2000 SUZUKI SWIFT Intake Manifold

6-108 ENGINE GENERAL INFORMATION AND DIAGNOSIS
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.
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 and recheck.
DTC P1451 :
DTC DETECTING CONDITION POSSIBLE CAUSE
DTC P1450 :
Barometric pressure : Sensor voltage is 4.7 V or higher, or
1.6 V or lowerECM (barometric pressure sensor) malfunc-
tion
DTC P1451 :
Vehicle stopped
Engine cranking
Difference between barometric pressure and intake mani-
fold absolute pressure is 26 kPa, 200 mmHg or more
Difference between intake manifold absolute pressure at
engine start and the pressure after engine start is 1.3 kPa,
10 mmHg or less.
✱2 driving cycle detection logic, monitoring once/1 driving.Manifold absolute pressure sensor and its
circuit malfunction
ECM (barometric pressure sensor) malfunc-
tion
NOTE:
Note that atmospheric pressure varies depending on weather conditions as well as altitude.
Take that into consideration when performing these check.
Step Action Yes No
1 Check Barometric Pressure Valve.
1) 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 and recheck.Go to Step 2.

ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-109
Table 1
Fig. 1 for Step 1
Fig. 2 for Step 22 Check 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 for specified valve.
See Table 1.
Is check result satisfactory?Check air intake system
for air being drawn in and
engine compression.
If OK, then substitute a
known-good ECM and
recheck.Replace MAP sensor. Step Action Yes No
Applying Vacuum Displayed Value on Scan Tool
0 Barometric 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 MECHANICAL (M13 ENGINE) 6A1-1
6F1
6A1
6G
6H
6K
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10B
SECTION 6A1
ENGINE MECHANICAL (M13 ENGINE)
CONTENTS
GENERAL DESCRIPTION .............................6A1-2
ENGINE ...................................................... 6A1-2
ENGINE LUBRICATION ............................. 6A1-3
DIAGNOSIS ....................................................6A1-4
DIAGNOSIS TABLE .................................... 6A1-4
COMPRESSION CHECK ............................ 6A1-4
ENGINE VACUUM CHECK ........................ 6A1-6
OIL PRESSURE CHECK ............................ 6A1-7
VALVE LASH (CLEARANCE) ..................... 6A1-9
ON-VEHICLE SERVICE ...............................6A1-12
AIR CLEANER ELEMENT ........................ 6A1-12
AIR CLEANER ASSEMBLY AND
RESONATOR ........................................... 6A1-13
KNOCK SENSOR ..................................... 6A1-13
CYLINDER HEAD COVER ....................... 6A1-13
THROTTLE BODY AND INTAKE
MANIFOLD ................................................ 6A1-16
EXHAUST MANIFOLD .............................. 6A1-19OIL PAN AND OIL PUMP STRAINER ...... 6A1-21
TIMING CHAIN COVER ........................... 6A1-25
OIL PUMP ................................................. 6A1-30
TIMING CHAIN AND CHAIN
TENSIONER ............................................. 6A1-34
CAMSHAFT, TAPPET AND SHIM............ 6A1-39
VALVES AND CYLINDER HEAD ............. 6A1-44
PISTONS, PISTON RINGS,
CONNECTING RODS AND
CYLINDERS ............................................. 6A1-57
ENGINE MOUNTINGS ............................. 6A1-67
UNIT REPAIR OVERHAUL .......................... 6A1-68
ENGINE ASSEMBLY ................................ 6A1-68
MAIN BEARINGS, CRANKSHAFT AND
CYLINDER BLOCK................................... 6A1-73
REQUIRED SERVICE MATERIAL............... 6A1-85
TIGHTENING TORQUE SPECIFICATION... 6A1-86
SPECIAL TOOL ........................................... 6A1-87

WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System :
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).

6A1-6 ENGINE MECHANICAL (M13 ENGINE)
13) After checking, install spark plugs and ignition coil assem-
blies (1) with high-tension cord (2).
14) Connect ignition coil couplers (3).
15) Connect fuel injector wires(4) at the coupler.
16) Check cylinder head upper cover gasket for deterioration
and then install it into groove of cylinder head upper cover
(1) securely.
17) Install cylinder head upper cover with gasket on to cylinder
head cover.
18) Install air cleaner assembly, resonator and hoses referring to
“AIR CLEANER ASSEMBLY AND RESONATOR”.
ENGINE VACUUM CHECK
The engine vacuum that develops in the intake line is a good indi-
cator of the condition of the engine. The vacuum checking proce-
dure is as follows :
1) Warm up engine to normal operating temperature.
2) Stop engine and turn off the all electric switches.
3) Remove cap (1) from intake manifold.
NOTE:
After warming up engine, be sure to place transmission
gear shift lever in “Neutral” (shift selector lever to “P”
range for A/T model), and set parking brake and block
drive wheels.

ENGINE MECHANICAL (M13 ENGINE) 6A1-7
4) Connect special tool (Vacuum gauge) to intake manifold.
Special tool
(A) : 09915-67310
5) Run engine at specified idle speed and read vacuum gauge.
Vacuum should be within specification.
Vacuum specification (at sea level)
: 59 – 73 kPa (45 – 55 cmHg, 17.7 – 21.6 inHg)
at specified idle speed
6) After checking, disconnect special tool (Vacuum gauge) from
intake manifold.
7) Install cap to intake manifold.
OIL PRESSURE CHECK
Oil level in oil pan
If oil level is low, add oil up to Full level mark (hole) on oil
level gauge.
Oil quality
If oil is discolored, or deteriorated, change it.
For particular oil to be used referring to the table in Section
0B.
Oil leaks
If leak is found, repair it.
1) Disconnect oil pressure switch coupler (1) and remove oil
pressure switch (2) from cylinder block.
NOTE:
Prior to checking oil pressure, check the following items.
1. Full level mark (hole)
2. Low level mark (hole)

6A1-16 ENGINE MECHANICAL (M13 ENGINE)
THROTTLE BODY AND INTAKE MANIFOLD
REMOVAL
1) Relieve fuel pressure according to fuel pressure relief proce-
dure described in Section 6.
2) Disconnect negative cable at battery.
3) Drain coolant by loosening drain plug (1).
1. Intake manifold 7. EVAP canister purge valve 13. Intake manifold mounting bolt (short) 19. Cushion
2. Intake manifold gasket 8. TP sensor 14. Intake manifold mounting bolt (long) 20. Fuel delivery pipe mounting bolt
3. Throttle body 9. IAC valve 15. EGR pipe gasket Tightening torque
4. Gasket 10. Fuel delivery pipe 16. O-Ring Do not reuse.
5. EGR pipe 11. Intake manifold stiffener 17. Grommet
6. MAP sensor 12. Intake manifold mounting nut 18. Injector assembly
WARNING:
To help avoid danger of being burned, do not remove
drain plug (1) and radiator cap while engine and radiator
are still hot. Scalding fluid and steam can be blown out
under pressure if plug and cap are taken off too soon.

ENGINE MECHANICAL (M13 ENGINE) 6A1-17
4) Remove air cleaner assembly, resonator and hoses by refer-
ring to “AIR CLEANER ASSEMBLY AND RESONATOR”.
5) Disconnect the following electric lead wires :
IAC valve (1)
TP sensor (2)
EVAP canister purge valve (3)
MAP sensor (4)
Fuel injector wire harness at couplers (5)
Each wire harness clamps
6) Disconnect accelerator cable from throttle body.
7) Disconnect the following hoses :
Brake booster hose (1) from intake manifold
PCV hose (2) from PCV valve
Canister purge hose (3) from EVAP canister purge valve
Water hoses (4) from throttle body and thermostat case
Fuel feed hose (5) from fuel delivery pipe
8) Remove fuel delivery pipe with fuel injectors from cylinder
head.
9) Disconnect EGR pipe (6) from EGR valve.
10) Remove intake manifold stiffener (1).

6A1-18 ENGINE MECHANICAL (M13 ENGINE)
11) Remove intake manifold (1) with throttle body (2) and EGR
pipe (3) from cylinder head, and then its gasket.
INSTALLATION
Reverse removal procedure for installation noting the followings.
Use new intake manifold gasket and EGR pipe gasket.
Tighten bolts (1) and nuts (2) to specified torque.
Tightening torque
Intake manifold bolts and nuts
(a) : 25 N·m (2.5 kg-m, 18.0 lb-ft)
Check to ensure that all removed parts are back in place.
Reinstall any necessary parts which have not been rein-
stalled.
Adjust accelerator cable play referring in Section 6E1.
Refill cooling system referring in Section 6B.
Upon completion of installation, turn ignition switch ON but
engine OFF and check for fuel leaks.
Finally, start engine and check for engine coolant leaks.