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

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HEV Model)  P053515  Evaporator Temperature Sensor Circuit Short to Battery or Open  


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 to the No. 1 cooler thermistor and reads voltage changes as the resistance of the No. 1 cooler thermistor changes.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
P053515 Evaporator Temperature Sensor Circuit Short to Battery or Open Diagnosis Condition:

Ignition switch ON


Malfunction Status:

Open or short in evaporator temperature sensor circuit


Detection Time:

Continuously for 4 seconds or more


·

No. 1 cooler thermistor

·

Air conditioning harness assembly

·

Air conditioning amplifier assembly


Memorized

DTC Detection Condition Combination Table
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition Ignition switch ON ○ ○
Malfunction Open in evaporator temperature sensor circuit ○ -
Short in evaporator temperature sensor circuit - ○
Detection Time Continuously for 4 seconds or more Continuously for 4 seconds or more
Trip Count 1 trip 1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored


WIRING DIAGRAM

w/ Rear Air Duct
E521202E04
2.479,1.188 2.76,1.427 0.281,0.24 10 false 1 2.469,0.375 2.75,0.615 0.281,0.24 10 false 2 0.635,1.927 2.198,2.323 1.563,0.396 10 false No. 1 Cooler Thermistor 2.948,1.948 4.5,2.323 1.552,0.375 10 false Air Conditioning Harness Assembly 5.177,1.938 6.75,2.552 1.573,0.615 10 false Air Conditioning Amplifier Assembly 4.875,0.385 5.156,0.625 0.281,0.24 10 false 6 4.885,1.198 5.167,1.438 0.281,0.24 10 false 5 5.177,0.583 5.698,0.865 0.521,0.281 10 false TEA 5.177,1.406 5.646,1.656 0.469,0.25 10 false SGA 4.844,1.406 5.167,1.635 0.323,0.229 10 false z1 4.854,0.594 5.177,0.823 0.323,0.229 10 false z1 2.469,0.583 2.792,0.813 0.323,0.229 10 false A 2.469,1.406 2.792,1.635 0.323,0.229 10 false A

w/o Rear Air Duct
E521202E07
2.479,1.188 2.76,1.427 0.281,0.24 10 false 1 2.469,0.375 2.75,0.615 0.281,0.24 10 false 2 0.635,1.927 2.198,2.323 1.563,0.396 10 false No. 1 Cooler Thermistor 2.948,1.948 4.5,2.323 1.552,0.375 10 false Air Conditioning Harness Assembly 5.177,1.938 6.75,2.552 1.573,0.615 10 false Air Conditioning Amplifier Assembly 4.875,0.385 5.156,0.625 0.281,0.24 10 false 6 4.885,1.198 5.167,1.438 0.281,0.24 10 false 5 5.177,0.583 5.698,0.865 0.521,0.281 10 false TE 5.177,1.406 5.646,1.656 0.469,0.25 10 false SG-3 4.813,0.583 5.135,0.813 0.323,0.229 10 false m6 4.833,1.406 5.156,1.635 0.323,0.229 10 false m6 2.417,0.594 2.74,0.823 0.323,0.229 10 false m2 2.438,1.396 2.76,1.625 0.323,0.229 10 false m2

PROCEDURE

1.CHECK VEHICLE TYPE
a.

Check vehicle specifications.


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



A

2.CHECK NO. 1 COOLER THERMISTOR CIRCUIT

B

7.CHECK NO. 1 COOLER THERMISTOR CIRCUIT
2.CHECK NO. 1 COOLER THERMISTOR CIRCUIT
a.

Disconnect the No. 1 cooler thermistor connector.


b.
E448665C14
0.917,0.979 1.333,1.208 0.417,0.229 0.24,0.177 0.552,0.375 0.313,0.198 10 false *a 1.083,1 1.323,1.198 0.24,0.198 10 false A
*a Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A-2 - Body ground Ignition switch ON 0 to 5.5 V



Result:
Proceed to
OK
NG



OK

3.CLEAR DTC

NG

6.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
3.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs
50002 450

Result:
Proceed to
NEXT



NEXT

4.CHECK FOR DTC
4.CHECK FOR DTC
a.

Turn the ignition switch off.


b.

Connect terminals 1 and 2 of the No. 1 cooler thermistor connector on the wire harness side.

E446847C16
5.354,0.625 5.771,0.844 0.417,0.219 1.094,2.042 1.417,2.344 0.323,0.302 10 false *1 3.104,2.031 3.427,2.333 0.323,0.302 10 false *2 4.802,0.531 5.125,0.833 0.323,0.302 10 false *a 2.521,1.031 2.844,1.333 0.323,0.302 10 false TEA 2.51,1.427 3.125,1.781 0.615,0.354 10 false SGA 5.521,0.646 5.844,0.948 0.323,0.302 10 false A
*1 No. 1 Cooler Thermistor *2 Air Conditioning Amplifier Assembly
*a Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor) 		- -



c.

Turn the ignition switch to ON and wait for 4 seconds or more.


d.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450
Result:
Result Proceed to
P053511 is output A
P053515 is output B




A

REPLACE NO. 1 COOLER THERMISTOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT EVAPORATOR TEMPERATURE SENSOR>REMOVAL


B

5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Remove the air conditioning harness assembly.

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


b.

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

E432366C52
1.771,0.146 2.188,0.396 0.417,0.25 4.927,0.177 5.344,0.427 0.417,0.25 1.917,1.24 2.427,1.51 true 1.792,1.24 1.292,1.49 true 1.271,0.188 1.583,0.385 0.313,0.198 10 false *a 4.458,0.167 4.771,0.365 0.313,0.198 10 false *b 1.917,0.188 2.229,0.385 0.313,0.198 10 false z1 0.979,1.448 1.469,1.667 0.49,0.219 10 false SGA 2.5,1.458 2.99,1.677 0.49,0.219 10 false TEA 5.083,0.229 5.396,0.427 0.313,0.198 10 false A
*a Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly) 		*b Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor)


Standard Resistance:
Tester Connection Condition Specified Condition
z1-5 (SGA) - A-1 Always Below 1 Ω
z1-6 (TEA) - A-2 Always Below 1 Ω



c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A-1 - Body ground Ignition switch ON Below 1 V
A-2 - Body ground Ignition switch ON Below 1 V



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>DISASSEMBLY


6.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Remove the air conditioning harness assembly.

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


b.

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

E432366C76
1.771,0.146 2.188,0.396 0.417,0.25 4.927,0.177 5.344,0.427 0.417,0.25 1.927,1.229 2.479,1.552 true 1.271,0.188 1.583,0.385 0.313,0.198 10 false *a 4.458,0.167 4.771,0.365 0.313,0.198 10 false *b 1.896,0.198 2.208,0.396 0.313,0.198 10 false z1 2.542,1.49 3.031,1.708 0.49,0.219 10 false TEA 5.083,0.229 5.396,0.427 0.313,0.198 10 false A
*a Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly) 		*b Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor)


Standard Resistance:
Tester Connection Condition Specified Condition
z1-6 (TEA) or A-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

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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


7.CHECK NO. 1 COOLER THERMISTOR CIRCUIT
a.

Disconnect the No. 1 cooler thermistor connector.


b.
E448665C15
0.917,0.979 1.333,1.208 0.417,0.229 0.24,0.177 0.552,0.375 0.313,0.198 10 false *a 1.052,1 1.292,1.198 0.24,0.198 10 false m2
*a Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor)


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
m2-2 - Body ground Ignition switch ON 0 to 5.5 V



Result:
Proceed to
OK
NG



OK

8.CLEAR DTC

NG

11.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
8.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs
50002 450

Result:
Proceed to
NEXT



NEXT

9.CHECK FOR DTC
9.CHECK FOR DTC
a.

Turn the ignition switch off.


b.

Connect terminals 1 and 2 of the No. 1 cooler thermistor connector on the wire harness side.

E446847C28
5.354,0.625 5.771,0.844 0.417,0.219 1.094,2.042 1.417,2.344 0.323,0.302 10 false *1 3.104,2.031 3.427,2.333 0.323,0.302 10 false *2 4.802,0.531 5.125,0.833 0.323,0.302 10 false *a 2.594,1.01 2.917,1.313 0.323,0.302 10 false TE 2.458,1.396 3.073,1.75 0.615,0.354 10 false SG-3 5.469,0.646 5.792,0.948 0.323,0.302 10 false m2
*1 No. 1 Cooler Thermistor *2 Air Conditioning Amplifier Assembly
*a Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor) 		- -



c.

Turn the ignition switch to ON and wait for 4 seconds or more.


d.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450
Result:
Result Proceed to
P053511 is output A
P053515 is output B




A

REPLACE NO. 1 COOLER THERMISTOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT EVAPORATOR TEMPERATURE SENSOR>REMOVAL


B

10.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
10.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Remove the air conditioning harness assembly.

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


b.

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

E432366C77
1.771,0.146 2.188,0.396 0.417,0.25 4.927,0.177 5.344,0.427 0.417,0.25 1.917,1.24 2.427,1.51 true 1.792,1.24 1.292,1.49 true 1.271,0.188 1.583,0.385 0.313,0.198 10 false *a 4.458,0.167 4.771,0.365 0.313,0.198 10 false *b 1.875,0.188 2.188,0.385 0.313,0.198 10 false m6 0.917,1.448 1.406,1.667 0.49,0.219 10 false SG-3 2.5,1.458 2.99,1.677 0.49,0.219 10 false TE 5.031,0.229 5.344,0.427 0.313,0.198 10 false m2
*a Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly) 		*b Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor)


Standard Resistance:
Tester Connection Condition Specified Condition
m6-5 (SG-3) - m2-1 Always Below 1 Ω
m6-6 (TE) - m2-2 Always Below 1 Ω



c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
m2-1 - Body ground Ignition switch ON Below 1 V
m2-2 - Body ground Ignition switch ON Below 1 V



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>DISASSEMBLY


11.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Remove the air conditioning harness assembly.

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


b.

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

E432366C78
1.771,0.146 2.188,0.396 0.417,0.25 4.927,0.177 5.344,0.427 0.417,0.25 1.927,1.229 2.479,1.552 true 1.271,0.188 1.583,0.385 0.313,0.198 10 false *a 4.458,0.167 4.771,0.365 0.313,0.198 10 false *b 1.865,0.188 2.177,0.385 0.313,0.198 10 false m6 2.542,1.49 3.031,1.708 0.49,0.219 10 false TE 5.031,0.229 5.344,0.427 0.313,0.198 10 false m2
*a Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly) 		*b Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor)


Standard Resistance:
Tester Connection Condition Specified Condition
m6-6 (TE) or m2-2 - 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

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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