2000 SUZUKI SWIFT tbi for g10
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6-16 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
DTC
NO.DETECTING ITEMDETECTING CONDITION
(DTC will set when detecting:)MIL
P0335Crankshaft position sensor
circuit malfunctionNo signal during engine running1 driving cycle
P0340Camshaft position sensor
circuit malfunctionNo signal for 2 sec. during engine cranking1 driving cycle
P0420Catalyst system efficiency
below threshold
Output waveforms of HO2S-1 and HO2S-2
are similar.
(Time from output voltage change of HO2S-1
to that of HO2S-2 is shorter than
specification.)
2 driving cycles
P0443EVAP Purge control valve
circuit malfunctionPurge control valve circuit is open or shorted
to ground2 driving cycles
P0480Radiator fan control circuit
malfunctionRadiator cooling fan relay terminal voltage is
low when cooling temp. is lower than
specification
2 driving cycles
P0500Vehicle speed sensor
malfunctionNo signal while running in “D” range or during
fuel cut at decelerating2 driving cycles
P0505Idle control system malfunction
Throttle opening change is small as compared
with electrically live time. Throttle valve opening
is not within its target range with CTP switch ON
or drive voltage exists though ECM (PCM) is not
outputting ISC drive command.
1 driving cycle
P0510Closed throttle position switch
malfunctionSwitch does not change from ON to OFF
(or from OFF to ON) even when vehicle speed
reaches over (or below) specification.
2 driving cycle
P1250Early Fuel Evaporation Heater
Circuit MalfunctionHeater monitor terminal voltage is higher than
specified value when EFE OFF or it is lower
than specified value when EFE ON.
2 driving cycles
P1450Barometric pressure sensor
circuit malfunctionBarometric pressure is lower or higher than
specification. (or sensor malfunction)1 driving cycle
P1451Barometric pressure sensor
performance problem
Difference between manifold absolute
pressure (MAP sensor value) and
barometric pressure (barometric pressure
sensor value) is larger than specification
during cranking.
2 driving cycles
P1500Starter signal circuit
malfunctionStarter signal is not inputted from engine
cranking till its start and after or it is always
inputted
2 driving cycles
P1510ECM (PCM) backup power
source malfunctionNo backup power after starting engine1 driving cycle
Page 68 of 557
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-17
DTC
NO.DETECTING ITEMDETECTING CONDITION
(DTC will set when detecting:)MIL
P0705Transmission range sensor (switch)
circuit malfunction (A / T)No signal or multiple signals inputted with
shifted in “D” range1 driving
cycle
P0720Output speed sensor circuit
malfunction (A / T)No signal while running vehicle with “D” or
“2” range.1 driving
cycle
P0751Shift solenoid A (#1) performance
or stuck offWhile running in “D” range, engine speed as
compared to vehicle speed is higher or2 driving
P0756Shift solenoid B (#2) performance
or stuck offcom ared to vehicle s eed is higher or
lower than specified value.cycles
P0753Shift solenoid A (#1) electrical (A / T)Output command from PCM and output
voltage do not agree (solenoid circuit1 driving
P0758Shift solenoid B (#2) electrical (A / T)
voltage do not agree. (solenoid circuit
shorted to ground or open)cycle
P1620ECU code not registered
P1621No ECU code transmitted from
Immobilizer Control Module
Refer to Section 8A.
P1622Fault in ECM (PCM)
P1623ECU code not matched
Page 69 of 557
6-18 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
FAIL-SAFE TABLE
When any of the following DTCs is detected, ECM (PCM) enters fail-safe mode as long as malfunction continues
to exist but that mode is canceled when ECM (PCM) detects normal condition after that.
DTC NO.
DETECTED ITEMFAIL-SAFE OPERATION
P0105Manifold absolute pressure circuit
malfunctionECM (PCM) uses value determined by throttle
opening and engine speed.
ECM (PCM) stops EVAP purge control.
P0110Intake air temp. circuit malfunctionECM (PCM) controls actuators assuming that
intake air temperature is 20C (68F).
P0115Engine coolant temp. circuit malfunction
ECM (PCM) controls actuators assuming that
engine coolant temperature is 80C (176F).
ECM (PCM) operates radiator fan.
ECM (PCM) stops A / C and idle speed control.
P0120Throttle position circuit malfunction
ECM (PCM) controls actuators assuming that
throttle opening is 20.
ECM (PCM) stops idle speed control.
P0500Vehicle speed sensor malfunctionECM (PCM) stops idle air control.
P1450Barometric pressure sensor low /
high inputECM (PCM) controls actuators assuming that
barometric pressure is 100 kPa (760 mmHg).
Page 70 of 557
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-19
Operation
VISUAL INSPECTION
Visually check following parts and systems.
INSPECTION ITEM
REFERRING SECTION
Engine oil ––––– level, leakage
Engine coolant ––––– level, leakage
Fuel ––––– level, leakage
A / T fluid ––––– level, leakage
Air cleaner element ––––– dirt, clogging
Battery ––––– fluid level, corrosion of terminal
Water pump belt ––––– tension, damage
Throttle cable ––––– play, installation
Vacuum hoses of air intake system ––––– disconnection,
looseness, deterioration, bend
Connectors of electric wire harness ––––– disconnection, friction
Fuses ––––– burning
Parts ––––– installation, bolt ––––– looseness
Parts ––––– deformation
Other parts that can be checked visually
Also check following items at engine start, if possible
Malfunction indicator lamp
Charge warning lamp
Engine oil pressure warning lamp
Engine coolant temp. meter
Fuel level meter
Tachometer, if equipped
Abnormal air being inhaled from air intake system
Exhaust system ––––– leakage of exhaust gas, noise
Other parts that can be checked visuallySection 0B
Section 0B
Section 0B
Section 0B
Section 0B
Section 0B
Section 6E1
Section 8
Section 6
Section 6H
Section 8 (section 6 for pressure check)
Section 8
Section 8
Page 71 of 557
6-20 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
ENGINE BASIC INSPECTION
This check is very important for troubleshooting when ECM (PCM) has detected no DTC and no abnormality has
been found in visual inspection.
Follow the flow table carefully.
STEP
ACTIONYESNO
1Was “ENGINE DIAG. FLOW TABLE” performed?Go to Step 2.Go to “ENGINE DIAG.
FLOW TABLE”.
2Check battery voltage.
Is it 11 V or more?Go to Step 3.Charge or replace
battery.
3Is engine cranked?Go to Step 4.Go to “DIAGNOSIS”
in Section 6G.
4Does engine start?Go to Step 5.Go to Step 7.
5Check idle speed as follows.
1) Warm up engine to normal operating temp.
2) Shift transmission to neutral position for M / T
(“P” position for A / T).
3) All of electrical loads are switched off.
4) Check engine idle speed with scan tool.
See Fig. 1.
Is it 800 – 900 r / min.?Go to Step 6.Go to “ENGINE
DIAGNOSIS TABLE”.
6Check ignition timing as follows.
1) Select “MISC” mode on SUZUKI scan tool and
fix ignition timing to initial one. See Fig. 2.
2) Using timing light (1), check initial ignition timing.
See Fig. 3.
Is it 5 ± 3 BTDC at specified idle speed?Go to “ENGINE
DIAGNOSIS TABLE”.Check ignition control
related parts referring
to Section 6F.
7Check immobilizer system malfunction as follows.
1) Check immobilizer indicator lamp for flashing.
Is it flashing when ignition switch is turned to ON
position?Go to “DIAGNOSIS” in
Section 8A.Go to Step 8.
8Check fuel supply as follows.
1) Check to make sure that enough fuel is filled in fuel
tank.
2) Turn ON ignition switch for 2 seconds and then
OFF. See Fig. 4.
Is fuel return pressure (returning sounds) felt from fuel
feed hose (1) when ignition switch is turned ON?Go to Step 10.Go to Step 9.
9Check fuel pump for operating.
1) Was fuel pump operating sound heard from fuel
filler for about 2 seconds after ignition switch ON
and stop?Go to “DIAG. FLOW
TABLE B-3”.Go to “DIAG. FLOW
TABLE B-2”.
10Check ignition spark as follows.
1) Disconnect injector coupler.
2) Remove spark plugs and connect them to high
tension cords.
3) Ground spark plugs.
4) Crank engine and check if each spark plug sparks.
Is it in good condition?Go to Step 11.Go to “DIAGNOSIS”
in Section 6F.
11Check fuel injector for operation as follows.
1) Install spark plugs and connect injector
connectors.
2) Check that fuel is injected out in conical shape
from fuel injector when cranking.
Is it in good condition?Go to “ENGINE
DIAGNOSIS TABLE”.Go to “DIAG. FLOW
TABLE B-1”.
Page 72 of 557
Select “DATA
LIST” modeSELECT MENU
F4: MISC TEST
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-21
Fig. 1 for Step 5 Fig. 2 for Step 6 Fig. 3 for Step 6
Fig. 4 for Step 8 Fig. 5 for Step 11
Page 73 of 557
6-22 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
ENGINE DIAGNOSIS TABLE
Perform troubleshooting referring to following table when ECM (PCM) has detected no DTC and no abnormality
has been found in visual inspection and engine basic inspection previously.
Condition
Possible CauseReferring Item
Hard Starting
(Engine cranks OK)Ignition system out of order
Faulty spark plug
Leaky high-tension cord
Loose connection or disconnection of high-
tension cords or lead wires
Faulty ignition coil
Fuel system out of order
Dirty or clogged fuel hose or pipe
Malfunctioning fuel pump
Air inhaling from intake manifold gasket or
throttle body gasket
Fuel injector resistor malfunction
Engine and emission control system out of
order
Faulty idle control system
Faulty ECT sensor or MAP sensor
Faulty ECM (PCM)
Low compression
Poor spark plug tightening or faulty gasket
Compression leak from valve seat
Sticky valve stem
Weak or damaged valve springs
Compression leak at cylinder head gasket
Sticking or damaged piston ring
Worn piston, ring or cylinder
Others
Malfunctioning PCV valve
Spark plugs in Section 6F
High-tension cords in Section 6F
High-tension cords in Section 6F
Ignition coil in Section 6F
Diagnostic Flow Table B-3
Diagnostic Flow Table B-3
Fuel injector resistor in Section 6E1
Diagnostic Flow Table P0505
ECT sensor or MAP sensor in
Section 6E1
Compression check in Section
6A
Spark plugs in Section 6F
Valves inspection in Section 6A
Valves inspection in Section 6A
Valve springs inspection in
Section 6A
Cylinder head inspection in
Section 6A
Cylinders, pistons and piston rings
inspection in Section 6A
Cylinders, pistons and piston rings
inspection in Section 6A
PCV system in Section 6E1
Page 74 of 557
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-23
ConditionPossible CauseReferring Item
Low oil pressureImproper oil viscosity
Malfunctioning oil pressure switch
Clogged oil strainer
Functional deterioration of oil pump
Worn oil pump relief valve
Excessive clearance in various sliding partsEngine oil and oil filter change in
Section 0B
Oil pressure switch inspection in
Section 8
Oil pan and oil pump strainer
cleaning in Section 6A
Oil pump in Section 6A
Oil pump in Section 6A
Engine noise
Note: Before
checking mechanical
noise, make sure
that:
Specified spark
plug in used.
Specified fuel is
used.Valve noise
Improper valve lash
Worn valve stem and guide
Weak or broken valve spring
Warped or bent valve
Piston, ring and cylinder noise
Worn piston, ring and cylinder bore
Connecting rod noise
Worn rod bearing
Worn crank pin
Loose connecting rod nuts
Low oil pressure
Crankshaft noise
Low oil pressure
Worn bearing
Worn crankshaft journal
Loose bearing cap bolts
Excessive crankshaft thrust play
Valve lash in Section 6A
Valves inspection in Section 6A
Valve springs inspection in
Section 6A
Valves inspection in Section 6A
Pistons and cylinders inspection
in Section 6A
Crank pin and connecting rod
bearing inspection in Section 6A
Crank pin and connecting rod
bearing inspection in Section 6A
Connecting rod installation in
Section 6A
Previously outlined
Previously outlined
Crankshaft and bearing
inspection in Section 6A
Crankshaft and bearing
inspection in Section 6A
Crankshaft inspection in
Section 6A
Crankshaft thrust play inspection
in Section 6A