Component Tests

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 sensor signal.




1. Turn the ignition switch OFF.
2. Using SST, connect terminals Ts and E1 of DLC1.
SST 09843-18020

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 circuit.

5. Keep the vehicle in the stationary condition on the flat place for 1 sec. or more.
6. Leaving the vehicle in the stationary condition and the brake pedal in free condition for 1 sec. or more, continue to depress the brake pedal with 98 N (10 kgf, 22 lbf) of force or more for 1 sec. or more.
7. Leaving the vehicle in the stationary condition, depress the brake pedal with 980 N (100 kgf, 221 lbf) of force or more quickly.

HINT: At this time, the ABS warning light comes on for 3 sec..

8. Drive vehicle straight forward.
When driving the vehicle with 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 rear wheels spun or its steering wheel steered during this check.

9. Stop the vehicle.

10. Using SST, connect terminals Tc and E1 of DLC1.
SST 09843-18020

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

HINT:
- See the list of DTC on step (C).
- 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 of DLC1 and turn the ignition switch OFF.

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

c. Check the DTC of the sensor function.

DECELERATION SENSOR OPERATION DIAGNOSIS SYSTEM

CAUTION: While checking the deceleration sensor operating diagnosis system, ABS does not work and brake system works as a conventional brake system.

DECELERATION SENSOR CHECK




a. Connect 3 dry batteries of 1.5 V in series.
b. Connect VGS terminal to the batteries' positive (+) terminal, and GGND terminal to the batteries' negative (-) terminal, apply about 4.5 V between VGS and GGND terminals.

NOTE: Do not apply voltage of 6 V or more to terminals VGS and GGND.




c. Check the output voltage of GL1 and GL2 terminals.

HINT:
- If the sensor is tilted too much it may show the wrong value.
- If dropped, the sensor should be replaced with a new one
- The sensor removed from the vehicle should not placed upside down.