LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 1999 >> Avalon XLS >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System W/Traction Control System >> Diagnosis & Testing >> Speed Sensor Diagnostics

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. See ABS WARNING LIGHT .
  2. Turn ignition off. Using a jumper wire, jumper check connector terminals Ts and E1 of DLC1. See Figure-Figure . Start engine. Ensure ABS light blinks 4 times per second. If it does not, go to ABS WARNING LIGHT .
  3. Drive vehicle straight ahead faster than 28 MPH for several seconds without depressing brake. Stop vehicle. Jumper terminals Tc and E1 of DLC1. See Figure. Observe ABS warning light. 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 DTC. After a 1.5-second pause, second number of blinks will equal second digit in 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 speed sensor DTCs. See DTC DEFINITIONS . Turn ignition off. Repair as necessary. See FRONT SPEED SENSORS , REAR SPEED SENSORS  and SENSOR ROTORS  under COMPONENT TESTS. Clear DTCs. See CLEARING DTCS .
scientia non olet · About LEMON Manuals