If warm air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.
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 pulley assembly malfunction ·
Refrigerant pressure malfunction ·
Lack of refrigerant gas ·
Dirty cooler condenser ·
Cooling fan system malfunction ·
Air mix damper and link operation (jamming) ·
No. 1 cooler thermistor (determined as cold, conflicting with actual temperature) ·
Warm air flow |
Operate each switch on the air conditioning control assembly to check that the switch indicators are illuminated normally.
Switch indicators are illuminated normally.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Prepare the vehicle according to the table below.
| Item | Condition |
|---|---|
| Vehicle Condition | Engine running |
| A/C Switch | On |
| Ambient Temperature*1 | 0 to 49°C (32 to 120°F) |
| Air Conditioning Air Inlet Temperature*2 | 25 to 35°C (77 to 95°F) |
| Set Temperature | MAX COLD |
| Recirculation/fresh Control Switch | Recirculation |
| Air Vent Damper Position | FACE |
| Blower Speed | HI |
When the GTS is operated without the check conditions satisfied, "Refrigerant incorrect" is displayed. Select "Yes" to return to the previous screen.
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.
*1: This inspection can be judged correctly only if the ambient temperature is within a range of 0 to 49°C (32 to 120°F). Therefore, postpone the test if the temperature is low.
*2: This inspection can be judged correctly only if the air inlet temperature is within a range of 25 to 35°C (77 to 95°F). Therefore, postpone the test if the temperature is out of range.
According to the GTS display, perform refrigerant gas volume check.
| Tester Display |
|---|
| Refrigerant Gas Volume Check |
| Result | Amount of Refrigerant |
|---|---|
| Refrigerant shortage | Insufficient or leakage |
| Refrigerant correct | Correct |
"Refrigerant correct" is displayed on GTS.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Perform the Active Test according to the display on the GTS.
| 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 operation | 128 to 384 | Operates between 165 to 257 pulses
(for Automatic Air Conditioning System) |
| Front Right Air Mix Damper Control Servo Motor | No. 1 air conditioning radiator damper servo sub-assembly operation | 128 to 384 | Operates between 255 to 347 pulses
(for Automatic Air Conditioning System) |
| Front Air Mix Damper Control Servo Motor | No. 1 air conditioning radiator damper servo sub-assembly operation | 128 to 384 | Operates between 165 to 257 pulses
(for Manual Air Conditioning System) |
| Tester Display |
|---|
| Front Left Air Mix Damper Control Servo Motor |
| Tester Display |
|---|
| Front Right Air Mix Damper Control Servo Motor |
| Tester Display |
|---|
| Front Air Mix Damper Control Servo Motor |
Each damper servo motor operates.
| Proceed to |
|---|
| OK |
| NG |
OK
NG