Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: No Cool Air Comes Out

Toyota Corolla Cross (2022-2026) Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Gasoline Model With Automatic Air Conditioning System) / No Cool Air Comes Out

DESCRIPTION

If warm air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.

Symptom

Factor

No cool air comes out

  • (Blower control is normal)
  • Compressor with pulley assembly malfunction
  • Refrigerant pressure is extremely high or low
  • Refrigerant volume (low)
  • Clogged cooler condenser assembly fins
  • Cooling fan system malfunction
  • Mechanical locking of damper and damper link
  • No. 1 cooler thermistor malfunction
  • High inlet air temperature

PROCEDURE

1.

CHECK SWITCH INDICATOR

(a) Operate each switch on the air conditioning control assembly and check that the switch indicators operate normally.

OK:

All switch indicators operate normally.

 

Proceed to

OK (for Dual Type)

A

OK (for Single Type)

B

NG

C
B

GO TO STEP 3

C

GO TO OTHER DIAGNOSIS PROCEDURE (Operation not Accepted Even If Air Conditioning Switch is Operated)

A

2.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Air Conditioner > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Front Left Air Mix Damper Control Servo Motor

No. 1 air conditioning radiator damper servo sub-assembly pulse

Min.: 128

Max.: 384

Operates between 165 to 257 pulses

Front Right Air Mix Damper Control Servo Motor

No. 1 air conditioning radiator damper servo sub-assembly pulse

Min.: 128

Max.: 384

Operates between 255 to 347 pulses
Body Electrical > Air Conditioner > Active Test

Active Test Display

Front Left Air Mix Damper Control Servo Motor

Data List Display

Front Left Air Mix Damper Control Servo Motor Actual Pulse
Body Electrical > Air Conditioner > Active Test

Active Test Display

Front Right Air Mix Damper Control Servo Motor

Data List Display

Front Right Air Mix Damper Control Servo Motor Actual Pulse

OK:

The No. 1 air conditioning radiator damper servo motor operates.

OK

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

NG

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR

3.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Air Conditioner > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Front Air Mix Damper Control Servo Motor

No. 1 air conditioning radiator damper servo sub-assembly pulse

Min.: 128

Max.: 384

Operates between 255 to 347 pulses
Body Electrical > Air Conditioner > Active Test

Active Test Display

Front Air Mix Damper Control Servo Motor

Data List Display

Front Air Mix Damper Control Servo Motor Actual Pulse

OK:

The No. 1 air conditioning radiator damper servo motor operates.

OK

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

NG

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR

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