Mazda 6 2002 Workshop Manual page 590

FRONT/REAR ABS WHEEL-SPEED SENSOR INSPECTION
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Visual Inspection
1. Remove the wheel and tire, and inspect the sensor for looseness and damage. Replace the sensor if
necessary.
Clearance Inspection
1. Inspect the clearance between the wheel-speed
sensor and the sensor rotor.
Clearance
0.3—1.1 mm {0.012—0.043 in}
Resistance Inspection
1. Disconnect the ABS wheel-speed sensor connector.
2. Inspect the resistance at the ABS wheel-speed sensor.
• If not as specified, replace the ABS wheel-speed sensor.
Resistance
1.3—1.7 kilohm
Voltage Inspection
1. On level ground, jack up the vehicle and support it evenly on safety stands.
2. Disconnect the ABS wheel-speed sensor connector.
3. Inspect each sensor by rotating each wheel one revolution per second.
• If not as specified, replace the ABS wheel-speed sensor.
Voltage
0.25—1.2 V (AC)
Voltage Pattern Inspection
1. On level ground, jack up the vehicle and support it evenly on safety stands.
2. Disconnect the ABS wheel-speed sensor connector.
3. Using an oscilloscope, inspect voltage pattern for
distortion and noise by rotating each wheel.
• If there is distortion or noise, inspect the ABS
sensor rotor.
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ABS/TCS
A6E692143720W02
A6E6921W003
P
A6E6921W004
P–33