sensor SUZUKI SWIFT 2000 1.G SF310 Service Manual Online

6-1-30 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
SCAN TOOL DATACONDITIONNORMAL CONDITION /
REFERENCE VALUES
DESIRED IDLE
(DESIRED IDLE SPEED)At idling with no load after warming up, M / T
at neutral, A / T at “P” range750 r / min
TP SENSOR VOLT
(THROTTLE POSITIONIgnition switch
ON / engine
Throttle valve fully closedMore than 0.2 V(
SENSOR OUTPUT
VOLTAGE)ON / engine
stoppedThrottle valve fully openLess than 4.8 V
INJ PULSE WIDTH
(FUEL INJECTION
At specified idle speed with no load after
warming up2.0 – 3.6 msec.(
PULSE WIDTH)At 2500 r / min with no load after warming up2.0 – 3.6 msec.
IAC FLOW DUTY (IDLE
AIR CONTROL FLOW
DUTY)
At idling with no load after warming up5 – 25%
TOTAL FUEL TRIMAt specified idle speed after warming up–35 – +35%
BATTERY VOLTAGEIgnition switch ON / engine stop10 – 14 V
CANIST PRG DUTY
(EVAP CANISTER
PURGE FLOW DUTY)
––––––––––––0 – 100%
CLOSED THROT POS
(CLOSED THROTTLEThrottle valve at idle positionON(CLOSED THROTTLE
POSITION)Throttle valve opens larger than idle positionOFF
FUEL CUTWhen engine is at fuel cut conditionONFUEL CUTOther than fuel cut conditionOFF
RADIATOR FAN
(RADIATOR FANIgnition switch
ON
Engine coolant temp.:
Lower than 92.5C
Lower than (199F)
OFF
(
CONTROL RELAY)ONEngine coolant temp.:
97.5C (208F) or higherON
ELECTRIC LOAD
Ignition switch ON / Headlight, small light,
heater fan and rear window defogger all
turned OFF
OFF
ELECTRIC LOADIgnition switch ON / Headlight, small light,
heater fan or rear window defogger turned
ON
ON
A / C SWITCH
Engine running after warming up, A / C not
operatingOFF
A/C SWITCHEngine running after warming up, A / C
operatingON
PNP SIGNAL (PARK /
NEUTRAL POSITIONIgnition switch
Selector lever in “P” or “N”
positionP / N Range
NEUTRAL POSITION
SIGNAL) A / T only
g
ONSelector lever in “R”, “D”, “2”
or “L” positionD Range
EGR VALVEAt specified idle speed after warming up0%
FUEL TANK LEVEL––––––––––––0 – 100%
BAROMETRIC PRESS––––––––––––Display the barometric pressure
FUEL PUMP
Within 3 seconds after ignition switch ON or
engine runningON
Engine stop at ignition switch ON.OFF
BRAKE SWIgnition switchBrake pedal is depressingONBRAKE SWg
ONBrake pedal is releasingOFF
BLOWER FANIgnition switchBlower fan switch ONONBLOWER FA Ng
ONBlower fan switch OFFOFF
A / C MAG CLUTCHIgnition switchA / C switch ONONA/C MAG CLUTCHg
ONA / C switch OFFOFF

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-31
SCAN TOOL DATA DEFINITIONS
FUEL SYSTEM (FUEL SYSTEM STATUS)
Air / fuel ratio feedback loop status displayed as either
open or closed loop. Open indicates that ECM (PCM)
ignores feedback from the exhaust oxygen sensor.
Closed indicates final injection duration is corrected
for oxygen sensor feedback.
CALC LOAD (CALCULATED LOAD VALUE, %)
Engine load displayed as a percentage of maximum
possible load. Value is calculated mathematically us-
ing the formula: actual (current) intake air volume

maximum possible intake air volume x 100%.
COOLANT TEMP.
(ENGINE COOLANT TEMPERATURE, C, F)
It is detected by engine coolant temp. sensor
SHORT FT B1 (SHORT TERM FUEL TRIM, %)
Short term fuel trim value represents short term
corrections to the air / fuel mixture computation. A val-
ue of 0 indicates no correction, a value greater than
0 means an enrichment correction, and a value less
than 0 implies an enleanment correction.
LONG FT B1 (LONG TERM FUEL TRIM, %)
Long term fuel trim Value represents long term correc-
tions to the air / fuel mixture computation. A value of 0
indicates no correction, a value greater than 0 means
an enrichment correction, and a value less than 0 im-
plies an enleanment correction.
MAP (INTAKE MANIFOLD ABSOLUTE
PRESSURE, kPa, inHg)
It is detected by manifold absolute pressure sensor and
used (among other things) to compute engine load.
ENGINE SPEED (rpm)
It is computed by reference pulses from crankshaft
position sensor.
VEHICLE SPEED (km / h, MPH)
It is computed based on pulse signals from vehicle
speed sensor.
IGNITION ADVANCE
(IGNITION TIMING ADVANCE FOR NO.1
CYLINDER, )
Ignition timing of NO.1 cylinder is commanded by
ECM (PCM). The actual ignition timing should be
checked by using the timing light.
INTAKE AIR TEMP. (C, F)
It is detected by intake air temp. sensor and used to
determine the amount of air passing into the intake
manifold as air density varies with temperature.
MAF (MASS AIR FLOW RATE, gm / s, lb / min)
It represents total mass of air entering intake manifold
which is computed based on signals from MAP sen-
sor, IAT sensor, TP sensor, etc.
THROTTLE POS
(ABSOLUTE THROTTLE POSITION, %)
When throttle position sensor is fully closed position,
throttle opening is indicated as 0% and 100% full open
position.
OXYGEN SENSOR B1 S1
(HEATED OXYGEN SENSOR-1, V)
It indicates output voltage of HO2S-1 installed on ex-
haust manifold (pre-catalyst).
OXYGEN SENSOR B1 S2
(HEATED OXYGEN SENSOR-2, V)
It indicates output voltage of HO2S-2 installed on ex-
haust pipe (post-catalyst). It is used to detect catalyst
deterioration.
DESIRED IDLE (DESIRED IDLE SPEED, rpm)
The Desired Idle Speed is an ECM (PCM) internal pa-
rameter which indicates the ECM (PCM) requested
idle. If the engine is not running, this number is not valid.
TP SENSOR VOLT (THROTTLE POSITION
SENSOR OUTPUT VOLTAGE, V)
The Throttle Position Sensor reading provides throttle
valve opening information in the form of voltage.
INJ PULSE WIDTH
(FUEL INJECTION PULSE WIDTH, msec.)
This parameter indicates time of the injector drive
(valve opening) pulse which is output from ECM
(PCM) (but injector drive time of NO.1 cylinder for
multiport fuel injection).
IAC FLOW DUTY (IDLE AIR (SPEED) CONTROL
DUTY, %)
This parameter indicates current flow time rate within
a certain set cycle of IAC valve (valve opening rate)
which controls the amount of bypass air (idle speed).
TOTAL FUEL TRIM (%)
The value of Total Fuel Trim is obtained by putting val-
ues of short Term Fuel Trim and Long Term Fuel Trim
together. This value indicates how much correction is
necessary to keep the air / fuel mixture stoichiomet-
rical.
BATTERY VOLTAGE (V)
This parameter indicates battery positive voltage in-
putted from main relay to ECM (PCM).

6-1-34 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
CONNECTOR “C01”
TERMINAL
NO.CIRCUITNORMAL
VOLTAGECONDITION
1Ground——
2Ground——
3Ground——
4EVAP canister purge valve10 – 14 VIgnition switch ON
Indication
deflection
5Power steering switch
deflection
repeated
0 V and
Ignition switch ON
0 V and
10 – 14 V
6Idle air control valve0 – 13 VAt specified idle speed after engine warmed
up
7Heater of HO2S-110 – 14 VIgnition switch ON
8Fuel injector NO.410 – 14 VIgnition switch ON
9Fuel injector NO.110 – 14 VIgnition switch ON
10Sensor ground——
11Camshaft position sensor0 – 0.8 V
and 4 – 6 VIgnition switch ON
12Blank——
13Heater oxygen sensor-1Refer to DTC P0130 diag. flow table
14Engine coolant temp. sensor0.55 – 0.95 VIgnition switch ON
Engine coolant temp.: 80C (176F)
15Intake air temp. sensor2.0 – 2.7 VIgnition switch ON
Intake air temp.: 20C (68F)
16Blank——
17Electric load signal (+)
0 – 1 VIgnition switch ON
Small light and rear defogger OFF
17Electric load signal (+)
10 – 14 VIgnition switch ON
Small light and rear defogger ON
18Blank——
19Ignition coil #2——
20Ignition coil #1——
21Fuel injector NO.210 – 14 VIgnition switch ON
22Power source for sensor4.75 – 5.25 VIgnition switch ON
23Crankshaft position sensor (+)——
24Crankshaft position sensor (–)——
25Blank——
26Manifold absolute pressure
sensor3.3 – 4.0 VIgnition switch ON
Barometric pressure: 100 kPa (760 mmHg)
27Blank——
28Immobilizer indicator lamp0 – 2 VIgnition switch ON28Immobilizer indicator lamp10 – 14 VWhen engine running
29Blank——
30Blank——
31Fuel injector NO.310 – 14 VIgnition switch ON

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-35
CONNECTOR “C02”
TERMINAL
NO.CIRCUITNORMAL
VOLTAGECONDITION
1A / C ON output signal0 VIgnition switch ON
2EGR valve (stepper motor10 – 14 VIgnition switch ON2coil 1)0 – 1 VEngine running at idle speed
3Data link connector10 – 14 VIgnition switch ON
4Heater of HO2S-210 – 14 VIgnition switch ON
5Power source10 – 14 VIgnition switch ON
6Power source10 – 14 VIgnition switch ON
7Power source for buck-up10 – 14 VIgnition switch ON and OFF
8EGR valve (stepper motor10 – 14 VIgnition switch ON8coil 3)10 – 14 VEngine running at idle speed
9EGR valve (stepper motor10 – 14 VIgnition switch ON9coil 2)10 – 14 VEngine running at idle speed
10Main relay10 – 14 VIgnition switch OFF10Main relay0.4 – 1.5 VIgnition switch ON
112-range signal (A / T)10 – 14 VIgnition switch ON, Select lever at 2-range
12N-range signal (A / T)10 – 14 VIgnition switch ON, Select lever at N-range
13Heated oxygen sensor-2Refer to DTC P0130 diag. flow table
14D-range signal (A / T)10 – 14 VIgnition switch ON, Select lever at D-range
15R-range signal (A / T)10 – 14 VIgnition switch ON, Select lever at R-range
16A/C input signal
10 – 14 VIgnition switch ON
A / C switch OFF
16A/C in ut signal
0 – 2 VIgnition switch ON
A / C switch ON
17EGR valve (stepper motor10 – 14 VIgnition switch ON17coil 4)0 – 1 VEngine running at idle speed
18Radiator fan control relay
10 – 14 V
Ignition switch ON
Engine coolant temp.: Below 92.5C
(199F)
18Radiator fan control relay
0 – 1 V
Ignition switch ON
Engine coolant temp.: Below 97.5C
(208F) or higher
19Fuelpumprelay0 – 1 VFor 2 seconds after ignition switch ON19Fuel um relay10 – 14 VAfter the above time
20Blank——
21P-range signal (A / T)
Indication
deflection
repeated
0 V and
10 – 14 V
Ignition switch ON
22Fuel level sensor (gauge)
0 – 2 VIgnition switch ON
Fuel tank fully filled
22Fuel level sensor (gauge)
4.5 – 7.5 VIgnition switch ON
Fuel tank emptied
23L-range signal (A / T)10 – 14 VIgnition switch ON, Select lever at L-range
24Blank——

6-1-36 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
CONNECTOR “C03”
TERMINAL
NO.CIRCUITNORMAL
VOLTAGECONDITION
1Malfunction indicator lamp0 – 1 VIgnition switch ON1Malfunction indicator lamp10 – 14 VWhen engine running
2
Vehicle speed sensor (M / T)
Indicator
deflection
repeated
0 V and
4 – 6 V
Ignition switch ON
Front left tire turned slowly with front right
tire locked
Output shaft speed sensor
(+) (A / T)0.4 – 0.8 VIgnition switch ON
3Blank——
4Shift solenoidA(A / T)0 VIgnition switch ON, Select lever at P-range4Shift solenoid – A (A / T)10 – 14 VIgnition switch ON, Select lever at D-range
5Throttleposition sensor
0.2 – 1.0 VIgnition switch ON
Throttle valve at idle position
5Throttle position sensor
2.8 – 4.8 VIgnition switch ON
Throttle valve at full open position
6Ignition switch10 – 14 VIgnition switch ON
7Data link connector—Ignition switch ON
8Output shaft speed sensor
(–) (A / T)0.4 – 0.8 VIgnition switch ON
9Blank——
10Sensor ground——
11Shift solenoidB(A / T)0 VIgnition switch ON, Select lever at P-range11Shift solenoid – B (A / T)10 – 14 VIgnition switch ON, Select lever at D-range
12Blank——
13Blank——
14Blank——
15Blank——
16Tachometer (if equipped)0 – 1 VIgnition switch ON
17Engine start switch6 – 12 VWhile engine cranking17g
(Engine start signal)0 – 1 VOther than above

INFORMATION SENSORS
-1. MAP sensor
-2. TP sensor
-3. IAT sensor
-4. ECT sensor
-5. Heated oxygen sensor-1
5-1. Heated oxygen sensor-2
-6. VSS (A / T)
-7. Transmission range switch (A / T)
-8. Battery
-9. CMP sensor
-10. CKP sensor
-11. Fuel level sensor (gauge) (in fuel tank)
-12. PSP switch
-13. A / C control module (if equipped)
-14. VSS (speedometer) (M / T)OTHERS
A: ECM (PCM)
B: Main relay
C: EVAP canister
D: Data link connector CONTROL DEVICES
a: Fuel injector
b: EVAP canister purge valve
c: Fuel pump relay
d: EGR valve (step motor)
e: Malfunction indicator lamp
f: Ignition coil assembly
g: Radiator fan control relay
h: IAC valve
6-1-38 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
COMPONENT LOCATION

MAP
sensor
To other sensorsTo TP sensor
ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-43
DTC P0105 MANIFOLD ABSOLUTE PRESSURE (MAP) CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE

MAP: 4.9 kpa, 37 mmHg or less
(Low pressure – High vacuums – Low voltage)

MAP: 114.7 kpa, 860 mmHg or more
(High pressure – Low vacuums – High voltage)
“G” circuit open

“P” circuit open or shorted to ground

“G” circuit open or shorted to ground

MAP sensor malfunction

ECM (PCM) malfunction
NOTE:
When DTC P0120 is indicated together, it is possible that “P” circuit is open.
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.

6-1-44 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
MAP Sensor Individual Check
1) Disconnect coupler from MAP sensor (1).
2) Remove MAP sensor (1).
3) Arrange 3 new 1.5 V batteries (2) in series (check that total volt-
age is 4.5 – 5.0 V) and connect its positive terminal to “Vin” termi-
nal of sensor and negative terminal to “Ground” terminal. Then
check voltage between “Vout” and “Ground”.
Also, check if voltage reduces when vacuum is applied up to 400
mmHg by using vacuum pump (3).
Output voltage (Vin voltage 4.5 – 5.5 V, ambient temp. 20 –
30C, 68 – 86F)
ALTITUDE
BAROMETRICOUTPUT
(Reference)PRESSUREVOLTAGE
(ft)(m)(mmHg)(kPa)(V)
0


0


760


100

3343

2 000


610


707


94
3.3 – 4.3
2 001


611

Under 70794

3041

5 000


1 524over 634

85
3.0 – 4.1
5 001


1 525

Under 63485

2737

8 000


2 438over 567

76
2.7 – 3.7
8 001


2 439

Under 56776

25–33

10 000


3 048over 526

70
2.5 – 3.3
If check result is not satisfactory, replace MAP sensor (1).
4) Install MAP sensor (1) securely.
5) Connect MAP sensor (1) coupler securely.

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-45
Fig. 1 for Step 2 Fig. 2 for Step 3
INSPECTION
STEPACTIONYESNO
1Was “ENGINE DIAG. FLOW TABLE”
performed?Go to Step 2.Go to “ENGINE DIAG.
FLOW TABLE”.
2Check MAP Sensor and Its Circuit.
1) Connect scan tool to DLC with ignition
switch OFF.
2) Turn ignition switch ON.
3) Check intake manifold pressure.
See Fig. 1.
Is it 114.7 kPa or more or 4.9 kPa or less?Go to Step 3.Intermittent trouble.
Check for intermittent
referring to
“INTERMITTENT AND
POOR CONNECTION” in
Section 0A.
3Check Wire Harness.
1) Disconnect MAP sensor connector with
ignition switch OFF.
2) Check for proper connection of MAP
sensor at “Gr” and “G” wire terminals.
3) If OK, then with ignition switch ON, check
voltage at each of “P” and “Gr” wire
terminals. See Fig. 2.
Is voltage about 4 – 6 V at each terminal?Go to Step 4.“P” wire open or shorted to
ground circuit or shorted to
power circuit, “Gr” wire
open or shorted to ground,
poor C03-5 connection or
C01-22 connection.
If wire and connection are
OK, confirm that MAP
sensor is normal and then
substitute a known-good
ECM (PCM) and recheck.
NOTE: When battery
voltage is applied to
“P” wire, it is possible
that MAP sensor is also
faulty.
4Check MAP sensor according to “MAP
Sensor Individual Check” below.
Is it in good condition?“P” wire shorted to “Gr”
wire, “G” wire open,
poor C01-10 connection.
If wire and connection are
OK, substitute a known-
good ECM (PCM) and
recheck.Replace MAP sensor.

6-1-46 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
IAT sensor
To other sensors
DTC P0110 INTAKE AIR TEMP. (IAT) CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE

Low intake air temperature (High voltage-High resistance)

High intake air temperature (Low voltage-Low resistance)
“Gr / R” circuit open or shorted to power

“G” circuit open

IAT sensor malfunction

ECM (PCM) malfunction
NOTE:

When DTC P0115 and P0120 are indicated together, it is possible that “G” circuit is open.

Before inspecting, be sure to check that ambient temperature is higher than –40C (–40F).
DTC CONFIRMATION PROCEDURE
1) Clear DTC, start engine and keep it at idle for 1 min.
2) Select “DTC” mode no scan tool and check DTC.