idle SUZUKI SWIFT 2000 1.G SF310 Service Repair Manual

6-1-24 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
ConditionPossible CauseReferring Item
Overheating
Inoperative thermostat

Poor water pump performance

Clogged or leaky radiator

Improper engine oil grade

Clogged oil filter or oil strainer

Poor oil pump performance

Faulty radiator fan control system

Dragging brakes

Slipping clutch

Blown cylinder head gasketThermostat in Section 6B
Water pump in Section 6B
Radiator in Section 6B
Engine oil and oil filter change in
Section 0B
Oil pressure check in Section 6A1
Oil pressure check in Section 6A1
Radiator fan control system in
Section 6E2
Trouble diagnosis in Section 5
Trouble diagnosis in Section 7C
Cylinder head in Section 6A1
Poor gasoline
mileageIgnition system out of order

Leaks or loose connection of high-tension cord

Faulty spark plug (improper gap, heavy deposits
and burned electrodes, etc.)
Engine and emission control system out of
order

Malfunctioning EGR valve

High idle speed

Poor performance of TP sensor, ECT sensor or
MAP sensor

Faulty EGR valve

Faulty fuel injector(s)

Faulty ECM (PCM)
Low compression
Others

Poor valve seating

Dragging brakes

Slipping clutch

Thermostat out of order

Improper tire pressure
High-tension cords in Section 6F1
Spark plugs in Section 6F1
EGR system in Section 6E2
Refer to item “Improper engine
idle speed” previously outlined
TP sensor, ECT sensor or MAP
sensor in Section 6E2
EGR system in Section 6E2
Diagnostic Flow Table B-1
Previously outlined
Valves inspection in Section 6A1
Trouble diagnosis in Section 5
Trouble diagnosis in Section 7C
Thermostat in Section 6B
Refer to Section 3F
Excessive engine
oil consumptionOil leakage

Blown cylinder head gasket

Leaky camshaft oil seals
Oil entering combustion chamber

Sticky piston ring

Worn piston and cylinder

Worn piston ring groove and ring

Improper location of piston ring gap

Worn or damaged valve stem seal

Worn valve stem
Cylinder head in Section 6A1
Camshaft in Section 6A1
Piston cleaning in Section 6A1
Pistons and cylinders inspection
in Section 6A1
Pistons inspection in Section 6A1
Pistons assembly in Section 6A1
Valves removal and installation in
Section 6A1
Valves inspection in Section 6A1

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-27
ConditionPossible CauseReferring Item
Improper engine
idling or engine
fails to idleIgnition system out of order

Faulty spark plug

Leaky or disconnected high-tension cord

Faulty ignition coil with ignitor
Fuel system out of order

Fuel pressure out of specification

Leaky manifold, throttle body, or cylinder head
gasket
Engine and emission control system out of
order

Malfunctioning EGR valve

Faulty idle air control system

Faulty evaporative emission control system

Faulty EGR system

Faulty fuel injector(s)

Poor performance of ECT sensor, TP sensor or
MAP sensor

Faulty ECM (PCM)
Engine overheating
Low compression
Others

Loose connection or disconnection of vacuum
hoses

Malfunctioning PCV valve
Spark plugs in Section 6F
High-tension cords in Section 6F
Ignition coil in Section 6F
Diagnostic Flow Table B-3
EGR system in Section 6E2
Diagnostic Flow Table B-4
EVAP control system in Section
6E2
EGR system in Section 6E2
Diagnostic Flow Table B-1
ECT sensor, TP sensor or MAP
sensor in Section 6E2
Refer to “Overheating” section
Previously outlined
PCV system in Section 6E2

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-29
SCAN TOOL DATA
As the data values given below are standard values estimated on the basis of values obtained from the normally
operating vehicles by using a scan tool, use them as reference values. Even when the vehicle is in good condition,
there may be cases where the checked value does not fall within each specified data range. Therefore, judgment
as abnormal should not be made by checking with these data alone.
Also, conditions in the below table that can be checked by the scan tool are those detected by ECM (PCM) and
output from ECM (PCM) as commands and there may be cases where the engine or actuator is not operating (in
the condition) as indicated by the scan tool. Be sure to use the timing light to check the ignition timing.
NOTE:

With the generic scan tool, only star () marked data in the table below can be read.

When checking the data with the engine running at idle or racing, be sure to shift M / T gear to the neutral
gear position and A / T gear to the “Park” position and pull the parking brake fully. Also, if nothing or “no
load” is indicated, turn OFF A / C, all electric loads, P / S and all the other necessary switches.
SCAN TOOL DATAVEHICLE CONDITIONNORMAL CONDITION /
REFERENCE VALUES
FUEL SYSTEM B1 (FUEL
SYSTEM STATUS)At specified idle speed after warming upCLOSED
(closed loop)

CALC LOAD
(CALCULATED LOADAt specified idle speed with no load after
warming up3 – 9%(
VALUE)At 2500 r / min with no load after warming up12 – 17%

COOLANT TEMP.
(ENGINE COOLANT
TEMP.)
At specified idle speed after warming up85 – 100C,
185 – 212F
SHORT FT BI (SHORT
TERM FUEL TRIM)At specified idle speed after warming up–20 – +20%
LONG FT BI (LONG
TERM FUEL TRIM)At specified idle speed after warming up–15 – +15%

MAP (INTAKE
MANIFOLD ABSOLUTE
PRESSURE)At specified idle speed with no load after
warming up24 – 37 kPa,
180 – 280 mmHg
ENGINE SPEEDAt idling with no load after warming up
Desired
idle speed
± 50 r / min
VEHICLE SPEEDAt stop0 km / h, 0 MPH

IGNITION ADVANCE
(IGNITION TIMING
ADVANCE FOR NO.1
CYLINDER)
At specified idle speed with no load after
warming up9 – 15 BTDC
INTAKE AIR TEMP.At specified idle speed after warming upAmbient +35C (95F)
temp.–5C (23F)
MAF (MASS AIR FLOW
RATE)
At specified idle speed with no load after
warming up0 – 4 gm / sec
RATE)At 2500 r / min with no load after warming up4 – 9 gm / sec

THROTTLE POS
(ABSOLUTE
Ignition switch
ON / engineThrottle valve fully closed7 – 18%
(ABSOLUTE
THROTTLE POSITION)
ON / engine
stoppedThrottle valve fully open70 – 100%
O2S B1 S1 (HEATED
OXYGEN SENSOR-1)At specified idle speed after warming up0.05 – 0.95 V
O2S B1 S2 (HEATED
OXYGEN SENSOR-2)When engine is running at 2000 r / min. for
3 min or longer after warming up.0 – 0.95 V
O2S FT B1 S1At specified idle speed after warning up–20 – +20%
DIS. WITH MIL ON————

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

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.

6-1-46 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.