Toyota Tundra (2015 year). Manual — part 1122
The ECM performs OBD II monitoring based on the values from the intake air temperature sensor. If there is no
value by performing monitoring after the ignition switch is turned off or the engine is started (short soak or long
soak).
MONITOR STRATEGY
Related DTCs
P0111: Intake air temperature sensor rationality (After engine stop)
P0111: Intake air temperature sensor rationality (After cold engine
start)
Required Sensors/Components (Main)
Intake Air Temperature (IAT) sensor
Required Sensors/Components
(Related)
-
Duration
10 seconds or more
MIL Operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
All
Monitor runs whenever following DTCs are not
present
P0102, P0103 (Mass air flow meter)
P0112, P0113 (Intake air temperature sensor)
P0115, P0117, P0118 (Engine coolant temperature
sensor)
P2610 (Soak timer)
After Engine Stop
Time after engine start
10 seconds or more
Battery voltage
10.5 V or more
ECT change since engine stop
-40°C (-40°F) or more
ECT before engine stop
70°C (158°F) or more
Accumulated MAF amount before engine stop
6754 g or more
Key-off duration
30 minutes
After Cold Engine Start
Key-off duration
5 hours
Time after engine start
10 seconds or more
ECT
70°C (158°F) or more
Accumulated MAF amount
6754 g or more
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake A...
1. Duration while engine load is low
120 seconds or more
2. Duration while engine load is high
10 seconds or more
TYPICAL MALFUNCTION THRESHOLDS
After Engine Stop
IAT change
Less than 1°C (2°F)
After Cold Engine Start
IAT change
Less than 1°C (2°F)
CONFIRMATION DRIVING PATTERN
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].
6.
Idle the engine for 5 minutes or more [C].
HINT:
During steps [A] through [C], if the change in the intake air temperature is below 1°C (33.8°F),
the intake air temperature sensor (MAF meter) is malfunctioning. It is not necessary to continue
this procedure.
7.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
8.
Read the pending DTCs.
HINT:
9.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake A...
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10.
Input the DTC: P0111.
11.
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
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [E] and [F].
12.
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
13.
Check the DTC judgment result again [F].
HINT:
If the judgment result shows INCOMPLETE or N/A, perform steps [E] and [F] again.
14.
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.
15.
WIRING DIAGRAM
Refer to DTC P0112
.
INSPECTION PROCEDURE
PROCEDURE
1.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0111)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake A...
(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
P0111 and other DTCs are output
A
P0111 is output
B
HINT:
If any DTCs other than P0111 are output, troubleshoot those DTCs first.
Perform "Inspection After Repair" after replacing the mass air flow meter
.
B
REPLACE MASS AIR FLOW METER
A
GO TO DTC CHART
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake A...
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