- Air conditioning amplifier assembly malfunction
- ECO switch assembly (electric parking brake switch assembly) malfunction
- Harness or connector
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM1000000019XOA |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): ECO Switch Circuit; 2019 - 2022 MY Avalon [04/2018 - ] | ||
|
ECO Switch Circuit |
DESCRIPTION
When the ECO switch assembly (electric parking brake switch assembly) is operated, the air conditioning amplifier assembly receives a signal and enables or disables ECO mode control of the air conditioning system.
|
Symptom |
Factor |
|---|---|
|
When ECO switch assembly (electric parking brake switch assembly) is operated, blower speed does not change |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Air Conditioner > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
ECO Switch |
ECO switch assembly (electric parking brake switch assembly) |
OFF or ON |
OFF: ECO switch assembly (electric parking brake switch assembly) not pushed ON: ECO switch assembly (electric parking brake switch assembly) pushed and held |
ECO switch assembly (electric parking brake switch assembly) circuit malfunction |
Body Electrical > Air Conditioner > Data List
|
Tester Display |
|---|
|
ECO Switch |
OK:
ECO switch assembly (electric parking brake switch assembly) condition displayed on the Techstream changes with the actual switch operation.
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
|
|
|
2. |
INSPECT ECO SWITCH ASSEMBLY (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) |
(a) Remove the ECO switch assembly (electric parking brake switch assembly).
Click here
![2019 - 2022 MY Avalon Avalon HV [04/2018 - ]; HEATING / AIR CONDITIONING: ECO SWITCH: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Inspect the ECO switch assembly (electric parking brake switch assembly).
Click here
| NG |
|
REPLACE ECO SWITCH ASSEMBLY (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECO SWITCH ASSEMBLY (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the G36 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G24-11 (ECU) - G36-20 (ECOS) |
Always |
Below 1 Ω |
|
G24-16 (GND1) - Body ground |
Always |
Below 1 Ω |
|
G24-11 (ECU) or G36-20 (ECOS) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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