Brakes - Abs (Diagnostics): Pre-Check

1. DIAGNOSIS SYSTEM 
   1. Check the indicator.

      When the ignition switch is turned ON, check that the ABS warning light on the instrument panel goes on for approx. 3 seconds.

      Fig 1: Identifying ABS Warning Light

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit (See ABS WARNING LIGHT CIRCUIT ).
   2. In case of not using TOYOTA hand-held tester: Check the DTC.
      1. Using SST, connect terminals TC and CG of DLC3. SST 09843-18040
      Fig 2: Connecting Terminals TC And CG Of DLC3
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Turn the ignition switch ON.
      3. Read the DTC from the ABS warning light on the combination meter.
         NOTE:

         • If no code appears, inspect the diagnostic circuit or ABS warning light circuit (See TC TERMINAL CIRCUIT  or ABS WARNING LIGHT CIRCUIT ).
         • As an example, the blinking patterns for normal code and codes 11 are shown on the left.
         • Even if 2 or more malfunctions are detected, the lowest numbered DTC will be displayed.
           Fig 3: Blinking Patterns For Normal Code And Codes 11

           Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Codes are explained in the code table on page ##DI-427.
      5. After completing the check, disconnect terminals TC and CG, and turn off the ignition switch.
   3. In case of using TOYOTA hand-held tester: Check the DTC.
      1. Hook up the TOYOTA hand-held tester to the DLC3.
      2. Turn the ignition switch ON.
      3. Read the DTC by following the prompts on the tester screen. Please refer to the Toyota hand-held tester operator's manual for further details.
      Fig 4: Checking DTC Using Toyota Hand-Held Tester
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. In case of not using TOYOTA hand-held tester: Clear the DTC.
      1. Using SST, connect terminals TC and CG of DLC3. SST 09843-18040
      2. Turn the ignition switch ON.
      3. Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.
      Fig 5: Clearing DTC Stored In ECU By Depressing Brake Pedal
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Check that the warning light shows the normal code.
      5. Remove the SST from the terminals of DLC3. SST 09843-18040
   5. In case of using TOYOTA hand-held tester: Clear the DTC.
      1. Hook up the TOYOTA hand-held tester to the DLC3.
      Fig 6: Checking DTC Using Toyota Hand-Held Tester
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Turn the ignition switch ON.
      3. Operate the Toyota hand-held tester to erase code (See Toyota hand-held tester operator's manual).
2. SPEED SENSOR SIGNAL CHECK (TEST MODE) 
   1. Hook up the TOYOTA hand-held tester to the DLC3.
   Fig 7: Checking DTC Using Toyota Hand-Held Tester
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Start the engine.
   3. Drive vehicle faster than 45 km/h (28 mph) for several seconds.
      NOTE: There is a case that the sensor check is not completed if the vehicle has its wheels spined or its steering wheel steered during this check.
   4. Read the DTC, from TOYOTA hand-held tester screen.
   NOTE: See the list of DTC shown on the next page.

   Please refer to the Toyota hand-held tester operator's manual for further details.

DTC Of Speed Sensor Check Function: 

Fig 8: DTC Of Speed Sensor Check Function

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002