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 |
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK TIRE PRESSURE WARNING ECU
HINT:
Inspect the connectors from the back side while the connectors are connected.
(a) Disconnect the L14 tire pressure warning antenna and receiver connector.
(b) Measure the voltage according to the ...
Air conditioning filter
The air conditioning filter must be changed regularly to maintain air conditioning
efficiency.
- Removal method
Vehicles with smart key system:
Turn the “ENGINE START STOP” switch off.
Vehicles without smart key system:
Turn the engine switch ...
Driver Side Door Entry Lock and Unlock Functions do not Operate
DESCRIPTION
When the entry lock and unlock functions do not operate only for the driver door,
an error in output request codes from the driver door or malfunction in the front
door outside handle assembly is suspected. If the entry functions for the other ...