Front and Rear Wheel Speed Sensor On-Vehicle Inspection
Precautions: Precautions for ESP® · Precautions for Diagnosing Trouble · Test with Speedometer Tester or Other Equipment · Precautions for Brakes · General safety (00)
NOTICE:
Incorrect voltage or mis-connection will damage the wheel speed sensor.
Check that the power supply voltage and test connections are both correct before connecting battery.
Output Voltage Inspection
1)Disconnect negative (–) cable at battery.
2)Hoist vehicle a little.
3)Disconnect wheel speed sensor connector (1).
4)Set up measuring devices as shown in figure.
| [A]: | Wheel speed sensor connector (View: [a]) |
| 2. | Resistance (100 Ω) |
| 3. | Power supply (12 V) |
5)Measure voltage at both ends of resistance without wheel rotation. If check result is not as specified, check sensor, mating encoder and their installation conditions.
Voltage at resistance (100 Ω) without wheel rotation
600 to 800 mV or 1200 to 1600 mV
6)Measure voltage at both ends of resistance with rotating wheel. Check that high (1) and low (2) voltages are as specified. Check that waveform does not discord.
Voltage at resistance (100 Ω) with wheel rotation
Low voltage: 600 to 800 mV
High voltage: 1200 to 1600 mV