ABS Diagnosis System

A. Check the warning lights and buzzer.
1. Release parking brake lever.
2. When the ignition switch is turned ON, check that the ABS, VSC TRAC and BRAKE warning lights, VSC OFF, SLIP and ACTIVE TRAC indicator lights go on for 3 sec.
3. When depressing the brake pedal repeatedly it may turn on the ABS, VSC TRAC and BRAKE warning lights, VSC OFF indicator light and buzzer.

HINT: If the ECU stores DTC, ABS, VSC TRAC and BRAKE warning lights warning light and VSC OFF indicator light is ON.
If the indicator check result is not normal, proceed to troubleshooting for the ABS warning light circuit, VSC TRAC warning light circuit, brake warning light circuit, VSC OFF indicator light circuit, SLIP indicator light circuit and ACTIVE TRAC indicator light circuit.

Trouble Area
* ABS warning light circuit
* VSC TRAC warning light circuit
* BRAKE warning light circuit
* VSC OFF indicator light circuit
* SLIP indicator light circuit
* ACTIVE TRAC indicator light circuit





B. In case of not using LEXUS hand-held tester:
Check the DTC.

1. Using SST, connect terminals Tc and E1 of DLC1 or Tc and CG of DLC3.

SST 09843-18020 or 09843-18040

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

HINT: If no code appears, inspect the Tc circuit, ABS or VSC TRAC warning light circuit.

Trouble Area
* Tc circuit
* ABS warning light circuit
* VSC TRAC warning light circuit





As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.

4. Codes are explained in the code table.
5. After completing the check, disconnect terminals Tc and E1 of DLC1 or Tc and CG of DLC3 and turn off the display.
If 2 or more malfunctions are indicated at the same time the lowest numbered DTC will be displayed 1st.