DTC Check / Clear

NOTE: All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from on (IG) to ACC or off while in check mode.
Before changing modes, always check and make a note of any 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 current and pending DTCs.
Some DTCs are not set if the ECM does not detect the same malfunction again during the 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 the intelligent tester to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the tester on.
4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
5. Check for DTC(s) and freeze frame data, and then write them down.
6. Check the details of the DTC(s) (See DIAGNOSTIC TROUBLE CODE CHART ).

Fig 1: Connecting Intelligent Tester To DLC3

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

CLEAR DTC (Using the intelligent tester)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn the tester on.
4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES.
5. Press the YES button.
CLEAR DTC (Without using the 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 No. 1 and ETCS fuses from the Relay Block (R/B) located inside the engine compartment for more than 1 minute.