Toyota Tundra (2015 year). Manual — part 1915
shown in the table below with the engine speed and engine load the same as Misfire RPM and
Misfire Load in the freeze frame data.
ENGINE RPM
DURATION
Idling
8.0 minutes or more
1000
4.5 minutes or more
2000
2.5 minutes or more
3000
1.5 minute or more
Check whether misfires have occurred by checking DTCs and freeze frame data.
HINT:
Do not turn the ignition switch off until the stored DTCs and freeze frame data have been
recorded. When the ECM returns to normal mode (default), the stored DTCs, 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 15 seconds.
11.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
12.
WIRING DIAGRAM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection
procedure.
HINT:
If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and
other data from the time the malfunction occurred.
If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions
stored in the freeze frame data.
If the misfire still cannot be reproduced even though the conditions stored in the freeze frame data have
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
A
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 set again by conducting the confirmation driving
pattern, after the repairs.
For 6 and 8 cylinder engines, the ECM intentionally does not set the specific misfiring cylinder DTCs at
high engine RPM. If misfires only occur during high engine RPM driving, only DTC P0300 is set.
.
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 set.
e.
1.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE CODES)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read DTCs.
Result
RESULT
PROCEED
TO
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 are output
A
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and/or P0308 and other DTCs are
output
B
HINT:
If any DTCs other than P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308 are
output, troubleshoot those DTCs first.
B
GO TO DTC CHART
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
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