Toyota Tundra (2015 year). Manual — part 1151
OK
OK
10.
INSPECT ECM TERMINAL OF MISFIRING CYLINDER
(a) Disconnect the ECM connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table
below.
Standard Voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
D74-86 (#10) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-109 (#20) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-85 (#30) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-108 (#40) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-84 (#50) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-107 (#60) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-83 (#70) - D74-43
(E01)
Ignition switch ON
11 to 14 V
D74-106 (#80) - D74-43
(E01)
Ignition switch ON
11 to 14 V
NG
GO TO FUEL INJECTOR CIRCUIT
11.
CHECK FUEL INJECTOR OF MISFIRING CYLINDER
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
OK
OK
OK
(a) Check the injector injection [whether fuel volume is high or low, and whether injection pattern is
poor]
.
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly
.
NG
REPLACE FUEL INJECTOR ASSEMBLY
12.
CHECK INTAKE SYSTEM
(a) Check the intake system for vacuum leakage
.
OK:
No leakage in intake system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the intake system
.
NG
REPAIR OR REPLACE INTAKE SYSTEM
13.
CHECK FUEL PRESSURE
(a) Check the fuel pressure
.
NG
GO TO STEP 36
14.
READ VALUE USING TECHSTREAM (COOLANT TEMP)
NG
REPLACE ENGINE COOLANT TEMPERATURE
SENSOR
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
OK
OK
OK
15.
READ VALUE USING TECHSTREAM (MAF)
(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 / MAF and Coolant Temp.
(e) Allow the engine to idle until Coolant Temp reaches 75°C (167°F) or higher.
(f) Read the MAF with the engine speed at 3000 rpm.
Standard:
Between 18.3 gm/sec. and 25.8 gm/sec. (shift lever: N; A/C: Off)
NG
GO TO STEP 31
16.
CHECK VALVE TIMING
NG
ADJUST VALVE TIMING
17.
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or
higher.
HINT:
When performing the Active Test, make sure the shift lever is in P or N.
The A/C switch and all accessory switches should be off.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step
Position.
(e) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the
Data List while performing the Active Test.
HINT:
Do not leave the EGR valve open for 10 seconds or more during the Active Test.
Be sure to return the EGR valve to step 0 when the Active Test is completed.
OK:
MAP and idling condition change in response to EGR step position as follows.
Standard:
-
EGR STEP POSITION (ACTIVE TEST)
0 STEPS
0 TO 30 STEPS
Idling
condition
Steady idling
Idling changes from steady to rough idling or engine stall
MAP
(Data List)
20 to 40 kPa (150 to 300
mmHg)
MAP value is at least +10 kPa (75 mmHg) higher than when EGR
valve is fully closed
OK
GO TO STEP 31
NG
GO TO STEP 18
18.
INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly
.
(b) Check if the EGR valve is stuck open.
OK:
EGR valve is tightly closed.
HINT:
Perform "Inspection After Repair" after replacing the EGR valve assembly
.
OK
GO TO STEP 31
NG
REPLACE EGR VALVE ASSEMBLY
19.
CHECK INTAKE SYSTEM
(a) Check the intake system for vacuum leakage
.
OK:
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...
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