Diagnosis

INSPECT DIAGNOSIS




a. Check the DTC (Using LEXUS hand-held tester).
1. Prepare the LEXUS hand-held tester.
2. Connect the LEXUS hand-held tester to DLC3 under the instrument panel lower pad.
3. Turn the ignition switch ON and turn the LEXUS hand-held tester switch ON.
4. Use the LEXUS hand-held tester to check the DTCs and freeze frame data; note them down (For operating instructions, see the LEXUS hand-held tester instruction book.).
5. See the corresponding troubleshooting to confirm the details of the DTCs.




b. Check the DTC (Using diagnosis check wire).
1. Turn ignition switch ON.
2. Using SST, connect between terminals 11 (Tc) and 3 (E1) of DLC1.

SST 09843-18020

3. Read the diagnostic trouble code from malfunction indicator lamp (MIL).









HINT:
- If a DTC is not output, check the Tc terminal circuit.
- ECM controls the immobilizer function on this vehicle, DTC is out put with engine data.
- As an example, the blinking patterns for codes; normal, 99 are shown in the charts.

4. When DTC "99" is output, there is a trouble of immobilizer. Start troubleshooting referring to PROBLEM SYMPTOMS TABLE.
5. After completing the check, disconnect the SST from the DLC3 and turn off the display.

HINT: In the event of 2 or more malfunction codes, indication will begin from the smaller numbered code and continue in order to the larger.

c. Clear the DTC.
The following operations will erase the DTCs and freeze frame data.

- Operating the LEXUS hand-held tester to erase the codes (See the LEXUS hand-held tester instruction book for operating instructions.).
- Disconnecting the battery terminals or EFI fuse for 1 minute or more.