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DTC Check / Clear

NOTE:

If no DTC appears in normal mode:
On the OBD II or Techstream, 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 which are stored in the ECM can be displayed on Techstream. Techstream 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, malfunctions detected on only 1 occasion are stored as pending DTCs.

CHECK DTC (Using Techstream)
1. Connect Techstream to the DLC3.
2. Turn the power switch ON (IG) and turn the tester ON.
3. Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
4. Check for DTCs and freeze frame data, and then write them down.
5. Check the details of the DTC (s) (see DIAGNOSTIC TROUBLE CODE CHART ).
  NOTE: Turn the HV main system OFF (IG OFF) after the symptom is duplicated once. Then repeat the simulation process again. When the problem has been duplicated again, the MIL illuminates and the DTCs are recorded in the ECM.
CLEAR DTC (Using Techstream)
1. Connect Techstream to the DLC3.
2. Turn the power switch ON (IG) and turn the tester ON.
3. Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
4. Press the YES button.
NOTE: Clearing the DTCs will also clear the freeze frame data, detailed information and operation history data.
CLEAR DTC (Without Using Techstream)
1. Remove the EFI and ETCS fuses from the engine room relay block for more than 60 seconds, or disconnect the battery cable for more than 60 seconds.
  NOTE: After reconnecting the battery cable, perform the "INITIALIZE" procedure (see INITIALIZATION ).
  
  Fig 1: Identifying EFI, ETCS Fuses Of Engine Room Relay Block
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002