2000 SUZUKI SWIFT engine coolant

ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-91
1. Relay box
2.“PTC”
INSPECTION
STEPACTIONYESNO
1Was “ENGINE DIAG. FLOW TABLE” performed?Go to Step 2.Go to “ENGINE DIAG.
FLOW TABLE”.
2Check EFE Heater and Its Circuit.
Check for voltage at terminal C01-12 of ECM (PCM)
connector connected, under following each
condition.
During engine warming up (Coolant temp.:
Below 80C, 176F, Engine speed: Over 750 r / min):
Over 1.0 V
After warming up: Below 1.0 V
Is each voltage as specified?Intermittent trouble.
Check for intermittent
referring to
“Intermittent and Poor
Connection” in
Section 0A.Go to Step 3.
3Check EFE Heater Relay.
1) Turn OFF ignition switch and remove EFE heater
relay (“PTC”). See Fig. 2.
2) Check for proper connection to relay at terminal
3 and 4. See Fig. 3.
3) Check resistance between each two terminals.
Between terminals 1 and 2: Infinity
Between terminals 3 and 4: 100 – 120 Ω
4) Check that there is continuity between terminals
1 and 2 when battery is connected to terminals
3 and 4. See Fig. 4.
Is EFE heater relay in good condition?Go to Step 4.Replace EFE heater
relay.
4Check EFE Heater and Its Circuit.
1) Turn ignition switch OFF and disconnect ECM
(PCM) connectors.
2) Check for proper connection to ECM (PCM) at
terminals C02-25 and C01-12.
3) If OK, then measure resistance between terminal
C01-12 and ground.
Is it 0.5 – 30 Ω at 20C (68F)?“W”, “Y/R” or “W/B”
circuit open or short.
If wire and
connections are OK,
substitute a known-
good ECM (PCM) and
recheck.“W/B” circuit open or
short.
If wire and
connections are OK,
replace EFE heater.
Fig 1. for Step 4 Fig. 2 for Step 3 Fig. 3 for Step 3
Fig. 4 for Step 3

An Example of Freeze Frame Data
1. Trouble Code P0102 (1st)
2. Engine Speed 782 RPM
3. Eng Cool Tmp. 80C
4. Vehicle Spd. 0 km/h
5. MAP Sensor 39 kPa
6. St. Term FT1– 0.8% Lean
7. Lg. Term FT1– 1.6% Lean
8. Fuel 1 Stat. Closed Loop
9. Fuel 2 Stat. Not used
10. Load value 25.5%
1st, 2nd or 3rd in parentheses here represents which
position in the order the malfunction is detected.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-7
Warm-up Cycle
A warm-up cycle means sufficient vehicle operation such that the
coolant temperature has risen by at least 22C (40F) from engine
starting and reaches a minimum temperature of 70C (160F).
Driving Cycle
A “Driving Cycle” consists of engine startup and engine shutoff.
2 Driving Cycle Detection Logic
The malfunction detected in the first driving cycle is stored in ECM
(PCM) memory (in the form of pending DTC and freeze frame data)
but the malfunction indicator lamp does not light at this time. It lights
up at the second detection of same malfunction also in the next driv-
ing cycle.
Pending DTC
Pending DTC means a DTC detected and stored temporarily at 1
driving cycle of the DTC which is detected in the 2 driving cycle
detection logic.
Freeze Frame Data
ECM (PCM) stores the engine and driving conditions (in the from
of data as shown at the left) at the moment of the detection of a mal-
function in its memory. This data is called “Freeze frame data”.
Therefore, it is possible to know engine and driving conditions (e.g.,
whether the engine was warm or not, where the vehicle was running
or stopped, where air / fuel mixture was lean or rich) when a mal-
function was detected by checking the freeze frame data. Also,
ECM (PCM) has a function to store each freeze frame data for three
different malfunctions in the order as the malfunction is detected.
Utilizing this function, it is possible to know the order of malfunctions
that have been detected. Its use is helpful when rechecking or diag-
nosing a trouble.
Priority of freeze frame data:
ECM (PCM) has 4 frames where the freeze frame data can be
stored. The first frame stores the freeze frame data of the malfunc-
tion which was detected first. However, the freeze frame data
stored in this frame is updated according to the priority described
below. (If malfunction as described in the upper square “1” below
is detected while the freeze frame data in the lower square “2” has
been stored, the freeze frame data “2” will be updated by the freeze
frame data “1”.)
PRIORITY
FREEZE FRAME DATA IN FRAME 1
1
Freeze frame data at initial detection of malfunction
among misfire detected (P0300-P0304), fuel
system too lean (P0171) and fuel system too rich
(P0172)
2Freeze frame data when a malfunction other than
those in “1” above is detected

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-15
DIAGNOSTIC TROUBLE CODE (DTC) TABLE
NOTE:
1 driving cycle: MIL lights up when DTC is detected in the first driving cycle.
2 driving cycles: MIL lights up when the same DTC is detected also in the next driving cycle after DTC is
detected and stored temporarily in the first driving cycle.
DTC
NO.
DETECTING ITEMDETECTING CONDITION
(DTC will set when detecting:)MIL
P0105Manifold absolute pressure
circuit malfunction
Low pressure-high vacuum-low voltage (or MAP
sensor circuit shorted to ground)
High pressure-low vacuum-high voltage (or MAP
sensor circuit open)
1 driving
cycle
P0110Intake air temp. circuit
malfunctionIntake air temp. circuit low input
Intake air temp. circuit high input1 driving
cycle
P0115Engine coolant temp. circuit
malfunctionEngine coolant temp. circuit low input
Engine coolant temp. circuit high input1 driving
cycle
P0120Throttle position circuit
malfunctionThrottle position circuit low input
Throttle position circuit high input1 driving
cycle
P0121Throttle position circuit
performance problemPoor performance of TP sensor2 driving
cycles
P0130HO2S circuit malfunction
(Sensor-1)
Min. output voltage of HO2S-higher than
specification
Max. output voltage of HO2S-lower than
specification
2 driving
cycles
P0133HO2S circuit slow response
(Sensor-1)Response time of HO2S-1 output voltage between
rich and lean is longer than specification.2 driving
cycles
P0134HO2S circuit no activity detected
(Sensor-1)Output voltage of HO2S-1 fails to go specification.
(or HO2S-1 circuit open or short)2 driving
cycles
P0135HO2S heater circuit malfunction
(Sensor-1)Terminal voltage is lower than specification at heater
OFF or it is higher at heater ON.2 driving
cycles
P0136HO2S circuit malfunction
(Sensor-2)Max. voltage of HO2S-2 is lower than specification
or its min. voltage is higher than specification2 driving
cycles
P0141HO2S heater circuit malfunction
(Sensor-2)Terminal voltage is lower than specification at heater
OFF or it is higher at heater ON. (or heater circuit or
short)2 driving
cycles
P0171Fuel system too lean
Short term fuel trim or total fuel trim (short and long
terms added) is larger than specification for specified
time or longer. (fuel trim toward rich side is large.)2 driving
cycles
P0172Fuel system too rich
Short term fuel trim or total fuel trim (short and long
term added) is smaller than specification for
specified time or longer. (fuel trim toward lean side is
large.)
2 driving
cycles
P0300
P0301
P0302
P0303Random misfire detected
Cylinder 1 misfire detected
Cylinder 2 misfire detected
Cylinder 3 misfire detectedMisfire of such level as to cause damage to three
way catalyst
MIL
flashing
during
misfire
detection
P0304
y
Cylinder 4 misfire detectedMisfire of such level as to deteriorate emission but
not to cause damage to three way catalyst2 driving
cycles

6-1-18 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
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
malfunction

ECM (PCM) uses value determined by throttle
opening and engine speed.

ECM (PCM) stops EGR, EVAP purge and idle air
control.
P0110Intake air temp. circuit malfunctionECM (PCM) controls actuators assuming that
intake air temperature is 20C (68F).
P0115Engine coolant temp. circuit malfunctionECM (PCM) controls actuators assuming that
engine coolant temperature is 80C (176F).
P0120Throttle position circuit malfunctionECM (PCM) controls actuators assuming that
throttle opening is 20.
P0340Camshaft position sensor circuit
malfunctionECM (PCM) controls injection system sequential
injection to synchronous injection.
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).

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-19
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 6E2
Section 8
Section 6
Section 6H
Section 8 (Section 6 for pressure check)
Section 8
Section 8

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).