Section 8a SUZUKI GRAND VITARA 2001 2.G Owners Manual

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-25
REMOVAL
Remove fuel tank from body according to procedure described in
Section 6C and remove fuel pump from fuel tank.
INSPECTION
Check fuel pump filter for evidence of dirt and contamination. If
present, clean and check for presence of dirt in fuel tank.
INSTALLATION
Install fuel pump to fuel tank and then install fuel tank to body
according to procedure described in “Section 6C”.
Fuel pressure regulator
REMOVAL
1) Relieve fuel pressure in fuel feed line referring to “FUEL
PRESSURE RELIEF PROCEDURE” in Section 6-1.
2) Disconnect negative (–) cable from battery.
3) Disconnect vacuum hose (1) from fuel pressure regulator.
4) Remove fuel pressure regulator (1) from fuel delivery pipe
(3).
5) Disconnect fuel return hose (2) from fuel pressure regulator.
CAUTION:
A small amount of fuel may be released when it is from
delivery pipe.
Place a shop cloth under delivery pipe so that released
fuel is absorbed in it.
CAUTION:
A small amount of fuel may be released when hose is dis-
connected. Cover hose to be disconnected with a shop
cloth.

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-27
REMOVAL
1) Relieve fuel pressure in fuel feed line referring to “FUEL
PRESSURE RELIEF PROCEDURE” in Section 6-1.
2) Remove throttle body intake collector, refer to “THROTTLE
BODY” in this section.
3) Disconnect fuel feed hose (1) and fuel return hose (2).
4) Disconnect vacuum hose (4) and fuel return hose from fuel
pressure regulator (5).
5) Remove fuel feed pipe (8) and fuel connect pipe (7) from
delivery pipes (6) (right and left).
6) Disconnect connector (3) from each injector.
7) Remove delivery pipes (1) (right and left) from intake mani-
fold.
8) Remove fuel injector(s).
INSPECTION
CAUTION:
A small amount of fuel may be released when it is from
delivery pipe.
Place a shop cloth under delivery pipe so that released
fuel is absorbed in it.
WARNING:
As fuel is injected in this inspection, perform in a well
ventilated area and away from open flames.
Use special care to prevent sparking when connecting
and disconnecting test lead to and from battery.

6E2-30 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
5) Install fuel connect pipe (1) and tighten union bolts to speci-
fied torque with new gaskets (3).
Tightening torque
Fuel connect pipe union bolt
(b) : 30 N·m (3.0 kg-m, 22.0 lb-ft)
6) Install fuel feed pipe (2) and tighten union bolt to specified
torque with new gaskets.
Tightening torque
Fuel feed pipe union bolt
(a) : 30 N·m (3.0 kg-m, 22.0 lb-ft)
7) Connect vacuum hose (5) and fuel return hose (4) to fuel
pressure regulator.
8) Connect fuel feed hose (1) and fuel return hose (2).
9) Connect connectors of injector wire (3) to injectors.
10) Install throttle body and intake collector, refer to “THROTTLE
BODY” in this section.
11) With engine “OFF” and ignition switch “ON”, check for fuel
leaks around fuel line connection.

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-31
Electronic Control System
Engine control module (ECM)/powertrain control
module (PCM)
REMOVAL
1) Disconnect negative (–) cable from battery.
2) Disable air bag system (if equipped) referring to “DIS-
ABLING THE AIR BAG SYSTEM” in Section 10B.
3) Remove ECM (PCM) cover (1) from bracket.
4) Disconnect connectors from ECM (PCM) (1).
5) Remove ECM (PCM) (1) with bracket (2).
INSTALLATION
1) Install ECM (PCM) with bracket to vehicle.
2) Connect connectors to ECM (PCM) securely.
3) Install ECM (PCM) cover to bracket.
4) Enable air bag system (if equipped) referring to “ENABLING
AIR BAG SYSTEM” in Section 10B.
5) Connect negative (–) cable to battery. CAUTION:
As ECM (PCM) consists of precision parts, be careful not
to expose it to excessive shock.

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-37
Heated oxygen sensor (sensor 1)
REMOVAL
1) Disconnect negative (–) cable from battery.
2) Disconnect coupler of oxygen sensor (s).
3) Remove oxygen sensor (s) from exhaust manifold (s).
INSTALLATION
Reverse removal procedure noting the followings.
•Tighten oxygen sensor (s) to specified torque.
Tightening torque
Heated oxygen sensor 1
(a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
•Connect connector of oxygen sensor (s) and clamp wire har-
ness securely.
•After installing oxygen sensor (s), start engine and check
that no exhaust gas leakage exists.
INSPECTION
Inspect HO2S-1 and its circuit referring to “DTC P0130 or P0150
Diag. Flow Table” in Section 6-1. If malfunction is found, replace. WARNING:
To avoid danger of being burned, do not touch exhaust
system when system is hot. Oxygen sensor removal
should be performed when system is cool.
NOTE:
Be careful not to expose it to excessive shock.
1. Left (No.1) bank oxygen sensor (sensor 1)

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-39
HEATER INSPECTION
Refer to “HEATED OXYGEN SENSOR (SENSOR 1) HEATER
INSPECTION”
Vehicle speed sensor (VSS)
ON-VEHICLE INSPECTION
1) Hoist vehicle.
2) Release parking brake lever, set transmission in neutral and
transfer in “2H”.
3) Remove ECM (PCM) cover.
4) Connector voltmeter between VSS terminal C51-3-1 of ECM
(PCM) connector and body ground.
5) Turn ignition switch ON and turn rear right tire slowly with
rear left tire locked.
Voltmeter should indicate deflection between 0 – 1 V and 8 –
14 V a few times while tire (1) is turned one revolution.
If check result is not satisfactory, proceed to flow table of
“DTC P0500” in Section 6-1.
REMOVAL, INSPECTION AND INSTALLATION
Refer to “VSS Removal, Inspection or Installation” in Section 7D.
Manifold absolute pressure sensor
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Disconnect connector from manifold absolute pressure sen-
sor.
3) Remove manifold absolute pressure sensor from intake
manifold.
[A]: Terminal arrangement of ECM (PCM) coupler
(viewed from harness side)
1. VSS

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-41
INSTALLATION
1) Confirm that vacuum passage on intake manifold is free from
clog.
2) Apply engine oil to O-ring of sensor.
3) Install sensor (1) to intake manifold (2).
4) Connect connector to sensor (1) securely.
Fuel level sensor (sender gauge)
Refer to Section 8C.
Crankshaft position sensor
REMOVAL AND INSTALLATION
Refer to Section 6A4.
INSPECTION
Refer to Section 6-1.
Main relay
INSPECTION
1) Disconnect negative (–) cable at battery.
2) Remove main relay (1) from its connector.
2. Fuel pump relay
3. Fuse box
4. Instrument panel
[A]: Left-hand steering vehicle
[B]: Right-hand steering vehicle

IGNITION SYSTEM (FOR H27 ENGINE) 6F2-1
6F2
SECTION 6F2
IGNITION SYSTEM (FOR H27 ENGINE)
CONTENTS
General Description ...................................... 6F2-2
Components ................................................ 6F2-2
System Wiring ............................................. 6F2-3
Diagnosis ....................................................... 6F2-4
Diagnostic Flow Table ................................. 6F2-4
Ignition Spark Check ................................... 6F2-6
Ignition Timing Check and Adjustment........ 6F2-6On-Vehicle Service ....................................... 6F2-8
Ignition Coil Assembly (Igniter and Ignition
Coil)............................................................. 6F2-8
Spark Plug .................................................. 6F2-8
CMP Sensor.............................................. 6F2-10
Noise Suppressor ..................................... 6F2-12
Special Tool ................................................. 6F2-13

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).

6F2-2 IGNITION SYSTEM (FOR H27 ENGINE)
General Description
The ignition system is a direct ignition system. It consists of the parts as described below and has an electronic
ignition control system.
•ECM (or PCM)
It detects the engine condition through the signals from the sensors, determines the most suitable ignition
timing and time for electricity to flow to the primary coil and sends a signal to the igniter (in ignition coil
assembly).
•Ignition coil assembly (including an igniter and an ignition coil)
The ignition coil assembly has a built-in igniter and ignition coil which turns ON and OFF the primary current
of the ignition coil according to the signal from ECM (or PCM). When the ignition coil primary current is
turned OFF, a high voltage is induced in the secondary wiring. One ignition coil is in charge of ignition of one
cylinder only.
•Spark plug and noise suppressor
•CMP sensor, TP sensor, ECT sensor, IAT sensor, VSS, knock sensor and MAF sensor
For their details, refer to Section 6E2.
This ignition system does not have a distributor and high-tension cords but each cylinder has an ignition coil
assembly (igniter and ignition coil) and the secondary voltage which occurred in the ignition coil is sent to the
spark plug directly. Also, the signal(s) are sent from the CMP sensor to ECM (or PCM) so as to control each igni-
tion coil independently through the igniter (in ignition coil assembly).
Components
NOTE:
For other components not found in this figure, refer to Section 6E2.
1. Ignition coil assembly (igniter and ignition coil)
2. CMP sensor
3. Noise suppressor
4. ECM (or PCM)
5. Spark plug

IGNITION SYSTEM (FOR H27 ENGINE) 6F2-3
System Wiring
NOTE:
For ECM (PCM) terminal assignment, refer to Section 6E2.
1. To ignition switch 8. Ignition coil assembly (For No.3 cylinder)
2.“IG COIL METER” fuse 9. Ignition coil assembly (For No.4 cylinder)
3. ECM (or PCM) 10. Spark plug
4. CMP sensor 11. Ignition coil assembly (For No.5 cylinder)
5. Noise suppressor 12. Ignition coil assembly (For No.6 cylinder)
6. Ignition coil assembly (For No.1 cylinder) 13. To main relay
7. Ignition coil assembly (For No.2 cylinder) 14. Sensed information