Toyota Tundra (2015 year). Manual — part 1243
(a) Connect the Techstream to the DLC3.
(b) Turn the Techstream on.
(c) Warm up the engine.
(d) Enter the following menus: Powertrain / Engine and ECT / Active
Test / Control the VVT System (Bank 1) or Control the VVT System
(Bank 2).
HINT:
When performing the Active Test, make sure the A/C is on and the shift
lever is in P or N.
(e) Check the engine speed while operating the Oil Control Valve (OCV)
using the Techstream.
OK:
TESTER
OPERATION
SPECIFIED CONDITION
OFF
Normal engine speed
ON
Soon after OCV switched from OFF to ON, engine idles
roughly or stalls
Result
RESULT
PROCEED TO
NG
A
OK
B
HINT:
GO TO STEP 54
A
REPLACE CAMSHAFT OIL CONTROL VALVE (for Intake
Side)
54.
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR)
(a) Connect the Techstream to the DLC3.
(b) Turn the Techstream on.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
(c) Warm up the engine.
(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear
(Bank1) or Control the VVT Exhaust Linear (Bank2).
HINT:
When performing the Active Test, make sure the A/C is on and the shift lever is in P or N.
(e) Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.
OK*1:
TESTER OPERATION
SPECIFIED CONDITION
0%
Normal engine speed
100%
Engine idles roughly or stalls
HINT:
REPLACE CAMSHAFT OIL CONTROL VALVE (for Exhaust
Side)
55.
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.
(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:
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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 72
NG
GO TO STEP 56
56.
INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly
.
(b) Check if the EGR valve assembly is stuck open.
OK:
EGR valve is tightly closed.
HINT:
Perform "Inspection After Repair" after replacing the EGR valve assembly
.
OK
GO TO STEP 72
NG
REPLACE EGR VALVE ASSEMBLY
57.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Check the harnesses and connectors, referring to DTC P0102 inspection procedure
.
HINT:
.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE MASS AIR FLOW METER
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
OK
58.
INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Inspect the engine coolant temperature sensor
.
HINT:
If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble
occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to
step 72 and perform fuel system troubleshooting A (steps 94 to 101), fuel system troubleshooting B (steps 102 to
104), intake system troubleshooting (steps 105 to 107), and ignition system troubleshooting (steps 108 to 113),
in that order.
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor
.
NG
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
59.
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P0115 inspection procedure
.
HINT:
REPAIR OR REPLACE HARNESS OR CONNECTOR
60.
CHECK MASS AIR FLOW METER
(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:
The A/C switch and all accessory switches should be off, and the shift lever should be in N or P.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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