Anti-Lock Brake System (For Sedan) Test Mode Procedure

Procedure to enter Test Mode.

1. Turn the ignition switch off.
   

2. Check that the steering wheel is in the straight-ahead position.
   

3. 1. for Automatic transaxle:
      Check that the shift lever is in P and apply the parking brake.
      
   2. for Manual transaxle:
      Check that the shift lever is in neutral and apply the parking brake.
      

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 comes on for several seconds and then blinks in Test Mode.
   

   HINT:

   If the ABS warning light does not blink, inspect the 12 (TS) and 4 (CG) terminal circuit and ABS warning light circuit.

   Trouble Area	See procedure
   ABS warning light circuit (Remains on)	YARIS_NCP93 RM000000XIH0BPX.html
   ABS warning light circuit (Does not come on)	YARIS_NCP93 RM000000XIQ0BNX.html
   TS and CG terminal circuit	YARIS_NCP93 RM000000XIU0DMX.html

Check the speed sensor signal.

1. Drive the vehicle straight-ahead.
   Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.
   

   1. The sensor check may not be completed if wheel spin occurs.
      
   2. The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
      
   3. The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.
      

Stop the vehicle.

NOTICE:

1. The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
   
2. After the ABS warning light goes off and 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).
   
3. If the sensor check has not been completed, the ABS warning light blinks during driving and the ABS system does not operate.
   

HINT:

When the sensor check has been completed, the ABS warning light goes off during driving and blinks in the Test Mode pattern while the vehicle is stationary.

If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light is off while the vehicle is being driven.

NOTICE:

If the sensor check is not completed, the ABS warning light blinks even while the vehicle is being driven and the ABS does not operate.

Read the DTC(s) by following the tester screen.

NOTICE:

1. If only the DTCs are displayed, repair the malfunction area and clear the DTCs.
   
2. If the DTCs or Test Mode codes (DTC of signal check function) are displayed, repair the malfunction area, clear the DTCs, and perform Test Mode inspection.
   

HINT:

See the list of DTCs (See procedure "A").

Procedure to enter Test Mode.

1. Turn the ignition switch off.
   

2. Check that the steering wheel is in the straight-ahead position.
   

3. 1. for Automatic transaxle:
      Check that the shift lever is in P and apply the parking brake.
      
   2. for Manual transaxle:
      Check that the shift lever is in neutral and apply the parking brake.
      




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

   SST

   09843-18040
   

   Text in Illustration

   *a	Front view of DLC3

5. Turn the ignition switch to ON.
   

6. Check that the ABS warning light comes on for several seconds and then blinks in Test Mode.
   

   HINT:

   If the ABS warning light does not blink, inspect the 13 (TS) and 4 (CG) terminal circuit and ABS warning light circuit.

   Trouble Area	See procedure
   ABS warning light circuit (Remains on)	YARIS_NCP93 RM000000XIH0BPX.html
   ABS warning light circuit (Does not come on)	YARIS_NCP93 RM000000XIQ0BNX.html
   TS and CG terminal circuit	YARIS_NCP93 RM000000XIU0DMX.html

Check the speed sensor signal.

1. Drive the vehicle straight-ahead.
   Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds and check that the ABS warning light goes off.
   

   1. The sensor check may not be completed if wheel spin occurs.
      
   2. The ABS warning light blinks when the sensor check has been completed and the brake pedal is depressed.
      
   3. The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.
      

Stop the vehicle.

NOTICE:

1. The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.
   
2. After the ABS warning light goes off, if 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).
   
3. If the sensor check has not been completed, the ABS warning light blinks during driving and the ABS system does not operate.
   

HINT:

When the sensor check has been completed, the ABS warning light goes off during driving and blinks in the Test Mode pattern while the vehicle is stationary.

If the sensor check is completed, the ABS warning light blinks (Test Mode) when the vehicle stops and the ABS warning light is off while the vehicle is being driven.

NOTICE:

If the sensor check is not completed, the ABS warning light blinks even while the vehicle is being driven and the ABS does not operate.

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

SST

09843-18040

Count the number of blinks of the ABS warning light.

NOTICE:

1. If only the DTCs are displayed, repair the malfunction area and clear the DTCs.
   
2. If the DTCs or Test Mode codes (DTC of signal check function) are displayed, repair the malfunction area, clear the DTCs, and perform Test Mode inspection.
   

HINT:

1. When the system is operating correctly, each light will blink continuously in a pattern of 0.25 seconds on, then 0.25 seconds off.
   
2. When one DTC is output, each light will output the same code at 4 second intervals. (For example, Code 21 would be output as 2 flashes, a 1.5 second pause, and then 1 flash)
   
3. When 2 or more DTCs are output, each light will output a different code at 2.5 second intervals, and when all codes have been output, there will be a 4 second pause and the sequence will repeat.
   
4. When multiple codes are set, they are output in order starting with the lowest DTC number.
   
5. See the list of DTCs (See procedure "A").
   

After performing the check, disconnect SST from terminals 13 (TC), 12 (TS) and 4 (CG) of the DLC3 and turn the ignition switch off.

Turn the ignition switch to ON.

HINT:

1. If the ignition switch is not turned to ON after SST is removed from the DLC3, the previous Test Mode will continue.
   
2. If the ignition switch is turned to ON with terminals 12 (TS) and 4 (CG) shorted, the previous Test Mode will continue.