Last Modified: 07-31-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026N81 |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P00B111; Radiator Coolant Temperature Sensor Circuit Short to Ground; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
DTC
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P00B111
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Radiator Coolant Temperature Sensor Circuit Short to Ground
|
DESCRIPTION
The No. 2 engine coolant temperature sensor is installed to the radiator pipe assembly between the engine and radiator and monitors the thermostat operation.
The structure of the thermistor used in the No. 2 engine coolant temperature sensor and its connection to the ECM are the same as those of the intake air temperature sensor.
Refer to DTC P011011.
Click here
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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P00B111
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Radiator Coolant Temperature Sensor Circuit Short to Ground
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The No. 2 engine coolant temperature sensor output voltage is less than 0.081 V for 3 seconds or more (1 trip detection logic).
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-
Short in No. 2 engine coolant temperature sensor circuit
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No. 2 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: P00B3
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DTC for Mexico Models: Does not apply
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MONITOR DESCRIPTION
The No. 2 engine coolant temperature sensor is used to monitor the engine coolant temperature. The No. 2 engine coolant temperature sensor has a thermistor with a resistance that varies according to the temperature of the engine coolant. When the engine coolant temperature is low, the resistance in the thermistor increases. When the temperature is high, the resistance decreases. These variations in resistance are reflected in the output voltage from the sensor. The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature. If the No. 2 engine coolant temperature sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction of the No. 2 engine coolant temperature sensor circuit, illuminates the MIL and stores a DTC.
Example:
If the No. 2 engine coolant temperature sensor output voltage is less than 0.081 V for 3 seconds or more, the ECM store this DTC.
MONITOR STRATEGY
Related DTCs
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P00B3: No. 2 engine coolant temperature sensor range check (low voltage)
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Required Sensors/Components (Main)
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No. 2 engine coolant temperature sensor
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Required Sensors/Components (Related)
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-
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Frequency of Operation
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Continuous
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Duration
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3 seconds
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MIL Operation
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Immediate
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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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Both of the following conditions are met
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-
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Auxiliary battery voltage
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8 V or higher
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Power switch
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On (IG)
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TYPICAL MALFUNCTION THRESHOLDS
No. 2 engine coolant temperature sensor voltage [Engine coolant temperature]
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Less than 0.081 V [Higher than 163°C (325°F)]
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CONFIRMATION DRIVING PATTERN
HINT:
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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).
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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 and wait for at least 30 seconds.
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Turn the power switch on (IG) [A].
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Turn the Techstream on.
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Wait 3 seconds or more [B].
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Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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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: P00B111.
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Check the DTC judgment result.
Techstream Display
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Description
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NORMAL
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-
DTC judgment completed
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System normal
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ABNORMAL
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-
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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WIRING DIAGRAM
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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INSPECT NO. 2 ENGINE COOLANT TEMPERATURE SENSOR
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(a) Inspect the No. 2 engine coolant temperature sensor.
Click here
OK
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|
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2.
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CHECK HARNESS AND CONNECTOR (NO. 2 ENGINE COOLANT TEMPERATURE SENSOR - ECM)
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(a) Disconnect the No. 2 engine coolant temperature sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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C119-2 (THW2) or C147-128 (THTW) - Body ground and other terminals
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Always
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10 kΩ or higher
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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|