- Rear room temperature sensor
- Harness or connector between rear air conditioning room temperature sensor and air conditioning amplifier
- Air conditioning amplifier
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VK1N |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1419/19; Rear Room Temperature Sensor Circuit; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
DTC |
B1419/19 |
Rear Room Temperature Sensor Circuit |
DESCRIPTION
This sensor detects the rear cabin temperature that is used as the basis for temperature control and sends a signal to the air conditioning amplifier.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1419/19 |
Rear room temperature sensor circuit (Open or short) |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(a) Connect 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) Check the value(s) by referring to the table below.
Air Conditioner
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Room Temp Sensor (Rear) |
Rear room temperature sensor / Min.: -6.5°C (20.3°F) Max.: 57.25°C (135.05°F) |
Actual cabin temperature is displayed |
Open in the circuit: -6.5°C (20.3°F) Short in the circuit: 57.25°C (135.05°F) |
OK:
The display is as specified in the normal condition column.
Result
|
Result |
Proceed to |
|---|---|
|
NG |
A |
|
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE) |
B |
|
OK (When troubleshooting according to the DTC) |
C |
| B |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| C |
|
|
|
2. |
INSPECT REAR ROOM TEMPERATURE SENSOR |
(a) Remove the rear room temperature sensor.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K11-1 - K11-2 |
10°C (50°F) |
3.00 to 3.73 kΩ |
|
15°C (59°F) |
2.45 to 2.88 kΩ |
|
|
20°C (68°F) |
1.95 to 2.30 kΩ |
|
|
25°C (77°F) |
1.60 to 1.80 kΩ |
|
|
30°C (86°F) |
1.28 to 1.47 kΩ |
|
|
35°C (95°F) |
1.00 to 1.22 kΩ |
|
|
40°C (104°F) |
0.80 to 1.00 kΩ |
|
|
45°C (113°F) |
0.65 to 0.85 kΩ |
|
|
50°C (122°F) |
0.50 to 0.70 kΩ |
|
|
55°C (131°F) |
0.44 to 0.60 kΩ |
|
|
60°C (140°F) |
0.36 to 0.50 kΩ |
Text in Illustration
|
*a |
Component without harness connected (to Rear Room Temperature Sensor) |
NOTICE:
- Hold the sensor only by its connector. Touching the sensor may change the resistance value.
- When measuring, the sensor temperature must be the same as the rear cabin temperature.
HINT:
As the temperature increases, the resistance decreases (see the graph).
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (REAR ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER) |
(a) Disconnect the connector from the air conditioning amplifier.
(b) Disconnect the connector from the rear room temperature sensor.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D74-17 (TR) - K11-1 |
Always |
Below 1 Ω |
|
D74-7 (SG-6) - K11-2 |
Always |
Below 1 Ω |
|
D74-17 (TR) - Body ground |
Always |
10 kΩ or higher |
|
D74-7 (SG-6) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|