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Speed Sensor Test

NOTE: While testing speed sensors, brake system functions as a conventional system.
  1. Ensure battery voltage exists. Turn ignition on. Ensure ABS light illuminates, then goes out after about 3 seconds. If ABS light does not illuminate, check fuse, bulb and wiring harness.
  2. Turn ignition off. DO NOT remove short pin from DLC1. Using a jumper wire, jumper terminals Ts and E1 of DLC1. See Figure. Start engine. Ensure ABS light blinks 4 times per second. If ABNS light does not blink, check warning light and circuit. If light stays on, check deceleration sensor.
  3. Drive vehicle straight ahead above 28 MPH for several seconds. Stop vehicle. Using a second jumper wire, connect terminals Tc and E1 of DLC1. See Figure. If a malfunction is detected, 4 seconds will elapse and ABS light will begin to flash a 2-digit DTC. First number of blinks will equal first digit in a DTC. After a 1.5-second pause, second number of blinks will equal second digit in a DTC.
  4. If 2 or more DTC are stored, there will be a 2.5-second pause between each DTC. After all DTC are flashed, there will be a 4 second pause and all DTC will repeat.
  5. Record DTC. Turn ignition off. Repair as necessary. See SPEED SENSOR DTC. Remove jumper wire from DLC1. Clear DTC. See CLEARING DTC .
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