DTC Check / Clear

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 the intelligent tester or OBD II scan tool. The 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.

CHECK DTC
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the tester or ON.
4. Enter the following menus: 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 ).
Fig 1: Connecting Intelligent Tester To DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

When simulating a symptom with an OBD II scan tool to check DTCs in the DIAGNOSTIC TROUBLE CODE CHART subject to 2 trip detection logic, conduct either of the following operations. (For more information, refer to the scan tool instruction manual.)
- Check pending DTCs using the Continuous Test Result function (Mode 07 for SAE J1979).
- Simulate the symptom again after turning the ignition switch OFF upon finishing the first symptom simulation, so that the MIL is illuminated and the DTC(s) is stored in the ECM.
CLEAR DTC
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON.
3. Turn the tester ON.
4. Enter the following menus: 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 and ETCS fuses from the relay block located inside the engine compartment for more than 1 minute.
    NOTE: When disconnecting the battery cable, perform the INITIALIZE procedure (see INITIALIZATION ).