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Abs-10 - Low Speed Sensor Resistance

  1. Turn ignition off. Disconnect speed sensor harness connector from speed sensor on differential. See Figure . Using an ohmmeter, check resistance between speed sensor terminals. If resistance is 1000-2500 ohms, go to next step. If resistance is less than 1000 ohms, replace speed sensor.
  2. Leave speed sensor harness disconnected. Disconnect negative battery cable. Disconnect ABS control unit harness connector. Check resistance between ABS control unit harness connector terminal "O" and chassis ground. See Figure .
  3. If resistance is greater than 20,000 ohms, go to next step. If resistance is less than 20,000 ohms, repair short to ground in speed sensor HI lead wire between speed sensor and ABS control unit. Check for frayed wires and shorted connectors.
  4. Check resistance between ABS control unit harness connector terminals "L" and "O". See Figure . If resistance is less than 20,000 ohms, repair short between speed sensor circuits. Check for frayed wires and shorted connectors. If resistance is greater than 20,000 ohms, replace ABS control unit.
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