Annex 
1 
 Soliciting public opinions about a draft of the notification to revise a part of 
notifications to define the details of the safety standards for road transport 
vehicles  
 
 
１．Background 
Automated driving technology consists of sophisticated and complex sensing devices and electronic 
control devices. If these devices fail, the expected functions may not be exhibited, and malfunctions 
may occur. Therefore, in order to establish a function confirmation method that goes down to the 
electronic control devices, we established the “Study Group on the Way of Car Inspection Method 
Using an OBD(On-Board Diagnostics)” and examined the car inspection method (e-PTI : Periodical 
Technical Inspection) using an OBD. The contents of the inspection method were compiled at the 
Study Group on the Way of Car Inspection Method Using an OBD March 2019. 
In order to take action based on the results of this study, we will revise the notification (Ministry of 
Land, Infrastructure, Transport and Tourism, Notification 2002 No. 619) that defines the details of the 
safety standards for road transport vehicles. 
 
2.  Outline of Amendment 
(1) Stipulate vehicle inspection standards using an OBD in the process of use (Detailed Notification 
Article 169) 
Scope 
Vehicles that fall under all of the following 
①  Model designation vehicles or multi-spec vehicle 
②  Passenger vehicles, buses, trucks (M1, M2, M3, N1, N2, N3) 
③  New models after 2021 (for imported vehicles, after 2022) 
Technical requirements 
Apparatus Outline of standards to be established Target vehicles 
Automatic command type 
steering function No code corresponding to the 
following will need to be recorded: 
①The target device does not meet the 
performance requirements due to the 
failure concerned; 
②The automobile manufacturer 
defines the target device by judging it 
as malfunctioning concerning failure 
information recorded in the OBD, as a 
result of circuit diagnosis, function 
diagnosis or threshold diagnosis 
determined by the automobile 
manufacturer, or failure diagnosis 
combining these (required not to need 
to run when performing inspection). Vehicles that fall under all 
of the following 
①Model designation 
vehicles  or multi-spec 
vehicles 
②Passenger vehicles, 
buses, trucks (M1, M2, 
M3, N1, N2, N3) 
③New models after 2021 
(for imported vehicles, 
after 2022) 
 
 
 
  
2 
 （2）Stipulate vehicle inspection standards using an OBD in the process of use (Detailed Notification 
Article 171) 
Scope 
Same as (1) 
Technical requirements 
Apparatus Outline of standards to be established Target vehicles 
Device capable of 
effectively preventing the 
rotational movement of 
wheels from stopping, 
which significantly 
impedes braking of a 
moving vehicle. Same as (1) Same as (1) 
Device capable of 
effectively preventing 
skidding or rollover that 
significantly impedes 
turning of a moving 
vehicle. Same as (1) Same as (1) 
Braking device equipped 
with an electric device for 
controlling the braking 
force 
 Same as (1) Vehicles that are 
exclusively used for 
passengers and 
accommodate less than 
10 passengers 
Collision damage 
mitigation braking control 
device Same as (1) Same as (1) 
(3) Stipulate vehicle inspection standards using an OBD in the process of use (Detailed Notification 
Article 223-3)  
Scope 
Same as (1) 
Technical requirements 
Apparatus Outline of standards to be established Target vehicles 
Vehicle approach 
notification device Same as (1) Same as (1) 
(4) Stipulate vehicle inspection standards using an OBD in the process of use (Detailed Notification 
Article 197) 
Scope 
Same as (1)  
3 
 Technical requirements 
Apparatus Outline of standards to be established Target vehicles 
Exhaust gas emission 
prevention device There will be a need to meet ① or ②: 
①Failure details of the parts and 
system specified in II. 2 of Attachment 
48 of the notification specifying details 
of safety standards for road transport 
vehicles “Technical Standards for OBD 
for Preventing Emissions of Smoke, 
Odorous Gases, and Hazardous Gases 
from Vehicles” are not recorded; 
②The vehicle's telltale (limited to the 
one related to the engine) to which the 
technical requirements of the 
agreement rule No. 121 or the technical 
requirements of the agreement rule No. 
60 are applied is not lit abnormally. 
 
 Vehicles with a gross vehicle 
weight exceeding 3.5 tons 
among ordinary vehicles and 
small vehicles  that use 
gasoline or LPG as fuel 
(excluding vehicles 
exclusively used for 
passengers with a maximum 
capacity of less than 9), as 
well as ordinary vehicles and 
small vehicles that use diesel 
oil as fuel (excluding vehicles 
with a gross vehicle weight 
exceeding 3.5 tons (excluding 
vehicles exclusively used for 
passengers with a maximum 
capacity of less than 9)) 
In diagnosing a failure of the concerned 
system equipped with any of the 
catalyst, engine misfire detection 
system, oxygen sensor or air-fuel ratio 
sensor, exhaust gas recirculation 
system, fuel supply system and exhaust 
secondary air system, when any of the 
readiness codes specified in III. 3 of 
Attachment 48 of the notification 
specifying details of safety standards 
for road transport vehicles is recorded, 
there will be a need to meet ① or ②: 
①Failure information stored in 6.1 (3) 
for failure information specified in III 3.1 
of Attachment 48 (limited to codes for 
identifying failure states specified in the 
safety standards 7.3) is not recorded; 
②The vehicle's telltale (limited to the 
one related to the engine) to which the 
technical requirements of the 
agreement rule No. 121 or the technical Vehicles with a gross vehicle 
weight not exceeding 3.5 tons 
or vehicles exclusively used 
for passengers with a 
maximum capacity of less 
than 9 among ordinary 
vehicles and small vehicles 
that use gasoline or LPG as 
fuel 
 
 
 
 
 
 
 
 
 
 
 
  
4 
 requirements of the agreement rule No. 
60 are applied is not lit abnormally. 
In diagnosing a device specified in 
Ⅳ.2.1 of Attachment 48, when any of 
the readiness codes (limited to those 
set to completion) specified in 2.6.1.5 of 
the safety standards is recorded, there 
will be a need to meet ① or ②: 
①The failure code as defined in Ⅳ．
2.2. of Attachment 48 (limited to the 
failure code that has been confirmed as 
a Class A failure as defined in 2.5.3.1 of 
the safety  standards and the failure 
code that has been confirmed as a 
Class B failure (limited to a failure code 
whose B1 counter has reached 200 
hours)as defined in 2.5.3.2 of the safety 
standards) is not recorded; 
②The vehicle's telltale (limited to the 
one related to the engine) to which the 
technical requirements of the 
agreement rule No. 121 or the technical 
requirements of the agreement rule No. 
60 are applied is not lit abnormally. Vehicles with a gross vehicle 
weight exceeding 3.5 tons 
among ordinary vehicles and 
small vehicles that use diesel 
oil as fuel (excluding vehicles 
exclusively used for 
passengers with a maximum 
capacity of less than 9) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3.  Amendment shall enter into force in April, 2020. 
e-PTI will be conducted from October, 2024/2025 for imported vehicles.