Suzuki Grand Vitara JB416 / JB420. Manual — part 133

1H-11 Ignition System:

Specifications

Tightening Torque Specifications

S5JB0A1807001

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

S5JB0A1808001

Fastening part

Tightening torque

Note

N

⋅m

kgf-m

lb-ft

Spark plug

25

2.5

18.0

)

Ignition coil bolt for M16 engine

10

1.0

7.5

)

Ignition coil bolt for J20 engine

6.5

0.65

5.0

)

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

Precautions

Cranking System Note

S5JB0A1900001

NOTE
Starting motor varies depending on specifications, etc.
Therefore, be sure to check model and specification of the vehicle being serviced before replacing
parts.

General Description

Cranking Circuit Introduction

S5JB0A1901001

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

Starting Motor Circuit Description

S5JB0A1901002

• 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)

1I-2 Starting System:

Diagnostic Information and Procedures

Cranking System Symptom Diagnosis

S5JB0A1904001

Possible symptoms due to starting system trouble would be as follows:
• Starting motor does not run (or runs slowly)
• Starting motor runs but fails to crank engine
• Abnormal noise is heard
Proper diagnosis must be made to determine exactly where the cause of each trouble lies in battery, wiring harness,
(including starting motor switch), starting motor or engine.
Do not remove motor just because starting motor does not run. Check the following items and narrow down scope of
possible causes.

1) Condition of trouble
2) Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
3) Discharge of battery
4) Mounting of starting motor

Condition

Possible cause

Correction / Reference Item

Motor not running – No
operating sound of
magnetic switch

Transmission range sensor is not in P or
N, or not adjusted (A/T)

Shift in P or N, or adjust sensor.

Malfunction of clutch pedal position
switch (M/T)

Adjust or replace.

Battery run down

Recharge battery.

Battery voltage too low due to battery
deterioration

Replace battery.

Poor contact in battery terminal
connection

Retighten or replace.

Loose grounding cable connection

Retighten.

Fuse set loose or blown off

Tighten or replace.

Poor contacting action of ignition switch
and magnetic switch

Replace.

Lead wire coupler loose in place

Retighten.

Open-circuit between ignition switch and
magnetic switch

Repair.

Open-circuit in pull-in coil

Replace magnetic switch.

Brushes are seating poorly or worn
down

Repair or replace.

Poor sliding or plunger and/or pinion

Repair.

Faulty starting motor control relay

“Main Relay, Fuel Pump Relay, Starting Motor
Control Relay and Throttle Actuator Control
Relay Inspection: in Section 1C”.

Faulty ECM and its circuit

“Inspection of ECM and its Circuits: in Section
1A”.

Motor not running –
Operating sound of
magnetic switch heard

Battery run down

Recharge battery.

Battery voltage too low due to battery
deterioration

Replace battery.

Loose battery cable connections

Retighten.

Burnt main contact point, or poor
contacting action of magnetic switch

Replace magnetic switch.

Brushes are seating poorly or worn
down

Repair or replace.

Weakened brush spring

Replace.

Burnt commutator

Replace armature.

Layer short-circuit of armature

Replace.

Crankshaft rotation obstructed

Repair.

Starting System: 1I-3

Starting motor running,
but too slow (small
torque) – Battery and
wiring are satisfactory

Insufficient contact of magnetic switch
main contacts

Replace magnetic switch.

Layer short-circuit of armature

Replace.

Disconnected, burnt or worn
commutator

Repair commutator or replace armature.

Worn brushes

Replace brush.

Weakened brush springs

Replace spring.

Burnt or abnormally worn end bush

Replace bush.

Starting motor running,
but not cranking engine

Worn pinion tip

Replace over-running clutch.

Poor sliding of over-running clutch

Repair.

Over-running clutch slipping

Replace over-running clutch.

Worn teeth of ring gear

Replace flywheel (M/T) or drive plate (A/T).

Noise

Abnormally worn bush

Replace bush.

Worn pinion or worn teeth of ring gear

Replace over-running clutch, flywheel (M/T) or
drive plate (A/T).

Poor sliding of pinion (failure in return
movement)

Repair or replace.

Worn internal or planetary gear teeth

Replace.

Lack of oil in each part

Lubricate.

Starting motor does not
stop running

Fused contact points of magnetic switch Replace magnetic switch.
Short-circuit between turns of magnetic
switch coil (layer short-circuit)

Replace magnetic switch.

Failure of returning action in ignition
switch

Replace.

Condition

Possible cause

Correction / Reference Item