2001 SUZUKI GRAND VITARA Ignition switch

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-11
TERMINAL CIRCUIT TERMINAL CIRCUIT TERMINAL CIRCUIT
C51-3-1 Intake air temp. (IAT) sensor C51-3-13 Power source for TP sensor C51-3-25 Ground for IAT sensor, MAP sensor and
oxygen sensor (if equipped)
C51-3-2 Engine coolant temp. (ECT) sensor C51-3-14 Power source for MAP sensor (if
equipped)C51-3-26 Ground for CMP sensor
C51-3-3 Knock sensor C51-3-15 Power source
C51-3-4 Power source C51-3-16—
C51-3-5 Ground for MAF sensor C51-3-17 Ground
C51-3-6 Ground C51-3-18 Pressure switch in 4WD air pump
assembly
C51-3-7 4WD switch C51-3-19—
C51-3-8 Manifold absolute pressure (MAP)
sensor (if equipped)C51-3-20 Ignition switch
C51-3-9 Throttle position (TP) sensor C51-3-21 Heated oxygen sensor-1 (Bank2) (if
equipped)
C51-3-10 Mass air flow (MAF) sensor C51-3-22 Heated oxygen sensor-2 (Bank1) (if
equipped)
C51-3-11 Heated oxygen sensor-1 (Bank1) (if
equipped)C51-3-23 Heated oxygen sensor-2 (Bank2) (if
equipped)
C51-3-12 Ground for TP sensor C51-3-24 Ground for ECT sensor
TERMINAL CIRCUIT TERMINAL CIRCUIT TERMINAL CIRCUIT
C51-1-1 Shift solenoid-B (A/T) C51-1-13 CMP sensor C51-1-25 Power steering pressure switch
C51-1-2 Shift solenoid-A (A/T) C51-1-14 Vehicle speed sensor C51-1-26 4WD Low switch
C51-1-3—C51-1-15 EVAP canister purge valve C51-1-27 Transmission range switch “L” (A/T)
C51-1-4 IAC valve (stepper motor coil 2) C51-1-16 IAC valve (stepper motor coil 4) C51-1-28 Transmission range switch “2” (A/T)
C51-1-5 IAC valve (stepper motor coil 1) C51-1-17 IAC valve (stepper motor coil 3)
C51-1-6 Transmission range switch “R” (A/T) C51-1-18 Transmission range switch “D” (A/T)
C51-1-7 Transmission range switch “P” (A/T) C51-1-19 Transmission range switch “N” (A/T)
C51-1-8 TCC solenoid (A/T) C51-1-20 Shield wire ground for A/T output
speed sensor
C51-1-9 4WD air pump assembly C51-1-21 Shield wire ground for A/T input
speed sensor
C51-1-10 A/T input speed sensor (–) C51-1-22 A/T output speed sensor (–)
C51-1-11 A/T input speed sensor (+) C51-1-23 A/T output speed sensor (+)
C51-1-12 CMP sensor C51-1-24 Engine start signal
TERMINAL CIRCUIT TERMINAL CIRCUIT TERMINAL CIRCUIT
C51-2-1 Fuel injector No.2 C51-2-13 EGR valve (stepper motor coil 3) (if
equipped)C51-2-25 Ignition coil assembly for No.4
C51-2-2 Fuel injector No.1 C51-2-14 EGR valve (stepper motor coil 2) (if
equipped)C51-2-26 Ignition coil assembly for No.3
C51-2-3—C51-2-15 EGR valve (stepper motor coil 1) (if
equipped)C51-2-27 Ignition coil assembly for No.2
C51-2-4 Heater of HO2S-1 (Bank1) (if equipped) C51-2-16 Heater of HO2S-2 (Bank1) (if equipped) C51-2-28 Ignition coil assembly for No.1
C51-2-5 Heater of HO2S-1 (Bank2) (if equipped) C51-2-17 Heater of HO2S-2 (Bank2) (if equipped) C51-2-29—
C51-2-6—C51-2-18—C51-2-30 Ground for CKP sensor shield wire (if
equipped)
C51-2-7 Ground C51-2-19 CKP sensor (+) (if equipped)
C51-2-8 Fuel injector No.4 C51-2-20 CKP sensor (–) (if equipped)
C51-2-9 Fuel injector No.3 C51-2-21 Fuel injector No.6
C51-2-10—C51-2-22 Fuel injector No.5
C51-2-11—C51-2-23 Ignition coil assembly for No.6
C51-2-12 EGR valve (stepper motor coil 4) (if
equipped)C51-2-24 Ignition coil assembly for No.5

6E2-12 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
Engine and Emission Control Input/Output Table
Diagnosis
Refer to Section 6-1.
Ignition coil with igniter
HO2S heater control
Input
Output Function
Main relay control
Fuel pump control
Injection control
Ignition control
MIL control Idle air control
EVAP purge control
EGR control
A/C control
A/C condensor fan
controlMain relay
Fuel pump relay
Injectors
MIL
EVAP canister purge
valve IAC valve
EGR valve (if equipped)
HO2S (if equipped)
A/C amplifier
(if equipped)
A/C condensor fan
relay (if equipped)
CMP sensor
MAF sensor
TP sensor
ECT sensor
IAT sensor
HO2S (sensor 1)(if equipped)
VSS
Blower fan switch
Rear defogger switch
PSP switch
Ignition switch
Starter switch
A/C amplifier (if equipped)
TR switch (A/T VEHICLE)
Light switch
Knock sensor
CO adjusting resistor (if equipped)
Test swich terminal (Vehicle with monitor connector)
Diag. swich terminal (Vehicle with monitor connector)
Brake switch (A/T VEHICLE)
ABS control module

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-15
Idle Speed/Idle Air Control (IAC) Duty Inspec-
tion
Before idle speed/IAC duty check, make sure of the following.
•Lead wires and hoses of engine/emission control systems
are connected securely.
•Accelerator cable is adjusted.
•Ignition timing is within specification.
•All accessories (wipers, heater, lights, A/C, etc.) are out of
service.
•Air cleaner has been properly installed and is in good condi-
tion.
•ECM (PCM) does not detect any malfunction DTC.
After above items are all confirmed, check idle speed and IAC
duty as follows.
[Using SUZUKI scan tool]
1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
Special tool
(A) : SUZUKI scan tool
2) Warm up engine to normal operating temperature.
3) Check IAC duty and idle speed by using “Data List” mode of
SUZUKI scan tool.
Engine idle speed:
A/C OFF: 700 ± 50 r/min.
A/C ON: 750 ± 50 r/min.
IAC duty at specified idle speed:
5 – 40 % (at A/C OFF)
4) If duty and/or idle speed is out of specifications, check idle
air control system referring to “DIAG. FLOW TABLE B-4” in
Section 6-1.
5) Check that specified engine idle speed is obtained with A/C
ON if vehicle is equipped with A/C. If not, check A/C ON sig-
nal circuit and idle air control system. NOTE:
Before starting engine, place transmission gear shift
lever in “Neutral” (shift selector lever to “P” range for A/T
vehicle), and set parking brake and block drive wheels.

6E2-22 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
3) Remove air cleaner outlet hose and remove IAC valve from
throttle body.
4) Connect connector to IAC valve.
5) Check that plunger (1) of IAC valve moves once and then
stops as soon as ignition switch (2) is turned OFF after
cranking engine for 2 sec.
If plunger (1) of IAC valve does not operate at all, check wire
harnesses for open and short. If wire harnesses are in good
condition, replace IAC valve and recheck.
INSTALLATION
1) Install new O-ring to throttle body.
2) Install IAC valve to throttle body.
3) Tighten IAC valve screws to specified torque.
Tightening torque
IAC valve screw (a) : 3.5N·m (0.35 kg-m, 2.5 lb-ft)
4) Connect IAC valve connector securely.
5) Connect negative (–) cable to battery.
Fast idle air valve
1) Disconnect IAC valve coupler with ignition switch OFF.
2) Check that with cold engine started, as cooling water tem-
perature rises, engine idle speed reduces gradually.
If check result is as described above, fast idle air valve is in
good condition.
If not, fast idle air valve, air passage or coolant passage is
faulty. NOTE:
This check should be performed by two people, one per-
son operates ignition switch while the other checks
plunger operation.

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-23
Fuel Delivery System
Fuel pressure inspection
1) Relieve fuel pressure in fuel feed line referring to “FUEL
PRESSURE RELIEF PROCEDURE” in Section 6-1.
2) Disconnect fuel feed hose from (3) delivery fuel feed pipe (1).
3) Connect special tools and hose (2) between fuel feed hose
and fuel feed pipe as shown in figure, and clamp hose
securely to ensure no leaks occur during checking.
Special tool
(A) : 09912-58441
(B) : 09912-58431
(C) : 09912-58490
4) Check that battery voltage is above 11 V.
5) Turn ignition switch ON to operate fuel pump and after 3 sec-
onds turn it OFF. Repeat this 3 or 4 times and then check
fuel pressure.
6) Start engine.
7) Measure fuel pressure at idling.
If measure pressure doesn’t satisfy specification, refer to
“Diagnostic Flow Table B-3” in Section 6-1 and check each
possibly defective part. Replace if found defective.
Fuel pressure specification: CAUTION:
A small amount of fuel may be released when fuel feed
hose is removed. Place container under the fuel feed
hose or fuel feed pipe with a shop cloth so that released
fuel is caught in container or absorbed in cloth. Place
that cloth in an approved container.
CONDITION FUEL PRESSURE
With fuel pump operating and
engine stopped270 – 310 kPa
2.7 – 3.1 kg/cm
2
38.4 – 44.0 psi
At specified idle speed 210 – 260 kPa
2.1 – 2.6 kg/cm
2
29.8 – 37.0 psi
With 1 min. after engine (fuel pump)
stop (Pressure reduces as time
passes)over 200 kPa
2.0 kg cm
2
28.4 psi

6E2-24 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
8) After checking fuel pressure, remove fuel pressure gauge
(1).
9) Remove fuel pressure gauge, hose and 3-way joint.
10) Connect fuel feed hose and clamp it securely.
11) With engine “OFF” and ignition switch “ON”, check for fuel
leaks.
Fuel pump
ON-VEHICLE INSPECTION
1) Remove filler cap and turn ON ignition switch (2). Then fuel
pump operating sound should be heard from fuel filler (1) for
about 3 seconds and stop. Be sure to reinstall fuel filler cap
after checking.
If above check result is not satisfactory, advance to “DIAG-
NOSTIC FLOW TABLE B-1” in Section 6-1
2) Fuel pressure should be felt at fuel return hose (1) for 3 sec-
onds after ignition switch ON.
If fuel pressure is not felt, advance to “DIAGNOSTIC FLOW
TABLE B-3” in Section 6-1. CAUTION:
As fuel feed line is still under high fuel pressure, make
sure to release fuel pressure according to following pro-
cedures.
Place fuel container under joint.
Cover joint with rag and loosen joint nut slowly to
release fuel pressure gradually.
CAUTION:
When fuel filler cap is removed in any procedure, work
must be done in a well-ventilated area, keep away from
any open flames and without smoking.

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.