Section 475 (Abs With EBD, BA, TRAC & VSC System - Diagnostics): Pre-Check

1. Check the warning lights.
   1. Release the parking brake pedal.
   2. When the ignition switch is turned ON, check that the ABS warning light, VSC warning light, TRAC OFF indicator light, brake warning light and slip indicator light comes on for approx. 3 seconds.

      HINT:

      • When the parking brake is applied or the level of the brake fluid is low, the brake warning light comes on.
      • If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit, TRAC warning light circuit, TRAC OFF indicator light circuit, brake warning light circuit or slip indicator light circuit.
        Fig 1: Identifying Warning Lights

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        WARNING LIGHT TROUBLE AREAS
        
        

        Trouble Area	See
        ABS warning light circuit	ABS Warning Light Circuit (Does not light up)
        VSC warning light circuit	VSC Warning Light Circuit (Does not light up)
        TRAC OFF indicator light circuit	TRAC OFF Indicator Light, TRAC OFF Switch Circuit
        Brake warning light circuit	Brake Warning Light Circuit
        Slip indicator light circuit	Slip Indicator Light Circuit

2. When not using the hand-held tester:

   Check the DTC.

   1. Using SST, connect terminals TC and CG of the DLC3.

      SST 09843-18040

   Fig 2: Connecting Terminals TC & CG of DLC3 Using SST
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the ignition switch ON.
   3. Read the DTC from the ABS warning light and VSC warning light on the combination meter.

      HINT:

      • If no code appears, inspect the diagnostic circuit, ABS warning light circuit or VSC warning light circuit.
        WARNING LIGHT TROUBLE AREAS
        
        

        Trouble Area	See
        TC terminal circuit	TC Terminal Circuit
        ABS warning light circuit	ABS Warning Light Circuit (Does not light up)
        VSC warning light circuit	VSC Warning Light Circuit (Does not light up)

      • As an example, the blinking patterns for normal code and codes 11 and 21 are shown in Fig 3.
   4. Codes are explained in DIAGNOSTIC TROUBLE CODE CHART  .
   5. After completing the check, disconnect terminals TC and CG of the DLC3, and turn off the display.

      If 2 or more malfunction codes are identified at the same time, the DTC will be displayed in ascending order.

      Fig 3: Reading DTC Codes

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. When not using the hand-held tester:

   Clear the DTC.

   1. Using SST, connect terminals TC and CG of the DLC3.

      SST 09843-18040

   2. Turn the ignition switch ON.
   3. Clear the DTC stored in the ECU by depressing the brake pedal 8 times or more within 5 seconds.
   4. Check that the warning light indicates the normal code.
   5. Remove the SST from the terminals of the DLC3.

      SST 09843-18040

      Fig 4: Inspecting Brake Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Cancellation cannot be performed by removing the battery cable or ECU-IG fuse.

4. When using the hand-held tester:

   Check the DTC.

   1. Connect hand-held tester to the DLC3.
   Fig 5: Connecting Hand-Held Tester to DLC3
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the ignition switch ON.
   3. Read the DTC by following the prompts on the tester screen.

      HINT:

      Refer to the hand-held tester operator's manual for further details.

5. When using the hand-held tester:

   Clear the DTC.

   1. Connect the hand-held tester to the DLC3.
   Fig 6: Connecting Hand-Held Tester to DLC3
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the ignition switch ON.
   3. Operate the hand-held tester to erase the codes.

      HINT:

      Refer to the hand-held tester operator's manual for further details.

HINT:

According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor, actuator and so on without removing any parts. Reading the DATA LIST as a first step of troubleshooting is one of the method to shorten the labor time.

1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Read the "DATA LIST" on the tester.
   Fig 7: Data List Table (1 Of 2)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002