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Home >> Scion >> 2011 >> tC L4-2.5L (2AR-FE) >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Test Mode Procedure

Test Mode Procedure





BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE

1. TEST MODE PROCEDURE (SIGNAL CHECK)

NOTICE:
* After replacing the brake actuator assembly and/or the yaw rate and acceleration sensor, perform calibration.
* VSC is prohibited during test mode.

HINT
* If the ignition switch is turned from ON to ACC or off during test mode (signal check), DTCs stored during the sensor check are cleared.
* During test mode (signal check), the skid control ECU stores 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 indicating where an abnormality was found.

(a) Enter test mode (when using the Techstream).

(1) Turn the ignition switch off.

(2) Check that the steering wheel is centered.

(3) for Manual Transaxle:

Check that the shift lever is in neutral and apply the parking brake.

for Automatic Transaxle:

Check that the shift lever is in P.

(4) Connect the Techstream to the DLC3.

(5) Turn the ignition switch to ON.

(6) Turn the Techstream on.

(7) Enter the following menus: Chassis / ABS/VSC/TRAC / Signal Check.

(8) Check that the ABS warning light and slip indicator light come on for several seconds and then blink in the test mode pattern (0.125 seconds on and 0.125 seconds off).

(b) Enter test mode (when using SST check wire).

(1) Turn the ignition switch off.

(2) Check that the steering wheel is centered.

(3) for Manual Transaxle:

Check that the shift lever is in neutral and apply the parking brake.

for Automatic Transaxle:

Check that the shift lever is in P.

(4) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.





Text in Illustration





SST : 09843-18040

(5) Turn the ignition switch to ON.

(6) Check that the ABS warning light and slip indicator light blink in the test mode pattern (0.125 seconds on and 0.125 seconds off).

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





2. ABS SIGNAL CHECK

(a) 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.

(b) Master Cylinder Pressure Sensor Check

(1) With the vehicle stationary, release the brake pedal for 1 second or more, and then quickly depress and hold the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second.

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

HINT
* Make sure that the ABS warning light comes on.
* While the ABS warning light is on, 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.
* If the master cylinder pressure sensor check is not completed, depressing the brake pedal causes a further decrease in vacuum in the brake booster, making the sensor check difficult to complete.
* If vacuum is insufficient, the master cylinder pressure sensor check may not be completed. In this case, run the engine at idle to obtain sufficient vacuum.
* If the brake pedal is strongly depressed when vacuum is insufficient, the BRAKE warning light may come on in accordance with booster pressure control. In this case, run the engine at idle to obtain sufficient vacuum.

(c) Speed Sensor Check

NOTICE:
* Before performing the speed sensor signal 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 is stored again. Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).
* If the sensor check is not completed, the ABS warning light blinks while driving and the ABS does not operate.

(1) Drive the vehicle straight-ahead.

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

(2) 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 is completed and the brake pedal is depressed.
* The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.

(3) Stop the vehicle.

HINT
When the sensor check is completed, the ABS warning light goes off while driving and blinks in the test mode pattern while the vehicle is stationary.

3. VSC SIGNAL CHECK

(a) VSC OFF Switch Check

(1) Briefly press the VSC OFF switch.

(2) Check that the VSC OFF indicator light comes on.

(3) Briefly press the VSC OFF switch again.

(4) Check that the VSC OFF indicator light off.

4. END OF SIGNAL CHECK

(a) If the signal check is completed, the ABS warning light and slip indicator light blink (0.125 seconds on and 0.125 seconds off) when the vehicle is stopped and turn off while the vehicle is being driven.

NOTICE:
* When the acceleration sensor, speed sensor, and master cylinder pressure sensor checks are completed, the signal check is completed.
* If the signal check is not completed, the ABS warning light blinks while driving and the ABS does not operate.

5. READ DTC OF SIGNAL CHECK FUNCTION

(a) When using the Techstream:

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

NOTICE:
* If only DTCs other than test mode sensor check DTCs are output, repair the malfunctions and clear the DTCs.
* If test mode (signal check) DTCs and other DTCs are output or if only test mode (signal check) DTCs are output, repair the malfunctions, clear the DTCs, and perform the test mode (signal check) inspection again.

HINT
Refer to Signal Check DTCs.

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

(b) When using SST check wire:

(1) Using SST, connect terminals 12 (TS), 13 (TC) and 4 (CG) of the DLC3.





Text in Illustration





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 output, repair the malfunctions and clear the DTCs.
* If test mode (signal check) DTCs and other DTCs are output or if only test mode (signal check) DTCs are output, repair the malfunctions, clear the DTCs, and perform the test mode (signal check) inspection again.

HINT
* If more than 1 malfunction is detected at the same time, the lowest numbered code is output first.
* Refer to the list of test mode DTCs.

(3) Disconnect SST from terminals 12 (TS), 4 (CG) and 13 (TC) of the DLC3 and turn the ignition switch off.

(4) Turn the ignition switch to ON.

HINT
* If the ignition switch is not turned to ON after SST is removed from the DLC3, the previous test mode continues.
* If the ignition switch is turned to ON with terminals TS and CG connected, the previous test mode continues.

6. LIST OF TEST MODE (SIGNAL CHECK) DTC

HINT
The codes in this table are output only in test mode (signal check).

ABS Sensor





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