| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VK1O |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Air Conditioning Control Panel Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Air Conditioning Control Panel Circuit |
DESCRIPTION
This circuit consists of the air conditioning control assembly and the air conditioning amplifier. When the air conditioning control assembly is operated, signals are transmitted to the air conditioning amplifier through the LIN communication system.
If the LIN communication system malfunctions, the air conditioning amplifier does not operate even if the air conditioning control assembly is operated.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - BODY GROUND) |
(a) Disconnect the air conditioning control assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D69-5 (GND) - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to Air Conditioning Control Assembly) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - BATTERY) |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
Text in Illustration
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR CONDITIONING CONTROL ASSEMBLY) |
(a) Disconnect the air conditioning amplifier connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D75-37 (LIN1) - D69-8 (LIN1) |
Always |
Below 1 Ω |
|
D75-37 (LIN1) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT AIR CONDITIONING CONTROL ASSEMBLY |
(a) Replace the air conditioning control assembly (See page
![2016 - 2020 MY Sienna [12/2015 - ]; HEATING / AIR CONDITIONING: AIR CONDITIONING PANEL: REMOVAL](/t3Portal/stylegraphics/info.gif)
).
HINT:
Since the air conditioning control assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning control assembly with a new or a known good one and check that the condition returns to normal.
(b) Operate the air conditioning control assembly to check that it functions properly.
Result
|
Result |
Proceed to |
|---|---|
|
Air conditioning control assembly malfunctions |
A |
|
Air conditioning control assembly functions properly |
B |
| A |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
| B |
|
|
|