Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Dtc Check / Clear

DTC CHECK / CLEAR

HINT:

• DTCs which are stored in the skid control ECU (brake booster with master cylinder assembly) can be displayed on the Techstream. The Techstream can display the current, pending and permanent DTCs.
• If a malfunction is detected during the current driving cycle, current and permanent DTCs are stored.
• Current DTCs can be cleared by using the Techstream. However, permanent DTCs cannot be cleared using either of these two methods.
• After clearing current DTCs using the Techstream, permanent DTCs can be cleared when the system is determined to be normal for the relevant DTCs and then the universal trip is performed. The driving pattern to obtain a normal judgment is described under the "Confirmation Driving Pattern" for the respective DTC.

HINT:

• Obtaining a normal judgment and performing a universal trip driving pattern can be done in the same driving cycle or in different driving cycles.
• Ensure to wait at least 2 minutes between each trip.

CHECK DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(e) Check the DTC(s) and freeze frame data, and then write them down.

(f) Check the details of the DTC(s).

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CLEAR DTC (PENDING AND CURRENT DTC)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(e) Clear the DTCs.

CLEAR PERMANENT DTC

HINT:

Even if the following procedure is not performed, permanent DTCs are cleared by obtaining a normal judgment during 3 consecutive driving cycles.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

HINT:

If "PERMANENT" in the top right of the screen displays "YES", permanent DTCs are stored.

(e) Change the tab from "Enhanced" to "Generic".

(f) Check if permanent DTCs are stored.

HINT:

If permanent DTCs are not output, it is not necessary to continue this procedure.

(g) Clear the DTCs.

(h) Perform the respective confirmation driving patterns in order to obtain a normal judgment for the output DTCs.

HINT:

For the confirmation driving pattern, refer to the procedures for the relevant DTC.

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(i) Perform the universal trip.

CAUTION:

When performing a driving pattern, obey all speed limits and traffic laws.

1. Put the engine in Inspection Mode (Maintenance Mode).

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2. Start the engine.
3. Idle the engine for 30 seconds or more.
4. With the engine running, drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more.

   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.
   • If the engine stops, further depress the accelerator pedal to restart the engine.
5. Allow 10 minutes or more to elapse from the time the engine is started.

(j) Turn the power switch off.

(k) Wait 2 minutes or more.

(l) Turn the power switch on (IG).

(m) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(n) Check that the permanent DTCs have been cleared.

HINT:

The permanent DTCs are cleared when the universal trip is completed.