DTC Check/Clear

NOTE:

If no DTC appears in normal mode:
On the OBD II scan tool or the intelligent tester, check the pending fault code using the Continuous Test Results function (Mode 7 for SAE J1979).
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 stored in the ECM can be displayed on the intelligent tester. The intelligent tester can display current and pending DTCs.
The some DTCs are not set if the ECM does not detect the same malfunction again during a second consecutive driving cycle. However, malfunctions detected on only one occasion are stored as pending DTCs.

CHECK DTC (Using the intelligent tester)
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 / 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 TABLE ).
NOTE:
- When simulating a symptom with the OBD II scan tool (excluding intelligent tester) to check the DTCs, use the normal mode. For DTCs subject to "2 trip detection logic", perform either of the following actions.
- Turn the ignition switch to OFF after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated again, the MIL illuminates and the DTCs are recorded in the ECM.
- Check the pending fault code using the Continuous Test Results function (Mode 7 for SAE J1979) on the OBD II scan tool.
Fig 1: Connecting Intelligent Tester To DLC3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
FREEZE FRAME DATA (Using the OBD II scan tool or intelligent tester)
1. Connect the OBD II scan tool or intelligent tester to the DLC3.
2. Turn the ignition switch ON.
3. Use the OBD II scan tool or intelligent tester to check the DTCs and freeze frame data and then write them down. For the intelligent tester, enter the following menus: DIAGNOSIS / OBD/MOBD / FREEZE FRAME DATA. For the OBD II scan tool, see its instruction manual.
CLEAR DTC (Using the OBD II scan tool or intelligent tester)
1. Connect the OBD II scan tool or the intelligent tester to the DLC3.
2. Turn the ignition switch ON.
3. Erase DTCs and freeze frame data with the OBD II scan tool (complying with SAE J1978) or the intelligent tester For the intelligent tester: 1) enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES; and 2) press YES. For the OBD II scan tool, see its instruction manual.
CLEAR DTC (Not using the OBD II scan tool or intelligent tester)
1. Remove the EFI and ETCS fuse from the engine room R/B for more than 60 seconds, or disconnect the battery terminal for more than 60 seconds. When disconnecting the battery terminal, perform the "INITIALIZE" procedure.