DTC B1411/11: Room Temperature Sensor Circuit: Procedure

1. Remove the room temperature sensor (for front), refer to REMOVAL .
   Fig 1: Identifying Room Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D26-1 (+) - D26-2 (-)	10°C (50°F)	3.00 to 3.73 kΩ
   D26-1 (+) - D26-2 (-)	15°C (59°F)	2.45 to 2.88 kΩ
   D26-1 (+) - D26-2 (-)	20°C (68°F)	1.95 to 2.30 kΩ
   D26-1 (+) - D26-2 (-)	25°C (77°F)	1.60 to 1.80 kΩ
   D26-1 (+) - D26-2 (-)	30°C (86°F)	1.28 to 1.47 kΩ
   D26-1 (+) - D26-2 (-)	35°C (95°F)	1.00 to 1.22 kΩ
   D26-1 (+) - D26-2 (-)	40°C (104°F)	0.80 to 1.00 kΩ
   D26-1 (+) - D26-2 (-)	45°C (113°F)	0.65 to 0.85 kΩ
   D26-1 (+) - D26-2 (-)	50°C (122°F)	0.50 to 0.70 kΩ
   D26-1 (+) - D26-2 (-)	55°C (131°F)	0.44 to 0.60 kΩ
   D26-1 (+) - D26-2 (-)	60°C (140°F)	0.36 to 0.50 kΩ

   NOTE:

   • Touching the sensor even slightly may change the resistance value. Be sure to hold the connector of the sensor.
   • When measuring, the sensor temperature must be the same as the ambient temperature.

   HINT: 

   As the temperature increases, the resistance decreases (see the graph).

NG → See step   4 

OK: Go to next step 

1. Disconnect the D26 sensor connector.
   Fig 2: Identifying Harness And Connector (Room Temperature Sensor-Air Conditioning Amplifier)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the D37 amplifier connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D26-1 (+) - D37-29 (TR)	Always	Below 1 Ω
   D26-2 (-) - D37-35 (SG-4)	Always	Below 1 Ω
   D26-1 (+) - Body ground	Always	1 MΩ or higher
   D26-2 (-) - Body ground	Always	1 MΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3