RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386651 AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)  Cooling is Poor  


DESCRIPTION

If the cooling air is poor (cooling air is discharged), the following causes are possible.

Malfunction Status Factor
for Front:
·

Cooling is poor.

·

Takes time to cool down.


·

Compressor with magnet clutch 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

·

Warm air flow


for Rear (w/ Integration Control Panel (for Rear Automatic Air Conditioning)):
·

Cooling is poor.

·

Takes time to cool down.


·

Air mix damper and link operation (jamming) (for Rear Automatic Air Conditioning)

·

No. 2 cooler thermistor assembly

·

Cooler expansion valve

·

Warm air flow



WIRING DIAGRAM

for Front:
E366622E14
0.229,1.021 1.802,1.396 1.573,0.375 10 false Air Conditioning Amplifier Assembly 1.844,3.865 3.208,4.021 1.365,0.156 10 false Q2 1.854,4.021 4.073,4.219 2.219,0.198 10 false Automatic Light Control Sensor 4.646,3.969 6.01,4.125 1.365,0.156 10 false N19 4.646,4.125 6.833,4.552 2.188,0.427 10 false Main Body ECU (Multiplex Network Body ECU) 1.021,4.479 3.24,4.677 2.219,0.198 10 false : CAN Communication Line 4.594,1.646 5.052,1.823 0.458,0.177 10 false 23 4.885,1.646 5.344,1.823 0.458,0.177 10 false CLTB 4.594,2.427 5.052,2.604 0.458,0.177 10 false 24 4.906,2.427 5.365,2.604 0.458,0.177 10 false CLTS 4.615,3.094 5.073,3.271 0.458,0.177 10 false 25 4.906,3.083 5.365,3.26 0.458,0.177 10 false CLTE 3.104,1.646 3.563,1.823 0.458,0.177 10 false CLTB 3.625,1.656 4.083,1.833 0.458,0.177 10 false 1 3.125,2.438 3.583,2.615 0.458,0.177 10 false CLTS 3.615,2.427 4.073,2.604 0.458,0.177 10 false 4 3.615,3.104 4.073,3.281 0.458,0.177 10 false 2 3.125,3.115 3.583,3.292 0.458,0.177 10 false CLTE

PROCEDURE

1.CHECK VEHICLE TYPE
Result:
Result Proceed to
for Front A
for Rear (w/ Integration Control Panel (for Rear Automatic Air Conditioning)) B



A

2.CHECK REFRIGERANT PRESSURE

B

6.PERFORM ACTIVE TEST USING GTS (SERVO PULSE)
2.CHECK REFRIGERANT PRESSURE
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Regulator Pressure Sensor Air conditioner pressure sensor Min.: -0.4566 MPaG (gauge)
Max.: 3.2943 MPaG (gauge) 		Actual refrigerant pressure displayed
·

Refrigerant line (gas leak, etc.)

·

Air conditioner pressure sensor system malfunction


Body Electrical > Air Conditioner > Data List
Tester Display
Regulator Pressure Sensor
50003 121 51

f.

Install a manifold gauge set.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REFRIGERANT>ON-VEHICLE INSPECTION


g.

Read the manifold gauge pressure when the following conditions are met.

i.

Prepare the vehicle according to the table below.

Measurement Condition:
Item Condition
Vehicle Condition Engine running
Doors Fully closed (windows also fully closed)
A/C Switch On
Recirculation/fresh Control Switch Recirculation
Set Temperature MAX COLD
Blower Speed HI
Air Conditioning Air Inlet Temperature 25 to 35°C (77 to 95°F)



Standard pressure:
Low pressure side:

150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)

High pressure side:

1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)


h.

Compare the values displayed in the Data List and on the manifold gauge.

OK:

The values displayed in the Data List and on the manifold gauge match.



Result:
Proceed to
OK
NG



OK

3.PERFORM ACTIVE TEST USING GTS (SERVO PULSE)

NG

CHARGE SYSTEM WITH REFRIGERANT

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


3.PERFORM ACTIVE TEST USING GTS (SERVO PULSE)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active Test.


e.

Check the operation by referring to the table below.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Air Mix Servo Targ Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly (air mix) pulse Min.: 128
Max.: 383 		Operates between 165 to 257 pulses
Body Electrical > Air Conditioner > Active Test
Tester Display
Air Mix Servo Targ Pulse(D)
50004 121 24
OK:

Damper servo motor is operated.



Result:
Proceed to
OK
NG



OK

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

NG

GO TO DTC OF APPLICABLE SERVO MOTOR OPERATING ABNORMALLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System)>DIAGNOSTIC TROUBLE CODE CHART


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

Disconnect the Q2 automatic light control sensor connector.


b.

Disconnect the N19 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
Q2-1 (CLTB) - N19-23 (CLTB) Always Below 1 Ω
Q2-2 (CLTE) - N19-25 (CLTE) Always Below 1 Ω
Q2-4 (CLTS) - N19-24 (CLTS) Always Below 1 Ω
Q2-1 (CLTB) or N19-23 (CLTB) - Other terminals and body ground Always 10 kΩ or higher
Q2-2 (CLTE) or N19-25 (CLTE) - Other terminals and body ground Always 10 kΩ or higher
Q2-4 (CLTS) or N19-24 (CLTS) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.INSPECT AUTOMATIC LIGHT CONTROL SENSOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.PERFORM ACTIVE TEST USING GTS (SERVO PULSE)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Active Test.


e.

Check the operation by referring to the table below.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Rear Air Mix Servo Targ Pulse No. 1 rear cooling unit damper servo motor sub-assembly (rear air mix) pulse Min.: 128
Max.: 383 		Operates between 254 and 299 pulses
Body Electrical > Air Conditioner > Active Test
Tester Display
Rear Air Mix Servo Targ Pulse
50004 121 36
OK:

Damper servo motor is operated.



Result:
Proceed to
OK
NG



OK

7.INSPECT NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (NO. 2 COOLER THERMISTOR)

NG

GO TO DTC OF APPLICABLE SERVO MOTOR OPERATING ABNORMALLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System)>DIAGNOSTIC TROUBLE CODE CHART


7.INSPECT NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (NO. 2 COOLER THERMISTOR)
a.

Remove the No. 2 air conditioning harness assembly (No. 2 cooler thermistor).

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR EVAPORATOR TEMPERATURE SENSOR (for Rear Air Conditioning System)>REMOVAL


b.

Inspect the No. 2 air conditioning harness connector (No. 2 cooler thermistor).

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR EVAPORATOR TEMPERATURE SENSOR (for Rear Air Conditioning System)>INSPECTION


Result:
Proceed to
OK
NG



OK

8.INSPECT COOLER EXPANSION VALVE

NG

REPLACE NO. 2 COOLER THERMISTOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REAR EVAPORATOR TEMPERATURE SENSOR (for Rear Air Conditioning System)>REMOVAL