58
Appendix I
SPN
Component
FMI Fault Description
Repair
791
Wheel speed
sensor/tone
ring rear axle
left
5
Sensor defective
Open connection
Sensor impedance
out of normal
operating range
• Check the sensor wiring harness and connection for
damage/interruptions.
• Replace sensor if necessary.
7
Tone ring damaged
or corroded
• Check for damaged or missing teeth on tone ring.
• Verify the tone ring is not corroded or contaminated.
8
Air gap too large
Tone ring damaged
or corroded
• Check for the correct sensor setting (air gap 0.2 to 1.7 mm).
• Check the bearing clearance and tone ring run out.
Eliminate the cause of the increased air gap and correct the
sensor setting.
• Check the tone ring for damage (missing teeth and
corrosion); replace if necessary.
•
Check the sensor for correct installation and bushing/clip for
damage.
9
Air gap too large
Tone ring damaged
or corroded
Noise on sensor
output signal
• Check for the correct sensor setting (air gap 0.2 to 1.7 mm).
• Check bearing clearance and tone ring run out. Eliminate
cause for increased air gap and correct sensor setting.
• Check the tone ring for damage (missing teeth and
corrosion); replace if necessary.
•
Check the sensor for correct installation and bushing/clip for
damage.
10
Noise on sensor
output signal
• Check for the correct sensor setting (air gap 0.2 to 1.7 mm).
• Check the bearing clearance and tone ring run out.
Eliminate the cause of the increased air gap and correct the
sensor setting.
• Check the tone ring for damage (missing teeth and
corrosion); replace if necessary.
•
Check the sensor for correct installation and bushing/clip for
damage.
11
Sensor signal noisy,
brake chatter
• Check for the correct sensor setting (air gap 0.2 to 1.7 mm).
• Check the bearing clearance and tone ring run out.
Eliminate the cause of the increased air gap and correct the
sensor setting.
• Check the tone ring for damage (missing teeth and
corrosion); replace if necessary.
•
Check the sensor for correct installation and bushing/clip for
damage.
Содержание SMARTTRAC MM1543
Страница 1: ...SMARTTRAC HYDRAULIC ANTI LOCK BRAKING SYSTEMS MAINTENANCE MANUAL MM1543...
Страница 2: ......
Страница 28: ...28 Troubleshooting and Testing 4015710a 4015711a...