HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): No Cooling at All; 2023 - 2025 MY Corolla Corolla HV [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000026Z4G
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): No Cooling at All; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ]

No Cooling at All

DESCRIPTION

If cool air is not discharged (air is discharged), the following malfunctions are possible.

Malfunction Status	Factor
Cool air is not discharged (air is discharged)	Compressor with motor assembly malfunction Refrigerant pressure malfunction Lack of refrigerant gas Dirty cooler condenser Cooling fan system malfunction Air mix damper and link operation (jamming) Evaporator temperature sensor (determined as cold, but conflicts with actual temperature) Warm air flow

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.

2.	PERFORM ACTIVE TEST USING GTS

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

Tester Display

Measurement Item

Control Range

Diagnostic Note

Front Air Mix Damper Control Servo Motor

This test activates the front air mix damper control servo motor.

(No. 1 air conditioning radiator damper servo sub-assembly (air mix))

128: Min

384: Max

Operate with the ignition switch ON.

Active Test Display
Front Air Mix Damper Control Servo Motor

Data List Display
Front Air Mix Damper Control Servo Motor Actual Pulse

OK:

Damper servo motor is operated.

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

for HFC-134a(R134a): Click here

for HFO-1234yf(R1234yf): Click here