GROUP
ENGINE
DATE

Technical Service Bulletin
SUBJECT:

June, 2021

NUMBER
21-EM-008H
MODEL(S)
Tucson (TL)
Santa Fe Sport (AN)
Santa Fe (TM)
Sonata (LF)
Veloster N (JSN)

INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

Description: This bulletin provides additional service diagnostic information and repair procedures
related to Variable Charge Motion Controllers (VCM) equipped in the applicable vehicles listed below.
This bulletin also provides information on the use of the Service Kit for 2.4L equipped engines, which
enables replacing the VCM Lever Arm without replacing the complete Intake Manifold Assembly.
Refer to the applicable Engine Control / Fuel System sections in the Shop Manual, and then follow
the procedures outlined in this bulletin whenever a vehicle with the following symptom(s) are being
diagnosed:
 Check Engine Light illumination with VCM related DTC.
 Unstable engine RPM and reduced engine power.
 Abnormal noise from the intake manifold whenever engine RPM is raised from idle speed.
Component Overview:
The Variable Charge Motion Controller has 2 major segments that assist each other during operation.
VCM Motor/Actuator

Actuator Rod and Lever Arm

o The VCM Motor/Actuator is
connected to a Rod and Lever Arm.
o This Lever Arm is also connected
to the linkage that controls the air
flaps to manage the Intake Manifold
air flow.
o During low and mid RPM range, the
tumbling of air that flows into the
cylinder is reinforced.
o This improves the engine
combustion performance and also
enhances the engine torque.

Applicable Vehicles:
 Certain 2015-2019MY Sonata (LF) vehicles with 2.0L Turbo and 2.4L engines.
 Certain 2017-2018MY Santa Fe Sport (AN) vehicles with 2.0L Turbo and 2.4L engines.
 Certain 2019-2020MY Santa Fe (TM) vehicles with 2.0L Turbo and 2.4L engines.
 Certain 2018-2021MY Tucson (TL) vehicles with 2.4L engines.
 Certain 2019-2022MY Veloster N (JSN) vehicles with 2.0L Turbo engines.

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT:

INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

Parts Information:
MODELS

PART NAME

FIGURE

PART NUMBER

2.4L
Sonata (LF)
Tucson (TL)
Santa Fe Sport (AN)
Santa Fe (TM)

NOTES

28323-2GGA1

2.0T
Santa Fe Sport (AN)
Sonata (LF)
Santa Fe (TM)

VCM Motor

28323-2GTA1

2.0T
Veloster N (JSN)

Replace
According to
Inspection
Results

28323-2GPD0

VCM Service Kit Information:
PART NUMBER
FIGURE

NOTES
VCM Service Kit includes:
 Rod
 Lever Arm
 Clip
 K-Ring

2.4L
28399-2GGA0

NOTE: K-Ring is available separately as 282312GGA0 if only that part is required.

Note: VCM Service Kit only applies to vehicles equipped with 2.4L engines.
Warranty Information:
MODEL

OP CODE

OPERATION

OP TIME

CAUSAL
PART

Sonata (LF)
Refer to
Tucson (TL)
MOTOR ASSY WEBLTS Refer to
Santa Fe (TM)
28325R00 VARIABLE CHARGE
for
Parts
Santa Fe Sport (AN)
MOTION (VCM)
current Information
Veloster N (JSN)
LTS time

NATURE CAUSE
CODE
CODE

I3T

ZZ3

Note: Normal Warranty Applies.

TSB #: 21-EM-008H

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SUBJECT:

INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

VCM and Intake Manifold Component Information:
MODEL

2.4L
Sonata (LF)
Tucson (TL)
Santa Fe Sport (AN)
Santa Fe (TM)

① VCM
② ETC
③ BPS
④ PCSV
⑤ VIS Sol.
⑥ VIS Act.

FIGURE

① ④

⑥
⑤

2.0T
Sonata (LF)
Santa Fe (TM)
Santa Fe Sport (AN)

③

① VCM
② ETC
③ BPS
④ PCSV

③

②

④

①
②

2.0T
Veloster N (JSN)

① VCM
② ETC
③ BPS
④ PCSV
⑤ ATS

⑤

③

①

④

②
Index:
ATS – Ambient Temperature Sensor
BPS – Boost Control Sensor
ETC – Electronic Throttle Control
PCSV – Pressure Control Solenoid Valve
VCM – Variable Charge Motion Actuator
VIS – Variable Intake System

TSB #: 21-EM-008H

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SUBJECT:

INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

Troubleshooting Flow Diagram:

Fault Code Inspection:
DTC
P2016
P2017
P2018
P2004
P2006

P200A

DESCRIPTION
Sensor signal SCG
SCP/OC
Noise Detected
from sensor signal
Sensor signal:
Open Fixed
Sensor signal:
Closed Fixed
Sensor signal:
Abnormal Range
- Initial learning failure
- Driven learning failure
- Endurance error

CONTROL
RPM and Torque
are limited
Normal Engine control
- Control Flap in closed
position
- RPM and Torque are
limited
Normal Engine Control

Max Duty Time Over
Contamination error
P2008
P2009
P2010

Driver IC error
(ECU or VCM)

MIL
1 Drive Cycle
2 Drive Cycles
1 Drive Cycle
1 Drive Cycle

2 Drive Cycles

1 Drive Cycle
1 Drive Cycle

TSB #: 21-EM-008H

HOLD locked in VCM
closed position

1 Drive Cycle

2 Drive Cycles
- Control Flap in closed
position
- RPM and Torque are
limited

NOTES
HOLD locked in VCM
closed position
Fault detected,
normal VCM control

Fault detected,
normal VCM control
HOLD fixed in VCM
closed position
3 counters. HOLD
Fixed in VCM closed
position
HOLD Fixed in VCM
closed position

Page 4 of 9
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SUBJECT:

INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

VCM Actuation Test using GDS:
1. Select Actuation Test from the GDS tool.

2. Select VCM Motor (Option).

3. Under Data Analytics select:
 PWM at VCM actuator (Option)
 Voltage input from VCM feedback sensor
 Run the test by selecting Start.

TSB #: 21-EM-008H

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INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

4. Check the Voltage input from VCM feedback sensor.
If the Voltage is not within the ideal sensor range,
replace the VCM Motor. Do not replace the entire
Intake Manifold Assembly.

5. End the test by selecting Stop.

6. For VCM Motor, linkage or flap related code:
 Check for obstructions in the port flap.
 In addition, check for any protrusions of the
installed metal dividers of the cylinder head intake
ports which may interfere with VCM port flap
movement. Reinsert any protruding port dividers
fully into the cylinder head intake port if necessary.

TSB #: 21-EM-008H

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INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

7. Check for damage, deformation, rust, and obstructions on the VCM Rod and Lever Arm
Assembly. Ensure that the assembly is not stuck in place.
DAMAGED ROD

DAMAGED LEVER ARM

DEFORMED ROD

Prevent damage to the Rod by not
twisting it during removal.

Prevent Lever Arm
damage by ensuring it is
disassembled before
removing the VCM

Prevent Rod-Side pivot ball post
damage by removing the Lever
Arm from the vehicle side first.

NOTICE
(For 2.4L only)
If the Rod or Lever Arm Assembly is damaged, replace it by using the VCM Service Kit.
Do not replace the entire Intake Manifold Assembly.

TSB #: 21-EM-008H

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SUBJECT:

INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

Service Procedure:
1. Turn off the engine and remove the negative terminal
from the battery.

NOTICE
Be sure to record the radio presets prior to battery disconnection.
2. Remove the first section of the air cleaner (A).

A

3. Remove the second section of the air cleaner (B).

B

4. Loosen and remove the fixing bolt and remove the
purge pipe hose to allow easy VCM service access.
C

NOTICE
Location of purge pipe hose will
vary depending on engine
specifications.

TSB #: 21-EM-008H

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INTAKE MANIFOLD VCM DIAGNOSIS AND REPAIR GUIDELINES

5. Remove the PCSV fixing bolt (D) to help create more
clearance for removing the lever arm or VCM.
D

6. Disconnect VCM connector (E).
If VCM is damaged, disconnect VCM connecting bolts
(F) with a 10mm Socket Wrench.
E

NOTICE
Tightening Torque:
95 lb-in (10.8 Nm)

F

7. Remove and replace the VCM Motor as needed.
 Remove K Ring and position rod away from
VCM Motor to prevent Lever Arm damage.
 Remove VCM rod clip (G) and remove the link
flap connection (H) with a Flat Head
Screwdriver.
(For 2.4L only) If the Rod or Lever Arm Assembly is
damaged, replace it by using the VCM Service Kit.
Do not replace the entire Intake Manifold Assembly.

G

H

8. Reinstall parts in reverse order of disassembly.

NOTICE
Reprogram the radio presets recorded from Service Procedure Step #1 on page 8.

9. The Service Procedure is now complete.

TSB #: 21-EM-008H

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