DESCRIPTION
The room temperature sensor is installed in the instrument panel. It detects the cabin temperature to control the air conditioning AUTO mode. The resistance of the 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 A/C amplifier applies voltage (5 V) to the room temperature sensor and reads voltage changes as the resistance of the room temperature sensor changes. This sensor also sends appropriate signals to the A/C amplifier.
DTC No. |
DTC Detection condition |
Trouble Area |
---|---|---|
B1411/11 |
Open or short in room temperature sensor circuit |
|
WIRING DIAGRAM
PROCEDURE
1. |
READ VALUE USING TECHSTREAM |
(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 / Air Conditioner / Data List.
(e) Check the value(s) by referring to the table below.
Air Conditioner
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Room Temperature Sensor |
Room temperature sensor / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual cabin temperature displayed |
- |
OK:
The display is as specified in the Normal Condition column.
Result |
Proceed to |
---|---|
NG |
A |
OK (When troubleshooting according to Problem Symptoms Table) |
B |
OK (When troubleshooting according to the DTC) |
C |
B | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
C | ![]() |
REPLACE A/C AMPLIFIER |
|
2. |
INSPECT ROOM TEMPERATURE SENSOR |
(a) Remove the room temperature sensor.
(b) Disconnect the room temperature sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D11-1 - D11-2 |
10°C (50°F) |
3.00 to 3.73 kΩ |
D11-1 - D11-2 |
15°C (59°F) |
2.45 to 2.88 kΩ |
D11-1 - D11-2 |
20°C (68°F) |
1.95 to 2.30 kΩ |
D11-1 - D11-2 |
25°C (77°F) |
1.60 to 1.80 kΩ |
D11-1 - D11-2 |
30°C (86°F) |
1.28 to 1.47 kΩ |
D11-1 - D11-2 |
35°C (95°F) |
1.00 to 1.22 kΩ |
D11-1 - D11-2 |
40°C (104°F) |
0.80 to 1.00 kΩ |
D11-1 - D11-2 |
45°C (113°F) |
0.65 to 0.85 kΩ |
D11-1 - D11-2 |
50°C (122°F) |
0.50 to 0.70 kΩ |
D11-1 - D11-2 |
55°C (131°F) |
0.44 to 0.60 kΩ |
D11-1 - D11-2 |
60°C (140°F) |
0.36 to 0.50 kΩ |
NOTICE:
HINT:
As the temperature increases, the resistance decreases (see the graph).
Text in Illustration
*1 |
Component without harness connected (Room Temperature Sensor) |
*2 |
Sensing Portion |
NG | ![]() |
REPLACE ROOM TEMPERATURE SENSOR |
|
3. |
CHECK HARNESS AND CONNECTOR (ROOM TEMPERATURE SENSOR - A/C AMPLIFIER) |
(a) Disconnect the A/C amplifier connector. |
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE A/C AMPLIFIER |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Open in One Side of CAN Branch Line
DESCRIPTION
If some ECUs and sensors are not displayed on the "CAN Bus Check" screen of the
Techstream and some ECUs and sensors repeatedly appear and disappear from the screen
when the CAN main bus wires are normal (there is no open, short, sho ...
Tongue Plate Stopper
Components
COMPONENTS
ILLUSTRATION
Replacement
REPLACEMENT
PROCEDURE
1. REMOVE TONGUE PLATE STOPPER
(a) Slide the tongue plate above the installation position of the tongue
plate stopper, and temporarily hold it with adhesive tape.
...
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the LH side and RH side.
The following procedure listed is for the LH side.
PROCEDURE
1. INSTALL FRONT LOWER BALL JOINT
(a) Install the front lower ball jo ...