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Speed Sensor Diagnostics

NOTE: While diagnosing 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. Engage parking brake. Start engine. Ensure ABS light blinks 4 times per second.
  3. Drive vehicle straight ahead above 28 MPH for several seconds. Stop vehicle. Jumper 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 DTCs are stored, there will be a 2.5-second pause between each DTC. After all DTCs are flashed, there will be a 4 second pause and all DTCs will repeat.
  5. Record DTCs. Turn ignition off. Repair as necessary. See SPEED SENSOR DIAGNOSTIC CODES . Remove jumper wire from DLC1. Clear DTCs. See CLEARING DTCS .
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