NHTSA ID Number: 10252485
Manufacturer Communication Number: SD-24-2936
TSB/Document Date: 2024-04-03
Summary
Bendix
Stand alone Electronic Air Control system service data. This document contains troubleshooting, diagnostic, and maintenance information for the electronic air control system.
2033
9
F10709
Description
AIR1 message
from vehicle
manufacturerspecified
controller not
being received
by SA-EAC
Service Shop
Information
(Vehicle Level Effect)
Service Shop Information
(Recommended Action)
The SA-EAC is
1. Check continuity of CAN
not capable of
wiring between SA-EAC and
reaching the vehicle
vehicle manufacturer-specified
manufacturer-specified
controller.
controller.
2. Confirm 60 Ohms resistance
The SA-EAC is not
on the vehicle CAN line at
receiving messages
the SA-EAC controller by
from the vehicle
disconnecting the connector
manufacturer-specified
and measuring across Pin 4
controller.
and Pin 8 on the harness side
of the connector (See Figure 2).
Compressor is always
on; air dryer safety
valve may open*.
3. Confirm vehicle manufacturerspecified controller messages
are reaching the SA-EAC CAN
bus.
4. Check that the vehicle
manufacturer-specified
controller is configured to
properly broadcast SA-EAC
messages.
1351
5
470505
Bendix® AD-HFi® Compressor is always
solenoid current on; air dryer safety
below normal or valve may open*.
open circuit
1. Perform continuity check from
end to end for each solenoid
pin in the harness
(See Figure 2).
2. Perform continuity check from
Pin 1 to Pin 5 at the SA-EAC
ECU harness with the solenoid
disconnected. There should be
no continuity from pin to pin.
3. With solenoid connected,
resistance across Pin 1 and
Pin 5 should be 40 ohms.
Table 1 - SA-EAC Troubleshooting
* If the safety valve is open, it is recommended that the safety valve be replaced. Refer to SD-08-12046, Bendix® AD-HF® and AD-HFi® Service
Data Sheet, on B2Bendix.com.
** If possible, confirm with a known good Electronic Control Unit (ECU) prior to replacement.
*** Refer to SD-08-12046, Bendix® AD-HF® and AD-HFi® Service Data Sheet, on B2Bendix.com for cartridge replacement.
+ CLP is an extra function meant to help support applications that may experience higher than normal cartridge wear. It may be used as an
indicator that more frequent cartridge changes would improve air system performance. The cartridge change interval should not exceed the
time/mileage recommendations of BW8068, Recommended Service Intervals for Bendix® Air Dryers, on B2Bendix.com.
7
SPN
FMI
DTC/
Lookup
Code
1351
6
470506
Description
Service Shop
Information
(Vehicle Level Effect)
Bendix® AD-HFi® Compressor is always
solenoid short
on; air dryer safety
circuit
valve may open*.
Service Shop Information
(Recommended Action)
1. Perform continuity check from
end to end for each solenoid
pin in the harness
(See Figure 2).
2. Perform continuity check from
Pin 1 to Pin 5 at the SA-EAC
ECU harness with the solenoid
disconnected. There should be
no continuity from pin to pin.
3. With solenoid connected,
resistance across Pin 1 and Pin
5 should be 40 ohms.
158
3
9E0003
AD-HFi solenoid
voltage above
normal
Power source to
SA-EAC is not
supplying vehicle
OE-specified ignition
voltage.
Compressor is always
on; air dryer safety
valve may open*.
1. Check that the power source
can supply the vehicle OEspecified ignition voltage to the
SA-EAC.
2. Check whether the fuse for
the SA-EAC power is blown
(refer to vehicle OE electrical
diagrams).
3. Inspect the wiring connecting
the power source to the
SA-EAC.
4. Perform continuity check from
end to end for power Pin 2 and
ground Pin 6 in the harness
(See Figure 2).
158
4
9E0004
AD-HFi solenoid
voltage below
normal
Power source to
SA-EAC is not
supplying vehicle
OE-specified ignition
voltage.
Compressor is always
on; air dryer safety
valve may open*.
1. Check that the power source
can supply the vehicle OEspecified ignition voltage to the
SA-EAC.
2. Check whether the fuse for
the SA-EAC power is blown
(refer to vehicle OE electrical
diagrams).
3. Inspect the wiring connecting
the power source to the
SA-EAC.
4. Perform continuity check from
end to end for power Pin 2 and
ground Pin 6 in the harness
(See Figure 2).
Table 1 - SA-EAC Troubleshooting
* If the safety valve is open, it is recommended that the safety valve be replaced. Refer to SD-08-12046, Bendix® AD-HF® and AD-HFi® Service
Data Sheet, on B2Bendix.com.
** If possible, confirm with a known good Electronic Control Unit (ECU) prior to replacement.
*** Refer to SD-08-12046, Bendix® AD-HF® and AD-HFi® Service Data Sheet, on B2Bendix.com for cartridge replacement.
+ CLP is an extra function meant to help support applications that may experience higher than normal cartridge wear. It may be used as an
indicator that more frequent cartridge changes would improve air system performance. The cartridge change interval should not exceed the
time/mileage recommendations of BW8068, Recommended Service Intervals for Bendix® Air Dryers, on B2Bendix.com.
8
SPN
FMI
DTC/
Lookup
Code
524034
4
02FFE4
Description
Bendix® AD-HFi®
solenoid voltage
below normal
during engine
idle
Service Shop
Information
(Vehicle Level Effect)
Power source to
SA-EAC is not
supplying vehicle
OE specified ignition
voltage for short
period of time.
Compressor is always
on; air dryer safety
valve may open*.
Service Shop Information
(Recommended Action)
1. Check that the power source
can supply the vehicle OEspecified ignition voltage to the
SA-EAC.
2. Check whether the fuse for
the SA-EAC power is blown
(refer to vehicle OE electrical
diagrams).
3. Inspect the wiring connecting
the power source to the
SA-EAC.
4. Perform continuity check from
end to end for power Pin 2 and
ground Pin 6 in the harness
(See Figure 2).
524034
21
02FFF5
AD-HFi solenoid
voltage below
normal during
engine start
Power source to
SA-EAC is not
supplying vehicle
OE specified ignition
voltage for short
period of time.
Compressor is always
on; air dryer safety
valve may open*.
If only during
engine start, vehicle
battery could be
malfunctioning.
522100
12
74F7EC
Controller
operational
defect
SA-EAC does not
communicate on the
CAN network.
1. Check that the power source
can supply the vehicle OEspecified ignition voltage to the
SA-EAC.
2. Check whether the fuse for
the SA-EAC power is blown
(refer to vehicle OE electrical
diagrams).
3. Inspect the wiring connecting
the power source to the
SA-EAC.
4. Perform continuity check from
end to end for power Pin 2 and
ground Pin 6 in the harness
(See Figure 2).
Replace the SA-EAC ECU per
vehicle OE guideline**.
Compressor is always
on; air dryer safety
valve may open*.
2048
12
00080C
Improper SW
flashed on SAEAC
SA-EAC does not
communicate on the
CAN network.
Replace the SA-EAC ECU per
vehicle OE guideline**.
Compressor is always
on; air dryer safety
valve may open*.
Table 1 - SA-EAC Troubleshooting
* If the safety valve is open, it is recommended that the safety valve be replaced. Refer to SD-08-12046, Bendix® AD-HF® and AD-HFi® Service
Data Sheet, on B2Bendix.com.
** If possible, confirm with a known good Electronic Control Unit (ECU) prior to replacement.
*** Refer to SD-08-12046, Bendix® AD-HF® and AD-HFi® Service Data Sheet, on B2Bendix.com for cartridge replacement.
+ CLP is an extra function meant to help support applications that may experience higher than normal cartridge wear. It may be used as an
indicator that more frequent cartridge changes would improve air system performance. The cartridge change interval should not exceed the
time/mileage recommendations of BW8068, Recommended Service Intervals for Bendix® Air Dryers, on B2Bendix.com.
9
SPN
FMI
DTC/
Lookup
Code
522101
12
75F7EC
Description
Improper SW
flashed on
SA-EAC
Service Shop
Information
(Vehicle Level Effect)
SA-EAC does not
communicate on the
CAN network.
Service Shop Information
(Recommended Action)
Replace the SA-EAC ECU per
vehicle OE guideline**.
Compressor is always
on; air dryer safety
valve may open*.
2048
522100
14
13
00080E
74F7ED
SA-EAC dataset
configuration
performed
incorrectly
SA-EAC does not
communicate on the
CAN network.
Replace the SA-EAC ECU per
vehicle OE guideline**.
Compressor is always
on; air dryer safety
valve may open*.
Improper dataset SA-EAC does not
on the SA-EAC
communicate on the
CAN network.
Replace the SA-EAC ECU per
vehicle OE guideline**.
Compressor is always
on; air dryer safety
valve may open*.
522102
12
76F7EC
SA-EAC HW not
compatible with
SW
SA-EAC does not
communicate on the
CAN network.
Replace the SA-EAC ECU per
vehicle OE guideline**.
Compressor is always
on; air dryer safety
valve may open*.
522100
14
74F7EE
SA-EAC dataset
parameter out of
range
Compressor is always
on; air dryer safety
valve may open*.
Replace the SA-EAC ECU per
vehicle OE guideline**.
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TSB/Document ID: SD-24-2936
Replacement Service Bulletin Number:
MFR Communication Date: 2024-03-06
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, AIR
MFR Component System:
MFR Component Subsystem:
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