NHTSA ID Number: 10154840
Manufacturer Communication Number: SB1595A
TSB/Document Date: 2019-03-18
Summary
Compressed-air brake system functional check. These tests are designed to identify the cause(s) of a sluggish performance and/or leaks in the system. The tests give you a general idea of the system condition. The procedures described in this service bulletin are applicable to CX45 vehicles.
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
This product presentation was made with AAWP plugin.
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: SB1595A
Replacement Service Bulletin Number:
MFR Communication Date: 2019-01-30
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, AIR
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
SERVICE BULLETIN
SB1595A
ADDRESSEES
: Owners and operators
ABC Customer Care and Parts Source
VEHICLE MODEL
: CX45
SYSTEM/SUBSYSTEM
: 05.10 Brakes – Compressed-air brakes
BULLETIN TYPE
: Service Information
DATE
: January 30th, 2019
SUBJECT
: Compressed-air brake system functional check
TERMS & CONDITIONS
: This service bulletin does not entitle to any reimbursement.
DESCRIPTION
These tests are designed to identify the cause(s) of a sluggish performance and/or leaks in the
system. The tests give you a general idea of the system condition. The procedures described in this
service bulletin are applicable to CX45 vehicles.
JOB QUALIFICATION:
The task has to be carried out by a technician trained in the operations at hand. If you are not
sure that you’re qualified, contact ABC Customer Care.
EQUIPMENT CONDITION:
•
•
•
•
Park the coach on a level-surfaced service pit.
Apply the parking brake and shut down the engine.
Put a “DO NOT OPERATE” tag on the instrument panel.
Read the entire procedure before starting to work.
WARNING!
Observe safe shop practices at all times.
SAFETY INFORMATION ABOUT SYSTEMS UNDER PRESSURE:
•
•
•
Do not tighten or loosen pipe or hose connections while the pipe or hose is under pressure.
Do not check pressurized lines for leaks with your hands.
Safely depressurize devices containing compressed air under pressure before opening
them.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 1 of 10
LOCATION OF PARKING BRAKE CYLINDERS:
Table 1: Location of parking brake cylinders
VIN range
Axles with parking brake cylinders
Drive axle only
48200 Æ 48203
48205 Æ 48249
48268 Æ 48270
48272 Æ 48281
48283 Æ 48287
48289 Æ 48295
48297 Æ 48306
48309 Æ 48314
48317 Æ 48321
48323 Æ 48336
48341 Æ 48344
48346 Æ 48384
48400 Æ 48423
Drive and tag axle
48204
48250 Æ 48267
48271
48282
48288
48296
48307 Æ 48308
48315 Æ 48316
48322
48337 Æ 48340
48345
48385Æ48399
48424 Æ …
RETRIEVAL OF COMPRESSED-AIR TANK PRESSURES THROUGH DASHBOARD
DISPLAY:
Step
1
Action
Press and hold the left button under the dashboard display for longer than 5 seconds.
The service menu appears on the display.
Figure 1: Left button under dashboard
display
Figure 2: Service menu
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 2 of 10
2
Press the button under the dial symbol. The garage feature menu appears on the
display.
Figure 3: Garage feature menu
3
Press the pressures retrieval button (P). The first screen appears on the display.
Browse through the screens with the buttons under the arrows until the required
compressed-air tank pressure screen appears.
Figure 4: Compressed-air tank
pressure screen (example shows
pressure in front axle brakes
tank)
(1) Front axle brakes tank
(2) Drive-axle service brakes
tank
(3) Trailing-axle (service) brake
tank
(4) ZF Astronic transmission
circuit (if applicable)
BUS-STOP BRAKE OPERATION:
The bus-stop brake is an automatic brake and operates by adding compressed air to the service
part of the brake cylinders on the drive and trailing axles.
The bus-stop brake is applied when you:
•
•
•
open a passenger door;
unlock the wheelchair lift system (if applicable);
switch on the suspension kneeling system.
It is released again if you press the accelerator pedal provided that all entrance doors are
closed, the wheelchair lift system is locked and the vehicle is no longer kneeled.
Perform the following steps to be sure that the bus-stop brake is released:
Step
1
2
3
4
Action
Make sure that all entrance doors are closed.
Make sure that kneeling system is deactivated.
Make sure that the wheelchair lift system is locked.
Press the accelerator pedal.
The bus-stop brake symbol on the dashboard display disappears to indicate that the
bus-stop brake is released.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 3 of 10
PROCEDURE:
Step
1
2
3
4
5
6
7
8
9
Action
Put chocks in front of and behind the front-axle wheels.
Prior to performing any test, check the condition of all air lines. Check the pipes for
kinks or dents, the hoses for signs of wear or overheating.
Test the compressed-air supply system as explained in “STEP 3 IN DETAIL”.
Test the tank supply circuit for leakage as indicated in “STEP 4 IN DETAIL”.
Test the parking brake operation as indicated in “STEP 5 IN DETAIL”.
Test the service brake delivery circuits for leakage as indicated in “STEP 6 IN DETAIL”.
Test the bus-stop brake operation as indicated in “STEP 7 IN DETAIL”.
Test the one way check valves operation as indicated in “STEP 8 IN DETAIL”.
Test the operation of the dual air system as indicated in “STEP 9 IN DETAIL”.
End of procedure
STEP 3 IN DETAIL: To test compressed-air supply system (pressure build-up, low
pressure warning, governor operation)
Step
3.1
Action
Connect an accurate pressure gauge to the test fitting (identified by two red adhesive
tapes) behind the front bumper.
3.2
WARNING!
Use appropriate hearing protection while draining the air tanks.
Completely drain the entire air system by using the drain cocks on the air tanks.
Refer to figure 9 at the end of this service bulletin for air tanks location.
3.3
Figure 5: Compressed-air tank drain cock,
previous model
Figure 5b: Compressed-air tank drain
cock, current model
1.Closed
2. Open
Left: closed
Right: open
Close the air tanks cocks if the compressed-air system is drained.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 4 of 10
3.4
Turn the vehicle ignition on.
Low air warning on dashboard display should appear and low air buzzer should
sound. If not so, check installation.
Figure 6: Low air warning on dashboard
display (example shows a low pressure
condition in circuit 2)
(1)
(2)
(3)
(4)
Front axle brakes tank
Drive-axle service brakes tank
Trailing-axle (service) brakes tank
ZF Astronic transmission circuit
(if applicable)
3.5
Start the engine and run at 1,600 rpm.
3.6
Low air warning should disappear and buzzer should stop when pressure reaches 80 psi.
If not so, check installation.
Start timing as system pressure reaches 85 psi and stop at 100 psi.
3.7
Air build-up time should be 45 seconds or less. If the build-up time is excessive,
check:
• for excessive air system leakage;
• for restrictions in the air compressor inlet or discharge lines (carbon build-up);
• Air compressor condition (excessive wear on piston rings and/or cylinders);
• operation of air compressor inlet and discharge valves.
Idle the engine. Observe reading on the air pressure gauge when governor cuts out
the compressor. The reading should be as shown in table 2.
Table 2: Governor setting
Cut-in pressure (psi)
Cut-out pressure (psi)
115 +0/-5 psi
135 ± 5 psi
3.8
With the engine still running, slowly reduce air pressure in the system by applying
and releasing the brakes. Observe reading on pressure gauge when governor cuts in
the compressor. The reading should be as shown in table 2. If not so, check the
operation of the governor and the unloading mechanism on the compressor.
STEP 4 IN DETAIL: To test tank supply circuit for leakage
Step
4.1
4.2
4.3
4.4
Action
Connect an accurate pressure gauge to the test fitting (identified by two red adhesive
tapes) behind the front bumper.
Fully charge the air system and stop the engine.
Allow pressure to stabilize for at least 1 minute.
Observe the pressure gauge for 2 minutes, and note any pressure drop.
Pressure drop should not be more than 3 psi per minute. If not so, coat all air line
connections and pneumatic components with a water and soap solution. Bubbles will
indicate an air leak, and none should be permissible. Repair or replace defective
parts.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 5 of 10
STEP 5 IN DETAIL: To test parking brake operation
Step
5.1
5.2
5.3
5.4
Action
Connect an accurate pressure gauge to the test fitting in the air line leading to the
spring brake part of the brake cylinder of the left-hand drive wheel.
Only in case of parking brake cylinders on the trailing axle (refer to table 1):
connect also an accurate pressure gauge to the test fitting in the air line leading to
the spring brake part of the brake cylinder of the left-hand trailing wheel.
Fully charge the air system and stop the engine.
Pull the parking brake button to apply the parking brake. The pressure gauge should
indicate no pressure.
Figure 7: Parking brake button
5.5
Push and hold the emergency parking brake release button to release the parking
brake. The pressure gauge(s) should indicate pressure.
Figure 8: Emergency parking
brake release button
5.6
5.7
5.8
Release the emergency parking brake release button.
Push the parking brake button to release the parking brake. The pressure gauge(s)
should indicate pressure.
Reduce air pressure in the system by applying and releasing the foot brake.
Low air warning on dashboard display should appear and low air buzzer should
sound when pressure drops to 80 psi. Drive axle spring brakes should apply when
pressure drops to approximately 60 psi.
STEP 6 IN DETAIL: To test service brake delivery circuits for leakage
Step
6.1
6.2
Action
Connect accurate pressure gauges to:
• the test fitting in the air line leading to the brake cylinder of a front axle wheel;
• the test fitting in the air line leading to the service part of a brake cylinder of a
drive axle wheel;
• the test fitting in the air line leading to (the service part of) a brake cylinder of a
trailing axle wheel;
Fully charge the air system and stop the engine.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 6 of 10
6.3
6.4
Apply the foot brake pedal, allow pressure to stabilize for at least 1 minute.
Hold down the foot brake pedal for 2 minutes while observing the pressure gauges.
Pressure drop should not be more than 4 psi per minute. If not so, coat all brake air
line connections and pneumatic components with a water and soap solution. Bubbles
will indicate an air leak, and none should be permissible. Repair or replace defective
parts.
STEP 7 IN DETAIL: To test bus-stop brake operation
Step
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
Action
Connect accurate pressure gauges to:
• the test fitting in the air line leading to the service part of a brake cylinder of a
drive axle wheel;
• the test fitting in the air line leading to (the service part of) a brake cylinder of a
trailing axle wheel;
Fully charge the air system.
Operate the kneeling system. The pressure gauges should indicate pressure.
Return to normal ride height and press the accelerator pedal. The pressure gauges
should indicate no pressure.
Unlock the wheelchair lift system. The pressure gauges should indicate pressure.
Lock the wheelchair lift system and press the accelerator pedal. The pressure
gauges should indicate no pressure.
Open the front entrance door. The pressure gauges should indicate pressure.
Close the front entrance door and press the accelerator pedal. The pressure gauges
should indicate no pressure.
If applicable, repeat steps 7.7 and 7.8 by operating the rear entrance door
STEP 8 IN DETAIL: To test operation of one way check valves
WARNING!
Use appropriate hearing protection while draining the air tanks.
Step
8.1
8.2
8.3
8.4
Action
Fully charge the air system and stop the engine.
Retrieve the compressed-air tank pressures screen on the dashboard display
through the garage feature menu.
Drain the wet tank.
The compressed-air tank pressures screen on the dashboard display should not
indicate a loss of pressure.
Close the wet tank drain cock.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 7 of 10
STEP 9 IN DETAIL: To test operation of dual air system
WARNING!
Use appropriate hearing protection while draining the air tanks.
Step
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
9.10
9.11
9.12
9.13
9.14
9.15
9.16
9.17
9.18
9.19
9.20
Action
Connect accurate pressure gauges to:
• the test fitting in the air line leading to the brake cylinder of a front axle wheel;
• the test fitting in the air line leading to the service part of a brake cylinder of a
drive axle wheel;
• the test fitting in the air line leading to (the service part of) a brake cylinder of a
trailing axle wheel;
Fully charge the air system and stop the engine.
Make sure the bus-stop brake is released.
Drain the drive axle service brakes tank.
Make a service brake application and check whether the pressure gauges connected
to the front and trailing axle brakes indicate pressure.
Close the drain valve of the drive axle service brakes tank.
Start the engine and fully charge the air system again.
Stop the engine.
Make sure the bus-stop brake is released.
Drain the front axle brakes tank.
Make a service brake application and check whether the pressure gauges connected
to the drive and trailing axle brakes indicate pressure.
Close the drain valve of the front axle brakes tank.
Start the engine and fully charge the air system again.
Stop the engine.
Make sure the bus-stop brake is released.
Drain the trailing axle brakes tank.
Make a service brake application and check whether the pressure gauges connected
to the front and drive axle brakes indicate pressure.
Close the drain valve of the trailing axle brakes tank.
Start the engine and fully charge the air system again.
Stop the engine.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 8 of 10
LOCATION OF COMPRESSED-AIR TANKS
Figure 9: Location of compressed-air tank on CX45
1. Front axle brakes
2. Parking brake emergency release
3. Wet tank
4. Accessories
5. Rear raising
6. Trailing axle brakes
7. ZF Astronic (vehicles with ZF Astronic transmission only)
8. Air-dryer regeneration
9. Drive axle service brakes
10. Kneeling system
HELP DESK:
Consult ABC Customer Care & Parts Source toll-free for guidance on 1-877-427-7278. Listen
for the prompts for warranty and select that option.
Continued on next page.
SB1595A_USA_en_2019-01-30
Page 9 of 10
DISCLAIMER:
The procedures contained herein are not exclusive. Van Hool cannot possibly know, evaluate,
or advise the transportation industry of all conceivable ways in which a procedure may be
undertaken or of the possible consequences of each such procedure. Other procedures may be
as good, or better, depending upon the particular circumstances involved. Each carrier
who
uses the procedures herein must first satisfy itself thoroughly that neither the safety of its
employees or agents, nor the safety or usefulness of any products, will be jeopardized by any
procedure selected.
INFORMATION HANDLING:
Important supplements to and modifications of technical information not yet included
in the manual, are communicated by means of Service Bulletins.
VAN HOOL CUSTOMER PORTAL:
Consult the customer portal regularly for the latest service documentation. Beside the
maintenance manual, you will also find the operating manual and the spare parts catalogue of
your vehicle on the customer portal. The customer portal is accessible through
www.vanhool.be, and only with a code (password) from Van Hool. If you do not have a
password yet, request it by using the link on the Van Hool website.
SB1595A_USA_en_2019-01-30
Page 10 of 10
- 🎉[OTOFIX D1 Lite, Perfect Cost-effective Diagnostic Tool]: OTOFIX D1 Lite, a newest bidirectional scan tool from OTOFIX company, is a great choice for DIYers and repair shops. 👉This obd2 scanner diagnostic tool packs all practical functions: OE level all systems diagnoses, Bi-Directional Control, 38+ reset services fixing 99% of common problems, support DoIP & CANDF protocols and FCA
AutoAuth, high-end hardware configuration. Worldwide vehicles and 🔥2 Years Free Updating🔥 covered. - 🎉[Bi-Directional Scan Tool, Active Test]: OTOFIX D1 Lite bluetooth obd2 scanner can also command ECUs and monitor the operation of the actuators to track down the problems of certain parts, like windows, sunroof, wipers, fuel pumps, etc., saving repair time & trouble. This makes OTOFIX D1 Lite the most cost-effective bidirectional scan tool.
- 🎉[2026 Newest, 38+ Hot Reset Functions]: Equipped with 38+ reset functions in one, the OTOFIX D1 lite automotive scanner diagnostic tool allows you to troubleshoot 99% of common vehicle problems. You can use this car diagnostic scanner holding enough functions to easily repair common vehicle models in your repair shops. Including Oil Reset, Injector Coding, Throttle, DPF Reset, SCR Reset, Gear Learning, Clutch Learning, Suspension, etc. Note* Reset functions vary by model.
- 🎉[OE Level Full Systems Diagnostics]: Unlike the 2-system and 4-system diagnostic tools, the OTOFIX auto scan tool can complete comprehensive system diagnostics within 5 minutes. It accesses and scans all available onboard systems like for Engine /AT /ABS /EPB /BMS /TPMS /SRS /SAS /Audio System /BCM /Air Conditioning / etc., to read & clear codes, view live data, and check ECU information. Note: Active test is not involved.
- 🎉[Powerful Hardware Configuration]: Designed with a fashion appearance & a 7” touchscreen and a weight of 463g, this OTOFIX D1 Lite OBD2 diagnostic scanner scan tool is convenient for everywhere and easy to use & store. Android9.0 OS and 2+64GB memory enhance multi-task smoothness and diagnostic operation, no more wasting too much time. 5800mAh battery allows hours-lasting use. WiFi & VCI1 also bring faster communication for your diagnostics.
- 🏆【2026 TOP OBD2 Scanner Diagnostic Tool】OTOFIX D1 Lite wireless obd2 scanner has upgraded hardware configuration and car coverage. The newly upgraded D1 Lite with 🔥OS Android 9.0🔥1.5Ghz 4 core high efficiency processor🔥2GB RAM+64GB ROM large storage🔥5800mAh large battery, more stable and longer lasting diagnostics🔥 38+ Reset🔥action tests🔥full system diagnostic🔥Supports MV105 endoscope🔥21+ Language Supports🔥100000+ vehicle coverage to meet all your daily maintenance needs.
- 👍【Bi-Directional Control / Active Test】D1 Lite obd2 scanner has bidirectional control(worth $300+), which is the most beloved feature among mechanic. If your headlights or car windows are broken, going to a repair shop will cost a lot of money. You can use D1 Lite to send execution commands to the ECU module and identify the repair status. Such as ABS, car windows, doors, valves, wipers, headlights, etc., effectively shorten diagnostic time and reduce diagnostic costs.
- 🔥【All Systems Diagnostics, In-depth Checking】This advanced OBD2 Scanner D1 Lite can perform OE-level diagnosis of all systems including engine, transmission, airbag, ABS, ESP, TPMS, gateway, steering, radio, and air conditioning for more than 100 brands. This diagnostic scanner supports essential functions, such as reading ECU version info, reading and clearing fault codes, and reading data streams.With just a simple click, it provides you with accurate and in-depth diagnostics.
- 🏆【38+ Reset Hot Functions】For repair workshops, holding an OTOFIX D1 Lite Auto scanner is a strong advantage over others. Its 38+ maintenance functions provide various solutions for all module repairs, including Oil Reset, TPMS Reset, Injector Coding, Suspension, Throttle Matching, etc., which will usher your repair business to a new pinnacle. Continuously updating will never make the functionality & compatibility out-of-date.
- 🏆【150+ Models, 10000+ Car Coverage & 16 Languages】D1 Lite is a comprehensive car diagnostic scan tool, help you to troubleshoot car issues fast for 95% US, European, Asian auto makes. ✅ With frequent updates and optimizations allow D1 Lite to cover more vehicles to meet your needs. ✅ Multilingual menu allows auto mechanics around the world to use it without language barriers. 🚩Note: Kindly send us the S/N of the device to authorize new language updates before changing the menu language.
- 【2026 OTOFIX D1 Lite Gives the Best Value for Money】OTOFIX D1 Lite bidirectional scan tool is more FASTER and SMARTER with 2026 Enhanced Hardwares & New Functions! 👍Alternative Bluetooth +USB connect 👍2G+64GB 👍4x ARM Cortex-A35 (1.5GHz) Processor (5X Faster CPU) 👍Android 9.0 OS 👍5G GHz WiFi 👍CANFD&DOIP 👍 FCA AutoAuth 👍38+ Services 👍3K+ Bi-Directional Control 👍Full Systems Diagnose 👍2 Years Update 👍150+ Vehicle Coverage.
- 👍【Active Tests】 OTOFIX D1 Lite is a bi-directional scan tool that can send commands to, and also receive information from vehicle control modules. This way, you can quickly locate and repair faulty auto parts. For Example: send direct commands to ask the vehicle to turn on/off the radiator fan, lights, sound horn, fuel pump, modulate throttle, open/close windows, operate mirrors and more. *Note that only available tests will be displayed in the menu.
- 👍【38+ Service Functions】 OTOFIX D1 Lite scan tool offers 38+ of the hottest service functions that are commonly used for car repairs. That include Oil reset/SAS/EPB/BMS/Throttle/ABS bleeding, and 2065-new SUS/ADBLUE/NOX/Headlamp resets (and more) to help restore your car status after repairs are done. Compared to other diagnostic scanners for cars, the OTOFIX D1 Lite scanner is much more fully-featured. *Note that specific functions available depend on the make/model/year of your car.
- 👍【All System Diagnostics + Cloud Report Management】 This 2026 car scanner OTOFIX D1 Lite provides troubleshooting and data for all ECUs: read/clear DTCs, view graphic live data/VIN, and locate system faults for safe driving. With Cloud Report Management, you can save detailed reports to cloud servers and easily shared them with others via QR codes/emails/text messages. Others can access these reports from any device (smartphones/tablets/PCs …) anytime, and you can better manage repair work.
- 👍【99% Car Coverage】 This one-station car scanner diagnostic for all cars works on 150+ major car brands across the world. 1) It supports CAN-FD/DoIP protocols: compatible with GMCAVALIER/TRAX/Encore/Envision/GL8(LSY)/CT4/CT5 after 2019; Volvo after 2018; Land Rover/Jaguar after 2017; and BM.W F/G all chassis. 2) For models equipped with security modules (such as Renault & 2018+ FCA SGW), its built-in AutoAuth allows you to easily break diagnostic barriers after registration.
This product presentation was made with AAWP plugin.
Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API