Sensor Signal Check (Test Mode)

SENSOR SIGNAL CHECK (TEST MODE)

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

a. In case of not using LEXUS hand-held tester:
Check the ABS sensor signal.

1. Turn the ignition switch OFF.




2. Using SST, connect terminals Ts and CG of DLC3.
SST 09843-18040

3. Start the engine.




4. Check that the ABS warning light blinks.

HINT: If the ABS warning light does not blink, inspect the ABS warning light circuit and Ts terminal circuit.

5. Keep the vehicle in the stationary condition on the flat place for 1 sec. or more.
6. Keeping the vehicle in the stationary condition and the break pedal in free condition for 1 sec. or more, continue to depress the break pedal with 147 N (15 kgf, 33 lbf) or more for 1 sec. or more.
7. Keeping the vehicle in the stationary condition, depress the brake pedal with 98 N (10 kgf, 22 lbf) or more quickly.

HINT: The above mentioned condition comes into existence, the ABS warning light comes ON for 3 seconds.

8. Drive vehicle straight forward.
When driving the vehicle at the speed faster than 45 km/h (28 mph) for several seconds, check that the ABS warning light comes off.

HINT: There is a case that the sensor check is not completed if the vehicle has its wheels spun or its steering wheel steered during this check.

9. Stop the vehicle.
10. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040

11. Read the number of blinks of the ABS warning light.






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

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

b. In case of using LEXUS hand-held tester:
Check the ABS sensor signal.




1. Hook up the LEXUS hand-held tester to the DLC3.
2. Do step (3) to (9).
3. 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.

C1271/71 - C1281/81:

DTC of ABS sensor check function

c. In case of not using LEXUS hand-held tester:
Check the VSC sensor signal.

1. Turn the ignition switch OFF.
2. Check that the shift lever position is at P range, turn the steering wheel to the neutral position.




3. Using SST connect terminals Ts and CG of DLC3.
SST 09843-18040

4. Start the engine.




5. Check that the VSC warning light blinks.

HINT: If the VSC warning light does not blink, inspect the VSC warning light circuit and Ts terminal circuit.

6. After a new ECU installed, the first time only:
Start the engine and keep the vehicle in the stationary condition on the flat place for 3 sec. or more, it's installed the zero point calibration of the yaw rate sensor.

7. Check the steering angle sensor.
Turn the steering wheel to either left or right to the full lock position, from the vehicle stationary condition, and turn back the steering wheel to the neutral position.




8. Check the yaw rate sensor.
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 900 or more, and maintain 180 ° circular drive for the vehicle.

Stop the vehicle and shift the shift lever to the P position, check that the VSC buzzer sounds for 3 sec.

HINT:
- If the VSC buzzer sounds, the sensor check is in normal completion.
- If the VSC buzzer does not sound, check the VSC buzzer circuit, then do the sensor check again.
- If the VSC buzzer still won't sound, there is a malfunction in the VSC sensor, so check the DTC.
- Drive the vehicle in a 180 ° circle. At the end of the turn, the direction of the vehicle should be within 180° ± 5° of its start position.
- Do not spin the wheels.

9. Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040

10. Read the number of blinks of the VSC warning light.






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

11. 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

d. In case of using LEXUS hand-held tester:
Check the VSC sensor signal.




1. Hook up the LEXUS hand-held tester to the DLC3.
2. Do steps (2) and (4) to (8).
3. 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.

C0371/71 - C1208/72:

DTC of VSC sensor check function