DTC Check / Clear

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC (HV CONTROL ECU)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the intelligent tester on.
3. Using the intelligent tester, check the DTCs and freeze frame data and then write them down. On the intelligent tester, enter the following menus: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
4. Confirm the details of the DTCs. (See DIAGNOSTIC TROUBLE CODE CHART )
CHECK FREEZE FRAME DATA AND INFORMATION
1. If a DTC is present, select that DTC in order to display its freeze frame data.
  
  Fig 1: Checking Freeze Frame Data Screen Display
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Read freeze frame data recorded when the DTC was set.
  NOTE: An information code (INF code) is displayed in one of the INFORMATION lines 1 to 5. Check the details by following the procedures in the following steps.
  
  HINT:
  
  In the case shown in the illustration, refer to troubleshooting for DTC P3140 and INF code 350.
  
  Fig 2: Identifying INF Code 350 Screen Display
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Read the information.
  1. Select the item that has an INF code from among INFORMATION 1 to 5 on the freeze frame data screen.
  2. Press ENTER.
    
    Fig 3: Identifying INF Code 350 Screen Display
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Information is displayed as shown in the illustration.
CHECK DTC (SYSTEMS OTHER THAN HV CONTROL ECU)
HINT:

The HV control ECU maintains mutual communication with the computers, including the ECM, battery ECU, skid control ECU, power steering ECU and others. Therefore, if the HV control ECU outputs a warning, it is necessary to check and record the DTCs of all the systems.
1. Connect the intelligent tester to the DLC3.
  
  Fig 4: Information Screen Display
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the power switch ON and turn the intelligent tester on.
3. On the intelligent tester, enter the following menus: DIAGNOSIS / OBD/MOBD / CODES (All).
4. If DTCs are present, check the relevant systems.
  HINT:
  
  If DTCs for the CAN communication system are present in addition to other DTCs, first troubleshoot and repair any malfunctions in the CAN communication.
CLEAR DTC
NOTE: Clearing the DTCs will also clear the freeze frame data, information (see INFORMATION / FREEZE FRAME DATA ) and operation history data (see OPERATION HISTORY DATA ).
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the intelligent tester on.
3. Check that the shift position is in the P position.
4. Clear DTCs and freeze frame data with the intelligent tester.
  1. Enter the following menus: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CLEAR CODES.
  2. Press YES.