| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001FPE4 |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1411; Room Temperature Sensor Circuit; 2019 - 2024 MY RAV4 [11/2018 - ] | ||
|
DTC |
B1411 |
Room Temperature Sensor Circuit |
DESCRIPTION
The cooler thermistor (room temperature sensor) is installed in the instrument panel to detect the cabin temperature, which is used to control the air conditioning system. The resistance of the cooler thermistor (room temperature sensor) changes in accordance with the cabin temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The air conditioning amplifier assembly applies voltage (5 V) to the cooler thermistor (room temperature sensor) and reads voltage changes due to changes in the resistance of the cooler thermistor (room temperature sensor).
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
|---|---|---|---|---|
|
B1411 |
Room Temperature Sensor Circuit |
|
|
Memorized |
HINT:
If the cabin temperature is approximately -18.6°C (-1.48°F) or lower, DTC B1411 may be output even though the system is normal.
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (ROOM TEMPERATURE SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Air Conditioner > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Room Temperature Sensor |
Cooler thermistor (room temperature sensor) |
Min.: -6.50°C (20.30°F) Max.: 57.25°C (135.05°F) |
Actual cabin temperature displayed |
Cooler thermistor (room temperature sensor) system malfunction
|
Body Electrical > Air Conditioner > Data List
|
Tester Display |
|---|
|
Room Temperature Sensor |
OK:
The display is as specified in the normal condition column.
| OK |
|
|
|
2. |
INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR) |
(a) Remove the cooler thermistor (room temperature sensor).
Click here
![2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; HEATING / AIR CONDITIONING: ROOM TEMPERATURE SENSOR: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Inspect the cooler thermistor (room temperature sensor).
Click here
| NG |
|
REPLACE COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)) |
(a) Disconnect the G47 air conditioning amplifier assembly connector.
(b) Disconnect the G60 cooler thermistor (room temperature sensor) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G47-5 (TR) - G60-1 |
Always |
Below 1 Ω |
|
G47-3 (SG-1) - G60-2 |
Always |
Below 1 Ω |
|
G47-5 (TR) or G60-1 - Other terminals and body ground |
Always |
10 kΩ or higher |
|
G47-3 (SG-1) or G60-2 - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|