Toyota Tundra (2015 year). Manual — part 1514
5.
CHECK HARNESS AND CONNECTOR (SENSOR GROUND)
(a) Disconnect the D7 mass air flow meter connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-2 (E2G) - Body ground
Always
Below 1 Ω
NG
GO TO STEP 6
OK
REPLACE MASS AIR FLOW METER
6.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the D7 mass air flow meter connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-2 (E2G) - D74-75 (E2G)
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM
7.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - INTEGRATION
RELAY)
(a) Check the EFI NO. 2 fuse.
(1) Remove the EFI NO. 2 fuse from the engine room relay block.
(2) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P010...
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
EFI NO. 2 fuse
Always
Below 1 Ω
(3) Reinstall the EFI NO. 2 fuse.
(b) Disconnect the D7 MAF meter connector.
(c) Remove the integration relay from the engine room relay block
.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D7-1 (+B) - 1B-4
Always
Below 1 Ω
D7-1 (+B) or 1B-4 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK ECM POWER SOURCE CIRCUIT
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0102,P010...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000001WPH095X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intake Air Temperature Sensor 1 Circuit
Range / Performance; 2015 MY Tundra [08/2014 - ]
DTC
P0111
Intake Air Temperature Sensor 1 Circuit Range / Performance
DESCRIPTION
The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the
IAT. The IAT sensor has a built-in thermistor with a resistance that varies according to the temperature
voltage changes (See Fig. 1).
changes, according to changes in the IAT, the voltage at terminal THA also varies. Based on this signal,
the ECM increases the fuel injection volume when the engine is cold to improve driveability.
DTC
NO.
DTC DETECTION CONDITION
TROUBLE
AREA
P0111
When either condition below is met:
The intake air temperature change is small, from the previous trip
warm-up to the following trip (2 trip detection logic).
1.
When the change in the intake air temperature after engine start is less
than the threshold value.
2.
Mass air flow
meter
MONITOR DESCRIPTION
The ECM performs OBD II monitoring based on the values from the intake air temperature sensor. If there is
sensor value by performing monitoring after the ignition switch is turned off or the engine is started (short
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intak...
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
-
MIL Operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
All:
Monitor runs whenever following DTCs are not stored
None
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
3240 g or more
Key-off duration
30 minutes
Mass air flow meter circuit failure (P0102, P0103)
Not detected
Intake air temperature circuit failure (P0112, P0113)
Not detected
Engine coolant temperature sensor circuit failure (P0115, P0117, P0118)
Not detected
Soak timer circuit failure (P2610)
Not detected
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
3240 g or more
1. Duration while engine load is low
120 seconds or more
2. Duration while engine load is high
10 seconds or more
Mass air flow meter circuit failure (P0102, P0103)
Not detected
Intake air temperature circuit failure (P0112, P0113)
Not detected
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0111; Intak...
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