Toyota Tundra (2015 year). Manual — part 1516
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P0113
Open in IAT sensor circuit for 0.5 seconds
(1 trip detection logic)
Open in IAT sensor circuit
IAT sensor (built into MAF
meter)
ECM
HINT:
TEMPERATURE DISPLAYED
MALFUNCTION
-40°C (-40°F)
Open circuit
140°C (284°F) or higher
Short circuit
MONITOR DESCRIPTION
The ECM monitors the sensor voltage and uses this value to calculate the IAT. When the sensor output voltage
deviates from the normal operating range, the ECM interprets this as a malfunction in the IAT sensor and
stores a DTC.
Example:
If the sensor output voltage is more than 4.91 V for 0.5 seconds or more, the ECM determines that there is an
open in the IAT sensor circuit, and sets DTC P0113. Conversely, if the output voltage is less than 0.18 V for 0.5
seconds or more, the ECM determines that there is a short in the sensor circuit, and sets DTC P0112.
If the malfunction is not repaired successfully, a DTC is stored 0.5 seconds after the engine is next started.
MONITOR STRATEGY
Related DTCs
P0112: IAT sensor range check (Low voltage)
P0113: IAT sensor range check (High voltage)
Required Sensors/Components (Main)
IAT sensor
Required Sensors/Components (Related)
-
Duration
0.5 seconds
MIL Operation
Immediate
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs not present
None
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF
TYPICAL MALFUNCTION THRESHOLDS
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113...
P0112:
IAT sensor voltage [IAT]
Less than 0.18 V [More than 128°C (262°F)]
P0113:
IAT sensor voltage [IAT]
More than 4.91 V [Less than -55°C (-67°F)]
COMPONENT OPERATING RANGE
IAT sensor voltage [IAT]
0.18 to 4.91 V [-55 to 128°C (-67 to 262°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.
5.
Wait 0.5 seconds or more.
6.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
7.
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.
8.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
9.
Input the DTC: P0112 or P0113.
10.
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
11.
If the test result is INCOMPLETE or N/A and 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.
12.
WIRING DIAGRAM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113...
INSPECTION PROCEDURE
HINT:
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.
READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE)
(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 / All Data / Intake Air.
(e) Read the value displayed on the Techstream.
Standard:
Same as actual Intake Air Temperature (IAT).
Result
TEMPERATURE DISPLAYED
PROCEED TO
-40°C (-40°F)
A
140°C (284°F) or higher
B
Same as actual IAT
C
HINT:
If there is an open circuit, the Techstream indicates -40°C (-40°F).
If there is a short circuit, the Techstream indicates 140°C (284°F) or higher.
B
GO TO STEP 4
C
CHECK FOR INTERMITTENT PROBLEMS
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113...
A
2.
READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)
(a) Disconnect the D7 MAF meter connector.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT
/ All Data / Intake Air.
(g) Read the value displayed on the Techstream.
Standard value:
140°C (284°F) or higher
NG
GO TO STEP 3
OK
CONFIRM GOOD CONNECTION TO SENSOR. IF
OK, REPLACE MASS AIR FLOW METER
3.
CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
(a) Disconnect the D7 MAF 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
D7-4 (THA) - D74-73 (THA)
Always
Below 1 Ω
D7-5 (E2) - D74-97 (ETHW)
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CONFIRM GOOD CONNECTION TO ECM. IF OK,
REPLACE ECM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0112,P0113...
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст