RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0598792 AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE))  Cooling is Poor  


DESCRIPTION

If the cooling effect of the air conditioning system is weak, the following factors may be the cause.

Symptom Factor
·

Cooling effectiveness is poor

·

Cooling response is slow


·

ECO mode control of air conditioning system is enabled

·

Compressor with motor assembly malfunction

·

Refrigerant volume (high)

·

Refrigerant volume (low)

·

Clogged cooler condenser assembly fins

·

Cooling fan system malfunction

·

Mechanical locking of damper and damper link

·

Solar sensor (automatic light control sensor) malfunction

·

High inlet air temperature

·

Harness or connector



WIRING DIAGRAM

E432296E08
0.229,1.021 1.802,1.396 1.573,0.375 10 false Air Conditioning Amplifier Assembly 1.302,3.698 2.667,3.854 1.365,0.156 10 false h1 1.292,3.875 4.302,4.135 3.01,0.26 10 false Solar Sensor (Automatic Light Control Sensor) 4.49,1.76 5.854,1.917 1.365,0.156 10 false I85 4.646,4.01 6.833,4.438 2.188,0.427 10 false Main Body ECU (Multiplex Network Body ECU) 0.76,4.385 2.979,4.583 2.219,0.198 10 false : CAN Communication Line 4.552,1.563 5.01,1.74 0.458,0.177 10 false 8 4.865,1.646 5.323,1.823 0.458,0.177 10 false CLTB 4.51,2.354 4.969,2.531 0.458,0.177 10 false 20 4.865,2.438 5.323,2.615 0.458,0.177 10 false CLTS 4.51,3.01 4.969,3.188 0.458,0.177 10 false 21 4.875,3.094 5.333,3.271 0.458,0.177 10 false CLTE 3.146,1.656 3.604,1.833 0.458,0.177 10 false CLTB 3.615,1.656 4.073,1.833 0.458,0.177 10 false 1 3.146,2.438 3.604,2.615 0.458,0.177 10 false CLTS 3.615,2.438 4.073,2.615 0.458,0.177 10 false 4 3.615,3.104 4.073,3.281 0.458,0.177 10 false 2 3.135,3.094 3.594,3.271 0.458,0.177 10 false CLTE 4.49,2.552 5.854,2.708 1.365,0.156 10 false I85 4.49,3.208 5.854,3.365 1.365,0.156 10 false I85

PROCEDURE

1.CHECK ECO MODE SETTING
a.

Confirm that ECO HEAT/COOL switch (air conditioning control assembly) is set to off.


b.

Confirm that ECO drive mode is set to off.

HINT:

When the ECO drive mode is set to ON, the air conditioning amplifier assembly performs minimal air conditioning control in order to promote the improvement of fuel economy. Ensure that the customer understands that the airflow volume will be decreased compared to normal operation.

Control Control Summary
Air Volume Control Sets the blower level to less.



Result:
Proceed to
NEXT



NEXT

2.CHECK REFRIGERANT SHORTAGE
2.CHECK REFRIGERANT SHORTAGE
a.

Prepare the vehicle according to the table below.

Measurement Condition:
Item Condition
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

HINT:

*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.



b.

Using the GTS, check the amount of refrigerant.

Body Electrical > Air Conditioner > Utility
Tester Display
Refrigerant Gas Volume Check
50005 450 4578
NOTICE:

If the conditions for the inspection are not met, "Refrigerant incorrect" will be displayed on the GTS. Confirm the conditions of the inspection and perform the check again.


HINT:
·

If the amount of refrigerant is insufficient, "Refrigerant shortage" is displayed on the GTS and the indicator light on the A/C switch turns off.

·

When performing this inspection, a DTC will not be output even if "Refrigerant shortage" is displayed on the GTS.



Result:
Result Amount of Refrigerant
Refrigerant shortage Insufficient or leakage
Refrigerant correct Correct
Refrigerant incorrect Incorrect


OK:

"Refrigerant correct" is displayed on the GTS.



Result:
Proceed to
OK
NG



OK

3.PERFORM ACTIVE TEST USING GTS

NG

CHARGE SYSTEM WITH REFRIGERANT

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REFRIGERANT>REPLACEMENT


3.PERFORM ACTIVE TEST USING GTS
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 Air Mix Damper Control Motor (Potentio) This test activates the front air mix damper control motor (potentio).
(No. 3 air conditioning radiator damper servo sub-assembly) 		0 %: Min
100 %: Max 		Operate with the ignition switch ON.
Body Electrical > Air Conditioner > Active Test
Active Test Display
Front Air Mix Damper Control Motor (Potentio)
Data List Display
Front Air Mix Damper Control Motor Actual Opening (Potentio)
50004 450 89 461
OK:

Damper servo motor is operated.



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (SOLAR SENSOR (AUTOMATIC LIGHT CONTROL SENSOR) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION)

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HV Model (8ZR-FXE))>DIAGNOSTIC TROUBLE CODE CHART


4.CHECK HARNESS AND CONNECTOR (SOLAR SENSOR (AUTOMATIC LIGHT CONTROL SENSOR) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the h1 solar sensor (automatic light control sensor) connector.


b.

Disconnect the I85 main body ECU (multiplex network body ECU) connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
h1-1 (CLTB) - I85-8 (CLTB) Always Below 1 Ω
h1-2 (CLTE) - I85-21 (CLTE) Always Below 1 Ω
h1-4 (CLTS) - I85-20 (CLTS) Always Below 1 Ω
h1-1 (CLTB) or I85-8 (CLTB) - Other terminals and body ground Always 10 kΩ or higher
h1-2 (CLTE) or I85-21 (CLTE) - Other terminals and body ground Always 10 kΩ or higher
h1-4 (CLTS) or I85-20 (CLTS) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.INSPECT SOLAR SENSOR (AUTOMATIC LIGHT CONTROL SENSOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR