Toyota Tundra (2015 year). Manual — part 1149

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.

1.

Turn the ignition switch to ON.

2.

Turn the Techstream on.

3.

Record the DTC(s) and freeze frame data.

4.

Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

5.

Using the Techstream, switch the ECM from normal mode to check mode

.

6.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...

count is displayed, skip the following confirmation driving pattern.

Drive the vehicle several times with the conditions, such as engine rpm and engine load, as shown in

Misfire RPM and Misfire Load in the freeze frame data.

HINT:

ENGINE RPM

DURATION

Idling

8.0 minutes or more

1000

4.5 minutes or more

2000

2.5 minutes or more

3000

1.5 minutes or more

8.

Check whether misfires have occurred by checking DTCs and freeze frame data.

HINT:

Do not turn the ignition switch off until the stored DTC(s) and freeze frame data have been

recorded. When the ECM returns to normal mode (default), the stored DTC(s), freeze frame
data and other data will be cleared.

9.

Record the DTC(s), freeze frame data and misfire counts.

10.

Turn the ignition switch off and wait for at least 5 seconds.

11.

Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

12.

INSPECTION PROCEDURE

HINT:

a.

Improper fuel is used.

b.

The spark plugs are dirty.

c.

After finishing repairs, check that no misfires occur in each cylinder (cylinder No. 1, No. 2, No. 3, No. 4,
No. 5, No. 6, No. 7 and No. 8).
Be sure to confirm that no misfiring cylinder DTCs are stored again by conducting the confirmation driving
pattern after the repairs.
For 6 and 8 cylinder engines, the ECM intentionally does not store the specific misfiring cylinder DTCs at
high engine RPM. If misfires only occur during high engine RPM driving, only DTC P0300 is stored.

.

a.

Start the engine and conduct the confirmation driving pattern.

b.

Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC.

d.

After finishing repairs, conduct the confirmation driving pattern again, in order to verify that

DTC P0300 is not stored.

e.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...