VEHICLE STABILITY CONTROL SYSTEM TEST MODE PROCEDURE

TEST MODE PROCEDURE (SIGNAL CHECK) (When Using GTS)

1. Procedure to enter Test Mode.

   
   

   1. Turn the ignition switch off.

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

   3. for CVT model:

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

      for Manual Transaxle model:

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

   4. Connect the GTS to the DLC3.

   5. Turn the ignition switch to ON.

   6. Turn the GTS on.

   7. Switch the skid control ECU to Test Mode using the GTS. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Signal Check.

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

      Tech Tips

      
      

      • The TRC OFF indicator light remains on during Test Mode because traction control is prohibited.

      • 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.

      Trouble Area	See procedure
      TS and CG terminal circuit	Click here
      ABS warning light circuit (Remains on)	Click here
      ABS warning light circuit (Does not come on)	Click here
      SLIP indicator light circuit (Remains on)	Click here
      SLIP indicator light circuit (Does not come on)	Click here

DECELERATION SENSOR CHECK (When Using GTS)

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

   Tech Tips

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

MASTER CYLINDER PRESSURE SENSOR CHECK (When Using GTS)

1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress 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.

   Tech Tips

   
   

   • Ensure that the ABS warning light comes on.

   • While the ABS warning light stays 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 further decreases in vacuum in the brake booster, making the sensor check difficult to complete.

   • If the 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 the 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.

SPEED SENSOR CHECK (When Using GTS)

1. Check the speed sensor signal.

   Note

   Before performing the speed sensor signal check, complete the deceleration sensor and master cylinder pressure sensor checks.

   
   

   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.

      
      

      • 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 after a malfunction has been detected during the speed sensor check.

2. Stop the vehicle.

   Note

   
   

   • The speed sensor check may not be completed if the sensor check is started with the steering wheel turned or one or more wheels spinning.

   • 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).

   • If the sensor check has not been completed, the ABS warning light blinks during driving and the ABS system does not operate.

   Tech Tips

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

VSC OFF SWITCH CHECK

1. Briefly press the VSC OFF switch.

2. Check that the VSC OFF indicator light turns on.

3. Press the VSC OFF switch again to turn the VSC OFF indicator light off.

END OF SENSOR CHECK (When Using GTS)

1. 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.

   Note

   
   

   • When the deceleration 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 blinks even while the vehicle is being driven and the ABS does not operate.

READ DTC OF SIGNAL CHECK FUNCTION (When Using GTS)

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

   Note

   
   

   • If only the DTCs are displayed, repair the malfunction area 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 the Test Mode inspection again.

2. List of DTCs.

   ABS Sensor

   DTC Code	Detection Item	Trouble Area
   C1271	Low output signal from front speed sensor RH	Front speed sensor RH Sensor installation Front speed sensor rotor RH
   C1272	Low output signal from front speed sensor LH	Front speed sensor LH Sensor installation Front speed sensor rotor LH
   C1273	Low output signal from rear speed sensor RH	Rear speed sensor RH Sensor installation Rear speed sensor rotor RH
   C1274	Low output signal from rear speed sensor LH	Rear speed sensor LH Sensor installation Rear speed sensor rotor LH
   C1275	Abnormal change in output signal from front speed sensor RH	Front speed sensor rotor RH
   C1276	Abnormal change in output signal from front speed sensor LH	Front speed sensor rotor LH
   C1277	Abnormal change in output signal from rear speed sensor RH	Rear speed sensor rotor RH
   C1278	Abnormal change in output signal from rear speed sensor LH	Rear speed sensor rotor LH
   C1279	Acceleration sensor output voltage malfunction	Yaw rate and deceleration sensor Sensor installation
   C1281	Master cylinder pressure sensor output malfunction	Stop light switch assembly Master cylinder pressure sensor

   Tech Tips

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

3. Turn the ignition switch off and disconnect the GTS.

TEST MODE PROCEDURE (SIGNAL CHECK) (When Using SST Check Wire)

1. Procedure to enter Test Mode.

   
   

   1. Turn the ignition switch off.

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

   3. for CVT model:

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

      for Manual Transaxle model:

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

   4. 

      Text in Illustration

      *1

      DLC3

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

      SST

      09843-18040

   5. Turn the ignition switch to ON.

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

      Tech Tips

      
      

      • The TRC OFF indicator light remains on during Test Mode because traction control is prohibited.

      • 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.

      Trouble Area	See procedure
      TS and CG terminal circuit	Click here
      ABS warning light circuit (Remains on)	Click here
      ABS warning light circuit (Does not come on)	Click here
      SLIP indicator light circuit (Remains on)	Click here
      SLIP indicator light circuit (Does not come on)	Click here

DECELERATION SENSOR CHECK (When Using SST Check Wire)

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

   Tech Tips

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

MASTER CYLINDER PRESSURE SENSOR CHECK (When Using SST Check Wire)

1. Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly and continuously depress 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.

   Tech Tips

   
   

   • Ensure that the ABS warning light comes on.

   • While the ABS warning light stays 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 further decreases in vacuum in the brake booster, making the sensor check difficult to complete.

   • If the 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 the 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.

SPEED SENSOR CHECK (When Using SST Check Wire)

1. Check the speed sensor signal.

   Note

   Before performing the speed sensor signal check, complete the deceleration sensor and master cylinder pressure sensor signal checks.

   
   

   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.

      
      

      • 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 after a malfunction has been detected during the speed sensor check.

2. Stop the vehicle.

   Note

   
   

   • The speed sensor check may not be completed if the sensor check is started with the steering wheel turned or one or more wheels spinning.

   • 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).

   • If the sensor check has not been completed, the ABS warning light blinks during driving and the ABS system does not operate.

   Tech Tips

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

VSC OFF SWITCH CHECK

1. Briefly press the VSC OFF switch.

2. Check that the VSC OFF indicator light turns on.

3. Press the VSC OFF switch again to turn the VSC OFF indicator light off.

END OF SENSOR CHECK (When Using SST Check Wire)

1. 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.

   Note

   
   

   • When the deceleration 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 driven and the ABS will not operate.

READ DTC OF SIGNAL CHECK FUNCTION (When Using SST Check Wire)

1. 

   Text in Illustration

   *1

   DLC3

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

   SST

   09843-18040

2. Count the number of blinks of the ABS warning and SLIP indicator lights.

   Tech Tips

   
   

   • When the system is operating correctly, each light will blink continuously in a pattern of 0.25 seconds on, then 0.25 seconds off.

   • 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)

   • 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.

   • When multiple codes are set, they are output in order starting with the lowest DTC number.

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

   Note

   
   

   • 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 the Test Mode inspection again.

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

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

4. Turn the ignition switch to ON.

   Tech Tips

   
   

   • If the ignition switch is not turned to ON after SST is removed from the DLC3, the previous Test Mode will continue.

   • If the ignition switch is turned to ON with terminals 12 (TS) and 4 (CG) shorted, the previous Test Mode will continue.

DTC OF TEST MODE (SIGNAL CHECK) FUNCTION (Procedure "A")