Diagnostic Trouble Codes Check/Clear

WARNING: This page is about a different car, the 2005 Toyota 4Runner. 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 hand-held tester. A hand-held 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.

CHECK DTC (Using a hand-held tester)
1. Connect a hand-held 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.
5. Check the DTC (s) and freeze frame data, and then write them down.
6. See DIAGNOSTIC TROUBLE CODE CHART to check the details of the DTC (s).
  
  Fig 1: Connecting Hand-Held Tester To DLC3 (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CLEAR DTC (Using the hand-held tester)
1. Connect the hand-held 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 / CLEAR CODES.
5. Press the YES button.
CLEAR DTC (Without using a hand-held tester) (a) 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.

NOTE: When disconnecting the battery cable, perform the INITIALIZE procedure.