Toyota Tundra (2015 year). Manual — part 1519
TYPICAL ENABLING CONDITIONS
ECT sensor cold start monitor:
Monitor runs whenever following DTCs not stored
None
Battery voltage
10.5 V or more
Time after engine start
1 second or more
ECT at engine start
Less than 60°C (140°F)
Soak time
0 seconds or more
Accumulated MAF
8727 g or more
Fuel cut
OFF
Difference between ECT at engine start and IAT
Less than 40°C (72°F)
Intake air temperature sensor circuit failure (P0112, P0113)
Not detected
Engine coolant temperature circuit failure (P0115, P0117, P0118, P0125)
Not detected
Thermostat failure (P0128)
Not detected
ECT sensor soak monitor:
Monitor runs whenever following DTCs not stored
None
Battery voltage
10.5 V or more
Engine
Running
Soak time
5 hours or more
Either (a) or (b) condition met
-
(a) ECT
60°C (140°F) or more
(b) Accumulated MAF
17454 g or more
Intake air temperature sensor circuit failure (P0112, P0113)
Not detected
Engine coolant temperature circuit failure (P0115, P0117, P0118, P0125)
Not detected
Thermostat failure (P0128)
Not detected
Soak timer circuit failure (P2610)
Not detected
TYPICAL MALFUNCTION THRESHOLDS
ECT sensor cold start monitor:
ECT sensor value change
Less than 5°C (9°F)
ECT sensor soak monitor:
Difference between current ECT sensor value and previous ECT
sensor value when engine stopped
Less than 5°C (9°F) [varies with ECT of
last trip engine stop]
COMPONENT OPERATING RANGE
ECT
ECT sensor value changes in accordance with actual ECT
CONFIRMATION DRIVING PATTERN
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0116; Engi...
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
3.
Check that the coolant temperature is 60°C (140°F) or less.
4.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
5.
Turn the ignition switch off and wait for at least 30 seconds.
6.
Turn the ignition switch to ON and turn the Techstream on [A].
7.
Start the engine and idle it for 5 minutes or more [B].
HINT:
If the engine coolant temperature does not change by 5°C (9°F) or more, the ECT sensor is
malfunctioning. It is not necessary to continue this procedure.
8.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
9.
Read the pending DTC.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
10.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11.
Input the DTC: P0116.
12.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
13.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0116; Engi...
TESTER
DISPLAY
DESCRIPTION
N/A
Unable to perform DTC judgment
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E].
14.
Check the DTC judgment result again [E].
15.
If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E] again.
16.
If no pending DTC is output, perform a universal trip and check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
17.
INSPECTION PROCEDURE
HINT:
If DTC P0115, P0117, P0118 or P0125 is set simultaneously with DTC P0116, the ECT sensor may have
an open or a short circuit. 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.
PROCEDURE
1.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)
(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 the DTC.
Result
RESULT
PROCEED TO
P0116 is output
A
P0116 and other DTCs are output
B
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0116; Engi...
A
B
GO TO DTC CHART
2.
INSPECT THERMOSTAT
(a) Remove the thermostat
.
80 to 84°C (176 to 183°F)
HINT:
In addition to the above check, confirm that the valve is completely closed when the temperature is
below the standard.
(c) Reinstall the thermostat
.
NG
REPLACE THERMOSTAT
OK
REPLACE ENGINE COOLANT TEMPERATURE
SENSOR
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0116; Engi...
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