BENDIX M-21-M-22 ANTILOCK MOD ASSY Especificaciones Pagina 69

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7 SPN SID FMI Fault Codes
65
Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)
Figure 7.6
SPN SID FMI
Blink
Code
Description
Warning
Light
System
Reaction
Cause Action
791 3 7 6 + 4
Incorrect Tone
Ring
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Wheel speed signal
drops out
periodically at
speeds higher than
6 mph
• Check for damaged or missing teeth on tone ring.
• Verify tone ring is not corroded or with contamination.
791 3 8 3 + 4 Excessive Slip ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Wheel slip over 16
seconds
continuously has
been detected.
• Adjust wheel sensor to touch tooth wheel.
• Check sensor gap.
• Check for loose wheel bearings or excessive hub runout.
791 3 9 5 + 4
Wires
Mismatched
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
A sensor lead from
an incorrect wheel
end has been
detected.
• Check for mismatch fault of another sensor.
• Verify correct harness location and wiring for sensor.
• Check for corroded or damaged wiring between the ECU and the ABS wheel speed
sensor.
791 3 10 3 + 4
Speed
Drop-Out
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
A temporary loss of
the ABS wheel
speed signal has
been detected.
• Adjust wheel speed sensor until it touches the tone ring.
• Check for loose wheel bearings or excessive hub runout.
• Check sensor wiring and connectors for intermittent contact.
• Check condition of ABS sensor head.
• Check mounting of tone ring and condition of teeth.
• Check condition and retention of ABS sensor spring clip.
• Check ABS sensor cable routing and clipping.
• Check for corroded or damaged wiring between the ECU and the ABS wheel speed
sensor.
• Turn the wheel at half a revolution per second and verify 0.2 AC volt sensor output
voltage.
791 3 11 5 + 4
Abnormal
Speed
(Chatter)
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
Brake drag or
chatter has been
detected. Abnormal
vibrations detected
which affect sensor
signal.
• Check for loose wheel bearings or excessive hub runout.
• Check sensor wiring and connectors for intermittent contact.
• Check mounting of tone ring and condition of teeth.
• Check condition and retention of ABS sensor spring clip as well as the mounting block.
• Check for corroded or damaged wiring between the ECU and the ABS wheel speed
sensor.
• Turn the wheel at half a revolution per second and verify 0.2 AC volt sensor output
voltage.
791 3 12 5 + 4
Frequency
Too High
ABS WL
ABS Wheel
Disabled
ESC/RSC/ATC/
HSA Disabled
A non-plausible
sensor frequency
has been measured.
• Check sensor wiring and connectors for intermittent contact.
• Check if brake at this location is operating correctly, i.e., potentially dragging.
• Check for corroded or damaged wiring between the ECU and the ABS wheel speed
sensor.
• Contact Meritor WABCO OnTrac at 866-OnTrac1 (668-7221) if the fault does not clear.
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