Toyota Tundra (2015 year). Manual — part 1193
OK
OK
HINT:
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Short FT #1 and Long FT #1,
or Short FT #2 and Long FT #2.
(e) Read the values displayed on the Techstream.
(f) Add together the Short FT #1 and Long FT #1, or Short FT #2 and Long FT #2 values to obtain the
total fuel trim.
GO TO STEP 7
3.
INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (THROTTLE BODY)
(a) Check for deposits around the throttle valve and check the throttle valve condition.
OK:
No deposits around throttle valve and throttle valve moves smoothly.
NG
GO TO STEP 6
4.
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.
(c) Turn the Techstream on.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
(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 19
NG
GO TO STEP 5
5.
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.
OK
GO TO STEP 19
NG
GO TO STEP 17
6.
REPAIR OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY
(a) Repair or replace the throttle with motor body assembly
.
HINT:
Perform "Inspection After Repair" after repairing or replacing the throttle with motor body assembly
.
NEXT
GO TO STEP 19
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
OK
OK
OK
7.
CHECK PCV SYSTEM
(a) Check the PCV hose connections
.
OK:
PCV hose is connected correctly and is not damaged.
NG
GO TO STEP 14
8.
CHECK INTAKE SYSTEM
(a) Check the intake system for vacuum leak
.
NG
GO TO STEP 15
9.
INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
(a) Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with
dirt or oil.
OK:
Air cleaner filter element is not excessively contaminated with dirt or oil.
NG
GO TO STEP 16
10.
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.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
OK
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.
(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 12
NG
GO TO STEP 11
11.
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.
NG
GO TO STEP 17
12.
PERFORM ACTIVE TEST USING TECHSTREAM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P050A; Cold S...
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