Toyota Yaris: 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
-
Open in air conditioner pressure sensor power source circuit
-
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.
| NG |
| GO TO OTHER DIAGNOSIS PROCEDURE (A/C Switch Indicator does not Turn On) |
|
OK |
| |
| 2. | 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 | - |
Body Electrical > Air Conditioner > Active Test
| Tester Display |
| Front Left Air Mix Damper Control Servo Motor |
Body Electrical > Air Conditioner > Active Test
| Tester Display |
| Front Right Air Mix Damper Control Servo Motor |
OK:
Each 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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(Air outlet display changes)
No...
Other information:
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Categories
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is
dangerous.
The person in the luggage compartment/trunk could be seriously injured or
killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
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