DTC Check / Clear

WARNING: This page is about a different car, the 2007 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When the diagnosis system is changed from the normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are erased. Before changing modes, always check and make a note of DTCs and freeze frame data.

HINT:

DTCs which are stored in the ECM can be displayed on an intelligent tester. An intelligent tester can display the current and pending DTCs.
Same DTCs are not set if the ECM does not detect the same malfunction again during a second consecutive driving cycle. However, such malfunctions, detected on only one occasion, are stored as pending DTCs.

CHECK DTC (Using an intelligent tester)
1. Connect an intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
5. Check the DTC(s) and freeze frame data, and then write them down.
6. Check the details of the DTC(s) (See DIAGNOSTIC TROUBLE CODE CHART ).
CLEAR DTC (Using an intelligent tester)
1. Connect an intelligent tester to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES.
5. Press the YES button.
CLEAR DTC (Without using an intelligent tester)
1. Perform either one of the following operations:
  1. Disconnect the negative battery cable for more than 1 minute.
  2. Remove the EFI and ETCS fuses from the Engine Room No. 2 relay block, junction block located inside the engine compartment for more than 1 minute.