ANTI-LOCK BRAKE SYSTEM TEST MODE PROCEDURE

WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

1. When the ignition switch is turned to ON, check that the ABS warning and brake warning lights come on for approximately 3 seconds.

   Tech Tips

   
   

   • If the skid control ECU (brake actuator assembly) stores any DTCs, the ABS warning light will come on.

   • If any of the indicators remain on or do not come on, proceed to troubleshooting for the light circuits listed below.

   Trouble Area	See Procedure
   ABS warning light circuit (Remains on)	Click here
   ABS warning light circuit (Does not come on)	Click here
   Brake warning light circuit (Remains on)	Click here
   Brake warning light circuit (Does not come on)	Click here

SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using GTS)

1. Procedure to enter Test Mode.

   
   

   1. Turn the ignition switch to ON.

   2. for Manual Transmission:

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

      for Automatic Transmission:

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

   3. Put the steering wheel in the neutral position.

   4. Turn the ignition switch off and connect the GTS to the DLC3.

   5. Turn the ignition switch to ON and turn the GTS on.

   6. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Signal Check.

      
      Chassis > ABS/VSC/TRC > Utility

      Tester Display
      Signal Check

   7. Check that the ABS warning light comes on for several seconds and then blink in the Test Mode blinking pattern (0.125 seconds on and 0.125 seconds off).

      Tech Tips

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

      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

DECELERATION SENSOR CHECK (When Using GTS)

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

SPEED SENSOR CHECK (When Using GTS)

1. Check the speed sensor signal.

   
   

   1. Start the engine.

   2. 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.

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

   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 of Front Speed Sensor RH	Front speed sensor RH Front skid control rotor RH (Front axle hub inner bearing RH) Sensor installation
   C1272	Low Output Signal of Front Speed Sensor LH	Front speed sensor LH Front skid control rotor LH (Front axle hub inner bearing LH) Sensor installation
   C1273	Low Output Signal of Rear Speed Sensor RH	Rear speed sensor RH Rear skid control rotor RH (Rear axle shaft bearing RH) Sensor installation
   C1274	Low Output Signal of Rear Speed Sensor LH	Rear speed sensor LH Rear skid control rotor LH (Rear axle shaft bearing LH) Sensor installation
   C1275	Abnormal Change in Output Signal of Front Speed Sensor RH	Front speed sensor RH Front skid control rotor RH (Front axle hub inner bearing RH)
   C1276	Abnormal Change in Output Signal of Front Speed Sensor LH	Front speed sensor LH Front skid control rotor LH (Front axle hub inner bearing LH)
   C1277	Abnormal Change in Output Signal of Rear Speed Sensor RH	Rear speed sensor RH Rear skid control rotor RH (Rear axle shaft bearing RH)
   C1278	Abnormal Change in Output Signal of Rear Speed Sensor LH	Rear speed sensor LH Rear skid control rotor LH (Rear axle shaft bearing LH)
   C1279	Abnormal Output Voltage in Deceleration Sensor	Deceleration sensor installation Deceleration 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.

SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using SST Check Wire)

1. Procedure to enter Test Mode.

   
   

   1. Turn the ignition switch to ON.

   2. for Manual Transmission:

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

      for Automatic Transmission:

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

   3. Put the steering wheel in the neutral position.

   4. Turn the ignition switch off.

   5. 

      *a	Front view of DLC3

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

      SST

      09843-18040

   6. Turn the ignition switch to ON.

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

      Tech Tips

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

      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

DECELERATION SENSOR CHECK (When Using SST Check Wire)

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

SPEED SENSOR CHECK (When Using SST Check Wire)

1. Check the speed sensor signal.

   
   

   1. Start the engine.

   2. 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 on during driving and blinks in the Test Mode pattern while the vehicle is stationary.

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

   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. 

   *a	Front view of 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 light.

   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.

   Tech Tips

   
   

   • When the system is operating correctly, each light will blink continuously in a pattern of 0.25 seconds on, and 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 stored, they are output in order starting with the lowest DTC number.

3. After performing the check, disconnect SST from terminals TS and CG, and TC and 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 TS and CG connected, the previous Test Mode will continue.

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