DTC Check / Clear [10/2018 - 07/2022]

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 cleared. Before changing modes, always check and make a note of DTCs and freeze frame data.

HINT:

DTCs which are stored in the TCM can be displayed on the Techstream. The Techstream can display confirmed, pending and permanent DTCs.
If a malfunction is detected during the current driving cycle, confirmed and permanent DTCs are stored.
Some DTCs are not stored if the TCM does not detect the same malfunction again during a second consecutive driving cycle. However, such malfunctions, detected during only one driving cycle, are stored as pending DTCs.
Confirmed and pending DTCs can be cleared by using the Techstream. However, permanent DTCs cannot be cleared using the Techstream.
After clearing confirmed DTCs using the Techstream, permanent DTCs can be cleared when the universal trip is performed and then the system is determined to be normal for the relevant DTCs. The driving pattern to obtain a normal judgment is described under the "Confirmation Driving Pattern" for the respective DTC.
To clear permanent DTCs, all of the following conditions must be met:
- A universal trip has been performed.
- The vehicle has been judged as normal for 2 trips. (Normal judgment does not have to be performed in 2 consecutive trips, but normal judgment should have occurred in the latest trip.)
- No malfunctions are detected.

2 TRIP DETECTION EXAMPLES

Pending DTC	Store condition	Malfunction detected
Pending DTC	Clear condition	System determined to be normal or DTCs cleared using Techstream
Confirmed DTC	Store condition	Malfunction detected (2nd trip)
Confirmed DTC	Clear condition	No malfunctions in 40 driving cycles or DTCs cleared using Techstream
Permanent DTC	Store condition	Malfunction detected (2nd trip)
Permanent DTC	Clear condition	Engine switch turned on (IG) after no malfunction is detected in 3 consecutive driving cycles or After DTCs cleared using Techstream, universal trip performed and normal judgment obtained for 2 trips
MIL	ON	Malfunction detected (2nd trip)
MIL	OFF	Engine switch turned on (IG) after no malfunction is detected in 3 consecutive driving cycles or DTCs cleared using Techstream

Fig 1: Detection Logic Example

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Detection Logic Example And Clearing DTCs

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK DTC

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Powertrain / Transmission / Trouble Codes.
Powertrain > Transmission > Trouble Codes

Check for DTCs and freeze frame data, and write them down.

HINT:

Techstream Display	Description
Test Failed	Shows the malfunction judgment results during the current trip.
Pending	Shows the malfunction judgment results up to now. (Indicates the possibility of a malfunction when no DTC is confirmed.)
Confirmed	Shows the DTCs confirmed up to now. (The number of current trips differs for each DTC.)

Check the details of the DTCs.
Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 10/2019] Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 07/2022]

NOTE:
When simulating a symptom and using the Techstream to check for DTCs, use normal mode. For DTCs in the Diagnostic Trouble Code Chart subject to "2-trip detection logic", perform the following:

Turn the engine switch off after the symptom is simulated once. Then repeat the simulation process. When the symptom has been simulated twice, the MIL will illuminate and DTCs will be stored in the TCM.

CLEAR DTC (Pending and Confirmed DTC)
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Transmission / Trouble Codes.
  Powertrain > Transmission > Clear DTCs
5. Clear the DTCs.
CLEAR PERMANENT DTC
1. After clearing confirmed DTCs using the Techstream, permanent DTCs can be cleared when the universal trip is performed and then the system is determined to be normal for the relevant DTCs. The driving pattern to obtain a normal judgment is described under Confirmation Driving Pattern for the respective DTC.
2. To clear permanent DTCs, all of the following conditions must be met:
  - A universal trip has been performed.
  - The vehicle has been judged as normal for 2 trips. (Normal judgment does not have to be performed in 2 consecutive trips, but normal judgment should have occurred in the latest trip.)
  - No malfunctions are detected.
    
    Fig 3: Driving Pattern To Clear Permanent DTCs
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Transmission / Trouble Codes.
  Powertrain > Transmission > Trouble Codes
  
  HINT:
  
  If "YES" is displayed for the value of "PERMANENT" at the top right of the Techstream screen, permanent DTCs are stored.
5. Select the "Generic" tab.
6. Check if permanent DTCs are stored.
  HINT:
  
  If permanent DTCs are not output, it is not necessary to continue this procedure.
7. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  Powertrain > Transmission > Clear DTCs
  
  NOTE:
  Do not clear the DTCs after performing this step.
8. Perform the universal trip.
  HINT:
  
  The universal trip driving pattern and normal judgment procedure can be performed consecutively in the same driving cycle.
  
  Fig 4: Universal Trip Driving Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Start the engine and wait for 30 seconds or more.
  2. Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more.
    WARNING:
    When performing a driving pattern, obey all speed limits and traffic laws.
    
    HINT:
    
    It is possible to complete the drive pattern even if the vehicle decelerates to less than 40 km/h (25 mph) during the driving cycle provided that the vehicle is driven at 40 km/h (25 mph) or more for a total of 5 minutes.
  3. Allow 10 minutes or more to elapse from the time the engine started.
9. Turn the engine switch off and wait for 2 minutes or more.
10. Perform the normal judgment procedure in the respective confirmation driving pattern of each output DTC.
  HINT:
  
  Do not turn the engine switch off by mistake during this step.
11. With the engine switch on (IG), wait for 5 seconds or more.
12. Turn the engine switch off and wait for 2 minutes or more.
13. Turn the engine switch on (IG).
14. Enter the following menus: Powertrain / Transmission / Trouble Codes.
  Powertrain > Transmission > Trouble Codes
15. Check that the permanent DTCs have been cleared.
  HINT:
  
  If permanent DTCs are not output, it is not necessary to continue this procedure.
16. Perform the normal judgment procedure in the respective confirmation driving pattern of each output DTC.
  HINT:
  
  Do not turn the engine switch off by mistake during this step.
17. With the engine switch on (IG), wait for 5 seconds or more.
18. Turn the engine switch off and wait for 2 minutes or more.
19. Turn the engine switch on (IG).
20. Enter the following menus: Powertrain / Transmission / Trouble Codes.
  Powertrain > Transmission > Trouble Codes
21. Check that the permanent DTCs have been cleared.
  HINT:
  
  Permanent DTCs will be cleared if a normal judgment is obtained during 3 consecutive driving cycles with the MIL illuminated.