Speed Sensor Diagnostics

NOTE: While diagnosing speed sensors, brake system functions as a conventional system.

Ensure battery voltage exists. Turn ignition on. Ensure ABS warning light illuminates, then goes out after about 3 seconds. If ABS warning light does not illuminate, check fuse, bulb and wiring harness. See ABS WARNING LIGHT .
Turn ignition off. Using a jumper wire, jumper terminals Ts and E₁ of DLC1. DLC1 is located in engine compartment on left side of engine. See Figure. Start engine. Ensure ABS warning light blinks 4 times per second. If ABS light does not blink, go to ABS WARNING LIGHT . If ABS warning light blinks, go to next step.
Drive vehicle straight ahead above 28 MPH for several seconds. Stop vehicle. Jumper terminals Tc and E₁ of DLC1. See Figure. If all sensors are okay, a normal DTC is displayed (ABS warning light blinks 2 times a second). If a malfunction is detected, ABS warning 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.
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.
Record DTCs. Turn ignition off. Repair as necessary. See DTC DEFINITIONS . Remove jumper wire from DLC1. Clear DTCs. See CLEARING DTCS .