18-220-22

ATTENTION:
GENERAL MANAGER
IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.
�
PARTS MANAGER
�
CLAIMS PERSONNEL
�
SERVICE MANAGER
�
© 2022 Subaru of America, Inc. All rights reserved.
SERVICE BULLETIN
APPLICABILITY: 2019-22MY Ascent
		 2015-20MY WRX/WRX STI
SUBJECT:
NUMBER:
DATE:
18-220-22
04/06/22
Service Manual Corrections
INTRODUCTION
The purpose of this bulletin is to provide a description of current changes to Service Manuals
available via the Subaru Technical Information System (STIS) web site. The tables contained within
this bulletin are to be used as guides for becoming aware of the latest changes. We advise you to
always refer to the STIS web site when looking for the latest Service information. Printed pages will
not be made available to update printed Service Manuals.
Paper manuals may have different page numbering then what is reflected below, based on
multiple new and revised pages. Please refer to the information contained on the STIS web site
for all future, update service manual information.
YEAR
MODEL
SECTION
Engine
2019
SUB-SECTION
PAGE or CHAPTER
DESCRIPTION OF CHANGE
Emission Controls
"Engine
> EMISSION CONTROL
(AUX. EMISSION CONTROL
DEVICES)(H4DOTC)
> General Description
> COMPONENT
> PCV SYSTEM"
Illustrations and descriptions of the
PCV diagram were changed.
Instrumentation
"Body & Electrical/WIRING
SYSTEM
> INSTRUMENTATION/
DRIVER INFO
> Combination Meter System
> OPERATION
> VARIANT WORK"
Variant work procedure was
changed
Ascent
Body Electrical
CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD RESULT IN
SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles, or
to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how to
do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.
SUBARU OF AMERICA, INC. IS
ISO 14001 COMPLIANT
ISO 14001 is the international standard
for
excellence
in
Environmental
Management Systems. Please recycle
or dispose of automotive products in a
manner that is friendly to our environment
and in accordance with all local, state
and federal laws and regulations.
Continued...
Bulletin Number: 18-199-21; Date: 04/06/22
Page 1 of 3
YEAR
2020
MODEL
Ascent
SECTION
Body Electrical
SUB-SECTION
PAGE or CHAPTER
DESCRIPTION OF CHANGE
Instrumentation
"Body & Electrical/WIRING
SYSTEM
> INSTRUMENTATION/
DRIVER INFO
> Combination Meter System
> OPERATION
> VARIANT WORK"
Variant work procedure was
changed
Variant work procedure was
changed
2021
Ascent
Body Electrical
Instrumentation
"Body & Electrical/WIRING
SYSTEM
> INSTRUMENTATION/
DRIVER INFO
> Combination Meter System
> OPERATION
> VARIANT WORK"
2022
Ascent
New Car Info
General Description
1-6,9-2,9-4,9-6
Illustrations and descriptions were
deleted
Front Suspension
"Suspension
> FRONT SUSPENSION
> General Description
> COMPONENT
> FRONT SUSPENSION"
Illustrations and descriptions were
changed.
Rear Suspension
"Suspension
> REAR SUSPENSION
> General Description
> COMPONENT
> REAR SUSPENSION"
Illustrations and descriptions were
changed.
Engine Diagnostics
"DIAGNOSTICS
> ENGINE (DIAGNOSTICS)
(w/o STI)
> Diagnostic Procedure with
Diagnostic Trouble Code
(DTC)
> DTC P113A O2 SENSOR
CIRCUIT (OPEN) (BANK1
SENSOR2)"
Step 5 description was changed
Front Suspension
"Suspension
> FRONT SUSPENSION
> General Description
> COMPONENT
> FRONT SUSPENSION"
Illustrations and descriptions were
changed.
Rear Suspension
"Suspension
> REAR SUSPENSION
> General Description
> COMPONENT
> REAR SUSPENSION"
Illustrations and descriptions were
changed.
Front Suspension
"Suspension
> FRONT SUSPENSION
> General Description
> COMPONENT
> FRONT SUSPENSION"
Illustrations and descriptions were
changed.
Rear Suspension
"Suspension
> REAR SUSPENSION
> General Description
> COMPONENT
> REAR SUSPENSION"
Illustrations and descriptions were
changed.
Suspension
2015
WRX /
WRX STI
Diagnostics
2016
2017
WRX /
WRX STI
WRX /
WRX STI
Suspension
Suspension
Bulletin Number: 18-199-21; Date: 04/06/22
Page 2 of 3
YEAR
2018
2019
2020
MODEL
WRX /
WRX STI
WRX /
WRX STI
WRX /
WRX STI
SECTION
SUB-SECTION
PAGE or CHAPTER
DESCRIPTION OF CHANGE
Front Suspension
"Suspension
> FRONT SUSPENSION
> General Description
> COMPONENT
> FRONT SUSPENSION"
Illustrations and descriptions were
changed.
Rear Suspension
"Suspension
> REAR SUSPENSION
> General Description
> COMPONENT
> REAR SUSPENSION"
Illustrations and descriptions were
changed.
Front Suspension
"Suspension
> FRONT SUSPENSION
> General Description
> COMPONENT
> FRONT SUSPENSION"
Illustrations and descriptions were
changed.
Rear Suspension
"Suspension
> REAR SUSPENSION
> General Description
> COMPONENT
> REAR SUSPENSION"
Illustrations and descriptions were
changed.
Front Suspension
"Suspension
> FRONT SUSPENSION
> General Description
> COMPONENT
> FRONT SUSPENSION"
Illustrations and descriptions were
changed.
Suspension
Suspension
Suspension
Bulletin Number: 18-199-21; Date: 04/06/22
Page 3 of 3