- Engine running
- Blower switch: LO
- A/C switch: On
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM1000000019XO9 |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - 08/2020] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1451; Compressor Solenoid Circuit; 2019 - 2020 MY Avalon [04/2018 - 08/2020] | ||
|
DTC |
B1451 |
Compressor Solenoid Circuit |
DESCRIPTION
The cooler compressor assembly receives refrigerant compression demand signals from the air conditioning amplifier assembly.
Based on this signal, the cooler compressor assembly changes the amount of compressor output.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
|---|---|---|---|---|
|
B1451 |
Compressor Solenoid Circuit |
Open or short in compressor solenoid circuit |
|
- |
WIRING DIAGRAM
PROCEDURE
|
1. |
INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
*a |
Front view of wire harness connector (to Cooler Compressor Assembly) |
(a) Disconnect the C59 cooler compressor assembly connector.
(b) Connect an oscilloscope to terminal C59-2 (SOL+) and body ground and check the waveform.
|
Item |
Content |
|---|---|
|
Tool Setting |
5 V/DIV., 500 μs./DIV. |
|
Condition |
|
OK:
Waveform is similar to that shown in the illustration.
| OK |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the G35 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 |
|---|---|---|
|
C59-2 (SOL+) - G35-3 (SOL+) |
Always |
Below 1 Ω |
|
C59-2 (SOL+) or G35-3 (SOL+) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|