Suzuki Grand Vitara JB627. Manual — part 111

1H-6 Ignition System:

Repair Instructions

Ignition Timing Inspection

S6JB0B1806001

NOTE
Before starting engine, place transmission
gear shift lever in “Neutral” (shift selector
lever to “P” range for A/T model), and set
parking brake.

1) Start engine and warm it up to normal operating

temperature.

2) Make sure that all of electrical loads except ignition

are switched OFF.

3) Check to be sure that idle speed is within

specification referring to “Idle Speed and IAC
Throttle Valve Opening Inspection in Section 1A”.

4) Connect SUZUKI scan tool to DLC (1) with ignition

switch OFF, restart engine and fix ignition timing by
using fixed spark mode of SUZUKI scan tool.

Special tool
(A): SUZUKI scan tool

5) Set timing light to ignition harness for No.1 cylinder.
6) Using timing light, check that timing observed from

viewpoint is within specification.

Initial ignition timing
Fixed with SUZUKI scan tool: 5

± 1° BTDC

Ignition order
1-6-5-4-3-2

Special tool
(A): 09930–76420

7) If ignition timing is out of specification, check the

followings.
• CKP sensor
• CKP sensor plate
• TP sensor
• CMP sensor
• CMP sensor rotor tooth of camshaft
• Wheel speed sensor (VSS)
• Timing chain cover installation

8) After checking initial ignition timing, release ignition

timing fixation by using scan tool.

9) With engine idling (throttle opening at closed position

and vehicle stopped), check that ignition timing is
about 10

°– 16° BTDC. (Constant variation within a

few degrees from 10

° – 156° BTDC indicates no

abnormality but proves operation of electronic timing
control system.) Also, check that increasing engine
speed advances ignition timing.
If the check results are not satisfactory, check CKP
sensor and ECM.

(A)

1

I5JB0A510016-01

1. Timing mark on crankshaft pulley

I6JB01180004-02

Ignition System: 1H-7

Ignition Coil Assembly (Igniter and Ignition
Coil) Removal and Installation

S6JB0B1806002

Removal

1) Remove surge tank cover.
2) Disconnect ignition coil coupler.
3) Remove ignition coil bolt (1), and then pull out

ignition coil assembly (2).

Installation
Install in reverse order of removal.

Tightening torque
Ignition coil bolt (a): 6.5 N·m (0.65 kgf-m, 5.0 lb-ft)

Ignition Coil Assembly (Igniter and Ignition
Coil) Inspection

S6JB0B1806003

Check ignition coil assembly for the following:
• Damage
• Deterioration
• Terminal for corrosion

Spark Plug Removal and Installation

S6JB0B1806004

Removal

1) Remove ignition coil assembly (1) referring to

“Ignition Coil Assembly (Igniter and Ignition Coil)
Removal and Installation”.

2) Remove spark plug (2).

Installation

1) Install spark plug (1) and tighten them to specified

torque.

Tightening torque
Spark plug (a): 25 N·m (2.5 kgf-m, 18.0 lb-ft)

2) Install ignition coil assembly (2) referring to “Ignition

Coil Assembly (Igniter and Ignition Coil) Removal
and Installation”.

Spark Plug Inspection

S6JB0B1806005

Inspect them for electrode, air gap wear carbon deposits
and Insulator damage.
If any abnormality is found, adjust air gap, clean with
spark plug cleaner or replace them with specified new
plug.

Spark plug air gap “a”
: 1.0 – 1.1 mm (0.039 – 0.043 in.)

Spark plug type
DENSO: K20PR-U11
NGK: BKR6E-11

I6JB01180005-02

I4JA01180002-01

I4JA01180003-01

IYSQ01181012-01

1H-8 Ignition System:

Specifications

Tightening Torque Specifications

S6JB0B1807001

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fastener Information in Section 0A”.

Special Tools and Equipment

Special Tool

S6JB0B1808001

Fastening part

Tightening torque

Note

N

⋅m

kgf-m

lb-ft

Ignition coil bolt

6.5

0.65

5.0

)

Spark plug

25

2.5

18.0

)

09930–76420

SUZUKI scan tool

Timing-light (dry cell type)

—

)

This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loop back
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. )

Starting System: 1I-1

Engine

Starting System

General Description

Cranking Circuit Introduction

S6JB0B1901001

The cranking circuit consists of the battery, starting motor, ignition switch, and related electrical wiring. These
components are connected electrically.

Starting Motor Circuit Description

S6JB0B1901002

• The magnetic switch coils are magnetized when the ignition switch is closed.
• The resulting plunger and pinion drive lever movement causes the pinion to engage the engine flywheel gear and

the magnetic switch main contacts to close, and cranking takes place.

• When the engine starts, the pinion over-running clutch protects the armature from excessive speed until the switch

is opened, at which time the return spring causes the pinion to disengage.

I5JB0A190004-01

1. Pinion drive lever

6. Magnetic switch contacts

11. Ignition & Starter switch

2. Pinion & Over-running clutch

7. Pull-in coil

12. Battery

3. Magnetic switch

8. Starting motor

13. To ECM

4. Hold-in coil

9. Starting motor control relay

5. Plunger

10. A/T: Transmission range switch (shift lever switch)