Toyota Yaris: Air Conditioning System / Utility
UTILITY
REFRIGERANT SHORTAGE CHECK USING GTS
(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 |
HINT:
-
Refer to the GTS operator's manual for further details.
-
A message indicating a refrigerant shortage is displayed on the GTS and the air conditioning system turns off if the amount of refrigerant in the system is insufficient.
-
DTCs are not stored when performing the refrigerant shortage check using the GTS.
Result:
Result | Amount of Refrigerant | Corrective Action |
Refrigerant shortage | Insufficient | -
Check for refrigerant leaks using a halogen leak detector, and repair if necessary.
-
Evacuate the air conditioning system and charge it with the appropriate volume of new or purified refrigerant.
|
Refrigerant correct | Correct | - |
REFRIGERANT PRESSURE HISTORY CLEAR
(a) Press the OFF switch.
(b) Perform the refrigerant pressure history clear according to the display on the GTS.
Body Electrical > Air Conditioner > Utility
Tester Display |
Refrigerant Pressure History Clear |
A/C OPERATION LIMIT HISTORY COUNT CLEAR
(a) Press the OFF switch.
(b) Perform the A/C operation limit history count clear according to the display on the GTS.
Body Electrical > Air Conditioner > Utility
Tester Display |
A/C Operation Limit History Count Clear |
INITIALIZATION SERVO MOTOR INITIALIZATION (a) Press the OFF switch. (b) According to the GTS display, perform servo motor initialization. Body Electrical > Air Conditioner > Utility Tester Display Servomotor Initialization HINT: When initialization is started, the AUTO switch indicator will illuminate and then will turn off when initialization has completed...
PROBLEM SYMPTOMS TABLE NOTICE:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table...
Other information:
REMOVAL PROCEDURE 1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM Click here
2. REMOVE AIR CONDITIONER PRESSURE SENSOR (a) Disconnect the connector.
(b) Using a 27 mm deep socket wrench, remove the air conditioner pressure sensor as shown in the illustration...
INSPECTION PROCEDURE 1. INSPECT STEERING WHEEL SWITCH HOUSING (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below.
*a Component without harness connected (Steering Wheel Switch Housing) - - Standard Resistance: Light Switch Circuit Tester Connection Condition Specified Condition z6-3 (T) - z4-3 (T) Always Below 1 Ω z6-12 (H) - z4-4 (H) Always Below 1 Ω z6-7 (A) - z4-5 (A) Always Below 1 Ω z6-16 (HU) - z4-6 (HU) Always Below 1 Ω z6-11 (HF) - z4-7 (HF) Always Below 1 Ω z6-8 (TR) - z4-8 (TR) Always Below 1 Ω z6-14 (TL) - z4-9 (TL) Always Below 1 Ω z6-6 (CR) - z4-10 (CR) Always Below 1 Ω z6-13 (BFG) - z4-11 (BFG) Always Below 1 Ω z6-4 (B) - z4-12 (B) Always Below 1 Ω z6-5 (EL) - z4-13 (EL) Always Below 1 Ω Wiper Switch Circuit Tester Connection Condition Specified Condition z5-10 (W_OFF) - z4-24 (W_OFF) Always Below 1 Ω z5-13 (+S) - z4-25 (+S) Always Below 1 Ω z5-11 (+1) - z4-26 (+1) Always Below 1 Ω z5-12 (+2) - z4-27 (+2) Always Below 1 Ω z5-14 (MIST) - z4-28 (MIST) Always Below 1 Ω z5-15 (WF) - z4-31 (WF) Always Below 1 Ω z5-5 (E) - z4-33 (E) Always Below 1 Ω z5-4 (VR) - z4-34 (VR) Always Below 1 Ω If the result is not as specified, replace the steering wheel switch housing...