DTC Check / Clear

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

NOTE: When the diagnosis system is changed from 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 a intelligent tester. A intelligent tester can display current and pending DTCs.
Some 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.
The pending DTCs are set when the malfunction is detected once.

CHECK DTC (Using a intelligent tester)
1. Connect a intelligent tester to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the tester ON.
4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES or PENDING CODES.
5. Check DTCs and freeze frame data, and then write them down.
6. Proceed to DIAGNOSIS TROUBLE CODE CHART to check the details of the DTCs.
CLEAR DTC (Using the intelligent tester)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the tester ON.
4. Select the following menu items: DIAGNOSIS / ENHANCED OBD I) / DTC INFO / CLEAR CODES.
5. Press the YES button.
  
  Fig 1: Connecting Intelligent Tester To DLC3
  Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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 and ETCS fuses from the Relay Block (R/B) located inside the engine compartment for more than 1 minute.