B07-025 Service Bulletin/Repair Instructions

Service Bulletin

January 23, 2021
07-025

Version 8
A/C Leak Detection

Supersedes Version 7, dated September 24 ,2020, to revise the information highlighted in yellow.

AFFECTED VEHICLES

ALL

REVISION SUMMARY

Under LEAK DYE, the Leak Dye Application Chart was revised to include current models and leak dye kit numbers.

LEAK DETECTION TYPES

There are several A/C leak detection tools available.

 Refrigerant Gas Leak Detector

 Ultrasonic Leak Detector

 Leak Dye

REFRIGERANT GAS LEAK DETECTOR

A refrigerant leak detector can sense refrigerant gas leaking from the A/C system.

 It is a good alternative if the vehicle cannot accept leak dye.

 The system must be pressurized to use this type of leak detector.

NOTE:

 Refer to the Acura Tool and Equipment Program for the most current, approved tool.

 Refer to the tool manufacturer's information for correct usage.

ULTRASONIC LEAK DETECTOR

An ultrasonic leak detector listens for leaks in the A/C system.

 It is a good alternative if the vehicle cannot accept leak dye.

 The system must under vacuum to use this type of leak detector.

NOTE:

 Refer to the Acura Tool and Equipment Program for the most current, approved tool.

 Refer to the tool manufacturer's information for correct usage.
CLIENT INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and

training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not assume this

bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an authorized

Acura automobile dealer.

© 2021 American Honda Motor Co., Inc. – All Rights Reserved
Page 1 of 8
LEAK DYE

Dye is injected into the A/C system. System leaks are visible with an ultraviolet light.

There are specific leak dye kits for the R-134a and R-1234yf A/C systems. Make sure you are using the right kit for the

system you are working on. Here are your choices:

 R-134a - OPTIMAX Jr.™ A/C Leak Detection Kit (P/N TRP124893)


R-1234yf - R-1234yf Leak Detection Kit (P/N TRP1234YF)
NOTE:

 Only the dyes mentioned below from Tracer Products (Tracerline® ) are approved for use in Acura vehicles. Other

dyes contain solvents that may contaminate the system's refrigerant oil, leading to component failure.

 Adding excessive amounts of dye can lead to compressor damage and failure.

 Leak dye TRPTP9811P12 has been replaced by TRPTP1108P12. Continue to use TRPTP9811P12 until your

dealership stock runs out.

Leak Dye Application Chart

Not all models allow leak dye. Use this chart to determine if it can be used.

Model
Year
Leak Dye Part Number
3.2 CL
2001–2003
TRPTP3860P12
3.2 TL
2000–2003
TRPTP3860P12
3.5 RL
2000–2004
TRPTP3860P12
2013–2018
TRPTP3860P12
2019–2021
Dye use not allowed
ILX Hybrid
2013–2014
Dye use not allowed
Integra
2000–2001
TRPTP3860P12
2001–2018
TRPTP3860P12
2019–2020
TRPTP9811P12 or TRPTP1108P12
2022
TRPTP9811P12 or TRPTP1108P12
2017–2020
Dye use not allowed
2000–2005
TRPTP3860P12
2017–2021
Dye use not allowed
2007–2018
TRPTP3860P12
2019–2021
TRPTP9811P12 or TRPTP1108P12
RL
2005–2012
TRPTP3860P12
RLX
2014–2020
TRPTP3860P12
RLX Sport Hybrid
2014–2020
Dye use not allowed
RSX
2002–2006
TRPTP3860P12
TL
2004–2014
TRPTP3860P12
2015–2020
TRPTP3860P12
2021
TRPTP9811P12 or TRPTP1108P12
TSX
2004–2014
TRPTP3860P12
ZDX
2010–2013
TRPTP3860P12
ILX
MDX

MDX Sport Hybrid

NSX

RDX
TLX
Page 2 of 8
OPTIMAX JR. A/C LEAK DETECTION KIT

The OPTIMAX Jr.™ R-134a A/C Leak Detection Kit (P/N TRP124893) is a required special tool. The kit is used to add small

amounts of dye to A/C systems to help locate smaller leaks that an electronic leak detector may not find.

When searching for leaks, always begin by using an electronic leak detector. Refer to service bulletin 18-073, Bosch

ROBLD020 Dual Mode Refrigerant Gas Leak Detector, for tips on using this tool, then follow up with the OPTIMAX Jr.

This detection kit complements but does not replace the electronic leak detector.

OPTIMAX Jr. A/C Leak Detection Kit (P/N TRP124893) includes these items:

 TRP8640CS - OPTIMAX Jr.™ cordless, fluorescent leak detection flashlight lamp (includes 3 standard AA batteries)




TRP38600601 - (6) 0.06 oz. (1.7 g) Tracer-Stick® R134a/PAG A/C dye capsules with ID labels

TRP3887 - R-134a Universal Connect Set™

TRP120884 - GLO-AWAY™ dye cleaner



TRP9940 - fluorescence-enhancing glasses

TRP1143 - (1) empty Tracer-Stick dye capsule
Using the Optimax Jr.

NOTE:

 Read and review all safety related information provided in the kit before operation.

 Do not run the A/C system while the dye injector is connected or is being used.

 Do not connect the dye injector to a system that is evacuated.

 The system must contain enough refrigerant to run the compressor and circulate the dye in order to find leaks.

 The dye may damage the paint and finishes on the vehicle, as well as staining hands and clothing.

 Store in a cool place, away from sunlight.

1. Before adding any leak-detection dye, check if there is dye in the system now.







Check for a label in the engine compartment indicating that fluorescent leak-detection dye has been added to the

system.

Dye may have been added even though no label is present. To confirm this, do the following:

- Put on the fluorescence-enhancing glasses, and remove the low-side service port sealing cap.

- Direct the ultraviolet lamp into the valve stem area. If dye has been previously added, the lubricant traces

will have a bright yellow fluorescent glow. You may need to press the port’s valve stem briefly to release some

lubricant and dye from the system.

If there is no dye in the system, go to step 2.

If there is dye in the system, go to step 5. Do not add more dye.
Page 3 of 8
2. Add the dye.

NOTE: Air and moisture must be evacuated from the universal connect set if it is being used for the first time, or if it has

been stored with the control valve open. If the air and moisture have been evacuated, go to step 3; otherwise, do the

following:

2.1. Attach the empty dye capsule (provided in the dye kit) to the control valve fitting.

2.2. Attach the service valve fitting (provided in the kit) to the empty dye capsule.

2.3. Attach the low-side hose of the A/C recovery and charging station, and open the quick coupler’s hand-wheel

valve. Then, open the control valve (black knob) on the universal connect set.

2.4. Following the manufacturer’s instructions for your recovery and charging station, evacuate the universal

connect set for about 3 minutes.

2.5. When evacuation is complete, be sure the set’s control valve is close (finger tight), and disconnect the A/C recovery

and charging station.

2.6. Remove the service valve fitting and the empty dye capsule from the set, and store them for future use.

3. Connect the universal connect set and the Tracer-Stick dye capsule:
3.1. Be sure the quick coupler and control valves on the set are closed.

3.2. Remove the low-side service port sealing cap, and connect the set to the low-side service port using the

quick coupler.

3.3. Hold a new dye capsule so the embossed arrow is pointing up. Remove the black end cap, and carefully

attach the capsule to the control valve fitting.TE

NOTE: The capsule must be held with the embossed arrow pointing up, or the dye will leak out of the capsule.

3.4. Turn the capsule so the embossed arrow is pointing down. Remove the orange end cap, and carefully attach

the service valve fitting provided in the kit (finger tight).

NOTE: The capsule must be held with the embossed arrow pointing down, or the dye will leak out.
Page 4 of 8
4. Connect the A/C service equipment:

4.1. With the universal connect set and dye capsule attached to the vehicle’s low-side service port, connect the

A/C refrigerant recovery and charging station’s low-side hose quick coupler to the service valve fitting.

4.2. Open the blue hand-wheel valves on both quick couplers. Leave the control valve (black knob) on the

universal connect set closed.

NOTE:

 If you have recovered refrigerant to weigh as part of your diagnostics, or if there is a low charge, it is more

 efficient to recharge the system using normal procedures before installing the universal connect set. Dye can

then be added using about 0.05 lb (0.02 kg) of refrigerant.

 You do not need to connect the service equipment’s high-side hose to the vehicle to install the dye. If the highside hose is connected, make sure its coupler valve is closed before proceeding.

 Do not use the A/C recovery and charging station to recover or evacuate the A/C system when a full dye

capsule is attached. The dye will be drawn into the service equipment instead of being added to the vehicle’s

A/C system.

5. Inspect the A/C system for leaks.

5.1. Run the A/C system for 5 to 10 minutes to circulate the dye through the system. Large leaks will be seen

immediately as a fluorescent yellow glow.

5.2. Smaller leaks may require at least 90 minutes of vehicle operation before they become visible.

NOTE:

 Based on the case, you may return the vehicle to the client. Be sure to schedule a return visit 24 to 48 hours

later to ensure the dye has circulated through the system.

 Turn the ECON button OFF before running the A/C system (If equipped).

5.3. Stop the vehicle’s engine, and inspect the system for leaks using the ultraviolet (UV) lamp and fluorescenceenhancing glasses from the kit. Low ambient light conditions (a dark work area) will aid in locating the leak.

NOTE: Not all UV lamps work well with all types of fluorescent dye. Use only the lamp provided in the kit to inspect

for leaks.

5.4. Inspect the entire system. Be sure to check these locations:

 damaged and corroded areas

 fittings

 hose-to-line couplings

 refrigerant controls

 service ports

 brazed or welded areas

 areas near attachment points

5.5. Check for evaporator leaks from the evaporator drain tube area using the ultraviolet lamp and glasses.

5.6. After repairing a leak, remove any fluorescent residue using the GLO-AWAY dye cleaner from the kit and hot water.

Follow the instructions on the bottle.
Page 5 of 8
R-1234YF LEAK DETECTION KIT

The R-1234yf Leak Detection Kit (P/N TRP1234yf) is a required special tool. It is used to add small amounts of dye to A/C

systems to help locate smaller leaks that an electronic leak detector might not find.

When searching for leaks, always begin by using an electronic leak detector. Refer to service bulletin 18-073, Bosch

ROBLD020 Dual Mode Refrigerant Gas Leak Detector, for tips on using this tool, then follow up with the R-1234yf A/C Leak

Detection Kit.

This detection kit complements but does not replace the electronic leak detector.

NOTE: TRPTP1108P12 R-1234yf Low Density POE Mini-EZ dye and TRPTP10 R1234yf hose/coupler with purge fitting

were auto-shipped in July 2020 for use with this kit.

R-1234yf A/C Leak Detection Kit (P/N TRP1234yf) includes these items:

 TRP8655 - OPTI-PRO™ Plus violet light LED leak detection flashlight


TRP98110301 - (3) Mini-EZ™ R1234yf A/C dye cartridges

TRP9845 - EZ-Ject™ injector assembly









TRP128021 - R-1234yf hose/coupler with check valve and purge fitting

TRP127568 - lithium-ion rechargeable battery

TRP128508 - smart A/C charger

TRP121107.- fluorescence-enhancing glasses

TRP120884 - GLO-AWAY™ dye cleaner

TRP121107 - black carrying case
Using the R-1234yf A/C Leak Detection Kit.

NOTE:

 Read and review all safety related information provided in the kit before operation.

 Do not run the A/C system while the EZ-Ject dye injector is connected or is being used.

 Do not connect the EZ-Ject dye injector to a system that is evacuated.

 The system must contain enough refrigerant to run the compressor and circulate the dye in order to find leaks.

 The dye may damage the paint and finishes on the vehicle, as well as staining hands and clothing.

 Store in a cool place, away from sunlight.
Page 6 of 8
1. Before adding any leak-detection dye, check if there is dye in the system now.







Check for a label in the engine compartment indicating that fluorescent leak-detection dye has been added to

the system.

Dye may have been added even though no label is present. To confirm this, do the following:

- Put on the fluorescence-enhancing glasses, and remove the low-side service port sealing cap.

- Direct the ultraviolet lamp into the valve stem area. If dye has been previously added, the lubricant traces

will glow bright yellow. You may need to press the port’s valve stem briefly to release some lubricant and dye

from the system.

If there is no dye in the system, go to step 2.

If there is dye in the system, go to step 13. Do not add more dye.
2. Unscrew the handle on the EZ-Ject injector completely, and screw in the Mini-EZ dye cartridge.

3. Holding the cartridge vertically, remove the cap and screw the cartridge firmly to the coupler.

4. Insert the adapter/purge fitting into the coupler.

5. Turn the handle to push forward the plunger until a small amount of dye exits the assembly.
6. Remove the adapter/purge fitting.

7. Clean any excess dye from the coupler.

8. The R-1234yf coupler is now purged, ready for use, and will be full of dye.

NOTE: If the dye charge is lost, repeat steps 2 through 7.

9. Connect the coupler to the service port on the vehicle.

10. Turn the plunger clockwise to inject the dye.

11. Use one 0.25 oz (7.4 ml) Mini-EZ dye cartridge for one vehicle.

12. Disconnect the coupler from the service port, and wipe both clean.

13. Start the engine, and run the A/C system on maximum for 5 to 10 minutes to circulate the dye.

14. Turn the ignition to OFF.
Page 7 of 8
15. Inspect for possible leaks with the OPTI-PRO Plus flashlight. Leaks will glow bright yellow. The fluorescence will be

brightest under low-light conditions.

15.1. Inspect the entire system. Be sure to check these locations:

 damaged and corroded areas

 fittings

 hose-to-line couplings

 refrigerant controls

 service ports

 brazed or welded areas

 areas near attachment points

15.2. Check for evaporator leaks from the evaporator drain tube area using the ultraviolet lamp and glasses.

16. Residual dye could give a false leak indication. Run the A/C system 5 to10 minutes and inspect with the ultraviolet

light. If there is no visible glow, all leaks have been repaired.

17. To find smaller leaks, run the A/C system for a minimum of 90 minutes and inspect it again.

NOTE:

 Based on the case, you may return the vehicle to the client. Be sure to schedule a return visit 24 to 48 hours later

to ensure the dye has circulated through the system.

 Turn the ECON button OFF before running the A/C system (If equipped).

18. After the leaks are repaired, clean the residual dye (from the leak sites) with a cloth and GLO-AWAY Dye Cleaner.

Check with the lamp to make sure all dye residue is removed.

END
Page 8 of 8

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