Abs With EBD & BA & TRAC & VSC System (From July, 2003) - Diagnostics: Pre-Check

1. Check the warning lights.
   1. Release parking brake pedal.
      NOTE: When releasing the parking brake, set the chocks to hold the vehicle for safety.

      HINT:

      When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.

   2. When the ignition switch is turned to the ON position, check that the ABS warning light, BRAKE warning light, VSC warning light, TRAC OFF indicator light and SLIP indicator light remain on for approx. 3 seconds.

   HINT:

   • If the ECU has any stored DTCs, the ABS warning light, VSC warning light and TRAC OFF indicator light come on.
   • If the indicator does not come on, inspect if the bulb is blown out, and also the wire harness between the skid control ECU and the combination meter.
   • If the indicator remains on, proceed to troubleshooting for the light circuit below.

Fig 1: Identifying DLC3 Connector TC And CG Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

      SST 09843-18040

   2. Turn the ignition switch to the ON position.
   3. Read the DTC from the ABS warning light or VSC warning light on the combination meter.

      HINT:

      • If 2 or more malfunctions are detected at the same time, the lowest numbered code will be displayed first.
      • If no code appears, inspect the diagnostic circuit, ABS warning light circuit or VSC warning light circuit.
        TROUBLE AREA DETAILS
        
        

        Trouble Area	See
        TC and CG terminal circuit	TC TERMINAL CIRCUIT
        ABS warning light circuit	ABS WARNING LIGHT CIRCUIT (REMAINS ON)  or ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
        VSC warning light circuit	VSC WARNING LIGHT CIRCUIT (REMAINS ON)  or VSC WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)

        Fig 2: Identifying Indicator Normal Blinking Pattern

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • As an example, the blinking patterns for a normal system code and codes 11 and 21 are shown on the left.
   4. Codes are explained in the code table on DIAGNOSTIC TROUBLE CODE CHART  .
   5. After completing the check, disconnect terminals TC and CG of the DLC3, and turn off the display.
   Fig 3: Identifying DTC Clearing Procedure

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Clear DTCs.
   1. Using SST, connect terminals TC and CG of the DLC3.

      SST 09843-18040

   2. Turn the ignition switch to the ON position.
   3. Clear the DTCs stored in the ECU by depressing the brake pedal 8 or more times within 5 sec.
   4. Check that the ABS warning light and VSC warning light show normal blinking patterns.
   5. Remove the SST from the DLC3.

      SST 09843-18040

1. Check DTCs.
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch to the ON position.
   3. Read the DTCs following the prompts on the tester screen.

   HINT:

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

2. Clear the DTCs.
   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch to the ON position.
   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 on the hand-held tester, you can read the value and status of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one of the methods to shorten labor time.

1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. From the display on the tester, read the "DATA LIST".
   Fig 4: Data List Chart (1 Of 3)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002