RM38N0EC _58 Vehicle Interior _111841 HEATING / AIR CONDITIONING _0499788 AIR CONDITIONING SYSTEM(for Gasoline Model) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model)  Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting)  


DESCRIPTION

If the temperature of the air that blows from the left and right front registers differs even though the same temperature is set for both sides, the following factors may be the cause.

Symptom Factor
Temperature of outlet air is cooler on left or right side

(When same temperature set for both sides)


·

Compressor assembly with pulley malfunction

·

Refrigerant volume (low)

·

Mechanical locking of damper and damper link

·

Automatic light control sensor malfunction

·

Harness or connector


Temperature of outlet air is warmer on left or right side

(When same temperature set for both sides)


·

Mechanical locking of damper and damper link

·

Blockage in heater radiator unit sub-assembly

·

Harness or connector



WIRING DIAGRAM

E432296E02
0.229,1.021 1.802,1.396 1.573,0.375 10 false Air Conditioning Amplifier Assembly 1.854,3.865 3.219,4.021 1.365,0.156 10 false E74 1.833,4.031 4.052,4.229 2.219,0.198 10 false Automatic Light Control Sensor 4.458,1.76 5.823,1.917 1.365,0.156 10 false E37 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 4.458,2.552 5.823,2.708 1.365,0.156 10 false E37 4.458,3.208 5.823,3.365 1.365,0.156 10 false E37

CAUTION / NOTICE / HINT

NOTICE:
·

If DTC B124400 is output, perform troubleshooting for that DTC first.

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>B124400

·

The air conditioning system uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the air conditioning system after confirming that the communication systems are functioning properly.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING



PROCEDURE

1.CHECK MALFUNCTION STATUS
Result:
Result Proceed to
Malfunction occurs during cooling A
Malfunction occurs during heating B



A

2.CHECK REFRIGERANT SHORTAGE

B

6.BLEED AIR FROM COOLANT (COOLING SYSTEM)
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 Left Air Mix Damper Control Servo Motor This test activates the Front Left Air Mix Damper Control Servo Motor.
(No. 1 air conditioning radiator damper servo sub-assembly (front left side air mix)) 		128: Min
384: Max 		Operate with ignition switch ON.
Front Right Air Mix Damper Control Servo Motor This test activates the Front Right Air Mix Damper Control Servo Motor.
(No. 1 air conditioning radiator damper servo sub-assembly (front right side air mix)) 		128: Min
384: Max 		Operate with ignition switch ON.
Body Electrical > Air Conditioner > Active Test
Active Test Display
Front Left Air Mix Damper Control Servo Motor
Data List Display
Front Left Air Mix Damper Control Servo Motor Actual Pulse
50004 450 26 201
Body Electrical > Air Conditioner > Active Test
Active Test Display
Front Right Air Mix Damper Control Servo Motor
Data List Display
Front Right Air Mix Damper Control Servo Motor Actual Pulse
50004 450 28 205
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 DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION)

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model)>DIAGNOSTIC TROUBLE CODE CHART


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

Disconnect the E74 automatic light control sensor connector.


b.

Disconnect the E37 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

Click Location & Routing(E74,E37)Location & Routing

Click Connector(E74)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Automatic Light Control Sensor

Click Connector(E37)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Multiplex Network Body ECU

E74-1 (CLTB) - E37-8 (CLTB) Always Below 1 Ω
E74-2 (CLTE) - E37-21 (CLTE) Always Below 1 Ω
E74-4 (CLTS) - E37-20 (CLTS) Always Below 1 Ω
E74-1 (CLTB) or E37-8 (CLTB) - Other terminals and body ground Always 10 kΩ or higher
E74-2 (CLTE) or E37-21 (CLTE) - Other terminals and body ground Always 10 kΩ or higher
E74-4 (CLTS) or E37-20 (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.BLEED AIR FROM COOLANT (COOLING SYSTEM)

Click hereEngine / Hybrid System>M20C-FKS, M20D-FKS (COOLING)>COOLANT (for Engine)>REPLACEMENT

Result:
Proceed to
NEXT



NEXT

7.CHECK OPERATION (AIR CONDITIONING SYSTEM)
7.CHECK OPERATION (AIR CONDITIONING SYSTEM)
a.

Set the same temperature for the left and right sides and check that the air that blows from the left and right front registers is the same temperature.

OK:

The air from the left and right front registers is the same temperature.



Result:
Proceed to
OK
NG



OK

END (FAILURE DUE TO AIR ENTERING COOLANT)

NG

8.PERFORM ACTIVE TEST USING GTS
8.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 Left Air Mix Damper Control Servo Motor This test activates the Front Left Air Mix Damper Control Servo Motor.
(No. 1 air conditioning radiator damper servo sub-assembly (front left side air mix)) 		128: Min
384: Max 		Operate with ignition switch ON.
Front Right Air Mix Damper Control Servo Motor This test activates the Front Right Air Mix Damper Control Servo Motor.
(No. 1 air conditioning radiator damper servo sub-assembly (front right side air mix)) 		128: Min
384: Max 		Operate with ignition switch ON.
Body Electrical > Air Conditioner > Active Test
Active Test Display
Front Left Air Mix Damper Control Servo Motor
Data List Display
Front Left Air Mix Damper Control Servo Motor Actual Pulse
50004 450 26 201
Body Electrical > Air Conditioner > Active Test
Active Test Display
Front Right Air Mix Damper Control Servo Motor
Data List Display
Front Right Air Mix Damper Control Servo Motor Actual Pulse
50004 450 28 205
OK:

Damper servo motor is operated.



Result:
Proceed to
OK
NG



OK

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT AIR CONDITIONING UNIT>DISASSEMBLY


NG

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

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model)>DIAGNOSTIC TROUBLE CODE CHART