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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
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SERVICE MANAGER

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SERVICE BULLETIN
APPLICABILITY: 2017MY Impreza

2015-17MY WRX and WRX STI

NUMBER: 06-65-18R

SUBJECT:

REVISED: 07/16/19

DATE: 09/24/18

“Clicking” or “Ticking” Sound from VDC
Hydraulic Control Unit

INTRODUCTION:
This bulletin announces a new Vehicle Dynamics Control (VDC) Module and Hydraulic Control
Unit (VDCCM&HCU). The new part was designed to address a small number of customer concerns
regarding a clicking or ticking-type sound heard coming from the driver’s side footrest area. The new
modules incorporate logic with enhanced internal solenoid and motor control characteristics.
PRODUCTION CHANGE INFORMATION:
The new control unit was incorporated into production on WRX and WRX STI starting with VIN
H9840542. This bulletin will be revised with the Impreza starting VINs when they become available.
PART INFORMATION:
Description
HYDRAULIC UNIT
ASSEMBLY- V/CONT

Part Number

Applicability

27596VA073

2017MY WRX & WRX STI**

27596FL00B

2017MY IMPREZA w/out EyeSight

27596FL01B

2017MY IMPREZA w/ EyeSight

**Models with EyeSight ONLY

SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.

Step 1: Always confirm the customer’s concern.
•

Scenario 1: After confirming the customer’s concern, open the hood and verify the sound is
actually coming from the VDCCM&HCU and not another component.
Continued...

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.

Bulletin Number: 06-65-18R; Revised: 07/16/19

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.

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Step 2: Connect the SM4 and access data monitoring for the Brake Control system. Select the data
for Motor Relay Signal and Motor Relay Monitor Voltage (V) as shown in the image below.
•

Scenario 2: Inspect the value for Motor Relay Monitor Voltage. If any “spikes” of voltage
exceeding 0.2v are identified while the Motor Relay Signal shows either ON or OFF, the
VDCCM&HCU must be replaced.

Step 3: If either Scenario 1 or 2 described above is confirmed, the VDCCM&HCU must be
replaced.
The service procedure for replacing the VDCCM/HCU remains unchanged. Always refer to the
applicable Service Manual and review the full requirements of the repair being performed. The
Service Manual procedures contain information critical to performing an effective repair the first
time and every time. This includes but is not limited to: important SAFETY precautions, proper
inspection criteria, necessary special tools, required processes and related one-time-use parts needed
for a complete and lasting repair.
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited Warranty period or covered by an active Subaru
Added Security Classic or Gold plan, this repair may be submitted using the following claim
information:
Labor Description

Labor Operation #

Labor Time

ABS/VDC HYDRAULIC CONTROL UNIT R&R

B536-301

1.2

ABS/VDC SYSTEM TESTING & DIAGNOSIS

C566-300

0.5

Fail Code
QCP-42

Continued...
Bulletin Number: 06-65-18R; Revised: 07/16/19

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IMPORTANT REMINDERS:
•

SOA strongly discourages the printing and/or local storage of service information as
previously released information and electronic publications may be updated at any time.

•

Always check for any open recalls or campaigns anytime a vehicle is in for servicing.

•

Always refer to STIS for the latest service information before performing any repairs.

Bulletin Number: 06-65-18R; Revised: 07/16/19

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