2001 SUZUKI GRAND VITARA ignition system

6E2-26 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
INSTALLATION
For installation, reverse removal procedure and note the follow-
ings.
•Use new O-ring.
•Apply thin coat of gasoline to O-ring to facilitate installation.
•Tighten fuel pressure regulator (1) bolts to specified torque.
Tightening torque
Fuel pressure regulator bolt
(a) : 10 N·m (1.0 kg-m, 7.5 lb-ft)
•With engine “OFF” and ignition switch “ON”, check for fuel
leaks around fuel line connection.
Fuel injector
ON-VEHICLE INSPECTION
1) Using sound scope (1) or such, check operating sound of
injector when engine is running or cranking.
Cycle of operating sound should vary according to engine
speed.
If no sound or an unusual sound is heard, check injector cir-
cuit (wire or coupler) or injector.
2) Disconnect connector from injector, connect ohmmeter
between terminals of injector and check resistance.
If resistance is out of specification, replace.
Fuel injector resistance:
14.2 – 14.8 Ω
Ω Ω Ω (at 20°C, 68°F)
3) Connect connector to injector securely.

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.

6E2-32 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
Mass air flow sensor (MAF sensor)
INSPECTION
1) Connect voltmeter (1) to “B+” terminal of MAF sensor (2)
coupler disconnected and ground (3).
2) Turn ignition switch ON and check that voltage is battery volt-
age.If not, check if wire harness is open or connection is
poor.
3) Turn ignition switch OFF and remove ECM/PCM cover (1)
from bracket.
4) Connect MAF sensor coupler to MAF sensor.
5) Turn ignition switch ON and check voltage at MAF sensor
output terminal of ECM/PCM connector (1).
MAF sensor output voltage
Voltage: 1.0 - 1.6 V
6) Start engine and check that voltage is lower than 5 V and it
rises as engine speed increases.
(Reference data: 1.7 – 2.0 V at specified idle speed)
If check result is not as specified above, cause may lie in
wire harness, coupler connection, MAF sensor or ECM/
PCM. NOTE:
Use voltmeter with high-impedance (10 kΩ
ΩΩ Ω/V minimum)
or digital type voltmeter.

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

6E2-44 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
Emission Control System
EGR system (if equipped)
EGR SYSTEM INSPECTION (USING SUZUKI SCAN TOOL)
1) Connect SUZUKI scan tool to data link connector (DLC) (1)
with ignition switch OFF.
Special tool
(A) : SUZUKI scan tool
2) Start engine and warm up it to normal operating tempera-
ture.
3) With engine idling (without depressing accelerator pedal),
open EGR valve by using “MISC. TEST” mode.
In this state, according as EGR valve opening increases
engine idle speed drops. If not, possible cause is clogged
EGR gas passage, stuck or faulty EGR valve.
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Disconnect EGR valve coupler.
3) Remove wire harness bracket from intake collector.
4) Remove EGR valve (5) and gasket from intake collector.NOTE:
For operation procedure of cartridge, refer to its car-
tridge operator's manual.
1. SUZUKI scan tool display
2. EGR valve opening (0: Close, 100: Full Open)
1. EVAP canister purge valve 4. EGR pipe
2. EVAP canister purge valve hose 6. PCV hose
3. Breather hose

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