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Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock - With Vehicle Skid Control >> System Tests >> Test N: VSC Sensor Circuit >> With Hand-Held Tester

With Hand-Held Tester

  1. Start the engine and check that the VSC warning light flashes. If the VSC warning light does not flash, inspect the VSC warning light circuit and Ts terminal circuit. See SYSTEM TESTS .
  2. When a new ABS/TRAC control module (or skid control ECU) is installed, start the engine and keep the vehicle in stationary condition on a flat place for 3 seconds or more to initialize.
  3. Check the steering angle sensor from the stationary condition by turning the steering wheel to either left or right to the full lock position. Then turn back to the neutral position. If steering angle sensor is faulty this will return an appropriate DTC.
  4. Check the yaw rate sensor by shifting the shift lever to D and drive the vehicle at approximately 3 mph. Turn the steering wheel either left or right 90° or more, and maintain 180° circular drive. Stop the vehicle, shift to P and check that the VSC buzzer sounds for 3 seconds. If the VSC buzzer sounds, the sensor check is completed normally. If the VSC buzzer does not sound, check the VSC buzzer circuit. See TEST J: VSC BUZZER CIRCUIT . Perform the yaw rate sensor check again.
  5. If the VSC buzzer still does not sound, read the DTC by following the tester screen prompts. Please refer to hand-held tester operator's manual for further details. If any DTCs are retrieved, see DIAGNOSTIC TROUBLE CODE DEFINITIONS .
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