Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Blower Motor does not Operate

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Gasoline Model With Automatic Air Conditioning System) / 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.

NG

GO TO OTHER DIAGNOSIS PROCEDURE (Blower Motor Circuit)

OK

2.

READ VALUE USING GTS

(a) Read the Data List according to the display on the GTS.

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.

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

GO TO COOLING SYSTEM

    READ NEXT:

     Weak Blower Output

    DESCRIPTION If the airflow from the front registers is weak regardless of the blower speed setting displayed on the air conditioning control assembly, the following factors may be the cause. Sym

     Recirculated/Fresh Air Modes Switch without User Input

    DESCRIPTION If recirculation/fresh mode changes unintentionally and without permission, the following causes are possible. Symptom Factor Recirculation/fresh mode changes without

     Recirculated/Fresh Air Modes do not Switch

    DESCRIPTION If the air inlet mode cannot be changed between recirculation/fresh or exhaust gas odors can be smelled even though recirculation mode is selected, the following factors may be the cause.

    SEE MORE:

     Diagnosis System

    DIAGNOSIS SYSTEM DESCRIPTION (a) When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the GTS to the vehicle and reading various data output from the clearance warning ECU assembly. The clearance warning ECU assembl

     Power Source Mode does not Change to ON (IG and ACC)

    DESCRIPTION When the ignition switch cannot be turned to ACC or ON, interior verification may be abnormal or there may be a malfunction in the ACC relay or IG relay circuit. If interior verification cannot be performed, the certification ECU (smart key ECU assembly) may be malfunctioning or communic

    © 2020-2024 Copyright www.tcorollacross.com