Diagnosis System

DIAGNOSIS SYSTEM




a. Check the indicator.
When the ignition switch is turned ON, check that the VSC warning light, VSC OFF indicator light and SLIP indicator light comes on for about 3 seconds.

HINT:
- If the ECU stores DTC, VSC warning light and VSC OFF indicator light are on.
- If the indicator check result is not normal, proceed to troubleshooting for the VSC warning light circuit, VSC OFF indicator light circuit, and SLIP 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 the DLC1 or terminals Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
2. Turn the ignition switch ON.
3. Read the DTC from the VSC warning light on the combination meter.

HINT:
- If no code appears, inspect the diagnostic circuit or VSC warning light circuit.





- As an example, the blinking patterns for the normal code and code 31 and 32 are shown in the illustration.

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





c. In case of using LEXUS hand-held tester:
Check the DTC.
1. Connect the LEXUS hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Read the DTC by following the prompts on the tester screen.




d. In case of not using LEXUS hand-held tester:
Clear the DTC.
1. Using SST, connect terminals Tc and E1 of the DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
2. Turn the ignition switch ON.
3. Clear the DTC stored in the ECU by depressing the brake pedal 8 or more times within 5 seconds.
4. Check that the warning light shows the normal code.
5. Remove the SST from the terminals of the DLC1 or the DLC3.
SST 09843-18020 or 09843-18040




e. In case of using LEXUS hand-held tester:
Clear the DTC.
1. Connect the LEXUS hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Operate the LEXUS hand-held tester to erase the codes.