7 SPN, SID, FMI Fault Codes
93
WABCO Maintenance Manual MM-0112 (Revised 07-18)
Figure 7.27
Figure 7.27
SPN SID FMI
Blink
Code
Description
Warning
Light
System
Reaction
Cause Action
639 231 14 7 + 1
SAE J1939
Data Link
ESC1 Timeout
ATC WL ESC Disabled
The electronic
steering control
message (ESC1) is
expected but is not
being received in
expected time or not
at all.
• Verify J1939 wiring between external ECU which is sending request and J1939
backbone.
• This message is most likely to come from a steering tag axle controller.
Internal
627 251 3 8 + 2 Overvoltage ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
A supply voltage
which is too high
has been measured
by the ECU for more
than 5 seconds.
• Measure the battery or ignition voltage under load. Check the vehicle battery and
associate components (alternator).
• Check the battery and ensure it is correct for the ECU, i.e., ensure a 24V battery is not
being used with a 12V ECU.
• Check for corroded or damaged wiring between the ECU and voltage supply as well as
ground path.
631 2
ABS System
Configuration
EEPROM
Wheel
Parameter
Incorrect
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
E8 Version only.
The ECU
memorized
system is not in
accordance with the
harness. There are
loads detected at
outputs which
should be open
circuits. Wheel
parameters (number
of tone ring teeth or
tire size) are out of
tolerance.
• Check number of sensors and modulators and correct wiring compared to ECU type.
• Call WABCO North America Customer Care at 855-228-3203 with part
number to ensure ECU is correct for the application.
630 253 1 7 + 5
ATC
Configuration
Issue
ABS WL ATC Disabled
ABS ECU can see
ATC valve but not
the data link.
• Verify data link circuit voltage and resistance.
• Try engine derate test. If test fails, indicates issue with data link circuit.
630 253 2 8 + 2
Incorrect ABS
System
Configuration.
EEPROM or
Wheel
Parameter
Incorrect
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
The ECU
memorized
system is not in
accordance with the
harness. There are
loads detected at
outputs which
should be open
circuits. Wheel
parameters (number
of tone ring teeth or
tire size) are out of
tolerance.
• Check number of sensors, modulators, 3/2 valves and other components match ECU
configurations.(Parameters and installed components are not matching).
• Verify the installed wheel size matches ECU wheel parameter.
• On E452 ECUs with tire data available on request: check Engine ECU, availability of
engine data information and communication between Engine ECU and the ABS ECU.
4012656a
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