Toyota Yaris: Air Conditioning System / Front Window Fogging

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System / Front Window Fogging

DESCRIPTION

If the windshield frequently fogs up even though the air conditioning system is operating, the following factors may be the cause.

Symptom	Factor
Windshield frequently fogs up	Compressor malfunction Refrigerant volume (low) Cooler expansion valve (opened excessively) No. 1 air conditioning radiator damper servo sub-assembly malfunction Mechanical locking of damper and damper link

PROCEDURE

1.	PERFORM REFRIGERANT SHORTAGE CHECK

(a) Check that the following conditions are met and perform the refrigerant shortage check according to the display on the GTS.

Measurement Condition:

Item	Condition
A/C switch	On
Ambient temperature*1	0 to 49°C (32 to 120°F)
Blower speed	HI

*1: If the ambient temperature is not within the range shown, do not perform this check.

Body Electrical > Air Conditioner > Utility

Tester Display
Refrigerant Gas Volume Check

Result	Amount of Refrigerant
Refrigerant correct	Correct
Refrigerant shortage	Insufficient

OK:

"Refrigerant correct" is displayed on the GTS.

CHARGE SYSTEM WITH REFRIGERANT

2.	CHECK OPERATION

(a) Press the front defroster switch on the air conditioning control assembly and check that the air outlet mode changes to DEF mode.

OK:

The air outlet mode changes to DEF mode.

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

GO TO DTC B14037F

Operation not Accepted Even If Air Conditioning Switch is Operated

DESCRIPTION If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause. Symptom Factor Air conditioning system cannot be operated using air conditioning control assembly (With the exception of the switch indicators, no inputs are reflected when other switches operated) LIN communication malfunction between air conditioning amplifier assembly and air conditioning control assembly Short to +B or ground in air conditioning amplifier assembly circuit Air conditioning amplifier assembly malfunction Air conditioning control assembly malfunction Harness or connector WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure...

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...

Other information:

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Engine/Power Switch Signal Compare Failure (B227862)

DESCRIPTION This DTC is stored when the SSW1 contact signal, SSW2 contact signal and SSW3 contact signal, which are detected when the engine switch is operated, do not match. DTC No. Detection Item DTC Detection Condition Trouble Area Note B227862 Engine/Power Switch Signal Compare Failure When the engine switch is operated, the SSW1 contact signal, SSW2 contact signal and SSW3 contact signal do not match...

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE Stop and Start System Symptom Suspected Area Link Stop and start system does not operate Refer to "Stop and Start System does not Operate" Refer to "Stop and Start System does not Operate (Battery Condition)" Restarting after a short period of time from an idling stop Refer to "Restarting after a Short Period of Time from an Idling Stop" After engine stops due to stop and start system, engine does not restart Refer to "After Engine Stops due to Stop and Start System, Engine does not Restart" Failure to restart from IG-ON engine stall Refer to "Failure to Restart from IG-ON Engine Stall" Stop and start cancel indicator does not operate Combination meter assembly Indicator circuit (CAN communication system) Engine stop and start ECU Stop and start indicator does not operate Combination meter assembly Indicator circuit (CAN communication system) Engine stop and start ECU Stop and start control cannot be canceled ECAN terminal voltage Stop and start cancel switch circuit Multi-information display screen does not change after pressing steering pad switch assembly...