Toyota Yaris: Air Conditioning System / No Warm Air Comes Out
DESCRIPTION
If cool air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.
| Symptom | Factor |
|---|---|
|
|
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Check for DTCs.
Powertrain > Engine > Trouble CodesOK:
SFI system DTCs are not output.
| NG |
 | GO TO SFI SYSTEM |
|
| 2. | READ VALUE USING GTS (COOLANT TEMPERATURE) |
(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:
|
| Tester Display |
|---|
| Coolant Temperature |
OK:
After warming up the engine, the temperature value displayed is within the range specified in the normal condition column.
| NG |
 | GO TO COOLING SYSTEM |
|
| 3. | PERFORM ACTIVE TEST USING GTS (FRONT LEFT AIR MIX DAMPER CONTROL SERVO MOTOR, FRONT RIGHT AIR MIX DAMPER CONTROL SERVO MOTOR) |
(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 | - |
| Front Right Air Mix Damper Control Servo Motor | No. 1 air conditioning radiator damper servo sub-assembly pulse | Min.: 128 Max.: 384 | - |
| Tester Display |
|---|
| Front Left Air Mix Damper Control Servo Motor |
| Tester Display |
|---|
| Front Right Air Mix Damper Control Servo Motor |
OK:
Each damper servo motor operates.
| OK |
 | REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY |
| NG |
 | GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR |
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DESCRIPTION If the temperature of the air that blows from the left and right front registers differs, even though the same temperature is set for both sides, the following factors may be the cause...
Other information:
Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the lane tracing assist system. *: Use the GTS. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, confirm that the problem symptoms have been accurately identified...
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DESCRIPTION The air conditioning harness assembly connects the air conditioning amplifier assembly and the No. 1 air conditioning radiator damper servo sub-assembly. The air conditioning amplifier assembly supplies power and sends operation instructions to No...
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When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it
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