ANTI-LOCK BRAKE SYSTEM TEST MODE PROCEDURE

TEST MODE PROCEDURE (SIGNAL CHECK)

1. Enter test mode (when using intelligent tester).

   
   

   1. Turn the ignition switch off.

   2. Check that the steering wheel is centered.

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

   4. Connect the intelligent tester to the DLC3.

   5. Turn the ignition switch to ON.

   6. Turn the intelligent tester on.

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

   8. Check that the ABS warning light comes on for several seconds and then blinks in the test mode pattern (0.125 seconds on and 0.125 seconds off).

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

   
   

   1. Turn the ignition switch off.

   2. Check that the steering wheel is centered.

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

   4. 

      Text in Illustration

      *a	Front view of 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 light blinks in the test mode 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

ABS SIGNAL CHECK

1. Lost Booster Pressure Judgment Check and Master Cylinder Pressure Sensor Zero Point Calibration

   Note

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

   
   

   1. Release the parking brake.

   2. Turn the ignition switch to ON.

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

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

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

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

      Note

      
      

      • 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 judgment check results are not normal, the master cylinder pressure sensor check cannot be performed.

      • If rechecking after the engine has started, end test mode, enter test mode again, and then release vacuum in the booster by pumping the brake pedal prior to rechecking.

2. Center Differential Lock Detection Switch Check

   
   

   1. Set the transfer position switch to the H4L position to lock the center differential.

      Tech Tips

      Move the vehicle either forward or backward a little to lock the center differential.

   2. Set the transfer position switch to the H4F position to unlock the center differential.

3. Speed Sensor Check

   Note

   
   

   • 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 (forward signal check).

   2. Check that the ABS warning light goes off.

      Tech Tips

      
      

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

   4. Check that the ABS warning light goes off.

      Tech Tips

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

   5. Stop the vehicle.

      Tech Tips

      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.

END OF SIGNAL CHECK

1. If the signal check is completed, the ABS warning light blinks (0.125 seconds on, and 0.125 seconds off) when the vehicle stops and the ABS warning light is off while the vehicle is being driven.

   Note

   If the signal check has not been completed, the ABS warning light blinks while driving and the ABS does not operate.

READ DTC OF SIGNAL CHECK FUNCTION

1. When using intelligent tester:

   
   

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

      Note

      
      

      • 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.

      Tech Tips

      Refer to Signal Check DTCs.

   2. Turn the ignition switch off and disconnect the intelligent tester.

2. When using SST check wire:

   
   
   1. 

      Text in Illustration

      *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 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.

      Tech Tips

      
      

      • 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.

      Tech Tips

      
      

      • 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.

LIST OF TEST MODE (SIGNAL CHECK) DTC