RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386653 AIR CONDITIONING SYSTEM(for Manual Cooler System) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Manual Cooler System)  B1413  Evaporator Temperature Circuit or Evaporator Fin Thermistor  


DESCRIPTION

The No. 1 cooler thermistor is installed to the evaporator in the air conditioning unit to detect the temperature of the cooled air that has passed through the evaporator, which is used to control the air conditioning system. It sends signals to the air conditioning amplifier assembly. The resistance of the No. 1 cooler thermistor changes in accordance with the temperature of the cooled air that has passed through the evaporator. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The air conditioning amplifier assembly applies voltage (5 V) to the No. 1 cooler thermistor and reads voltage changes as the resistance of the No. 1 cooler thermistor changes. This sensor is used for frost prevention.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1413 Evaporator Temperature Sensor Circuit
·

Diagnosis condition: None

·

Malfunction status: Open or short in evaporator temperature sensor circuit

·

Detection time: None (Present malfunction), continuously for 4 seconds or more (Past malfunction)


·

No. 1 cooler thermistor

·

Air conditioning harness assembly

·

Air conditioning amplifier assembly


Memorized

WIRING DIAGRAM

E414347E01
4.958,1.615 5.271,1.813 0.313,0.198 10 false N39 4.969,1.76 6.542,2.135 1.573,0.375 10 false Air Conditioning Amplifier Assembly 6.167,0.635 6.479,0.833 0.313,0.198 10 false AD 5.719,0.219 6.031,0.417 0.313,0.198 10 false 5 V 4.792,0.521 5.104,0.719 0.313,0.198 10 false TE 4.813,1 5.281,1.198 0.469,0.198 10 false SG-3 4.563,0.521 4.875,0.719 0.313,0.198 10 false 6 4.573,0.99 5.042,1.188 0.469,0.198 10 false 5 3,0.521 3.313,0.719 0.313,0.198 10 false 1 3.031,1 3.344,1.198 0.313,0.198 10 false 2 1.115,1.521 2.729,1.76 1.615,0.24 10 false N85 1.115,1.677 2.729,1.917 1.615,0.24 10 false No. 1 Cooler Thermistor

PROCEDURE

1.READ VALUE USING GTS (EVAPORATOR FIN THERMISTOR)
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
Evaporator Fin Thermistor No. 1 cooler thermistor Min.: -29.70°C (-21.46°F)
Max.: 59.55°C (139.19°F) 		Actual evaporator temperature displayed No. 1 cooler thermistor system malfunction
·

When open circuit: -29.70°C (-21.46°F)

·

When short circuit: 59.55°C (139.19°F)


Body Electrical > Air Conditioner > Data List
Tester Display
Evaporator Fin Thermistor
50003 121 3
OK:

The display is as specified in the normal condition column.



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


NG

2.INSPECT NO. 1 COOLER THERMISTOR
3.CHECK HARNESS AND CONNECTOR (NO. 1 COOLER THERMISTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
a.

Disconnect the N85 No. 1 cooler thermistor connector.


b.

Disconnect the N39 air conditioning amplifier assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N39-6 (TE) - N85-1 Always Below 1 Ω
N39-5 (SG-3) - N85-2 Always Below 1 Ω
N39-6 (TE) or N85-1 - Other terminals and body ground Always 10 kΩ or higher
N39-5 (SG-3) or N85-2 - Other terminals and body ground Always 10 kΩ or higher



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