DESCRIPTION Refer to DTC P011511. Click here
HINT: When DTC P011515 is stored, the ECM enters fail-safe mode. During fail-safe mode, the engine coolant temperature is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected.
HINT: When this DTC is output, check the engine coolant temperature in the Data List. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
If the Data List values is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems. MONITOR DESCRIPTION The engine coolant temperature sensor is used to monitor the engine coolant temperature. The engine coolant temperature sensor has a thermistor with a resistance that varies according to the temperature of the engine coolant. When the coolant temperature is low, the resistance in the thermistor increases. When the temperature is high, the resistance drops. 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 engine coolant temperature sensor output voltage deviates from the normal operating range, the ECM interprets this as a fault in the engine coolant temperature sensor circuit and stores this DTC. Example: If the engine coolant temperature sensor output voltage is higher than 4.91 V for 0.5 seconds or more, the ECM store this DTC. MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
CONFIRMATION DRIVING PATTERN HINT:
WIRING DIAGRAM Refer to DTC P011511. Click here
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
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(a) Disconnect the engine coolant temperature sensor connector. (b) Connect terminals 1 (E2) and 2 (THW) of the engine coolant temperature sensor connector on the wire harness side. (c) Connect the Techstream to the DLC3. (d) Turn the engine switch on (IG). (e) Turn the Techstream on. (f) Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature. Powertrain > Engine > Data List
(g) According to the display on the Techstream, read the Data List. OK:
HINT: Perform "Inspection After Repair" after replacing the engine coolant temperature sensor. Click here
(a) Disconnect the 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:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Electric Parking Brake System(for Hv Model): Engine Switch/Power Switch Malfunction (C13A2)
DESCRIPTION When the power switch is turned on (IG), power is supplied to the parking brake ECU (brake actuator assembly). This DTC is stored if IG power source voltage is not supplied to the parking brake ECU (brake actuator assembly) when communication with other ECUs is established. DTC No. Detec ...