HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): Blower Motor does not Operate; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001HBYG
Model Year Start: 2020	Model: GR Corolla	Prod Date Range: [01/2019 - 09/2022]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): Blower Motor does not Operate; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]

Blower Motor does not Operate

DESCRIPTION

If air does not flow from the front registers after the blower switch on the air conditioning control assembly is operated, the following factors may be the cause.

Symptom	Factor
Blower motor does not operate at all (Air does not blow from 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 ignition switch to ON.

(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

for M20A-FKS: Click here

for 2ZR-FAE: Click here