BR–63 BRAKE SYSTEM – ANTI–LOCK BRAKE SYSTEM (ABS) ECU DATA MONITOR USING TOYOTA HAND–HELD TESTER 1. Hook up the TOYOTA hand–held tester to the DLC2. 2. Monitor the ECU data by following the prompts on the tester screen. HINT: TOYOTA hand–held tester has a "Snapshot" function which records the monitored data. Please refer to the TOYOTA hand–held tester operator's manual for further details. F15997 Diagnostic Trouble Code of Speed Sensor Check Function Code No. | Diagnosis | Trouble Area 71 | Low output voltage of right front speed sensor | Right front speed sensor Sensor installation 72 | Low output voltage of left front speed sensor | Left front speed sensor Sensor installation 73 | Low output voltage of right rear speed sensor | Right rear speed sensor Sensor installation 74 | Low output voltage of left rear speed sensor | Left rear speed sensor Sensor installation 75 | Abnormal change in output voltage of right front speed sensor | Right front speed sensor rotor 76 | Abnormal change in output voltage of left front speed sensor | Left front speed sensor rotor 77 | Abnormal change in output voltage of right rear speed sensor | Right rear speed sensor rotor 78 | Abnormal change in output voltage of left rear speed sensor | Left rear speed sensor rotor