DTC Check / Clear

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

DTC CHECK (USING SST CHECK WIRE)
1. Check the DTCs (Present trouble code).
  1. Turn the engine switch on (IG), and wait for approximately 60 seconds.
  2. Using SST, connect terminals TC and CG of the DLC3.
    SST 09843-18040
    
    NOTE: Connect the terminals to the correct positions to avoid a malfunction.
  Fig 1: Identifying DLC3 Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the DTCs (Past trouble code).
  1. Using SST, connect terminals TC and CG of the DLC3.
    SST 09843-18040
    
    NOTE: Connect the terminals to the correct positions to avoid a malfunction.
  2. Turn the engine switch on (IG), and wait for approximately 60 seconds.
3. Read the DTCs.
  1. Read the blinking patterns of the DTCs. As examples, the blinking patterns for the normal system code and trouble codes 11 and 31 are shown in the illustration.
    - Normal system code indication (w/o past trouble code)
      The light blinks twice per second.
    - Normal system code indication (w/ past trouble code)
      When the past trouble code is stored in the center airbag sensor assembly, the light blinks only once per second.
    - Trouble code indication
    The first blinking indicates the first DTC. The second blinking occurs after a 1.5-second pause.
    
    If there are more than 1 code, there will be a 2.5-second pause between each code. After all codes are shown, there will be a 4.0-second pause, and then they all will be repeated.
    
    HINT:
    - If 2 or more malfunctions are found, the indication begins with the smaller numbered code.
    - If DTCs are indicated without connecting the terminals, proceed to the "Diagnosis Circuit " (See Diagnosis Circuit ).
Fig 2: Identifying Blinking Patterns Of DTCs
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC CLEAR (USING SST CHECK WIRE)
1. Clear the DTCs.
  1. When the engine switch is turned off, the DTCs are cleared.
    HINT:
    
    Depending on the DTC, the code may not be cleared by turning off the engine switch. In this case, proceed to the next procedure.
  2. Using SST, connect terminals TC and CG of the DLC3, and then turn the engine switch on (IG).
    SST 09843-18040
  3. Disconnect terminal TC of the DLC3 within 3 to 10 seconds after the DTCs are output, and check if the SRS warning light comes on after 3 seconds.
  4. Within 2 to 4 seconds after the SRS warning light comes on, connect terminals TC and CG of the DLC3.
  5. The SRS warning light should go off within 2 to 4 seconds after connecting terminals TC and CG of the DLC3. Then, disconnect terminal TC within 2 to 4 seconds after the SRS warning light goes off.
  6. The SRS warning light comes on again within 2 to 4 seconds after disconnecting terminal TC. Then, reconnect terminals TC and CG within 2 to 4 seconds after the SRS warning light comes on.
  7. Check if the SRS warning light goes off within 2 to 4 seconds after connecting terminals TC and CG of the DLC3. Also check if the normal system code is output within 1 second after the SRS warning light goes off.
  If DTCs are not cleared, repeat this procedure until the codes are cleared.
  
  Fig 3: Identifying Blinking Patterns Of SRS Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC CHECK
1. Check the DTCs.
  1. Connect the intelligent tester to the DLC3.
  2. Turn the engine switch on (IG).
  3. Check the DTCs by following the prompts on the tester screen.
    HINT:
    
    Refer to the intelligent tester operator's manual for further details.
2. Clear the DTCs.
  1. Connect the intelligent tester to the DLC3.
  2. Turn the engine switch on (IG).
  3. Clear the DTCs by following the prompts on the tester screen.
    HINT:
    
    Refer to the intelligent tester operator's manual for further details.
  Fig 4: Connecting Intelligent Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002