7 SPN, SID, FMI Fault Codes
95
WABCO Maintenance Manual MM-0112 (Revised 07-18)
Figure 7.29
Figure 7.29
SPN SID FMI
Blink
Code
Description
Warning
Light
System
Reaction
Cause Action
629 254 9 2 + 1
Excessive
Modulator
Activation
Time
ABS WL
ABS Wheel
Disabled
ESC/RSC
Disabled
ATC Disabled if
Fault on Driven
Wheel
An ABS modulator
was activated for an
abnormally long
time.
• Adjust wheel sensor to touch tone ring.
• Check condition of ABS sensor head.
• Check for loose wheel bearings or excessive hub runout.
• Check mounting of ABS tone ring and condition of teeth.
• Check condition and retention of ABS sensor spring clip.
• Check ABS sensor cable routing and clipping.
629 254 12 8 + 3 Internal Error ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
There are multiple
causes. Valves may
have been activated
too long during
diagnostic testing.
Internal ECU
communication is
not correct.
• Reset ECU by cycling the ignition or by using the reset option in TOOLBOX™.
• If fault persists, check ABS ECU powers, grounds and load test.
• After checking powers, grounds and load testing, if fault still persists may indicate the
ECU has failed.
629 254 13 8 + 6
Accelerometer
Out of Range
ABS WL RSC Disabled
The measured
lateral acceleration
by the ECU is out of
range.
• Verify that the ECU is securely mounted, leveled and in correct location as per OEM
specification.
• Reset ECU by cycling the ignition or by using the reset option in TOOLBOX™.
629 254 14 8 + 6
ECU
Mounting,
Accelerometer
Not Plausible
ABS WL RSC Disabled
The measured
lateral
acceleration is not
plausible or the
learned offset is too
high. ECU may be
mounted incorrectly.
• Verify that the ECU is securely mounted, leveled and in correct location as per OEM
specification.
• Reset ECU by cycling the ignition or by using the reset option in TOOLBOX™.
4012658a
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