Toyota Tundra (2015 year). Manual — part 1150
A
OK
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 is 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
2.
CHECK PCV HOSE CONNECTIONS
(a) Check the PCV hose connections.
OK:
PCV hose is connected correctly and is not damaged.
NG
REPAIR OR REPLACE PCV HOSE
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
NEXT
A
3.
READ VALUE USING TECHSTREAM (MISFIRE RPM AND MISFIRE LOAD)
(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 / Data List / Misfire RPM and Misfire Load.
(e) Read and note the Misfire RPM and Misfire Load values.
HINT:
The Misfire RPM and Misfire Load values indicate the vehicle conditions under which the misfire occurred.
4.
READ VALUE USING TECHSTREAM
(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 / Data List / Catalyst OT MF F/C.
(e) Read the value displayed on the Techstream.
Result
DATA LIST
TECHSTREAM DISPLAY
PROCEED TO
Catalyst OT MF F/C
AVAIL (Avail)
A
NOT AVL (Not Avl)
B
B
GO TO STEP 6
5.
PERFORM ACTIVE TEST USING TECHSTREAM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
NEXT
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs
.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Prohibit the Catalyst OT
Misfire prevent F/C.
(f) Perform the Active Test.
NOTICE:
When performing the Active Test, make sure the vehicle is stopped and either idling or being revved within
3000 rpm.
6.
READ VALUE USING TECHSTREAM (MISFIRE COUNT)
(a) Enter the following menus: Powertrain / Engine and ECT / Data List / Cylinder #1 Misfire Count to
Cylinder #8 Misfire Count.
(b) Allow the engine to idle.
(c) Read each value for Cylinder #1 Misfire Count to Cylinder #8 Misfire Count displayed on the
Techstream. If no misfire counts occur in any cylinders, perform the following procedures:
(1) Move the shift lever to D.
(2) Check Cylinder #1 Misfire Count to Cylinder #8 Misfire Count.
(3) If misfire counts are still not displayed, perform procedure "A" and "B", and then check the misfire
counts again.
Procedure A: Drive the vehicle with the Misfire RPM and Misfire Load noted in the "Read value using Techstream
(Misfire RPM and Misfire Load)" procedures above.
Procedure B: Read Cylinder #1 Misfire Count to Cylinder #8 Misfire Count or DTCs displayed on the Techstream.
Result
RESULT
PROCEED TO
Most misfires occur in only 1 or 2 cylinders
A
3 cylinders or more have equal misfire counts
B
HINT:
A
OK
NEXT
GO TO STEP 19
7.
INSPECT SPARK PLUG
.
HINT:
Perform "Inspection After Repair" after replacing the spark plug
.
NG
REPLACE SPARK PLUG
8.
CHECK FOR SPARK (SPARK TEST)
(a) Perform the spark test
.
HINT:
.
9.
CHECK CYLINDER COMPRESSION PRESSURE
.
HINT:
Perform "Inspection After Repair" after repairing or replacing the engine assembly
.
NG
CHECK ENGINE TO DETERMINE CAUSE OF LOW
COMPRESSION
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
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