LSB004323

L-SB-0043-23
August 21, 2023
Air Conditioning Leak Detection Dye and O-ring Joint
Inspection
Service
Category
Vehicle Interior
Section
Heating/Air Conditioning
Market USA and
Mexico
Applicability
YEAR(S)
MODEL(S)
2013 - 2018
CT200H, GS450H
2022 - 2023
ES250, IS500, LX600,
NX250, NX350, NX450H+
2013 - 2023
ES300H, ES350, GX460,
IS350, RX350
2016 - 2020
GS F
2016 - 2017
GS200T, IS200T, RC200T
2018 - 2019
GS300
2013 - 2020
GS350
2013 - 2014
IS F
2013 - 2015
IS250, IS250C, IS350C
2016 - 2023
IS300
2018 - 2023
LC500, LC500H, LS500,
LS500H, RC300
2021 - 2023
LC500C
2012
LFA
2013 - 2017
LS460
2013 - 2016
LS600H
2013 - 2021
LX570
2015 - 2017
NX200T
2018 - 2021
NX300
2015 - 2021
NX300H
ADDITIONAL INFORMATION
© 2023 Lexus, a division of Toyota Motor Sales, USA
Page 1 of 24
L-SB-0043-23
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
2015 - 2023
RC F, RC350
2023
RX350H, RX500H, RZ450E
2024
RX450H+
2013 - 2022
RX450H
2019 - 2022
UX200
2019 - 2023
UX250H
Introduction
The air conditioning dye injection tool kit has been developed to aid in identifying the location of air
conditioning refrigerant leaks. Follow the procedures outlined in this service bulletin to aid in
locating, inspecting, and repairing refrigerant leaks.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
Page 3 of 24
Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Table of Contents


Warranty Information ...............................................................................................................4

For USA Market .................................................................................................................4

For Mexico Market .............................................................................................................4
Parts Information .....................................................................................................................4

For USA and Mexico Markets.............................................................................................4

Required Tools & Equipment ...................................................................................................5

Air Conditioning Leak Detection Dye and injection Tool Use....................................................6

HVAC O-ring Joint Inspections .............................................................................................. 12


Inspect the Pipe Fitting Areas of the Expansion Valve and Evaporator............................. 12

Inspect the Condenser and Pipe Fitting Area ................................................................... 16

Inspect the Compressor and Pipe Fitting Area ................................................................. 18

Inspect Other Joint Areas ................................................................................................. 20
Judgement Criteria ................................................................................................................ 22

O-ring Abnormalities......................................................................................................... 22

Sealing Surface Abnormalities (O-ring Attachment Area) ................................................. 23

Sealing Surface Abnormalities (Part Joint Area) ............................................................... 24
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Warranty Information
For USA Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
N/A
Not Applicable to Warranty
–
–
–
–
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
N/A
Not Applicable to Warranty
–
–
–
–
For Mexico Market
Parts Information
For USA and Mexico Markets
PART NUMBER
PART NAME
QTY
09874-20010*
Oil Capsule, ND-11, Fluorescence
2
09874-10010*
Oil Capsule, ND-12, Fluorescence
2
*The dye part numbers are for Denso air conditioning systems ONLY.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Required Tools & Equipment
The table below shows a list of the components included in the air conditioning dye injection tool kit
if ANY of the components requires replacement.
Table 1.
SPECIAL SERVICE TOOL (SST)
TOOL KIT
REFRIGERANT TYPE /
DESCRIPTION
SUB-PART
NUMBERS
R-134a / Brass Coupler*
09870-10010-Y
R-1234yf / Brass Coupler*
09870-20010-Y
R-134a / Brass Coupler*
09870-10010-B
R-1234yf / Brass Coupler*
09870-20010-B
–
Injector Handle*
09870-TP9845
–
Ultraviolet (UV) Flashlight*
09870-TPOPUVP
–
Flashlight Charger*
09870-0TP14
–
GLO-AWAY + Dye Cleaner*
09870-0TP19
–
Yellow Glasses*
09870-TP9940
–
Case*
09870-CASE
DYE TYPE
ND-11
(09874-20010)
ND-12
(09874-10010)
09870DYEKIT*
*Essential SST.
NOTE
Replacement components may be ordered by calling Approved Dealer Equipment (ADE) at
1-800-368-6787 (USA) or 01-55-50103041 (Mexico).
© 2023 Lexus, a division of Toyota Motor Sales, USA
IMAGE
L-SB-0043-23
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Required Tools & Equipment (continued)
REQUIRED TOOLS & MATERIAL
QTY
R1234YF A/C Machine
1
R134A A/C Machine
1
Air Conditioning Leak Detection Dye and Injection Tool Use
CAUTION
 Do NOT look directly into the UV flashlight and ALWAYS wear UV protection glasses.
 Wear safety glasses when connecting/disconnecting the dye injection tool from the air
conditioning service port.
 Do NOT operate the air conditioning system while the dye injection tool is connected to air
conditioning system.
 Do NOT connect the dye injection tool to a system that is evacuated.
 The air conditioning system MUST contain enough refrigerant to operate the compressor and
circulate the fluorescence dye to find leaks.
 Do NOT mix ND-11 and ND-12 fluorescence dyes. ALWAYS use the fluorescence dye
cartridge with the designated injector tool brass coupler.
 After use, store the injector tool and fluorescence cartridges in a cool place, away
from sunlight.
 Dispose of ANY fluorescence dye in accordance with all local, state, and federal regulations.
NOTE
Two dye cartridges are required per vehicle service. The first cartridge will be completely purged through
the brass coupler to ensure there are NO contaminants such as moisture, air, etc. The second cartridge
will be injected into the air conditioning system to inspect for leaks.
1. The air conditioning dye injection tool kit includes four brass couplers to accommodate
vehicles for the types of compressor oils and refrigerants, refer to the Required Tools &
Equipment section for details:

ND-11 with R-134a compressor oil; electric compressors (09870-10010-Y)

ND-11 with R-1234yf compressor oil; electric compressors (09870-20010-Y)

ND-12 with R-134a compressor oil; belt driven compressors (09870-10010-B)

ND-12 with R-1234yf compressor oil; belt driven compressors (09870-20010-B)
NOTE
 ND-12 compressor oil is compatible with ND-8 oil systems.
 ND-8 compressor oil is NOT compatible with ND-12 oil systems.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Air Conditioning Leak Detection Dye and Injection Tool Use (continued)
2. Identify the compressor oil and refrigerant
system type by looking at the under-hood
air conditioning label for the compressor oil
and refrigerant type the vehicle is using
and select the corresponding dye injector
tool brass coupler.
Figure 1.
1
c
3. Prepare the dye injection tool with the
fluorescence dye cartridge by removing the
large cap from the first cartridge.
2
c
1
Compressor Oil
2
Refrigerant Type and System Charge Amount
Figure 2.
1
c
2
c
4. Completely unscrew the handle on the
injector and screw the dye cartridge into it.
NOTE
When screwing on the dye cartridge to the
injector handle, make sure the piston rod
remains in the fully unscrewed position.
1
Large Cap
2
Dye Injection Tool
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Air Conditioning Leak Detection Dye and Injection Tool Use (continued)
5. Remove the purge fitting from the brass
coupler and hold the cartridge vertically
with the small cap on top.
Figure 3.
3
c
1
c
6. Remove the cap and screw the cartridge
firmly to the brass coupler.
2
c
7. Insert the purge fitting into the
brass coupler.
8. AFTER the purge fitting is installed,
continue holding the dye injection tool in
the vertical position to avoid dye form
leaking out until the purge process
is complete.
1
Purge Fitting
2
Brass Coupler
3
Hold Cartridge Vertically
9. Turn the handle to advance the plunger
until it stops, passing all the dye out of
the cartridge.
10. Remove the purge fitting from the
brass coupler.
11. Completely unscrew the handle on the
injector and unscrew the first empty
cartridge from the brass coupler
and dispose.
12. Install the second cartridge onto the
brass coupler.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Air Conditioning Leak Detection Dye and Injection Tool Use (continued)
13. Install the purge fitting to the brass coupler
and turn the handle to advance the plunger
until a small amount of fluorescent dye
exits the purge fitting.
Figure 4.
1
c
1
Fluorescent Dye
14. Remove the purge fitting. The injection tool
assembly is now purged and ready for use.
15. Connect the brass coupler to the low side
service port.
Figure 5.
NOTE
Wrap the coupler connection with a shop rag
as a small amount of fluorescence dye may
spray out due to refrigerant pressure.
2
c
1
c
1
Brass Coupler
2
Low Side Service Port
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Air Conditioning Leak Detection Dye and Injection Tool Use (continued)
16. Turn the plunger clockwise to inject all the
dye into the vehicle.
Figure 6.
1
c
1
Turn Clockwise
17. Disconnect the brass coupler from the service port and wipe both clean.
NOTE
Wrap the coupler connection with a shop rag as a small amount of fluorescence dye may spray out
due to refrigerant pressure.
18. Start the engine, turn the air conditioning switch ON, set the temperature to MAX COOL, and run
the compressor for 10 minutes to circulate the fluorescence dye through the system.
19. Turn OFF the air conditioning and engine.
Put on UV glasses and check for
refrigerant leaks along the air conditioning
system components while shining the
UV light.
Figure 7.
1
c
HINT
 Areas where there are refrigerant leaks
will glow in a bright yellow green.
 For smaller leaks, operate the air
conditioning system over the next 24 to
48 hours and reinspect periodically.
1
UV Lamp
20. AFTER the leaks are repaired, use the GLO-AWAY, dye cleaner, and UV flashlight to clean the
area and ensure NO dye remains.
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Air Conditioning Leak Detection Dye and Injection Tool Use (continued)
Figure 8. Refrigerant Line
A
c
C
A
C
B
C
A
2
3
4
A
B
1
B
D
5
D
A
A
A
A
B
When leaking occurs around “A”: Refer to the Inspect the Pipe Fitting Areas of the Expansion Valve and
Evaporator subsection.
When leaking occurs around “B”: Refer to the Inspect the Condenser and Pipe Fitting Area subsection.
C
When leaking occurs around “C”: Refer to the Inspect the Compressor and Pipe Fitting Area subsection.
D
When leaking occurs around “D”: Refer to the Inspect Other Joint Areas subsection.
1
Condenser
2
Compressor
3
Evaporator
4
Expansion Valve
5
Rear Air Conditioner
A
© 2023 Lexus, a division of Toyota Motor Sales, USA
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August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections
Inspect the Pipe Fitting Areas of the Expansion Valve and Evaporator
NOTICE
 Do NOT reuse the O-rings once they are removed.
 As there may be a malfunction in multiple components, make sure to complete ALL steps and
replace ALL parts in which defects are found.
 If no malfunction is found in ANY related parts, a temporary leak may have occurred due to
foreign matter on an O-ring, deformation, etc.
1. Remove the pipes from the
expansion valve.
Figure 9.
NOTICE
 Wipe off the joint area with a clean cloth
BEFORE disassembly.
 Slowly remove the pipes straight to
prevent the sealing face from being
damaged and foreign materials from
dropping off.
2. Inspect the ENTIRE O-ring surfaces
making sure they are free from defects,
such as damage (cuts, dents, or crushed
areas), foreign material adhesion, or twists.
If there are ANY defects, clean or replace
the part. Refer to the O-ring Abnormalities
subsection for judgement criteria.
2
1
Pipe
2
Expansion Valve
Figure 10.
1
NOTICE
 Inspect the O-ring surfaces in a
well-lit area.
 When it is difficult to inspect the
surface conditions due to oil adhesion,
degrease the surface (such as by
wiping it with a clean white cloth). Make
sure NOT to lose any foreign material
that was adhering to the surface that
may indicate the source of the leak.
1
O-ring
© 2023 Lexus, a division of Toyota Motor Sales, USA
1
L-SB-0043-23
August 21, 2023
Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Pipe Fitting Areas of the Expansion Valve and Evaporator (continued)
3. Remove the O-rings and inspect the entire
pipe surfaces making sure they are free
from defects, such as foreign material
adhesion, damage, or corrosion. If there
are ANY defects, clean or replace the part.
Refer to the Sealing Surface Abnormalities
(O-ring Attachment Area) subsection for
judgment criteria.
Figure 11.
1
NOTICE
When removing the O-rings, use soft
tools (such as a toothpick) to avoid
damaging the sealing face or the O-ring.
1
4. Inspect the ENTIRE sealing surfaces of the
expansion valve (pipe side) making sure
they are free from defects, such as foreign
material adhesion, damage, or corrosion. If
there are ANY defects, clean or replace the
part. Refer to the Sealing Surface
Abnormalities (Part Joint Area) subsection
for judgment criteria.
Sealing Surface
Figure 12.
1
NOTICE
When it is difficult to check the surface
conditions due to oil adhesion, degrease
the surface (such as by wiping it with a
clean white cloth). Make sure NOT to lose
any foreign material that was adhering to
the surface that may indicate the source
of the leak.
1
Sealing Surface
© 2023 Lexus, a division of Toyota Motor Sales, USA
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Pipe Fitting Areas of the Expansion Valve and Evaporator (continued)
5. Remove the expansion valve from
the evaporator.
Figure 13.
1
NOTICE
 Slowly remove the pipes straight to
prevent the sealing face from being
damaged and foreign materials from
dropping off.
 If the expansion valve is difficult to
remove, gently move it up and down
and right to left for removal.
6. Inspect the ENTIRE sealing surfaces of the
expansion valve (evaporator side) making
sure they are free from defects, such as
foreign material adhesion, damage, or
corrosion. If there are ANY defects, clean
or replace the part. Refer to the Sealing
Surface Abnormalities (Part Joint Area)
subsection for judgment criteria.
1
Evaporator
2
Expansion Valve
Figure 14.
NOTICE
When it is difficult to inspect the surface
conditions due to oil adhesion, degrease
the surface (such as by wiping it with a
clean white cloth). Make sure NOT to lose
any foreign material that was adhering to
the surface that may indicate the source
of the leak.
1
1
Sealing Surfaces
© 2023 Lexus, a division of Toyota Motor Sales, USA
2
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Pipe Fitting Areas of the Expansion Valve and Evaporator (continued)
7. Inspect the ENTIRE O-ring surfaces of the
evaporator making sure they are free from
defects, such as damage (cuts, dents, or
crushed areas), foreign material adhesion,
or twists. If there are ANY defects, clean or
replace the part. Refer to the O-ring
Abnormalities subsection for
judgement criteria.
Figure 15.
1
NOTICE
 Inspect the O-ring surfaces in a
well-lit area.
 When it is difficult to inspect the
surface conditions due to oil adhesion,
degrease the surface (such as by
wiping it with a clean white cloth). Make
sure NOT to lose any foreign material
that was adhering to the surface that
may indicate the source of the leak.
8. Inspect the ENTIRE evaporator surface by
remove the O-rings making sure they are
free from defects, such as foreign material
adhesion, damage, or corrosion. If there
are ANY defects, clean or replace the part.
Refer to the Sealing Surface Abnormalities
(O-ring Attachment Area) subsection for
judgment criteria.
1
O-rings
Figure 16.
1
NOTICE
When removing the O-rings, use soft
tools (such as a toothpick) to avoid
damaging the sealing face or the O-ring.
1
Sealing Surfaces
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Condenser and Pipe Fitting Area
NOTICE
 Do NOT reuse the O-rings once they are removed.
 As there may be a malfunction in multiple components, make sure to complete ALL steps and
replace ALL the parts in which defects are found.
 If no malfunction is found in ANY related parts, a temporary leak may have occurred due to
foreign matter on an O-ring, deformation, etc.
1. Remove the discharge and liquid pipes
from the condenser.
Figure 17.
NOTICE
 Wipe off the joint area with a clean cloth
before disassembly.
 Slowly remove the pipes straight to
prevent the sealing face from being
damaged and foreign materials from
dropping off.
2. Inspect the ENTIRE O-ring surfaces
making sure they are free from defects,
such as damage (cuts, dents, or crushed
areas), foreign material adhesion, or twists.
If there are ANY defects, clean or replace
the part. Refer to the O-ring Abnormalities
subsection for judgement criteria.
1
2
1
Discharge Side
2
Liquid Side
Figure 18.
1
NOTICE
 Inspect the O-ring surfaces in a
well-lit area.
 When it is difficult to inspect the
surface conditions due to oil adhesion,
degrease the surface (such as by
wiping it with a clean white cloth). Make
sure NOT to lose any foreign material
that was adhering to the surface that
may indicate the source of the leak.
1
O-rings
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Condenser and Pipe Fitting Area (continued)
3. Inspect the ENTIRE pipe surfaces by
removing the O-rings making sure they are
free from defects, such as foreign material
adhesion, damage, or corrosion. If there
are ANY defects, clean or replace the part.
Refer to the Sealing Surface Abnormalities
(O-ring Attachment Area) subsection for
judgment criteria.
Figure 19.
1
NOTICE
When removing the O-rings, use soft
tools (such as a toothpick) to avoid
damaging the sealing face or the O-ring.
1
4. Inspect the ENTIRE sealing surface of the
condenser making sure it is free from
defects, such as foreign material adhesion,
damage, or corrosion. If there are ANY
defects, clean or replace the part. Refer to
the Sealing Surface Abnormalities (Part
Joint Area) subsection for
judgment criteria.
Sealing Surfaces
Figure 20.
1
NOTICE
When removing the O-rings, use soft
tools (such as a toothpick) to avoid
damaging the sealing face or the O-ring.
1
Sealing Surfaces
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Compressor and Pipe Fitting Area
NOTICE
 Do NOT reuse the O-rings once they are removed.
 As there may be a malfunction in multiple components, make sure to complete ALL and
replace ALL the parts in which defects are found.
 If no malfunction is found in ANY related parts, a temporary leak may have occurred due to
foreign matter on an O-ring, deformation, etc.
1. Remove the discharge and suction pipes
from the compressor.
Figure 21.
1
NOTICE
 Wipe off the joint area with a clean cloth
before disassembly.
 Slowly remove the pipes straight to
prevent the sealing face from being
damaged and foreign materials from
dropping off.
2. Inspect the ENTIRE O-ring surfaces
making sure they are free from defects,
such as damage (cuts, dents, or crushed
areas), foreign material adhesion or twists.
If there are ANY defects, clean or replace
the part. Refer to the O-ring Abnormalities
subsection for judgement criteria.
2
1
Discharge Side
2
Suction Side
Figure 22.
1
NOTICE
 Inspect the O-ring surfaces in a
well-lit area.
 When it is difficult to inspect the
surface conditions due to oil adhesion,
degrease the surface (such as by
wiping it with a clean white cloth). Make
sure not to lose any foreign material
that was adhering to the surface that
may indicate the source of the leak.
1
O-ring
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect the Compressor and Pipe Fitting Area (continued)
3. Inspect the entire pipe surfaces by
removing the O-rings making sure they are
free from defects, such as foreign material
adhesion, damage, or corrosion. If there
are ANY defects, clean or replace the part.
Refer to the Sealing Surface Abnormalities
(O-ring Attachment Area) subsection for
judgement criteria.
Figure 23.
1
NOTICE
When removing the O-rings, use soft
tools (such as a toothpick) to avoid
damaging the sealing face or the O-ring.
1
4. Inspect the ENTIRE sealing surface of the
compressor making sure it is free from
defects, such as foreign material adhesion,
damage, or corrosion. If there are ANY
defects, clean or replace the part. Refer to
the Sealing Surface Abnormalities (Part
Joint Area) subsection for
judgment criteria.
Sealing Surface
Figure 24.
1
NOTICE
When it is difficult to inspect the surface
conditions due to oil adhesion, degrease
the surface (such as by wiping it with a
clean white cloth). Make sure NOT to lose
any foreign material that was adhering to
the surface that may indicate the source
of the leak.
1
Sealing Surfaces
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect Other Joint Areas
NOTICE
 Do NOT reuse the O-rings once they are removed.
 Make sure to inspect all the related parts and replace all the parts where defects are found.
 If no malfunction is found in ANY related parts, a temporary leak may have occurred due to
foreign matter on an O-ring, deformation, etc.
1. Inspect the ENTIRE O-ring surface of the
pipe or part making sure they are free from
defects, such as damage (cuts, dents, or
crushed areas), foreign material adhesion
or twists. If there are ANY defects, clean or
replace the part. Refer to the O-ring
Abnormalities subsection for
judgement criteria.
Figure 25.
1
NOTICE
 Wipe off the joint area with a clean cloth
before disassembly.
 Slowly remove the pipes straight to
prevent the sealing face from being
damaged and foreign materials from
dropping off.
1
O-ring
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
HVAC O-ring Joint Inspections (continued)
Inspect Other Joint Areas (continued)
2. Inspect the ENTIRE sealing surfaces of the
pipe or part by removing the O-rings
making sure they are free from defects,
such as foreign material adhesion,
damage, or corrosion. If there are ANY
defects, clean or replace the pipe or part.
Refer to the Sealing Surface Abnormalities
(O-ring Attachment Area) subsection for
judgement criteria.
Figure 26.
NOTICE
When removing the O-rings, use soft
tools (such as a toothpick) to avoid
damaging the sealing face or the O-ring.
1
1
Sealing Surfaces
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0043-23
August 21, 2023
Page 22 of 24
Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Judgement Criteria
O-ring Abnormalities
Table 2.
There are NO cuts, dents, crushed areas, foreign materials, or twists.
OK CONDITION
CUT
DENT / CRUSHED
AREA
Metal Fragment
Resin Fragment
FOREIGN MATERIAL
TWIST
© 2023 Lexus, a division of Toyota Motor Sales, USA
Lint
Hair
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Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Judgement Criteria (continued)
Sealing Surface Abnormalities (O-ring Attachment Area)
Table 3.
Processing evidence in circumferential direction is NOT a cause of leakage.
OK CONDITION
Metal Fragment
Resin Fragment
Lint
Hair
FOREIGN MATERIAL
DAMAGE
White and Yellow Materials Adhered
(Corrosion Product)
Damage (Scratches) in Axial
Direction and Discoloration (Black)
CORROSION
© 2023 Lexus, a division of Toyota Motor Sales, USA
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August 21, 2023
Page 24 of 24
Air Conditioning Leak Detection Dye and O-ring Joint Inspection
Judgement Criteria (continued)
Sealing Surface Abnormalities (Part Joint Area)
Table 4.
Processing evidence in circumferential direction is NOT a cause of leakage.
OK CONDITION
Metal Fragment
Resin Fragment
Lint
FOREIGN MATERIAL
DAMAGE
Uneven Discoloration (Black) on Sealing Surface
CORROSION
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