measure voltage from terminal “a” of VSS
connector to ground.
Is voltage within 4 – 5 V?Faulty speedometer.
Faulty P/S control mod-
ule.
Faulty multi information
display.“PPL” wire open or short.
Poor connection of ECM
connector terminal.
If OK, substitute a known-
good ECM and recheck.
5 Check VSS Power Supply.
1) With ignition switch at OFF position, discon-
nect VSS connector.
2) Turn ignition switch to ON position, without
running engine.
3) Measure voltage from terminal “b” to “c” of
VSS connector. See Fig. 1.
Is voltage within 10 – 14 V?Go to Step 6.“BLK/RED” or “BLK/ORN”
wire open or short.
6 Check VSS Signal Circuit.
1) Measure voltage from terminal “a” of VSS
connector to ground.
Is voltage more than 4 V?Go to Step 7.“PPL” wire open or short.
Poor connection of ECM
connector terminal.
If OK, substitute a known-
good ECM and recheck.
7 Check Signal Rotor.
1) Remove VSS.
2) Visually inspect VSS sensor signal rotor for
damage.
Was any damage found?Faulty VSS signal rotor. Poor connection of VSS
connector terminal.
If OK, substitute a known-
good VSS and recheck. Step Action Yes No

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-109
Table 1
Fig. 1 for Step 1
Fig. 2 for Step 22 Check MAP Sensor.
1) Remove MAP sensor from intake manifold
and connect vacuum pump gauge to MAP
sensor. See Fig. 2.
2) Connect scan tool to DLC and turn ignition
switch ON.
3) Check intake manifold absolute pressure
displayed on scan tool for specified valve.
See Table 1.
Is check result satisfactory?Check air intake system
for air being drawn in and
engine compression.
If OK, then substitute a
known-good ECM and
recheck.Replace MAP sensor. Step Action Yes No
Applying Vacuum Displayed Value on Scan Tool
0 Barometric pressure
(Approx. 100 kPa, 760 mmHg)
27 kPa
200 mmHgBarometric pressure – 27 kPa
(Approx. 73 kPa, 560 mmHg)
67 kPa
500 mmHgBarometric pressure – 67 kPa
(Approx. 33 kPa, 260 mmHg)

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-115
INSPECTION
Fig. 1 for Step 3Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Is SUZUKI scan tool available? Go to Step 3. Go to Step 4.
3 Check PNP Signal (“D” range signal).
1) Connect SUZUKI scan tool to DLC with igni-
tion switch OFF. See Fig. 1.
2) Turn ignition switch ON and check PNP sig-
nal (“P/N” or “D” range) on display when
shifting selector lever to each range.
Is “D” range on display (Is 0 – 1 V indicated) no
matter which of “R”, “D”, “2” and “L” range posi-
tions selector lever may be at? See Table 1.Intermittent trouble or
faulty ECM. Check for
intermittent referring to
“Intermittent and poor
connection” in Section 0A.Go to Step 5.
4 Check PNP Signal (“D” range signal).
1) Turn ignition switch ON.
2) Check voltage at terminal C41-14 (Case of
TYPE A. See NOTE) or G02-6 (Case of
TYPE B. See NOTE) of ECM connector
connected. See Fig. 2.
Is “D” range on display (Is 0 – 1 V indicated) no
matter which of “R”, “D”, “2” and “L” range posi-
tions selector lever may be at? See Table 1.Intermittent trouble or
faulty ECM. Check for
intermittent referring to
“Intermittent and poor
connection” in Section 0A.Go to Step 5.
5Is “P/N range on display (Is 10 – 14 V indicated)
when selector lever is at one of “R”, “D”, “2” and
“L” range positions only?Check transmission range
switch and circuits refer-
ring to section 7B.Go to Step 6.
6 Check PNP Signal Circuit.
1) Turn ignition switch OFF.
2) Disconnect TCM connectors.
3) Check for proper connection to TCM at ter-
minal C44-8.
4) If OK, then check voltage at terminal
C44-8 in TCM connector disconnected, with
ignition switch ON.
Is it 10 – 14 V? See Fig. 3“GRN/ORN” circuit open,
poor transmission range
switch connector connec-
tion, select cable malad-
justed, transmission
range sensor malad-
justed or transmission
range sensor malfunction.
If all above are OK, sub-
stitute a known-good
TCM and recheck.“LT BLU” (Case of TYPE
A. See NOTE) or “GRN
RED” (Case of TYPE B.
See NOTE) circuit open or
poor C41-14 (Case of
TYPE A. See NOTE) or
G02-6 (Case of TYPE B.
See NOTE) connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-123
Fig. 1 for Step 105 Check A/C (input) signal circuit referring to Step
1 of Table B-5 A/C Signal Circuit Check, if
equipped. (A/C signal can be also checked by
using SUZUKI scan tool.)
Is it in good condition?Go to Step 6. Repair or replace A/C sig-
nal circuit or A/C system.
6 Check IAC system referring to Step 2 of DTC
P0505 Diag. Flow Table.
Is check result satisfactory?Go to Step 7. Go to Step 3 of DTC
P0505 Diag. Flow Table.
7 Was IAC duty less than about 3% (or more than
about 97% for OFF duty meter) in Step 1 of this
table?Check abnormal air inhal-
ing from air intake system,
PCV valve and EVAP
canister purge control
system.Check TP sensor (closed
throttle position) and ECT
sensor for performance.
If sensors are OK, substi-
tute a known-good ECM.
8 Is SUZUKI scan Tool available? Go to Step 9. Go to Step 10.
9 Check PNP signal (“D” range signal).
1) Connect SUZUKI scan tool to DLC with igni-
tion switch OFF.
2) Turn ignition switch ON and check PNP sig-
nal (“P/N” and “D” range) on display when
shifting selector lever to each range. See
Table 1.
Is check result satisfactory?Go to Step 11. Repair or replace.
10 Check PNP signal (“D” range signal).
1) Turn ignition switch ON.
2) Check voltage at terminal C41-14 (Case of
TYPE A. See NOTE) or G02-6 (Case of
TYOE B. See NOTE) of ECM connector
connected. See Fig. 1 and Table 1.
Is check result satisfactory?Go to Step 11. Repair or replace.
11 Check IAC system referring to Step 2 of DTC
P0505 Diag. Flow Table.
Is check result satisfactory?Go to Step 10. Go to Step 3 of DTC
P0505 Diag. Flow Table.
12 Was IAC duty more than about 30% (or less
than 70% for OFF duty meter) in Step 1 of this
table?Check parts or system
which can cause engine
low idle.
Accessory engine load
Clog of air passage
Etc.Substitute a known-good
ECM and recheck. Step Action Yes No
[A] : Case of TYPE A is shown (See NOTE)
[B] : Case of TYPE B is shown (See NOTE)

6-124 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Table 1 for Step 9 and 10
TABLE B-5 A/C SIGNAL CIRCUITS CHECK (VEHICLE WITH A/C)
Scan tool or voltmeter
SUZUKI SCAN TOOL
DISPLAYVOLTAGE AT C41-14
Selector lever
position“P” and “N” range P/N range 10 – 14V
“R”, “D”, “2” and “L” range D range 0 – 1V
1. Blower fan motor 3. A/C switch 5. A/C evaporator temp. sensor
2. Blower fan switch 4. A/C pressure switch 6. A/C compressor clutch
[A] : Case of TYPE A is shown (See NOTE) [B] : Case of TYPE B is shown (See NOTE)
IG2
M
ECM
PNK/BLU
YEL/GRN
PNK/GRN
WHT/BLK
ORN
PNK/BLK
G02-13
C41-16
C41-1
C42 (31P) C41 (24P) G02 (17P)1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 28 27 29 30 315 6
1 2 3 4 5 6 7
11 12
9 10 11 13 12 14 15 16
16 171 2
7 8
13 14 3 4
9 10
15 17 188
19 20 21 22 23 24
1
234
5
6
C41-18 [A]
C42-30 [B]
G02-14 [A]
G02-1 [B]
G02-14 [B] G02-10 [A]
NOTE:
For TYPE A and TYPE B, refer to NOTE in “ECM VOLTAGE VALUES TABLE” for applicable model.

6-128 ENGINE GENERAL INFORMATION AND DIAGNOSIS
TABLE B-7 RADIATOR FAN CONTROL SYSTEM CHECK
INSPECTION
1. Radiator fan relay No.1 3. Radiator fan relay No.3 [A] : Case of TYPE A is shown (See NOTE)
2. Radiator fan relay No.2 4. Radiator fan [B] : Case of TYPE B is shown (See NOTE)
BATT
80A30A
15A
BLKBLU/WHT
ECM
BLK/ORN
BLK/ORNC42-1
C42-3
L+
L–
H– H+
BLU
C42 (31P) C41 (24P) G02 (17P)1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 28 27 29 30 315 6
1 2 3 4 5 6 7
11 12
9 10 11 13 12 14 15 16
16 171 2
7 8
13 14 3 4
9 10
15 17 188
19 20 21 22 23 24
C41-18
GRN/RED [B]PPL/YEL [A]
BLK/RED
BLU/WHT
BLU/RED
BLK
BLU
BLU/BLK
PPL/YEL
BLU/REDBLK/YEL
BRN/WHT
1
2
34
G02-3 [A]
C41-9 [B]
NOTE:
For TYPE A and TYPE B, refer to NOTE in “ECM VOLTAGE VALUES TABLE” for applicable model.
Step Action Yes No
1 Check Fan Control System.
1) Connect scan tool to DLC with ignition switch OFF.
2) Start engine and select “DATA LIST” mode on scan
tool.
3) Warm up engine until coolant temp. is 97.5°C, 208°F or
higher and A/C switch turn OFF. (If engine coolant
temp. does not rise, check engine cooling system or
ECT sensor.) See Fig. 1.
Is radiator cooling fan started when engine coolant temp.
reached above temp.?Radiator cooling fan
control system is in
good condition.Go to Step 2.
2 Check Radiator Fan Relay and Its Circuit.
1) Check DTC and pending DTC with scan tool.
Is DTC P0480 displayed?Go to DTC P0480 Diag.
Flow Table.Go to Step 3.
3 Check Radiator Fan Relays.
1) Turn ignition switch OFF and remove radiator cooling
fan relays. (No.1 – No.3)
2) Check for proper connection to relay at terminals “c”
and “d”.
3) If OK, check that there is continuity between “c” and “d”
when battery is connected to terminals “a” and “b”. See
Fig. 2.
Is check result satisfactory?Go to Step 4. Replace radia-
tor fan relay(s).