With Manufacturer's Scan Tool

SENSOR SIGNAL CHECK (TEST MODE) (USING HAND-HELD TESTER)






NOTE: After replacing the yaw rate sensor and/or brake actuator assembly (skid control ECU), perform zero point calibration of the yaw rate sensor.

HINT:
- If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC of sensor check function will be erased.
- During test mode, ECU records all DTC of sensor check function. By preforming sensor signal check, the codes are erased if normality is confirmed. The codes left over are the codes where abnormality was found.

a. Procedures for test mode:
1. Turn the ignition switch off.
2. Check that the shift lever position is at P position.
3. Connect the hand-held tester to the DLC3.
4. Operate the hand-held tester to test mode.
5. Check that the ABS warning light and VSC warning light blink.

HINT: If the ABS warning light and VSC warning light do not blink, inspect the ABS warning light circuit and VSC warning light circuit.

Trouble are
ABS warning light
VSC warning light

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.cm, 22 ft.lbf) or more for 1 sec. or more.

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

c. Check the speed sensor.
1. Drive vehicle straight forward.
When driving the vehicle at the speed of 28 mph (45 km/h) or higher for several seconds, check that the ABS warning light goes off.

HINT: The sensor check may not be completed if the vehicle has its wheel spin or its steering wheel steered during this check.

2. Stop the vehicle.
3. Read the DTCs.




d. Check the yaw rate.
1. Shift the shift lever to the D position and drive the vehicle at the vehicle speed of approx. 3 mph (5 km/h), 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 position, check that the VSC buzzer sounds for 3 sec.

HINT:
- If the skid control buzzer sounds, the sensor check is in normal completion.
- If the skid control buzzer does not sound, check the skid control buzzer circuit, then perform the sensor check again. If the skid control buzzer still won't sound, there is a malfunction in the VSC sensor, so check the DTC.
- Drive the vehicle circularly by 180°. 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.

e. Read the DTC by following the tester screen.

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