Piaa H4 User Manual

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PKI-0045PKI-0045
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Thank you very much for purchasing PIAA product. Read this instruction
manual thoroughly for proper use of the product. After completing your
installation, please keep this manual for future reference.
Installation Manual for LED Performance Bulbs (Type H4)
For customers …………………………･ Please forward this manual to the next owner.
For installation service agents ……… Be sure to hand over this instruction manual to
the customer after installation.
※ marks and marks
in this manual indicate important notices for
installing this product. Be sure to follow these
notices in order to ensure safe and reliable work.
Indicates procedures or situations
that may cause bodily harm if used
improperly.
Indicates items that may cause
damage or abnormality to products
if used improperly.
① LED bulb assembly
(H4 type) 【２ pieces】
② Controller【２ pieces】
③ Tie wrap【6 pieces】
Contents
● This product complies with JIS standards (Japanese Industrial Standards) D5500 and is set and produced
within the white light region defined by the automotive headlamp standards.
※ Supplement (JIS D5500)
The values for white light defined by the JIS standards are as follows.
When these numbers are shown in a graph, the beam widths are indicated in the list below.
When the measurement results are within the chromaticity range specified by JIS D5500 it is determined as
white light.
■ Japanese Industrial Standards
Chromaticity Range
【White】 0.500≧ｘ≧0.310
ｙ≦0.150＋0.640ｘ
ｙ≧0.050＋0.750ｘ
0.440≧ｙ≧0.382
CIE CHROMATICITY DIAGRAM
0.500.480.460.44 0.560.540.520.420.400.380.360.340.320.30
0.46
0.44
0.42
0.50
0.48
0.52
0.40
0.38
0.36
0.34
0.32
0.30
0.28
0.26
y
x
Japanese Industrial Standards
(JIS) white light range
【2】Regarding car inspections
PIAA CORPORATION
www.piaa.com
www.piaa.co.jp

Piaa H4 Specifications

General

Brand	Piaa
Model	H4
Category	Lighting Equipment
Language	English

Summary

Precautions for Use

Safety and Operational Warnings

Covers eye safety, modification risks, handling hot lamps, radio interference, and condensation issues.

Precautions for Replacement

Safe Installation and Handling Guidelines

Details safe practices for bulb replacement, including vehicle preparation, handling parts, and preventing damage.

Replacement Procedure

Preparation and Bulb Removal

Refer to vehicle manual, remove parts if needed, and detach the metal cap from the LED bulb assembly.

Installing Metal Cap and Rubber Components

Secure metal cap with bulb spring, re-install O-ring and original rubber cap onto the LED bulb.

Securing LED Bulb and Final Assembly

Lock the LED bulb firmly in place and insert the original rubber cap into the headlamp unit.

Connecting Components and Testing

Connect LED bulb assembly to controller, vehicle connector, and verify light output and beam alignment.

Car Inspections and Standards

JIS D5500 White Light Compliance

Details compliance with Japanese Industrial Standards (JIS D5500) for white light output in automotive headlamps.