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 value is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems. Click here
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 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 engine coolant temperature sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the engine coolant temperature sensor circuit, illuminates the MIL and stores a DTC. Example: If the engine coolant temperature sensor output voltage is higher than 4.91 V for 0.5 seconds or more, the ECM will illuminate the MIL and 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 NOTICE:
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 and 2 of the engine coolant temperature sensor connector on the wire harness side. (c) Connect the Techstream to the DLC3. (d) Turn the power 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 Service & Repair Manual > Lane Departure Alert System (w/ Steering Control)(for Hv Model): Front Radar Sensor (C1A10)
DESCRIPTION The forward recognition camera uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle. When the forward recognition camera receives information that there is an internal malfunction in the millimeter wave radar sensor assembly, DTC C1A10 is stored. DTC ...