RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0591215 AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)  B1413  Evaporator Temperature Circuit or Evaporator Fin Thermistor  


DESCRIPTION

The No. 1 cooler thermistor is installed to the evaporator in the air conditioner 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 Circuit or Evaporator Fin Thermistor Open or short in evaporator temperature sensor circuit
·

No. 1 cooler thermistor

·

Air conditioning harness assembly

·

Air conditioning amplifier assembly


Memorized
(4 sec. or more)*

*: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.


WIRING DIAGRAM

E418174E05
0.281,2.094 3.802,2.292 3.521,0.198 10 false No. 1 Cooler Thermistor 2.177,2.104 5.698,2.302 3.521,0.198 10 false Air Conditioning Harness Assembly 4.813,2.104 7.125,2.542 2.313,0.438 10 false Air Conditioning Amplifier Assembly 0.281,1.938 1.51,2.292 1.229,0.354 10 false m2*1, C*2 4.802,1.938 6.031,2.292 1.229,0.354 10 false m3*1, z1*2 1.75,0.833 2.979,1.188 1.229,0.354 10 false 2 1.74,1.302 2.969,1.656 1.229,0.354 10 false 1 4.802,0.823 6.031,1.177 1.229,0.354 10 false 6 4.802,1.302 6.031,1.656 1.229,0.354 10 false 5 5.01,0.833 6.24,1.188 1.229,0.354 10 false TE 5.01,1.302 6.24,1.656 1.229,0.354 10 false SG-3 5.656,0.323 6.885,0.677 1.229,0.354 10 false 5 V 6.479,0.938 6.958,1.396 0.479,0.458 10 false AD 0.406,2.75 4.313,3.604 3.906,0.854 10 false *1: w/o Rear Air Duct 0.406,3.219 4.885,3.802 4.479,0.583 10 false *2: w/ Rear Air Duct

PROCEDURE

1.READ VALUE USING GTS
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 circuit 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.CONFIRM MODEL
a.

Choose the model to be inspected.


Result:
Result Proceed to
w/o Rear Air Duct A
w/ Rear Air Duct B



A

4.INSPECT AIR CONDITIONING HARNESS ASSEMBLY

B

5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
4.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
E378688C08
0.917,0.833 1.333,1.083 0.417,0.25 4.167,0.833 4.583,1.083 0.417,0.25 1.292,1.479 1.781,1.26 true 2.542,1.458 1.906,1.24 true 1.167,0.229 1.479,0.427 0.313,0.198 10 false *a 4.469,0.302 4.781,0.5 0.313,0.198 10 false *b 1.031,0.875 1.344,1.073 0.313,0.198 10 false m3 4.271,0.875 4.583,1.073 0.313,0.198 10 false m2 1.094,1.51 1.583,1.729 0.49,0.219 10 false SG-3 2.542,1.49 3.031,1.708 0.49,0.219 10 false TE
*a Front view of wire harness connector
(to Air Conditioning Amplifier Assembly) 		*b Front view of wire harness connector
(to No. 1 Cooler Thermistor)


a.

Remove the air conditioning harness assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
m3-5 (SG-3) - m2-1 Always Below 1 Ω
m3-6 (TE) - m2-2 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

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
E378688C06
0.896,0.875 1.333,1.094 0.438,0.219 4.135,0.896 4.573,1.115 0.438,0.219 1.292,1.479 1.781,1.26 true 2.542,1.458 1.906,1.24 true 1.167,0.229 1.479,0.427 0.313,0.198 10 false *a 4.469,0.302 4.781,0.5 0.313,0.198 10 false *b 1.042,0.896 1.354,1.094 0.313,0.198 10 false z1 4.292,0.927 4.604,1.125 0.313,0.198 10 false C 1.094,1.51 1.583,1.729 0.49,0.219 10 false SG-3 2.542,1.49 3.031,1.708 0.49,0.219 10 false TE
*a Front view of wire harness connector
(to Air Conditioning Amplifier Assembly) 		*b Front view of wire harness connector
(to No. 1 Cooler Thermistor)


a.

Remove the air conditioning harness assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
z1-5 (SG-3) - C-1 Always Below 1 Ω
z1-6 (TE) - C-2 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

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>DISASSEMBLY