ABS Sensor Signal Check (Test Mode)

ABS SENSOR SIGNAL CHECK (TEST MODE)

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

3. Check that the steering wheel is in the straight-ahead position and shift the shift lever to P range.
4. Turn the ignition switch ON.
5. Check that the ABS warning light blinks.

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

Trouble area
Ts terminal circuit
ABS warning light circuit

b. Check the master cylinder pressure sensor.

1. Leaving the vehicle in a stationary condition and the brake pedal in free condition for 1 sec. or more, continue to quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 sec. or more.

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

c. Check the speed sensor signal.

1. Drive the vehicle straight forward with the speed faster than 45 km/h (28 mph) for several seconds and check that the ABS warning light comes off.

HINT: The sensor check may not be completed if the wheels spin or the steering wheels steered during this check.

d. Stop the vehicle.







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

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

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

g. After doing the check, disconnect the SST from terminals Ts and CG, Tc and CG of DLC3 and turn the ignition switch OFF.
SST 09843-19040

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 (3) - (a) - (3) and from (b) to (d).
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.