Rear Speed Sensors
- Disconnect speed sensor harness connector. Measure resistance between speed sensor terminals. Resistance should be 700-1100 ohms. If resistance is not as specified, replace speed sensor.
- Check continuity between each sensor terminal and sensor body. Continuity should not exist. If continuity is not as specified, replace speed sensor.
- Inspect sensor rotor teeth for scratches, cracks, warping or missing teeth. Connect oscilloscope to speed sensor connector. Drive vehicle at 12.4 MPH and observe speed sensor output wave. See Fig 1. Verify "C" is at least 0.5 volt. Verify "B" is at least 50 percent of "A". If pattern is not as specified, replace sensor rotor.
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