Toyota Prius 2010 Repair Manual page 78
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Also See for Prius 2010:
- Owner's manual (635 pages) ,
- User manual (610 pages) ,
- Repair manual (452 pages)
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DTC
B1412/12 Ambient Temperature Sensor Circuit
DESCRIPTION
The ambient temperature sensor is installed in front of the condenser. It detects the ambient temperature to
control air conditioning AUTO mode. This sensor is connected to the A/C amplifier and detects fluctuations in
the ambient temperature. This data is used for controlling the cabin temperature. The sensor sends a signal to
the A/C amplifier. The resistance of the ambient temperature sensor changes in accordance with the ambient
temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance
decreases.
The A/C amplifier applies voltage (5 V) to the ambient temperature sensor and reads voltage changes as the
resistance of the ambient temperature sensor changes.
DTC No.
DTC Detection Condition
Open or short in ambient temperature
B1412/12
sensor circuit
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1.
READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
2010 Toyota Prius
Trouble Area
Ambient temperature sensor
Harness or connector between ambient temperature
sensor and A/C amplifier
A/C amplifier
Repair Manual
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