RM38T0EC _58 Vehicle Interior _104612 HEATING / AIR CONDITIONING _0601796 AIR CONDITIONING SYSTEM(for HEV Model) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HEV Model)  Operation not Accepted Even If Air Conditioning Switch is Operated  


DESCRIPTION

If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause.

Symptom Factor
Air conditioning system cannot be operated using air conditioning control assembly

(With the exception of the switch indicators, no inputs are reflected when other switches operated)


·

LIN communication malfunction between air conditioning amplifier assembly and air conditioning control assembly

·

Short to +B or ground in air conditioning amplifier assembly circuit

·

Air conditioning amplifier assembly malfunction

·

Air conditioning control assembly malfunction

·

Harness or connector



WIRING DIAGRAM

E375276E18
2.052,0.594 3.469,0.823 1.417,0.229 10 false from Auxiliary Battery 2.052,1.104 3.469,1.333 1.417,0.229 10 false from IGP-MAIN Relay 3.979,0.75 4.885,0.958 0.906,0.208 10 false ECU-B NO. 2 3.927,1.271 4.99,1.479 1.063,0.208 10 false ECU-IGP NO. 2 5.26,0.625 5.51,0.792 0.25,0.167 10 false B 5.25,1.125 5.656,1.323 0.406,0.198 10 false IG+ 5.26,2.385 5.667,2.583 0.406,0.198 10 false GND 5.063,0.49 5.313,0.656 0.25,0.167 10 false 5 5.063,1.01 5.323,1.188 0.26,0.177 10 false 6 5.021,2.26 5.281,2.438 0.26,0.177 10 false 17 0.427,2.771 2.604,3.25 2.177,0.479 10 false Air Conditioning Control Assembly 4.969,2.708 5.375,2.906 0.406,0.198 10 false I49 4.979,2.906 6.552,3.448 1.573,0.542 10 false Air Conditioning Amplifier Assembly 0.948,3.396 2.771,3.615 1.823,0.219 10 false : LIN Communication Line

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.


PROCEDURE

1.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450

Result:
Result Proceed to
B14B287 is not output A
B14B287 is output B



A

2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - POWER SOURCE AND BODY GROUND)

B

GO TO DTC B14B287

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HEV Model)>B14B287


2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - POWER SOURCE AND BODY GROUND)
E389752C03
1.5,0.333 1.948,0.594 0.448,0.26 2.729,2.781 2.604,2.063 true 0.49,2.792 0.833,2.073 true 1.313,2.771 0.99,2.073 true 1.625,0.385 2.083,0.583 0.458,0.198 10 false I49 2.615,2.844 3.073,3.042 0.458,0.198 10 false GND 0.396,2.833 0.573,3.021 0.177,0.188 10 false B 1.26,2.813 1.583,3.063 0.323,0.25 10 false IG+ 0.167,0.135 0.625,0.333 0.458,0.198 10 false *a
*a Front view of wire harness connector
(to Air Conditioning Amplifier Assembly)


a.

Disconnect the I49 air conditioning amplifier assembly connector.


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
I49-5 (B) - Body ground Ignition switch off 11 to 14 V
I49-6 (IG+) - Body ground Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V


Standard Resistance:
Tester Connection Condition Specified Condition
I49-17 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR