sensor SUZUKI SWIFT 2000 1.G RG413 Service Workshop Manual

6-84 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Fig. 1 for Step 3
Fig. 2 for Step 47 Check EVAP Canister Purge Valve for Closing.
1) Disconnect purge hose from EVAP canister purge
valve.
2) Place finger against the end of EVAP canister purge
valve.
3) Check that vacuum is not felt there, when engine is
cool and running at idle. See Fig. 6.
Is vacuum felt?Check EVAP control
system (See Section
6E1).Go to Step 8.
8 Check MAP Sensor for performance (See DTC P0105
Diag. Flow Table).
Is it in good condition?Go to Step 9. Repair or replace.
9 Check ECT Sensor for performance (See Section 6E1).
Is it in good condition?Go to Step 10. Replace engine
coolant temp. sen-
sor.
10 Check Parts or System which can cause engine rough
idle or poor performance.
Engine compression (See Section 6A1).
Valve lash (See Section 6A1).
Valve timing (Timing belt installation. See Section
6A1).
Are they in good condition?Check wire harness
and connection of
ECM ground, ignition
system and fuel injec-
tor for intermittent
open and short.Repair or replace. Step Action Yes No
1. Fuel pressure gauge & 3 way joint
2. Fuel feed hose
1
2
1

6-86 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC P0325 (DTC NO.17) KNOCK SENSOR CIRCUIT MALFUNCTION
WIRING DIAGRAM / CIRCUIT DESCRIPTION
DTC CONFIRMATION PROCEDURE
1) Clear DTC, start engine and keep it at idle for 1 min.
2) Select “DTC” mode on scan tool and check DTC.
INSPECTION
[A] : Case of TYPE A is shown (See NOTE) [B] : Case of TYPE B is shown (See NOTE)
ECM
5V
RED
E11
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
C42-12 [A]
C42-25 [B]
NOTE:
For TYPE A and TYPE B, refer to NOTE in “ECM VOLTAGE VALUES TABLE” for applicable model.
DTC DETECTING CONDITION POSSIBLE CAUSE
Knock sensor voltage is 3.91 V or more
or
Knock sensor voltage is 1.23 V or less“RED” circuit open or shorted to ground
Knock sensor malfunction
ECM malfunction
Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Check Knock Sensor Signal.
1) With engine running, check voltage from
C42-12 terminal of ECM connector to body
ground. See Fig. 1.
Is voltage about 1.23 – 3.91 V?Knock sensor and its cir-
cuit are in good condition.
Intermittent trouble or
faulty ECM.
Recheck, referring to
Intermittent Trouble in
Section 0A.Go to Step 3.
3 Check Knock Sensor Output.
1) Stop engine.
2) With ignition switch at OFF position, discon-
nect knock sensor connector.
3) With ignition switch at ON position, check
voltage from “RED” terminal of knock sen-
sor connector to body ground. See Fig. 2.
Is it 4 – 5 V?Faulty knock sensor.
Substitute a known-good
knock sensor and
recheck.“RED” wire open, shorted
to ground circuit or poor
C42-12 (Case of TYPE A.
See NOTE) or 42-25
(Case of TYPE B. See
NOTE) connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.

6-88 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC P0335 (DTC NO.23) CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT
MALFUNCTION
WIRING DIAGRAM / CIRCUIT DESCRIPTION
REFERENCE
Connect oscilloscope between terminals C42-23 of ECM connector connected to ECM and ground and check
CKP sensor signal.
DTC CONFIRMATION PROCEDURE
1) Clear DTC and crank engine for 2 sec.
2) Select “DTC” mode on scan tool and check DTC.
ECM
5V+B
BLK/RED
YEL/BLK
C42-23
BLK/ORN
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
DTC DETECTING CONDITION POSSIBLE CAUSE
No CKP sensor signal for 2 seconds at engine crank-
ing.CKP sensor circuit open or short.
Crankshaft timing belt pulley teeth damaged.
CKP sensor malfunction, foreign material being
attached or improper installation.
ECM malfunction.
1. BTDC 5° (Crank angle) [B] : Waveforms at specified idle speed
[A] : Oscilloscope Waveforms [C] : Waveforms at 2000 r/min

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-89
INSPECTION
Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Check CKP Sensor and Connector for proper
installation.
Is CKP sensor installed properly and connector
connected securely?Go to Step 3. Correct.
3 Check Wire Harness and Connection.
1) Disconnect connector from CKP sensor.
2) Check for proper connection to CKP sensor at
each terminal.
3) If OK, turn ignition switch ON and check for
voltage at each terminal of sensor connector
disconnected. See Fig. 1.
Terminal “B+” : 10 – 14 V
Terminal “Vout” : 4 – 5 V
Terminal “GND” : – 0 V
Is check result satisfactory?Go to Step 5. Go to Step 4.
4 Was terminal “Vout” voltage out of specification in
Step 3 check?“YEL/BLK” wire open,
short or poor connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.“BLK/RED” or “BLK/
ORN” wire open, short
or poor connection.
5 Check Ground Circuit for open.
1) Turn ignition switch OFF.
2) Check for continuity between “GND” terminal
of CKP sensor connector and engine ground.
Is continuity indicated?Go to Step 6.“BLK/ORN” wire open
or poor ground con-
nection.
6 Check CKP Sensor for operation.
1) Remove CKP sensor from sensor case.
2) Remove metal particles on end face of CKP
sensor, if any.
3) Connect each connector to ECM and CKP
sensor.
4) Turn ignition switch ON.
5) Check for voltage at terminal C42-23 of con-
nector connected to ECM by passing magnetic
substance (iron) while keeping approximately
1 mm (0.03 in.) gap with respect to end face of
CKP sensor. See Fig. 2 and 3.
Does voltage vary from low (0 –1 V) to high (4 – 5
V) or from high to low?Go to Step 7. Replace CKP sensor.
7 Check Signal Rotor for the following. See Fig. 4.
Damage
No foreign material attached
Is it in good condition?Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A.Clean rotor teeth or
replace CMP sensor.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-91
DTC P0340 (DTC NO.15) CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MAL-
FUNCTION
WIRING DIAGRAM / CIRCUIT DESCRIPTION
REFERENCE
Connect oscilloscope between terminals E21-11 of ECM connector connected to ECM and body ground and
check CMP sensor signal. When CKP circuit is failed (open or short), ECM identify the cylinder only by CMP
sensor signal.
DTC CONFIRMATION PROCEDURE
1) Clear DTC.
2) Start engine and keep it at idle for 1 min.
3) Select “DTC” mode on scan tool and check DTC.
ECM
5V+B
BLK/RED
RED/YEL
BLK/ORN
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
C42-11
DTC DETECTING CONDITION POSSIBLE CAUSE
No CMP sensor signal during engine running (CKP
sensor signal is inputted).CMP sensor circuit open or short.
Signal rotor teeth damaged.
CMP sensor malfunction, foreign material being
attached or improper installation.
Incorrect starter signal.
ECM malfunction.
1. No.1 cylinder 3. No.3 cylinder [A] : Oscilloscope Waveforms [C] : CKP sensor signal
2. No.2 cylinder 4. No.4 cylinder [B] : Waveforms at specified idle speed [D] : CMP sensor signal

6-92 ENGINE GENERAL INFORMATION AND DIAGNOSIS
INSPECTION
Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE
DIAG.
FLOW TABLE”.
2 Check CMP Sensor and connector for proper installa-
tion.
Is CMP sensor installed properly and connector con-
nected securely?Go to Step 3. Correct.
3 Check Wire Harness and Connection.
1) Disconnect connector from CMP sensor.
2) Check for proper connection to CMP sensor at
each terminal.
3) If OK, turn ignition switch ON and check for volt-
age at each terminal of sensor connector discon-
nected. See Fig. 1.
Terminal “B+” : 10 – 14 V
Terminal “Vout” : 4 – 5 V
Terminal “GND” : 0 V
Is check result satisfactory?Go to Step 5. Go to Step 4.
4Was terminal “Vout” voltage out of specification in
Step 3 check?“RED/YEL” wire open,
short or poor connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.“BLK/RED” or “BLK/
ORN” wire open,
short or poor con-
nection.
5 Check Ground Circuit for open.
1) Turn ignition switch OFF.
2) Check for continuity between “GND” terminal of
CMP sensor connector and engine ground.
Is continuity indicated?Go to Step 6.“BLK/ORN” wire
open or poor ground
connection.
6 Check CMP Sensor for operation.
1) Remove CMP sensor from sensor case.
2) Remove metal particles on end face of CMP sen-
sor, if any.
3) Connect each connector to ECM and CMP sensor.
4) Turn ignition switch ON.
5) Check for voltage at terminal C42-11 of connector
connected to ECM by passing magnetic sub-
stance (iron) while keeping approximately 1 mm
(0.03 in.) gap with respect to end face of CMP
sensor. See Fig. 2 and 3.
Does voltage vary from low (0 – 1 V) to high (4 – 5 V)
or from high to low?Go to Step 7. Replace CMP sen-
sor.
7 Check Signal Rotor for the following.
See Fig. 4.
Damage
No foreign material attached
Is it in good condition?Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A.Clean rotor teeth or
replace CMP sensor.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-95
7) Stop vehicle (don't turn ignition switch OFF) and confirm test results according to following “Test Result Con-
firmation Flow Table”.
TEST RESULT CONFIRMATION FLOW TABLE
INSPECTION
Step Action Yes No
1Check DTC in “DTC” mode and pending DTC in
“ON BOARD TEST”.
Is DTC or pending DTC displayed?Proceed to applicable
DTC 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.
(Confirmation test is com-
pleted)Repeat DTC confirmation
procedure.
Step Action Yes No
1Was “ENGINE DIAG. FLOW TABLE” per-
formed?Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Do you have SUZUKI scan tool? Go to Step 4. Go to Step 5.
3 EGR Valve Operation Check :
1) With ignition switch OFF, install SUZUKI
scan tool.
2) Check EGR system referring to Section
6E1.
Is it in good condition?Go to Step 4. Go to Step 5.
4 MAP Sensor Check :
1) Check MAP sensor for performance refer-
ring to Section 6E1.
Is check result satisfactory?Intermittent trouble or
faulty ECM. Check for
intermittent referring to
“Intermittent and Poor
Connection” in Section
0A.Repair or replace.

6-96 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Fig. 1 for Step 55 EGR Valve Power Supply Circuit Check :
1) With ignition switch OFF, disconnect EGR
valve coupler.
2) With ignition switch ON, check voltage
between terminal 2 and ground terminal 5 of
EGR valve connector and ground.
Is each voltage 10 – 14 V?Go to Step 7. Faulty “BLK/RED” wire.
6 EGR Valve Stepper Motor Coil Circuit Check :
1) With ignition switch OFF, connect EGR
valve coupler and disconnect ECM cou-
plers.
2) Check resistance between C41-5 and C41-
2, 9, 8, 17 (Case of TYPE A. See NOTE) or
C42-17, 18, 28, 29 (Case of TYPE B. See
NOTE).
Is each resistance 20 – 24 Ω at 20°C, 68°F?Go to Step 8. Faulty “GRN” (Case of
TYPE A. See NOTE) or
“GRY” (Case of TYPE B.
See NOTE), “GRN/ORN”,
“WHT/RED”, “BRN/YEL”
wire or EGR valve.
7 MAP sensor Check :
1) Check MAP sensor for performance refer-
ring to Section 6E1.
Is check result satisfactory?EGR passage clogged or
EGR valve malfunction. If
all above are OK, intermit-
tent trouble or faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A.Repair or replace. Step Action Yes No
1. EGR valve connector

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