2000 SUZUKI SWIFT sensor pressure

6-1-94 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
Fig. 1 for Step 1
When using SUZUKI scan tool:
DTC P1450 BAROMETRIC PRESSURE SENSOR LOW / HIGH INPUT
DTC P1451 BAROMETRIC PRESSURE SENSOR PERFORMANCE PROBLEM
WIRING DIAGRAM / CIRCUIT DESCRIPTION
Barometric pressure sensor is installed in ECM (PCM).
DTC DETECTING CONDITION
POSSIBLE CAUSE
DTC P1450:

Barometric pressure: 136 kPa 1025 mmHg or higher, or
33 kPa 250 mmHg or lower
ECM (PCM) (barometric pressure sensor)
malfunction
DTC P1451:

Vehicle stopped

Engine cranking

Difference between barometric pressure and intake
manifold absolute pressure is 26 kPa, 200 mmHg or more
2 driving cycle detection logic, monitoring once / 1 driving.
Manifold absolute pressure sensor and its
circuit malfunction

ECM (PCM) (barometric pressure sensor)
malfunction
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON.
3) Turn ignition switch ON for 2 sec., crank engine for 2 sec. and run it at idle for 1 min.
4) Check pending DTC in “ON BOARD TEST” or “PENDING DTC” mode and DTC in “DTC” mode.
INSPECTION
DTC P1450:
Substitute a known-good ECM (PCM) and recheck.
DTC P1451:
NOTE:
Note that atmospheric pressure varies depending on weather conditions as well as altitude.
Take that into consideration when performing these check.
STEP
ACTIONYESNO
11) Connect scan tool to DLC with ignition switch OFF.
2) Turn ignition switch ON and select “DATA
LIST” mode on scan tool.
3) Check manifold absolute pressure. See Fig. 1.
Is it barometric pressure (approx. 100 kPa,
760 mmHg) at sea level?Substitute a known-
good ECM (PCM) and
recheck.Go to Step 2.

Applying Vacuum Displayed Value on Scan Tool
0Barometric pressure
(Approx. 100 kPa, 760 mmHg)
27 kPa
200 mmHgBarometric pressure –27 kPa
(Approx. 73 kPa, 560 mmHg
67 kPa
500 mmHgBarometric pressure –67 kPa
(Approx. 33 kPa, 260 mmHg)
ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-95
Fig. 2 for Step 2
STEPACTIONYESNO
2Check MAP Sensor
1) Remove MAP sensor from intake manifold and connect
vacuum pump gauge to MAP sensor. See Fig. 2.
2) Connect scan tool to DLC and turn ignition switch ON.
3) Check intake manifold absolute pressure displayed on
scan tool under following conditions.
Is check result satisfactory?Check air intake
system for air
being drawn in
and engine
compression.
If OK, then
substitute a
known-good ECM
(PCM) and
recheck.Replace MAP
sensor.

3 / 4 turn
ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-3
3) Install special tool (Oil pressure gauge) to vacated threaded
hole.
Special Tool
(A): 09915-77311
(B): 09915-78211
NOTE:
At this time, be very careful not to exert force to where
heated oxygen sensor and its lead wire are connected.
4) Reinstall oil filter.
5) Start engine and warm it up to normal operating temperature.
6) After warming up, raise engine speed to 4,000 r / min and mea-
sure oil pressure.
Oil pressure specifications: 270 – 370 kPa
(2.7 – 3.7 kg / cm
2,
38.4 – 52.6 psi) at
4,000 r / min (rpm)
7) After checking oil pressure, stop engine and remove oil filter
and oil pressure gauge.
8) Before reinstalling oil pressure switch (1), be sure to wrap its
screw threads with a sealing tape and tighten switch to speci-
fied torque.
NOTE:
If sealing tape edge is bulged out from screw threads of
switch, cut it off.
Tightening Torque
(a): 14 N
.m (1.4 kg-m, 10.5 lb-ft)
9) After oiling oil filter “O” ring (rubber gasket), screw oil filter on
oil filter stand by hand until filter “O” ring contacts mounting sur-
face.
CAUTION:
To tighten oil filter properly, it is important to accurately
identify the position where filter “O” ring first contacts
mounting surface.
10) Tighten filter (1) 3 / 4 (270) turn from the point of contact with
mounting surface using an oil filter wrench.
Special Tool
(C): 09915-47310
CAUTION:
To prevent oil leakage, make sure that oil filter is tight,
but do not overtighten it.
11) After installing oil filter, start engine and check oil filter for oil
leakage.

1. Throttle body
1. Throttle body
2. ISC actuator
5. Clamp
6A-6 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
4) Remove air cleaner assembly.
5) Disconnect the following electric lead wires:

EGR valve

ISC actuator (2)

Ground wires from intake manifold

Fuel injector (4)

TP sensor (3)

EFE heater (5)

Engine coolant temp. gauge
6) Disconnect fuel return (4) and feed hoses (3) from fuel pipes.
7) Disconnect coolant hoses from intake manifold.
8) Disconnect the following vacuum hoses.

Canister purge hose from intake manifold.

EGR pressure transducer hoses from EGR valve.

EGR valve hose from EGR valve.

Pressure sensor hose from intake manifold.

Brake booster hose from intake manifold.
9) Disconnect breather hose from PCV valve.
10) Disconnect accelerator cable from throttle body.
11) Disconnect other connected to throttle body and intake man-
ifold, if any.
12) Remove intake manifold with throttle body from cylinder head.
13) Remove throttle body from intake manifold.

6A-24 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
UNIT REPAIR OVERHAUL
ENGINE ASSEMBLY
REMOVAL
1) Relieve fuel pressure according to procedure described in
“FUEL PRESSURE RELIEF PROCEDURE” of Section 6.
2) Remove engine hood after disconnecting front window washer
hose.
3) Disconnect battery cables at battery and remove battery and
its tray.
4) Drain cooling system.
5) Remove air cleaner assembly.
6) Remove radiator with cooling fan. Refer to Section 6B for re-
moval.
7) Disconnect the following electric wire harness.

High-tension cord from ignition coil

Distributor

EGR valve

ECT sensor

ISC actuator

Ground wire harness from intake manifold

TP sensor

Fuel injector

Oil pressure gauge

A / C compressor pressure switch (if equipped)

Heated oxygen sensor

Generator

Starter

Back-up light switch (For M / T model)

Battery negative cable from transmission

Shift switch of A / T (For A / T model)

Direct clutch and 2nd brake solenoids of A / T (For A / T model)

Vehicle speed sensor on A / T (For A / T model)
And release above wire harness from clamps.
8) Disconnect the following vacuum hose.

Brake booster hose from intake manifold.

Canister purge hose from EVAP canister purge valve.

Pressure sensor hose from intake manifold.
9) Disconnect fuel return hose and fuel feed hose from fuel feed
and return pipes.
10) Disconnect heater inlet and outlet hoses.

1. Intake manifold
2. Throttle body
3. Gasket
4. EGR valve
5. Fuel delivery pipe
6. Fuel injector7. Fuel pressure regulator
8. EVAP canister purge valve
9. MAP sensor
10. O-ring
11. Gasket
12. Cushion : Tightening Torque
: Do not reuse
1
2
6A1-14 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
THROTTLE BODY AND INTAKE MANIFOLD
REMOVAL
1) Relieve fuel pressure according to procedure described in Sec-
tion 6.
2) Disconnect negative cable at battery.
3) Drain cooling system.
WARNING:
To help avoid danger of being burned, do not remove
drain plug (2) and radiator cap while engine and radiator
(1) are still hot. Scalding fluid and steam can be blown out
under pressure if plug and cap are taken off too soon.
4) Disconnect IAT sensor at coupler.
5) Remove air cleaner outlet hose (2) with resonator.
6) Disconnect accelerator cable (1) from throttle body.

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-15
7) Disconnect the following electric lead wires and release clamp:

Ground wires (5) from intake manifold

TP sensor (3)

IAC valve (4)

Fuel injectors

EVAP canister purge valve (2)

MAP sensor (6)

EGR valve (1)
8) Disconnect the following hoses:

Brake booster hose (1) from intake manifold

Canister purge hose (3) from EVAP canister purge valve

Engine cooling water (coolant) hose (2) from IAC valve

PCV hose (4)

Breather hose from cylinder head
9) Disconnect fuel feed hose (2) from pipe (1), and disconnect fuel
return hose (3) from fuel pressure regulator.

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-65
12) Disconnect the following electric wires:

Ignition coil assembly

Ground wires from intake manifold

Engine oil pressure switch

EVAP canister purge valve (if equipped)

Engine coolant temp. sensor

Fuel injectors

Power steering pressure switch (if equipped)

Oxygen sensor-1

Back-up light switch (M / T)

Transmission range switch (A / T)

A/T vehicle speed sensor (A / T)

Solenoid coupler (A / T)

Generator

Starter

Battery negative cable from transmission

TP sensor

IAC valve

CMP sensor

MAP sensor
and then release wire harnesses from clamps.
13) Disconnect the following hoses:

Canister purge hose (2) from EVAP canister purge valve

Brake booster hose (1) from intake manifold

Radiator outlet hose from inlet pipe

Heater inlet and outlet hose from heater unit
14) Disconnect fuel feed (2) and return hoses (3) from fuel delivery
pipe (1).