Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GJ5Q |
Model Year Start: 2020 |
Model: Corolla |
Prod Date Range: [01/2019 - 04/2020] |
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P011B62; Engine Coolant Temperature / Intake Air Temperature Signal Compare Failure; 2020 MY Corolla Corolla HV [01/2019 - 04/2020] |
DTC
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P011B62
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Engine Coolant Temperature / Intake Air Temperature Signal Compare Failure
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DESCRIPTION
This engine uses an engine coolant temperature sensor and an intake air temperature sensor to detect temperatures related to engine operation. A thermistor, whose resistance value varies according to the temperature, is built into each sensor. When the temperature becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance decreases. These variations in resistance are transmitted to the ECM as voltage changes.
DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
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MIL
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Memory
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Note
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P011B62
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Engine Coolant Temperature / Intake Air Temperature Signal Compare Failure
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All of the following conditions are met (2 trip detection logic):
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The auxiliary battery voltage is 10.5 V or higher.
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7 hours or more have elapsed since the power switch was turned off in the previous trip.
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38 seconds or more have elapsed since a cold engine start was performed.
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Either of the following conditions is met:
-
The minimum intake air temperature after the engine starts is -10°C (14°F) or higher.
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The engine coolant temperature before the engine starts is -10°C (14°F) or higher.
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The difference between the readings of the engine coolant temperature and intake air temperature is higher than 25°C (45°F).
|
-
Intake air temperature sensor (mass air flow meter sub-assembly)
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Engine coolant temperature sensor
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ECM
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Comes on
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DTC stored
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-
SAE Code: P011B
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DTC for Mexico Models: Does not apply
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HINT:
-
Waiting is required to prevent the temperature of the engine from affecting the readings. If the engine has been operated recently, it is not possible to accurately compare the readings.
-
For diagnosis, in order to duplicate the detection conditions of the DTC, it is necessary to park the vehicle for 7 hours. Parking the vehicle for 7 hours ensures that the actual engine coolant temperature and intake air temperature are very similar. When the vehicle has been parked for less than 7 hours, differences in the readings may exist, but this does not necessarily indicate a fault.
MONITOR DESCRIPTION
The ECM monitors the difference between the engine coolant temperature and the intake air temperature when the engine is started cold to accurately detect the engine temperature conditions. The monitor runs when the engine is started after 7 hours or more have elapsed since the power switch was turned off in the previous trip. If the difference between the engine coolant temperature and the intake air temperature on a cold start exceeds 25°C (45°F), the ECM interprets this as a malfunction in the engine coolant temperature sensor circuit or intake air temperature sensor circuit, illuminates the MIL and stores this DTC.
MONITOR STRATEGY
Related DTCs
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P011B: Engine coolant temperature/intake air temperature sensor correlation
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Required Sensors/Components (Main)
|
Engine coolant temperature sensor
Intake air temperature sensor (mass air flow meter sub-assembly)
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Required Sensors/Components (Related)
|
-
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Frequency of Operation
|
Once per driving cycle
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Duration
|
-
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MIL Operation
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2 driving cycles
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Sequence of Operation
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None
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TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored
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None
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All of the following conditions are met
|
-
|
Soak time
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7 hours or more
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Auxiliary battery voltage
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10.5 V or higher
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Time after engine start
|
38 seconds or more
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Either of the following conditions is met
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(a) or (b)
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(a) Minimum intake air temperature after engine start
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-10°C (14°F) or higher
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(b) Engine coolant temperature before engine start
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-10°C (14°F) or higher
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Engine coolant temperature sensor circuit fail (P0117, P0118, P0125)
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Not detected
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Intake air temperature sensor circuit fail (P0112, P0113)
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Not detected
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Mass air flow meter circuit fail (P0102, P0103)
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Not detected
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Soak timer fail (P2610)
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Not detected
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Engine coolant pump circuit fail (P261B, P261C, P261D)
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Not detected
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Accumulated time after engine coolant pump speed higher than 900 rpm
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38 seconds or more
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TYPICAL MALFUNCTION THRESHOLDS
Deviated engine coolant temperature and intake air temperature
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Less than -25°C (-45°F), or higher than 25°C (45°F)
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CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
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When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
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Connect the Techstream to the DLC3.
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Turn the power switch on (IG) [A].
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Turn the Techstream on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the power switch off.
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With the engine stopped, leave the vehicle as is for 7.5 hours or more [B].
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Turn the power switch on (IG).
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Turn the Techstream on.
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Put the engine in Inspection Mode (Maintenance Mode).
Click here
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Start the engine and wait 70 seconds or more [C].
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Enter the following menus: Powertrain / Engine / Trouble Codes [D].
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Read the pending DTCs.
HINT:
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If a pending DTC is output, the system is malfunctioning.
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If a pending DTC is not output, perform the following procedure.
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Enter the following menus: Powertrain / Engine / Utility / All Readiness.
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Input the DTC: P011B62.
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Check the DTC judgment result.
Techstream Display
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Description
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NORMAL
|
-
DTC judgment completed
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System normal
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ABNORMAL
|
-
DTC judgment completed
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System abnormal
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INCOMPLETE
|
-
DTC judgment not completed
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Perform driving pattern after confirming DTC enabling conditions
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CAUTION / NOTICE / HINT
HINT:
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.
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CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P011B62)
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(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
|
Proceed to
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DTC P011B62 is output
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A
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DTC P011B62 and other DTCs are output
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B
|
HINT:
If any DTCs other than P011B62 are output, troubleshoot those DTCs first.
A
|
|
|
2.
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READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE)
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(a) Leave the vehicle for 7 hours or more.
HINT:
It is necessary to leave the vehicle for 7 hours or more to create conditions similar to the DTC detection conditions.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine / Data List / Intake Air Temperature.
Powertrain > Engine > Data List
Tester Display
|
Intake Air Temperature
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(f) According to the display on the Techstream, read the Data List.
Standard:
Difference between the intake air temperature and the actual outside air temperature is 10°C (18°F) or less.
HINT:
-
The temperature displayed on the outside temperature gauge of the vehicle (if equipped) is not suitable for comparing to the intake air temperature reading. The outside temperature gauge has a significant delay built in to prevent swings in the temperature display. Use an accurate thermometer to determine the outside air temperature.
-
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
Click here
OK
|
|
|
3.
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READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)
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(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
Powertrain > Engine > Data List
Tester Display
|
Coolant Temperature
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(e) According to the display on the Techstream, read the Data List.
Standard:
The difference between the engine coolant temperature and the actual outside air temperature is 10°C (18°F) or less.
HINT:
-
If the result is not as specified, check that there are no heat sources such as a block heater in the engine compartment.
-
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.
Click here
|