HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Gasoline Model) Cooling is Poor
DESCRIPTION
If the cooling air is poor (cooling air is discharged), the following causes are possible.
| Malfunction Status | Factor |
|---|---|
·
Cooling is poor. ·
Takes time to cool down. |
·
ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected) ·
Compressor with motor assembly malfunction ·
Excessive refrigerant ·
Lack of refrigerant gas ·
Dirty cooler condenser ·
Cooling fan system malfunction ·
Air mix damper and link operation (jamming) ·
Automatic light control sensor (for Automatic Air Conditioning System) ·
Warm air flow |
WIRING DIAGRAM
PROCEDURE
Confirm setup of the ECO drive mode and turn it off if it is on.
- HINT:
- ·
When ECO drive mode is on, the air conditioning amplifier assembly ensures a minimum level of air conditioning control based on certain conditions, thereby contributing to improved fuel efficiency. Accordingly, explain to customers that the air volume will be weaker in these situations.
Control Control Summary Airflow Control Automatically switches the air inlet port to the internal air circulation mode when the outside air temperature is equal to or higher than a predetermined temperature and reduces the power consumption. Air Inlet Control Sets the blower level in AUTO mode lower than normal, and suppresses the power consumption.
·If integration control and panel assembly (ECO switch) is malfunctioning, perform diagnosis on the ECO switch circuit.
- Result:
Proceed to NEXT
NEXT
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 |
- NOTICE:
-
When the GTS is operated without the check conditions satisfied, "Refrigerant incorrect" is displayed. Select "Yes" to return to the previous screen.
- 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.
·*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.
- Body Electrical > Air Conditioner > Utility
-
Tester Display Refrigerant Gas Volume Check - 50005 450 4578
- Result:
Result Amount of Refrigerant Refrigerant shortage Insufficient or leakage Refrigerant correct Correct
- OK:
"Refrigerant correct" is displayed on GTS.
- Result:
Proceed to OK NG
OK
NG
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 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)
- Body Electrical > Air Conditioner > Active Test
-
Tester Display Front Left Air Mix Damper Control Servo Motor - 50004 450 26
- Body Electrical > Air Conditioner > Active Test
-
Tester Display Front Right Air Mix Damper Control Servo Motor - 50004 450 28
- Body Electrical > Air Conditioner > Active Test
-
Tester Display Front Air Mix Damper Control Servo Motor - 50004 450 46
- OK:
Damper servo motor is operated.
- Result:
Result Proceed to OK (for Automatic Air Conditioning System) A OK (for Manual Air Conditioning System) B NG C
A
B
C
Disconnect the H1 automatic light control sensor connector.
Disconnect the G169 main body ECU (multiplex network body ECU) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition H1-1 (CLTB) - G169-8 (CLTB) Always Below 1 Ω H1-2 (CLTE) - G169-21 (CLTE) Always Below 1 Ω H1-4 (CLTS) - G169-20 (CLTS) Always Below 1 Ω H1-1 (CLTB) or G169-8 (CLTB) - Other terminals and body ground Always 10 kΩ or higher H1-2 (CLTE) or G169-21 (CLTE) - Other terminals and body ground Always 10 kΩ or higher H1-4 (CLTS) or G169-20 (CLTS) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG