VSC Sensor Signal Check (Test Mode)

VSC SENSOR SIGNAL CHECK (TEST MODE)

1. In case of not using LEXUS hand-held tester

NOTE: When having replaced the yaw rate sensor, deceleration sensor and/or ECU, perform zero point calibration of the yaw rate sensor and deceleration sensors.

HINT: If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC will be erased.

a. Procedures for test mode:
1. Turn the ignition switch OFF.
2. Check that the shift lever position is at P range. Turn the steering wheel to the straight-ahead position.




3. Using SST, connect terminals Ts and CG of DLC3.
SST 09843 - 18040
4. Start the engine and the VSC warning light blinks.

HINT: If the VSC warning light does not blinks, inspect the VSC warning light circuit or Ts terminal circuit.

Trouble Area
Ts Terminal circuit
VSC warning light circuit

5. keep the vehicle in a stationary on a level place for 1 seconds or more.




b. Check the yaw rate sensor.
1. Shift the shift lever to the D range and drive the vehicle at the vehicle speed of approx. 5 km/h (3 mph). Turn the steering wheel either to left or right for 90 ° or more, and maintain 180 ° circular drive for the vehicle.
2. Stop the vehicle and shift the shift lever to the P range. Check that the skid control buzzer sounds for 3 seconds.
- If the skid control buzzer sounds, the sensor check is in normal completion.
- If the skid control buzzer dose not sound, check the skid control buzzer circuit, then do the sensor check again.

Trouble Area

Skid control buzzer circuit

- If the skid control buzzer still does not sound, there is malfunction in the VSC sensor, so check the DTC.

HINT:
- Drive the vehicle circularly by 180°. At the end of the turn, the direction of the vehicle should be within 180° ± 5° from its start position.
- Do not spin the wheels.




c. Read the DTC.
1. Using SST, connect terminals Tc and CG of DLC3.
SST 09843 - 18040
2. Read the number of VSC warning light on the combination meter.

HINT:
- See the list of DTC.
- If every sensor is normal, the normal code is output (A cycle of 0.25 seconds ON and 0.25 seconds OFF is repeated)
- If 2 of more malfunctions are detected at the same time, the lowest numbered will be displayed 1st.

3. After doing the check, disconnect the SST from terminals Ts and CG, Tc and CG of DLC3 and turn the ignition switch OFF.
SST 09843 - 18040

2. In case of using LEXUS hand-held tester

NOTE: When having replaced the yaw rate sensor, deceleration sensor and/or ECU, perform zero point calibration of the yaw rate sensor and deceleration sensors. Make sure that this operation should be done before starting the following.

HINT: If the ignition switch is turned from ON to ACC or LOCK during test mode. DTC will be erased.

a. Hook up the LEXUS hand-held tester to the DLC3.
b. Do step 1. -(a)- (1), (b) and (c).
c. Read the DTC by following the prompts on the tester screen.

HINT: Please refer to the LEXUS hand-held tester operator's manual for further details.