sensor SUZUKI SWIFT 2000 1.G SF310 Service Workshop Manual

6F-4 IGNITION SYSTEM
STEPACTIONYESNO
6Ignition Coil Power Supply and Ground Circuit
Check
1) Check ignition coil power supply (“B/W” wire)
circuit for open and short.
Are circuits in good condition?Go to Step 7.Repair or replace.
7Ignition Coil Check
1) Check ignition coil for resistance, referring to
“Ignition Coil” in this section.
Is check result satisfactory?Go to Step 8.Replace ignition coil
assembly.
8CMP Sensor Check
1) Check CMP sensor and signal rotor, referring to
“Distributor Unit” in this section.
Is check result satisfactory?Go to Step 9 on the
next page.Adjust or replace.
9Ignition Trigger Signal Circuit Check
1) Check ignition trigger signal (“Br / Y” or “Or” wire)
circuit for open, short and poor connection.
Are circuits in good condition?Go to Step 10.Repair or replace.
10Igniter Check
1) Check igniter, referring to “Igniter” in this section.
Is check result satisfactory?Go to Step 11.Replace igniter.
11Ignition Timing Check
1) Check initial ignition timing and ignition timing
advance, referring to “Ignition Timing” in this
section.
Is check result satisfactory?Substitute a known-
good ECM (or PCM)
and then repeat
Step 2.Go to Step 12.
12Ignition Timing Adjustment and Recheck
1) Adjust initial ignition timing, referring to “Ignition
Timing” in this section.
2) Recheck initial ignition timing and ignition timing
advance, referring to “Ignition Timing” in this
section.
Is check result satisfactory?System is in good
condition.Substitute a known-
good ECM (or PCM)
and then repeat
Step 2.

1. Pickup coil
2. Signal rotor
3. Screws
1. Distributor
2. Coupler
3. Ohmmeter
6F-8 IGNITION SYSTEM
DISTRIBUTOR
DISTRIBUTOR CAP AND ROTOR
INSPECTION
Check cap and rotor for crack and their terminals for corrosion and
wear. Replace as necessary.
SIGNAL ROTOR AIR GAP
INSPECTION
1) Remove distributor cap and rotor.
2) Using thickness gauge, measure air gap, between signal rotor
tooth and CMP sensor (generator).
Signal rotor air gap “a”: About 0.2 mm (about 0.008 in.)
3) If gap is out of specification, loose CMP sensor (signal genera-
tor) securing screws. Using blade (–) screw driver, move CMP
sensor (generator) and adjust gap to specification. After adjust-
ment, tighten securing screws and recheck gap.
NOTE:
Check to make sure that CMP sensor (signal generator)
tooth is free from any metal particles.
4) Install distributor cap and rotor.
CMP SENSOR (PICKUP COIL) RESISTANCE
INSPECTION
1) Disconnect distributor lead coupler.
2) Measure resistance of pickup coil by using ohmmeter.
3) If resistance is out of specification, replace CMP sensor (signal
generator) as follows.
Pickup coil resistance:
185 – 275 Ω at – 10C (14F) – 50C (122F)
240 – 325 Ω at 50C (122F) – 100C (212F)
4) Remove distributor cap and rotor.
5) Remove CMP sensor (signal generator) securing screws and
lead wire clamp screws.
6) Replace CMP sensor (signal generator).
7) Adjust signal rotor air gap to specifications as previously out-
lined.
8) Install rotor, distributor cap seal and cap.

1. Cap
2. Cap seal
3. Cap screw
4. Rotor
5. CMP sensor
(Signal generator)
6. Screw
7. Cover
8. Housing
9. O-ring
A: Slot offset
1. Distributor case
2. O-ring3. Distributor coupling
4. Camshaft
6F-10 IGNITION SYSTEM
DISTRIBUTOR UNIT
DISMOUNTING
1) Disconnect distributor lead coupler.
2) Remove distributor cap screws and cap.
3) Remove distributor flange bolts.
4) Pull out distributor housing assembly.
REMOUNTING
NOTE:

Before installing distributor, check to make sure that its
O-ring is in good condition.

If new O-ring is installed, apply oil.
1) Install distributor without cap to camshaft.
Fit the dogs of distributor coupling into the slots of camshaft,
when installing. The dogs of distributor coupling are offset.
Therefore, if the dogs can not shaft by 180 degree and try again.
2) Lightly install flange bolts and prepare for ignition timing adjust-
ment.
3) Check to make sure that rotor is in good condition.
4) Inspect distributor cap and clean or replace as required.
5) Make sure that distributor cap seal is placed properly and install
cap, and then fasten it with screws.
6) Connect distributor lead coupler.
7) Check and adjust ignition timing as previously outlined.

6F1
IGNITION SYSTEM (SFI FOR G13) 6F1-1
GENERAL DESCRIPTION6F1-2 . . . . . . . . . . . . . .
DIAGNOSIS6F1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE6F1-5 . . . . . . . . . . . . . . . .
Ignition Spark Test 6F1-5. . . . . . . . . . . . . . . . . . . .
High-Tension Cords 6F1-5. . . . . . . . . . . . . . . . . . . Spark Plugs 6F1-6. . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Coil Assembly 6F1-6. . . . . . . . . . . . . . . . .
Crankshaft Position Sensor 6F1-7. . . . . . . . . . . .
Ignition Timing 6F1-7. . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS6F1-9 . . . . . . . . . . . . . . . . . . . . . .
SECTION 6F1
IGNITION SYSTEM
(SFI FOR G13)
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 autho-
rized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under “Gener-
al Description” in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and “Service Precau-
tions” 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).
CONTENTS

1. ECM (PCM)
2. Ignition coil assembly
for No.1 and No.4 spark plugs
3. Ignition coil assembly
for No.2 and No.3 spark plugs4. CMP sensor
5. CKP sensor
6. MAP sensor
7. ECT sensor
8. IAT sensor9. TP sensor
10. VSS (A / T)
11. Transmission range switch (A / T)
12. High-tension cords
13. VSS (speedometer) (M / T)
14. Data link connector
6F1-2 IGNITION SYSTEM (SFI FOR G13)
GENERAL DESCRIPTION
The ignition system is an electronic (distributorless) ignition system. It consists of the parts as described below and
has an electronic ignition control system.

ECM (PCM)
It detects the engine and vehicle conditions 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 ignitor (power unit) in
the ignition coil assembly.

Ignition coil assembly (including an ignitor)
The ignition coil assembly has a built-in ignitor which turns ON and OFF the current flow to the primary coil accord-
ing to the signal from ECM (PCM). When the current flow to the primary coil is turned OFF, a high voltage is in-
duced in the secondary coil.

High tension cords and spark plugs.

CMP sensor (Camshaft position sensor) and CKP sensor (Crankshaft position sensor)
Using signals from these sensors, ECM (PCM) identifies the specific cylinder whose piston is in the compression
stroke and detects the crank angle.

TP sensor, ECT sensor, MAP sensor and other sensors / switches
Refer to section 6E2 for details.
Although this ignition system does not have a distributor, it has two ignition coil assemblies (one is for No.1 and
No.4 spark plugs and the other is for No.2 and No.3 spark plugs). When an ignition signal is sent from ECM (PCM)
to the ignitor in the ignition coil assembly for No.1 and No.4 spark plugs, a high voltage is induced in the secondary
coil and that passes through the high-tension cords and causes No.1 and No.4 spark plugs to spark simultaneously.
Likewise, when an ignition signal is sent to the ignitor in the other ignition coil assembly, No.2 and No.3 spark plugs
spark simultaneously.
SYSTEM COMPONENTS

1. Ignition switch
2. Main relay
3. Ignition coil assembly
for No.1 and No.4
spark plugs
4. Ignition coil assembly
for No.2 and No.3
spark plugs5. CMP sensor
6. CKP sensor
7. No.1 spark plug
8. No.2 spark plug
9. No.3 spark plug
10. No.4 spark plug11. Sensed information

MAP sensor

ECT sensor

IAT sensor

TP sensor

VSS
Park / Neutral position signal
(A / T)

Electric load signal

Engine start signal
IGNITION SYSTEM (SFI FOR G13) 6F1-3
SYSTEM WIRING DIAGRAM
DIAGNOSIS
ConditionPossible CauseCorrection
Engine cranks, but will
not start or hard to
startNo spark

Blown fuse for ignition coil

Loose connection or disconnection of lead
wire or high-tension cord(s)

Faulty high-tension cord(s)

Faulty spark plug(s)

Faulty ignition coil

Faulty CKP sensor or crankshaft timing belt
pulley

Faulty ECM (PCM)
Replace.
Connect securely.
Replace.
Adjust, clean or replace.
Replace ignition coil assembly.
Clean, tighten or replace.
Replace.
Poor fuel economy or
engine performance
Incorrect ignition timing

Faulty spark plug(s) or high-tension cord(s)

Faulty ignition coil assembly

Faulty CKP sensor or crankshaft timing belt
pulley

Faulty ECM (PCM)Check related sensors and
crankshaft timing belt pulley.
Adjust, clean or replace.
Replace.
Clean, tighten or replace.
Replace.

6F1-4 IGNITION SYSTEM (SFI FOR G13)
IGNITION SYSTEM DIAGNOSTIC FLOW TABLE
STEPACTIONYESNO
1
Was “ENGINE DIAG. FLOW TABLE” performed?Go to Step 2.Go to “ENGINE DIAG.
FLOW TABLE” in
section 6.
2
Ignition Spark Test
1) Check all spark plugs for condition and type
referring to “Spark Plugs” section.
2) If OK, perform ignition spark test, referring to
“Ignition Spark Test” section.
Is spark emitted from all spark plugs?Go to Step 11.Go to Step 3.
3
Diagnostic Trouble Code (DTC) Check
Is DTC stored in ECM (PCM)?Go to applicable DTC
Diag. Flow Table in
section 6.Go to Step 4.
4
Electrical Connection Check
1) Check ignition coil assemblies and high-tension
cords for electrical connection.
Are they connected securely?Go to Step 5.Connect securely.
5
High-Tension Cords Check
1) Check high-tension cord for resistance referring
to “High-Tension Cords” section.
Is check result satisfactory?Go to Step 6.Replace high-tension
cord(s).
6
Ignition Coil Assembly Power Supply and Ground
Circuit Check
1) Check ignition coil assembly power supply and
ground circuits for open and short.
Are circuits in good condition?Go to Step 7.Repair or replace.
7
Ignition Coil Assembly Check
1) Check ignition coil for resistance referring to
“Ignition Coil Assembly” section.
Is check result satisfactory?Go to Step 8.Replace ignition coil
assembly.
8
Crankshaft Position (CKP) Sensor Check
1) Check crankshaft position sensor referring to
Step 3 and 4 of DTC P0335 Diag. Flow Table in
section 6.
Is check result satisfactory?Go to Step 9.Tighten CKP sensor
bolt, replace CKP
sensor or crankshaft
timing belt pulley.
9
Ignition Trigger Signal Circuit Check
1) Check ignition trigger signal wire for open, short
and poor connection.
Is circuit in good condition?Go to Step 10.Repair or replace.
10
A Known-good Ignition Coil Assembly Substitution
1) Substitute a known-good ignition coil assembly
and then repeat Step 2.
Is check result of Step 2 satisfactory?Go to Step 11.Substitute a known-
good ECM (PCM) and
then repeat Step 2.
11
Ignition Timing Check
1) Check initial ignition timing and ignition timing
advance referring to “Ignition Timing” section.
Is check result satisfactory?System is in good
condition.Check CKP sensor,
crankshaft timing belt
pulley (signal rotor)
and input signals
related to this system.

IGNITION SYSTEM (SFI FOR G13) 6F1-7
5) Measure secondary coil for resistance.
Secondary coil resistance : 7.6 – 10.2 kΩ at 20C, 68F
If resistance is out of specification, replace ignition coil assem-
bly.
6) Install ignition coil assembly.
7) Tighten ignition coil bolts, and then connect ignition coil coupler.
8) Install high-tension cord to ignition coil assembly while gripping
its cap.
CRANKSHAFT POSITION SENSOR
(CKP SENSOR)
Refer to section 6E2 for removal, inspection and installation.
IGNITION TIMING
NOTE:

Ignition timing is not adjustable. If ignition timing is out of
specification, check system related parts.

Before starting engine, place transmission gear shift lever in
“Neutral” (shift selector lever to “P” range for A / T model),
and set parking brake.
INSPECTION
1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
Special Tool
(A): 09931-76011 (SUZUKI scan tool)
(B): Mass storage cartridge
(C): 09931-76030 (16 / 14 pin DLC cable)
2) Start engine and warm it up to normal operating temperature.
3) Make sure that all of electrical loads except ignition are switched
off.
4) Check to be sure that idle speed is within specification.
(Refer to SECTION 6E2)

6F1-8 IGNITION SYSTEM (SFI FOR G13)
5) Fix ignition timing to initial one as follow.
Select “MISC” mode on SUZUKI scan tool and fix ignition tim-
ing to initial one.
6) Detach air cleaner case and shift air cleaner case and hose
position to observe ignition timing.
7) Using timing light (1), check that ignition timing is within specifi-
cation.
Initial ignition timing (fixed with
SUZUKI scan tool) : 5
3 BTDC at idle speed
Ignition order : 1-3-4-2
8) If ignition timing is out of specification, check the followings:

CKP sensor

Crankshaft timing belt pulley (signal rotor)

TP sensor

VSS

Timing belt cover installation
9) After checking Initial Ignition Timing, release ignition timing
fixation by using SUZUKI scan tool.
10) With engine idling (throttle opening at closed position and ve-
hicle stopped), check that ignition timing is about 9–15
BTDC. (Constant variation within a few degrees from 9–15
indicates no abnormality but proves operation of electronic tim-
ing control system.) Also, check that increasing engine speed
advances ignition timing.
If above check results are not satisfactory, check CKP sensor
and ECM (PCM).
11) Install air cleaner case.

6K
1. Exhaust manifold
2. Seal
3. WU-TWC
4. Exhaust pipe
5. Muffler
6. Muffler mounting
7. Gasket
8. Heated oxygen sensor : Tightening Torque : Do not reuse
[For 1.0
2WD H / B model]
EXHAUST SYSTEM 6K-1
SECTION 6K
EXHAUST SYSTEM
NOTE:
For the descriptions (items) not found in this section, refer to the same section of Service Manual men-
tioned in FOREWORD of this manual.
CONTENTS
ON-VEHICLE SERVICE6K-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE