Test Mode Procedure

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE

1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

(a) Release the parking brake.

NOTICE:
Before releasing the parking brake, move the shift lever to P for safety (for automatic transmission) or set the chocks to hold the vehicle for safety (for manual transmission).

HINT
When the parking brake is applied or the brake fluid level is low, the brake warning light comes on.

(b) When the engine switch is turned on (IG), check that the ABS warning, brake warning, VSC OFF indicator and slip indicator lights all come on and the TR(A)C OFF message will be displayed on the multi-information display for approximately 3 seconds.

HINT
* If the skid control ECU stores any DTCs, the ABS warning and slip indicator lights will come on.
* If any of the indicators remain on or do not come on, proceed to troubleshooting for the light circuits listed below.

2. SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using the Techstream)

NOTICE:
After replacement of the brake actuator assembly and/or yaw rate and acceleration sensor, perform zero point calibration of the yaw rate and acceleration sensor.

HINT
* If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs recorded during the sensor check will be cleared.
* During Test Mode (signal check), the skid control ECU records all DTCs detected in the sensor check. By performing Test Mode (signal check), the codes are cleared if a normal condition is confirmed. The remaining codes are the codes where a malfunction was found.
(a) Procedure to enter Test Mode

(1) Turn the engine switch off.

(2) Check that the steering wheel is centered.

(3) Check that the shift lever is in P (for automatic transmission) or the parking brake is applied (for manual transmission).

(4) Connect the Techstream to the DLC3.

(5) Turn the engine switch on (IG).

(6) Turn the Techstream on.

(7) Switch the skid control ECU to Test Mode using the Techstream. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.

(8) Check that the ABS warning and slip indicator lights come on for several seconds and then blink in Test Mode.

HINT
If the ABS warning and slip indicator lights do not blink , inspect the TS and CG terminal circuit and ABS warning and slip indicator light circuits.

(9) Check the ABS sensors.

HINT
Check that the ABS warning light is blinking in the Test Mode blinking pattern before performing the ABS sensor check.

(b) Lost Booster Pressure Judgement Check and Master Cylinder Pressure Sensor Zero Point Calibration

NOTICE:
Perform a check in the lost booster pressure state (vacuum in the booster is depressurized).

(1) Turn the engine switch on (IG).

(2) Check that the brake warning light comes on when depressing the brake pedal with a force greater than 59 N (6 kgf, 13.2 lbf) for 1 second or more. (The lost booster pressure state is judged as normal.)

(3) Start the engine while depressing the brake pedal with a force greater than 59 N (6 kgf, 13.2 lbf) for 1 second or more.

(4) Check that the brake warning light goes off when quickly releasing the brake pedal. (The lost booster pressure state is judged as normal.)

(5) Leave the vehicle for 1 second or more. (Master cylinder pressure sensor zero point calibration)

NOTICE:
* If depressing the brake pedal slowly or repeatedly, the master cylinder pressure sensor zero point calibration is not performed normally.
* If the lost booster pressure judgement check results are not normal, then the master cylinder pressure sensor check can not be performed.
* If rechecking after the engine has started, end Test Mode, enter Test Mode again, and release vacuum in the booster by pumping the brake pedal prior to rechecking.
(c) Acceleration Sensor Check

(1) Keep the vehicle stationary on a level surface for 1 second or more.

HINT
The acceleration sensor check can be performed with the master cylinder pressure sensor check below.

(d) Master Cylinder Pressure Sensor Check

(1) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, then quickly and continuously depress the brake pedal with a force greater than 98 N (10 kgf, 22 lbf) for 1 second.

(2) Check that the ABS warning light stays on for 3 seconds.

HINT
* Confirm that the ABS warning light comes on.
* While the ABS warning light is illuminated, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more.
* The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
(e) Speed Sensor Check

(1) Drive the vehicle in reverse for more than 1 second at 3 km/h (2 mph) or more (Reverse signal check).

(2) Check that the ABS warning light goes off.

HINT
Drive the vehicle in reverse and check the speed sensor signal. Note that the signal check can not be completed if the vehicle speed is 45 km/h (28 mph) or more.

(3) Drive the vehicle straight-ahead.

Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds (Forward signal check).

(4) Check that the ABS warning light goes off.

HINT
* The sensor check may not be completed if wheelspin occurs.
* The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
* The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.
(5) Stop the vehicle.

NOTICE:
* Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.
* The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
* After the ABS warning light goes off, if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
* If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.
HINT
When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while the vehicle is stationary.

(6) Check the VSC sensor.

HINT
Check that the slip indicator light is blinking in the Test Mode blinking pattern before performing the VSC sensor check.

(f) Yaw Rate Sensor Check

(1) Move the shift lever from P to D (for automatic transmission) or release the parking brake (for manual transmission) and drive the vehicle at a speed of approximately 5 km/h (3 mph), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.

(2) Stop the vehicle and move the shift lever to P (for automatic transmission) or apply the parking brake (for manual transmission). Check that the skid control buzzer sounds for 3 seconds.

HINT
* If the skid control buzzer sounds, the sensor check has completed normally.
* If the skid control buzzer does not sound, check the skid control buzzer circuit Skid Control Buzzer Circuit, then perform the sensor check again.
* If the skid control buzzer still does not sound, the yaw rate sensor may be malfunctioning. Check for DTCs.
* Make a 180° turn. At the end of the turn, the direction of the vehicle should be within 180° +/-5° of its start position.
* Do not allow the wheels to spin.
* Do not turn the engine switch off while turning.
* Do not move the shift lever to P (for automatic transmission) or do not apply the parking brake (for manual transmission) while turning, but changing the vehicle speed, stopping, or driving in reverse is acceptable.
* Complete the turn within 20 seconds.
(g) End of Sensor Check

(1) If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle is stopped and goes off while the vehicle is driving.

NOTICE:
* When the yaw rate sensor, acceleration sensor, speed sensor, and master cylinder pressure sensor checks are completed, the sensor check is completed.
* If the sensor check is not completed, the ABS warning light will blink even while the vehicle is driving and the ABS will not operate.
(h) Read Sensor Check DTCs

(1) Read the DTC(s) by following the Techstream screen.

NOTICE:
* If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.
* If Test Mode sensor check DTCs and other DTCs are displayed or if only Test Mode sensor check DTCs are displayed, repair the malfunctions, clear the DTCs, and perform Test Mode inspection again.
HINT
See "Sensor Check DTCs".

(2) Turn the engine switch off and disconnect the Techstream.

(i) Sensor Check DTCs

ABS Sensor:

VSC Sensor:

HINT
The codes in this table are output only in Test Mode (signal check).

3. SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When not Using the Techstream)

NOTICE:
After replacement of the skid control ECU and/or yaw rate and acceleration sensor, perform zero point calibration of the yaw rate and acceleration sensor.

HINT
* If the engine switch is turned from on (IG) to on (ACC) or off during Test Mode (signal check), DTCs recorded during the sensor check will be cleared.
* During Test Mode (signal check), the skid control ECU records all DTCs detected in the sensor check. By performing Test Mode (signal check), the codes are cleared if a normal condition is confirmed. The remaining codes are the codes where a malfunction was found.
(a) Procedure to enter Test Mode

(1) Turn the engine switch off.

(2) Check that the steering wheel is centered.

(3) Check that the shift lever is in P (for automatic transmission) or the parking brake is applied (for manual transmission).

(4) Using SST, connect terminals TS and CG of the DLC3.

SST : 09843-18040

(5) Turn the engine switch on (IG).

(6) Check that the ABS warning and slip indicator lights come on for several seconds and then blink in Test Mode.

HINT
If the ABS warning and slip indicator lights do not blink, inspect the TS and CG terminal circuit and ABS warning and slip indicator light circuits.

(7) Check the ABS sensors.

HINT
Check that the ABS warning light is blinking in the Test Mode blinking pattern before performing the ABS sensor check.

(b) Lost Booster Pressure Judgement Check and Master Cylinder Pressure Sensor Zero Point Calibration

NOTICE:
Perform a check in the lost booster pressure state (vacuum in the booster is depressurized).

(1) Turn the engine switch on (IG).

(2) Check that the brake warning light comes on when depressing the brake pedal with a force greater than 59 N (6 kgf, 13.2 lbf) for 1 second or more. (The lost booster pressure state is judged as normal.)

(3) Start the engine while depressing the brake pedal with a force greater than 59 N (6 kgf, 13.2 lbf) for 1 second or more.

(4) Check that the brake warning light goes off when quickly releasing the brake pedal. (The lost booster pressure state is judged as normal.)

(5) Leave the vehicle for 1 second or more. (Master cylinder pressure sensor zero point calibration)

NOTICE:
* If depressing the brake pedal slowly or repeatedly, the master cylinder pressure sensor zero point calibration is not performed normally.
* If the lost booster pressure judgement check results are not normal, then the master cylinder pressure sensor check can not be performed.
* If rechecking after the engine has started, end Test Mode, enter Test Mode again, and release vacuum in the booster by pumping the brake pedal prior to rechecking.
(c) Acceleration Sensor Check

(1) Keep the vehicle stationary on a level surface for 1 second or more.

HINT
The acceleration sensor check can be performed with the master cylinder pressure sensor check below.

(d) Master Cylinder Pressure Sensor Check

(1) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, then quickly and continuously depress the brake pedal with a force greater than 98 N (10 kgf, 22 lbf) for 1 second.

(2) Check that the ABS warning light stays on for 3 seconds.

HINT
* Confirm that the ABS warning light comes on.
* While the ABS warning light is illuminated, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more.
* The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.
(e) Speed Sensor Check

(1) Drive the vehicle in reverse for more than 1 second at 3 km/h (2 mph) or more (Reverse signal check).

(2) Check that the ABS warning light goes off.

HINT
Drive the vehicle in reverse and check the speed sensor signal. Note that the signal check can not be completed if the vehicle speed is 45 km/h (28 mph) or more.

(3) Drive the vehicle straight-ahead.

Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds (Forward signal check).

(4) Check that the ABS warning light goes off.

HINT
* The sensor check may not be completed if wheelspin occurs.
* The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
* The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.
(5) Stop the vehicle.

NOTICE:
* Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.
* The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
* After the ABS warning light goes off, if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
* If the sensor check has not been completed, the ABS warning light will blink while driving and the ABS will not operate.
HINT
When the sensor check has been completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while the vehicle is stationary.

(6) Check the VSC sensor.

HINT
Check that the slip indicator light is blinking in the Test Mode blinking pattern before performing the VSC sensor check.

(f) Yaw Rate Sensor Check

(1) Move the shift lever from P to D (for automatic transmission) or release the parking brake (for manual transmission) and drive the vehicle at a speed of approximately 5 km/h (3 mph), and turn the steering wheel either to the left or right 90° or more until the vehicle makes a 180° turn.

SST : 09843-18040

(2) Count the number of blinks of the ABS warning light and slip indicator lights.

NOTICE:
* If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.
* If Test Mode sensor check DTCs and other DTCs are displayed or if only Test Mode sensor check DTCs are displayed, repair the malfunctions, clear the DTCs, and perform Test Mode inspection again.
HINT
* If more than 1 malfunction is detected at the same time, the lowest numbered code will be displayed first.
* See "Sensor Check DTCs".
(3) After performing the check, disconnect SST from terminals TS and CG, and TC and CG of the DLC3 and turn the engine switch off.

(4) Turn the engine switch on (IG).

HINT
* If the engine switch is not turned on (IG) after SST is removed from the DLC3, the previous Test Mode will continue.
* If the engine switch is turned on (IG) with terminals TS and CG connected, the previous Test Mode will continue.
(i) Sensor Check DTCs

ABS Sensor:

VSC Sensor:

HINT
The codes in this table are output only in Test Mode (signal check).