Heater SUZUKI SWIFT 2000 1.G SF310 Service User Guide

ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-37
CONNECTOR “C03”
TER-
MINALWIRE
COLORCIRCUITSTANDARD
VOLTAGECONDITION
1V/WData link connector
(SUZUKI serial data line)4 – 6 VIgnition switch ON
BlVehicle speed sensor (+) (A / T)0.4 – 0.8 VIgnition switch ON
2Y/GVehicle 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
3GTransmis-
sion range
“2” rangeIgnition switch ON, Selector lever at “2”
range
4Or / Y
sion range
sensor
(switch)
“N” range10 – 14 VIgnition switch ON, Selector lever at “N”
range
5Or / B
(switch)
(A / T only).“P” rangeIgnition switch ON, Selector lever at “P”
range
6—Blank–—
7—Blank–—
8RHeated oxygen sensor-2Refer to DTC flow chart
9————
015VIgnition switch ON fuel tank fully filled10Y/RFuel level sensor (gauge)0 – 1.5 VIgnition switch ON, fuel tank fully filled10Y/RFuel level sensor (gauge)355VIgnition switch ON fuel tank emptied3 – 5.5 VIgnition switch ON, fuel tank emptied
11—Blank——
12R/GData link connector
(OBD serial data line)10 – 14 VIgnition switch ON
13PVehicle speed sensor (–) (A / T)0.4 – 0.8 VIgnition switch ON
14G/BlTransmis-
sion range
“L” rangeSelector lever at “L”
range
15G/R
sion range
sensor
(switch)
“D” range10 – 14 VIgnition
switch ONSelector lever at “D”
range
16R
(switch)
(A / T)“R” rangeSelector lever at “R”
range
17Lg/RA / C ON (output) signal for A / C
controller (if equipped)
0 – 1 VWhile engine running and A / C not
operating
gcontroller (if equipped)10 – 14 VWhile engine running and A / C operating
18Br / YElectric load signal
0 –1 V
Ignition switch ON
Headlight, small light, heater fan and
rear window defogger turned OFF
18Br / YElectric load signal
10 – 14 V
Ignition switch ON
Headlight, small light, heater fan and
rear window defogger turned ON
19Bl / RA / C (input) signal for A / C
amplifier
10 – 14 VWhile engine running and A / C not
operating
amplifier0 – 0.6 VWhile engine running and A / C operating
20B/WIgnition switch10 – 14 VIgnition switch ON
21—Blank——
22—Blank——

6-38 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
1 2
1. ECM (PCM)
coupler disconnected
2. Ohmmeter
RESISTANCE CHECK
1) Disconnect ECM (PCM) couplers from ECM (PCM) with ignition
switch OFF.
CAUTION:
Never touch terminals of ECM (PCM) itself or connect
voltmeter or ohmmeter.
2) Check resistance between each terminal of couplers discon-
nected.
CAUTION:

Be sure to connect ohmmeter probe from wire harness
side of coupler.

Be sure to turn OFF ignition switch for this check.

Resistance in table below represents that when parts
temperature is 20C (68F).
TERMINALSCIRCUITSTANDARD RESISTANCE
C01-8 to C03-20H02S-1 heater11.7 – 14.3 Ω
C02-19 to C03-20H02S-2 heater11.7 – 14.3 Ω
C02-12 to C02-2 / 15Fuel injector2.4 – 3.6 Ω
C02-7 to C02-2 / 15EVAP canister purge valve30 – 34 Ω
C02-21 to C03-20Fuel pump relay100 – 120 Ω
C02-16 to C02-2 / 15ISC actuator relay100 – 120 Ω
C02-25 to C02-2 / 15EFE heater relay100 – 120 Ω
C02-8 to Body groundShift solenoid-B8 – 20 Ω
C02-9 to Body groundShift solenoid-A8 – 20 Ω
C02-20 to C02-2 / 15Radiator fan control relay100 – 120 Ω
C02-22 to C02-14Main relay100 – 120 Ω
C02-1 to Body groundGroundContinuity
C02-13 to Body groundGroundContinuity
C02-26 to Body groundGroundContinuity

ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-39
INFORMATION SENSORS
-1. MAP sensor
-2. TP sensor
-3. IAT sensor
-4. ECT sensor
-5. Heated oxygen sensor-1
-6. VSS
-7. Ignition coil
-8. Battery
-9. CMP sensor (in Distributor)
-10. A/C contoller (if equipped)
-11. CKP sensor
-12. CTP switch (in ISC actuator)
-13. Heated oxygen sensor-2OTHERS
A: ECM (PCM)
B: Main relay
C: EVAP canister
D: Injector resistor
E: EFE heater
F: Electric load diode CONTROL DEVICES
a: Fuel injector
b: EVAP canister purge valve
c: Fuel pump relay
d: Malfunction indicator lamp
e: ISC actuator
f: Radiator fan control relay
g: Igniter
h: EFE heater relay
i: ISC actuator relay
COMPONENT LOCATION

To generatorTo other sensor
Main
fuse
Ignition switch
Heater
6-54 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
DTC P0130 HEATED OXYGEN SENSOR (HO2S) CIRCUIT MALFUNCTION
(SENSOR-1)
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE

When running at idle speed after engine warmed up
and running at specified vehicle speed, HO2S-1
output voltage does not go below 0.3 V or over
0.6 V.
2 driving cycle detection logic, Monitoring once / 1
driving.
Heated oxygen sensor-1 malfunction

“G” or “R” circuit open (poor connection) or short
DTC CONFIRMATION PROCEDURE
WARNING:

When performing a road test, select a place where there is no traffic or possibility of a traffic accident
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.
1) Turn ignition switch OFF. Clear DTC with ignition switch ON, check vehicle and environmental condition for:
–Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
–Ambient temp.: –10C, 14F or higher
–Intake air temp.: 70C, 158F or lower
2) Warm up engine to normal operating temperature.
3) Drive vehicle at 30 – 40 mph, 50 – 60 km / h for 2 min.
4) Stop vehicle and run engine at idle for 2 min.
5) Check DTC in “DTC” mode and pending DTC in “ON BOARD TEST” or “PENDING DTC” mode.

To generatorTo other sensor
Heater Ignition
switch Main
fuse
“IG COIL METER”
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-57
DTC P0135 HEATED OXYGEN SENSOR (HO2S) HEATER CIRCUIT
MALFUNCTION (SENSOR-1)
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE
DTC will set when A or B condition is met.
A:

Low voltage at terminal C01-8 when engine is
running at high load.
B:

High voltage at terminal C01-8 when engine is
running under condition other than above.
2 driving cycle detection logic, Continuous
monitoring.
HO2S-1 heater circuit open or shorted to ground

ECM (PCM) malfunction
DTC CONFIRMATION PROCEDURE
WARNING:

When performing a road test, select a place where there is no traffic or possibility of a traffic accident
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.
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON, start engine and keep it at idle for 1 min.
3) Start vehicle and depress accelerator pedal fully for 5 sec. or longer.
4) Stop vehicle.
5) Check DTC in “DTC” mode and pending DTC in “ON BOARD TEST” or “PENDING DTC” mode.

6-58 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
Fig. 1 for Step 2 Fig. 2 for Step 3
C01-8
INSPECTION
STEPACTIONYESNO
1Was “ENGINE DIAG. FLOW TABLE” performed?Go to Step 2.Go to “ENGINE DIAG.
FLOW TABLE”.
2Check Heater for Operation.
1) Check voltage at terminal C01-8. See Fig. 1.
2) Warm up engine to normal operating temperature.
3) Stop engine.
4) Turn ignition switch ON and Check voltage atIntermittent trouble
Check for intermittent
referring to
“Intermittent and
Poor Connection”Go to Step 3.
terminal C01-8. See Fig. 1. Voltage should be
over 10 V.
5) Start engine, run it at idle and check voltage at the
same terminal. Voltage should be below 1.9 V.
Are check results are specified?in Section 0A.
3Check Heater of Sensor-1.
1) Disconnect HO2S-1 coupler with ignition switch
OFF.
2) Check for proper connection to HO2S-1 at “B/W”
and “P/B” wire terminals.
3) If OK, then check heater resistance. See Fig. 2.
Is it 11.7 – 14.3 Ω at 20C, 68F?“P/B” wire open or
shorted to ground or
poor connection at
C01-8. If wire and
connection are OK,
substitute a
known-good ECM
(PCM) and recheck.Replace HO2S-1.

To other sensor
Heater Ignition
switch Main
fuse
“IG COIL METER”
To ignition coilTo other sensor
ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-59
DTC P0136 HEATED OXYGEN SENSOR (HO2S) CIRCUIT MALFUNCTION
(SENSOR-2)
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE
DTC will set when A or B condition is detected.
A. Max. output voltage of HO2S-2 is lower than specified value or
Min. output voltage is higher than specified value while vehicle
driving.
B. Engine is warmed up and HO2S-2 voltage is 4.5 V or more.
(circuit open)
2 driving cycle detection logic, monitoring once / 1 driving.
Exhaust gas leakage

“G” or “R” circuit open or short

Heated oxygen sensor-2 malfunction

Fuel system malfunction

6-62 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
To other sensor
Heater Ignition
switch Main
fuse
“IG COIL METER”
To ignition coilTo other sensor
DTC P0141 HEATED OXYGEN SENSOR (HO2S) HEATER CIRCUIT
MALFUNCTION (SENSOR-2)
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE
DTC will set when A or B condition it met.
A. Low voltage at terminal C02-19 for specified time after engine
start or while engine running at high load.
B. High voltage at terminal C02-19 while engine running under
other than above condition.
2 driving cycle detection logic, continuous monitoring.
HO2S-2 heater circuit open or shorted
to ground

ECM (PCM) malfunction
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF once and then ON.
2) Clear DTC, start engine and warm up engine to normal operating temperature.
3) Keep it at 2000 r / min for 2 min.
4) Check pending DTC in “ON BOARD TEST” or “PENDING DTC” mode and DTC in “DTC” mode.

ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-63
Fig. 1 for Step 2
INSPECTION
STEPACTIONYESNO
1Was “ENGINE DIAG. FLOW TABLE” performed?Go to Step 2.Go to “ENGINE DIAG.
FLOW TABLE”.
2Check HO2S-2 Heater and Its Circuit.
1) Warm up engine to normal operating temperature.
2) Stop engine.
3) Turn ignition switch ON and check voltage at
terminal C02-19 See Fig. 1. Voltage should be
over 10 V.
4) Start engine, run it at idle and check voltage at the
same terminal after 1 min. from engine start.
Voltage should be below 1.9 V.
Are check result as specified?Intermittent trouble.
Check for intermittent
referring to
“Intermittent and
Poor Connection”
in Section 0A.Go to Step 3.
3Check Heater or Sensor-2.
1) Disconnect HO2S-2 coupler with ignition switch
OFF.
2) Check for proper connection to HO2S-2 at “B/W”
and “Lg / B” wire terminals.
3) If OK, then check heater resistance.
Is it 11.7 – 14.3 Ω at 20C, 68F?“Lg / B” wire open or
shorted to ground or
poor connection at
C02-19. If wire and
connection are OK,
substitute a known-
good ECM (PCM)
and recheck.Replace HO2S-2.

Main
fuseMain relay
EFE heater EFE heater relay
6-90 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
DTC P1250 EARLY FUEL EVAPORATION (EFE) HEATER CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
DTC DETECTING CONDITIONPOSSIBLE CAUSE

Voltage low at terminal C01-12 during engine
warming up
or

Voltage high at terminal C01-12 after engine
warming up
2 driving cycle detection logic, continuous
monitoring
“Y/R”, “W” or “W/B” circuit open or short

EFE heater relay malfunction

EFE heater malfunction

ECM (PCM) malfunction
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON.
3) Check vehicle and environmental condition for:
–Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
–Ambient temp: –10C, 14F or higher
–Intake air temp: 70C, 158F or lower
4) Start cool engine and warm it up to normal operating temperature.
5) Check pending DTC in “ON BOARD TEST” or “PENDING DTC” mode and DTC in “DTC” mode.