| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VK18 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Back-up Power Source Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Back-up Power Source Circuit |
DESCRIPTION
This is the back-up power source circuit for the air conditioning amplifier. Power is supplied even when the ignition switch is turned off, and is used for functions such as the diagnostic trouble code memory.
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 AMPLIFIER - BATTERY) |
|
(a) Disconnect the air conditioning amplifier connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D75-21 (B) - Body ground |
Always |
11 to 14 V |
Text in Illustration
|
*a |
Rear view of wire harness connector (to Air Conditioning Amplifier) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND) |
|
(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 |
|---|---|---|
|
D75-14 (GND) - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Rear view of wire harness connector (to Air Conditioning Amplifier) |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|