IGNITION(H4DO)
IG(H4DO)

IGNITION(H4DO) > General Description
SPECIFICATION

Item | Specifications
Ignition coil | Type | FK0523
Manufacturer | Diamond Electric
Ignition system | Independent ignition coil
Spark plug | Type | DILKAR7Q8
Manufacturer | NGK
Thread size (diameter, pitch, length) | mm | 12.0, 1.25, 26.5
Spark plug gap | mm (in) | Standard | 0.7 — 0.8 (0.028 — 0.031)
Electrode | Center electrode | Iridium
Ground electrode | Platinum

IGNITION(H4DO) > General Description
COMPONENT

(1) | Spark plug | (2) | Ignition coil | Tightening torque: N·m (kgf-m, ft-lb)
|  |  |  | T1: | 8.5 (0.9, 6.3)
|  | T2: | 17.5 (1.8, 12.9)

IGNITION(H4DO) > General Description
CAUTION

- When performing service operation, refer to “Repair Contents” in “General Description”. REPAIR CONTENTS>Repair Contents

- Prior to starting work, pay special attention to the following:

  1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective goggles, etc. if necessary.

  2. Protect the vehicle using a seat cover, fender cover, etc.

  3. Prepare the service tools, clean cloth, containers to catch grease and oil, etc.

- Prevent scattering of grease and oil. If it scatters, wipe it off immediately to prevent it from penetrating the floor or flowing out, to protect the environmental.

- If the grease and oil is spilt over the engine, exhaust pipe or the under cover, completely wipe it off to avoid emission of smoke or causing a fire.

- Vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated parts.

- When performing a repair, identify the cause of trouble and avoid unnecessary work.

- Before disconnecting connectors of sensors or units, be sure to disconnect the ground terminal from the battery sensor.

- Always use the jack-up point when the lifting device, shop jacks or rigid racks are used to support the vehicle.

- Before starting works, remove dirt and corrosion around the target area.

- Keep the removed parts in order and protect them from dust and dirt.

- All removed parts, if to be reused, should be reinstalled in the original positions with attention to the correct directions, etc.

- For the parts except for the non-reusable parts, replace then with new parts if necessary.

- Be sure to tighten bolts and nuts to the specified torque.

IGNITION(H4DO) > Ignition Coil
REMOVAL
1. RH SIDE
1.

Disconnect the ground terminal from battery sensor. REPAIR CONTENTS>NOTE > BATTERY

2.

Remove the air cleaner case. INTAKE (INDUCTION)(H4DO)>Air Cleaner Case>REMOVAL

3.

Disconnect the connector from ignition coil.

While pressing the spring (a) shown in the figure, slide it in the direction of the arrow with a clip remover.

4.

Remove the ignition coil.

2. LH SIDE
1.

Remove the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery>REMOVAL

2.

Disconnect connector (A) from ECM.

In order to prevent damaging the connector (A), check that the lock is released completely when moving the lever.

To disconnect the connector (A), press the portion (a) shown in the figure to release the lock and move the lever in the direction of arrow.

3.

Disconnect the connector (B) and terminal (C) from the main fuse box, and remove the engine wiring harness from the clip (D).

4.

Release the claw (A) securing the battery cable assembly to the bracket.

5.

Release the claw (B) securing the engine wiring harness to the bracket, and place it aside so that it does not interfere with work.

6.

Remove the bracket.

7.

Disconnect the connector from ignition coil.

While pressing the spring (a) shown in the figure, slide it in the direction of the arrow with a clip remover.

8.

Remove the ignition coil.

IGNITION(H4DO) > Ignition Coil
INSTALLATION
1. RH SIDE
1.

Install the ignition coil.

Degrease the mounting bolts, rocker cover installation portion and ignition coil installation hole.

Tightening torque:

8.5 N·m (0.9 kgf-m, 6.3 ft-lb)

2.

Connect the connector to the ignition coil.

3.

Install the air cleaner case. INTAKE (INDUCTION)(H4DO)>Air Cleaner Case>INSTALLATION

4.

Connect the ground terminal to battery sensor. REPAIR CONTENTS>NOTE > BATTERY

2. LH SIDE
1.

Install the ignition coil.

Degrease the mounting bolts, rocker cover installation portion and ignition coil installation hole.

Tightening torque:

8.5 N·m (0.9 kgf-m, 6.3 ft-lb)

2.

Connect the connector to the ignition coil.

3.

Attach the bracket.

Tightening torque:

7.5 N·m (0.8 kgf-m, 5.5 ft-lb)

4.

Place the engine wiring harness and secure the engine wiring harness to the bracket with the claw (A).

5.

Secure the battery cable assembly to the bracket with the claw (B).

6.

Install the engine wiring harness to the clip (D), and connect the terminal (C) and connector (B) to the main fuse box.

Tightening torque:

7.5 N·m (0.8 kgf-m, 5.5 ft-lb)

7.

Connect connector (A) to ECM.

To prevent damage to the connector (A), when connecting the connector (A), insert the connector (A) straight in until it stops, and while maintaining the position, lock the lever.

When connecting the connector (A), check that the lever is located at the position shown in the figure (position beyond the lock portion (a)).

8.

Install the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery>INSTALLATION

IGNITION(H4DO) > Ignition Coil
INSPECTION
1.

Check that there is no deformation, cracks or other damages.

2.

Check that there is no electric leakage from other than the center tip.

3.

For inspection procedure of ignition control system, refer to “Diagnostics with Phenomenon”. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostics with Phenomenon>IGNITION CONTROL SYSTEM

IGNITION(H4DO) > Spark Plug
REMOVAL
1. RH SIDE
1.

Disconnect the ground terminal from battery sensor. REPAIR CONTENTS>NOTE > BATTERY

2.

Remove the ignition coil (RH side). IGNITION(H4DO)>Ignition Coil>REMOVAL > RH SIDE

3.

Remove the spark plug.

2. LH SIDE
1.

Remove the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery>REMOVAL

2.

Remove the ignition coil (LH side). IGNITION(H4DO)>Ignition Coil>REMOVAL > LH SIDE

3.

Remove the spark plug.

IGNITION(H4DO) > Spark Plug
INSTALLATION
1. RH SIDE
1.

Install the spark plug.

Tightening torque:

17.5 N·m (1.8 kgf-m, 12.9 ft-lb)

2.

Install the ignition coil (RH side). IGNITION(H4DO)>Ignition Coil>INSTALLATION > RH SIDE

3.

Connect the ground terminal to battery sensor. REPAIR CONTENTS>NOTE > BATTERY

2. LH SIDE
1.

Install the spark plug.

Tightening torque:

17.5 N·m (1.8 kgf-m, 12.9 ft-lb)

2.

Install the ignition coil (LH side). IGNITION(H4DO)>Ignition Coil>INSTALLATION > LH SIDE

3.

Install the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery>INSTALLATION

IGNITION(H4DO) > Spark Plug
INSPECTION
1.

Check the spark plug for damage. If defective, replace the spark plug.

(A) | Terminal damage or looseness | (B) | Crack or damage in insulator | (C) | Damaged gasket

2.

Check the spark plug electrode and condition of the insulator. If abnormal, check and repair the cause and replace the spark plug.

(1)

Normal:

Brown to grayish-tan deposits and slight electrode wear indicate correct spark plug heat range.

(2)

Carbon fouled:

Dry fluffy carbon deposits on the insulator and electrode are mostly caused by slow-speed driving in town, weak ignition, too rich fuel mixture, etc.

(3)

Oil fouled:

Wet black deposits show oil entrance into combustion chamber through worn piston rings or increased clearance between valve guides and valve stems.

(4)

Overheating:

A white or light gray insulator with black or brown spots and bluish burnt electrodes indicate engine overheating, wrong selection of fuel, or loose spark plugs.

3.

Using a nylon brush, etc., clean and remove the carbon or oxide deposits from the spark plug. If deposits are too stubborn, replace the spark plugs.

- Never use a plug cleaner.

- Do not use a metal brush as it may damage the electrode area.

4.

Check the spark plug gap “L” using a gap gauge. If it is not within the standard, replace the spark plug.

Do not adjust the gap, because the iridium plug is used.

Standard

0.7 — 0.8 mm (0.028 — 0.031 in)