NHTSA ID Number: 11036208
Manufacturer Communication Number: 26-01-026H-1 TSB
TSB/Document Date: 2026-08-15
Summary
Certain Palisade (LX3) and Palisade Hybrid
(LX3 HEV) vehicles may exhibit a “Check Active Air Flap System” warning message, Engine MIL ON, and/or “Low Engine Oil” warning message, due to improper operation of the Active Air Flap (AAF) system. DTCs include, but are not limited to: P05AE00, P05B100, P05B200, P05B400, P05FE00, P15A200, P15A500, P2C7400, U028500, U028B00, and/or U100800. This condition may be caused by water ingress and corrosion at the wiring connections for the lower AAF actuators and/or sensors. This bulletin contains instructions to inspect the front bumper wiring connectors, AAF actuators, and sensors for water ingress and corrosion, and to replace them if necessary.
proceed to step 5.
•
FAIL: If damage is found in either
inspection (step 3 or 4), proceed to the
Front Bumper Removal section.
FAIL
NOTICE
If any corrosion or sign of water ingress
is found, even if it is minor, the inspection
is still a FAIL.
If any corrosion or signs of water ingress
are found on the RH side, full parts list
replacement is needed (see flowchart).
Before proceeding with bumper removal,
check for part availability.
TSB #: 26-01-026H-1
Page 9 of 20
SUBJECT:
5.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
DIGITAL
DOCUMENTATION
Using the STUI camera function, take a
photo of the clean LH front bumper wiring
connector.
Upload the photo to STUI.
NOTE: If the STUI camera function is
NOT used, write the last 6 digits of the
VIN and date of repair on a piece of
paper to include in the photo.
6.
Reinstall all parts in the reverse order of the
removal process.
7.
Lower the vehicle.
8.
Use the GDS to clear any DTCs.
9.
The service procedure is now complete.
TSB #: 26-01-026H-1
Page 10 of 20
SUBJECT:
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
Front Bumper Removal
1.
Lower the vehicle.
2.
Disconnect the battery (–) terminal (A).
Tightening Torque:
3.
lb-ft
6.5
lb-in
78
N.m
8.8
A
Visually check that the lift blocks are properly
seated on the vehicle support points and
partially raise the vehicle.
NOTICE
Raising the vehicle from anywhere other
than the support points may damage
vehicle components.
Refer to the shop manual:
• General Information > Lift and
Support Points > General Information
4.
Place a protective mat on the floor under the
front bumper to prevent scratches.
TSB #: 26-01-026H-1
Page 11 of 20
SUBJECT:
5.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
Remove the 2 front bumper bolts (B).
Tightening Torque:
6.
lb-ft
7.3
lb-in
87
N.m
9.8
B
Remove the clips and screws on the side of
the front bumper (C).
2
Pull up then out (1 then 2) to detach the side of
the front bumper.
NOTICE
Be careful to avoid damaging the side of
the front bumper after it is detached.
7.
Disconnect the front bumper main
connector (D).
TSB #: 26-01-026H-1
C
1
D
Page 12 of 20
SUBJECT:
8.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
Insert hands into the slots of the grille on both
sides of the front view camera (E).
NOTICE
Be careful to avoid damaging the grille
while removing the front bumper.
E
9.
Lift the grille upward then pull it forward
(1 then 2) in the perpendicular direction to
remove the front bumper from the vehicle.
NOTICE
When removing the front bumper, pulling
the grille in the perpendicular direction
without lifting it first will damage the
grille.
1
2
Place the removed front bumper on the
protective mat.
TSB #: 26-01-026H-1
Page 13 of 20
SUBJECT:
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
AAF Sensor Inspection
1.
Disconnect the front bumper wiring & AAF
actuator connectors (A) and the sensor
connectors (B).
A
B
A
If BOTH LH and RH sides received a FAIL
during the initial inspection, then skip to the
Replacement of Front Bumper Harness,
AAF Actuator(s), & AAF Sensor(s) section.
LH/RH Sensor &
Wiring Connectors
B
TSB #: 26-01-026H-1
Page 14 of 20
SUBJECT:
2.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
Visually check the LH and RH sensor
connectors for water ingress or corrosion.
PASS
NOTICE
If the RH side received a PASS from the
Front Bumper Wiring & AAF Actuator Pin
Inspection, but the RH sensor is found to
have water ingress or corrosion, then
BOTH LH and RH parts are in need of
replacement.
FAIL
Corrosion
TSB #: 26-01-026H-1
Page 15 of 20
SUBJECT:
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
Replacement of Front Bumper Harness, AAF Actuator(s), & AAF Sensor(s)
1.
DIGITAL
DOCUMENTATION
Using the STUI camera function, take a
photo of the LH AAF actuator pins.
Upload the photo to STUI.
NOTE: If the STUI camera function is
NOT used, write the last 6 digits of the
VIN and date of repair on a piece of
paper to include in the photo.
2.
Remove the front bumper wiring connectors,
clips, and wiring (A).
A
3.
Remove the 6 screws from the affected
side(s) and remove the AAF assembly (B).
NOTICE
B
Refer to the Flowchart for overview of
inspection results to determine which
assemblies need to be removed.
TSB #: 26-01-026H-1
Page 16 of 20
SUBJECT:
4.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
If ONLY the LH side is affected by water
ingress or corrosion, then remove ONLY the
LH AAF actuator (C) and sensor (D) by
removing the mounting screws (E and F).
F
If the RH side is affected by water ingress or
corrosion, then remove BOTH the LH and RH
AAF actuators (C) and sensors (D) by
removing the mounting screws (E and F).
C
F
D
E
5.
Install the new actuator(s) and sensor(s) onto
their assembly(s), then reinstall the
assembly(s) and new front bumper harness to
the front bumper.
TSB #: 26-01-026H-1
Page 17 of 20
SUBJECT:
6.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
DIGITAL
DOCUMENTATION
Using the STUI camera function, take a
photo of the completely assembled front
bumper.
Upload the photo to STUI.
NOTE: If the STUI camera function is
NOT used, write the last 6 digits of the
VIN and date of repair on a piece of
paper to include in the photo.
TSB #: 26-01-026H-1
Page 18 of 20
SUBJECT:
7.
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
Reinstall all parts in the reverse order of the
removal process.
NOTICE
When reinstalling the front bumper onto
the vehicle, use both hands to apply
pressure to the grille on both sides of the
front camera, then push both ends of the
grille into the vehicle to secure the front
bumper.
After installation, inspect the front bumper
for any damage or gaps.
8.
Use the GDS to clear any DTCs.
9.
The service procedure is now complete.
TSB #: 26-01-026H-1
Page 19 of 20
ACTIVE AIR FLAP WIRING ASSEMBLY INSPECTION & REPLACEMENT
(LIMITED COVERAGE CAMPAIGN LA13)
SUBJECT:
Appendix – Op Code/Parts Reimbursement
Palisade (LX3) – Part Reimbursement by Op Code
Op
Code/Part
s
86989P9100QQH
(Actuator Active Air,
LH)
50D310R2
50D310R3
50D310R4
50D310R5
50D310RD
50D310RE
50D310RF
50D310RG
1
1
1
1
1
1
1
1
86999P9100QQH
(Actuator Active Air,
RH)
8697AR6000QQH
(Sensor Active Air
Flap)
1
1
1
1
1
1
1
1
2
2
2
2
91890P9BE0QQH
(Wiring
Harness Front
Bumper)
9189091891P9BH0QQH P9AC0QQH
(Wiring
(Wiring
Harness Harness Front
Front
Bumper)
Bumper)
91890P9AL0QQH
(Wiring
Harness Front
Bumper)
1
1
1
1
1
Qty
1
1
1
Palisade Hybrid
(LX3 HEV) – Part Reimbursement by Op Code
Op
Code/Parts
86989DU100QQH
(Actuator Active Air,
LH)
50D310RK
50D310RL
50D310RM
50D310RU
50D310RV
50D310RW
1
1
1
1
1
1
TSB #: 26-01-026H-1
86999DU100QQH
(Actuator Active Air,
RH)
8697AR6000QQH
(Sensor Active Air
Flap)
91890P9BH0QQH
(Wiring
Harness - Front
Bumper)
1
1
1
1
1
1
1
2
2
2
91891P9AC0QQH
(Wiring
Harness - Front
Bumper)
91890P9AL0QQH
(Wiring
Harness - Front
Bumper)
1
1
1
Qty
1
1
Page 20 of 20
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TSB/Document ID: 26-01-026H-1 TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2026-08-07
MFR Internal Campaign ID/Software Version: LA13
Communication Type: Warranty Program/Extension
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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