Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Blower Motor does not Operate

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System(for Gasoline Model) / Blower Motor does not Operate

DESCRIPTION

If air does not flow from the front registers after the blower switch on the air conditioning control panel (radio and display receiver assembly) is operated, the following factors may be the cause.

Symptom	Factor
No air flows from the registers	Air conditioning amplifier assembly malfunction Blower motor with fan sub-assembly malfunction Warm-up control Engine coolant temperature sensor malfunction Harness or connector

PROCEDURE

1.	CHECK AIR CONDITIONING SYSTEM (MANUAL MODE)

(a) Turn off the AUTO switch, operate the blower switch and check that the blower motor with fan sub-assembly can be operated manually.

OK:

The blower motor with fan sub-assembly operates normally.

GO TO OTHER DIAGNOSIS PROCEDURE (Blower Motor Circuit)

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Powertrain / Engine / Data List.

(e) Read the Data List according to the display on the Techstream.

Powertrain > Engine > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Coolant Temperature

Engine coolant temperature

Min.: -40°C (-40°F), Max.: 140°C (284°F)

75 to 100°C (167 to 212°F): After warming up

This is the engine coolant temperature.

HINT:

After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).
After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal.
If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.
Check if the engine overheats if the value indicated is higher than 135°C (275°F).

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

OK:

After warming up the engine, the temperature value displayed is within the range specified in the normal condition column.

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

GO TO COOLING SYSTEM

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Blower Motor does not Operate

Blower Motor Circuit

Cooling is Poor

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual