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

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

DESCRIPTION

The evaporator temp. sensor (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 evaporator temp. sensor (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 evaporator temp. sensor (No. 1 cooler thermistor) and reads voltage changes as the resistance of the evaporator temp. sensor (No. 1 cooler thermistor) changes. This sensor is used for frost prevention.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	DTC Output from	Priority
P053515	Evaporator Temperature Sensor Circuit Short to Battery or Open	Diagnosis Condition: Ignition switch ON Malfunction: Open or short (+B) in evaporator temperature sensor circuit Detection Time: Continuously for 4 seconds or more	· Evaporator temp. sensor (No. 1 cooler thermistor) · Air conditioning harness assembly · Air conditioning amplifier assembly	Memorized	Air Conditioner	A

DTC Detection Condition Combination Table
		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	Ignition switch ON	○	○
Malfunction	Open in evaporator temperature sensor circuit	○	-
Malfunction	Short (+B) 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

1.875,1.052 2.156,1.292 0.281,0.24 10 false 1 1.885,0.573 2.167,0.813 0.281,0.24 10 false 2 0.219,1.781 1.781,2.177 1.563,0.396 10 false Evaporator Temp. Sensor (No. 1 Cooler Thermistor) 2.188,1.792 4.49,2.198 2.302,0.406 10 false Air Conditioning Harness Assembly 4.646,0.792 4.969,1.021 0.323,0.229 10 false z1 4.823,1.792 7.094,2.104 2.271,0.313 10 false Air Conditioning Amplifier Assembly 4.688,0.594 4.969,0.833 0.281,0.24 10 false 6 4.688,1.063 4.969,1.302 0.281,0.24 10 false 5 5.021,0.792 5.542,1.073 0.521,0.281 10 false TEA 5.021,1.26 5.49,1.51 0.469,0.25 10 false SGA 1.865,0.781 2.333,1.031 0.469,0.25 10 false A 1.865,1.26 2.333,1.51 0.469,0.25 10 false A 4.646,1.26 4.969,1.49 0.323,0.229 10 false z1

PROCEDURE

1.CHECK EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR) CIRCUIT

Pre-procedure1

1.479,0.25 1.896,0.5 0.417,0.25 0.208,0.198 0.521,0.396 0.313,0.198 10 false *a 1.646,0.302 1.958,0.5 0.313,0.198 10 false A

*a	Front view of wire harness connector (to Evaporator Temp. Sensor (No. 1 Cooler Thermistor))

Disconnect the A evaporator temp. sensor (No. 1 cooler thermistor) connector.

Procedure1

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

Standard Voltage:

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

Result:

Proceed to
OK
NG

Post-procedure1

None

2.CLEAR DTC

5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

2.CLEAR DTC

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs: 50002 450

Result:

Proceed to
NEXT

3.CHECK FOR DTC

Pre-procedure1

Turn the ignition switch off.

1.479,0.25 1.896,0.5 0.417,0.25 0.208,0.198 0.521,0.396 0.313,0.198 10 false *a 1.646,0.302 1.958,0.5 0.313,0.198 10 false A

*a	Front view of wire harness connector (to Evaporator Temp. Sensor (No. 1 Cooler Thermistor))

Disconnect the A evaporator temp. sensor (No. 1 cooler thermistor) connector.

0.917,1.771 1.281,2 0.365,0.229 10 false *1 2.667,1.771 3.031,2 0.365,0.229 10 false *2 1.938,0.635 2.396,0.906 0.458,0.271 10 false TEA 1.917,1 2.438,1.24 0.521,0.24 10 false SGA

*1	Evaporator Temp. Sensor (No. 1 Cooler Thermistor)
*2	Air Conditioning Amplifier Assembly

Connect terminals 1 and 2 of the evaporator temp. sensor (No. 1 cooler thermistor) connector on the wire harness side.

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

Procedure1

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes: 50001 450

Result:

Result	Proceed to
P053511 is output	A
P053515 is output	B

Post-procedure1

None

REPLACE EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR)

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT EVAPORATOR TEMPERATURE SENSOR>REMOVAL202111,202203,_58,_111841,_0499803,RM100000001Z09R,202203,202303,_58,_111841,_0499803,RM1000000022E3Q,202303,202406,_58,_111841,_0499803,RM100000002BIZ4,202406,202409,_58,_111841,_0499803,RM100000002MQ32,202409,999999,_58,_111841,_0499803,RM100000002OSYB,

4.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

Pre-procedure1

Remove the air conditioning harness assembly.

HINT:: Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT AIR CONDITIONING UNIT>DISASSEMBLY202111,999999,_58,_111841,_0499792,RM100000001Z08D,

Procedure1

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

1.771,0.146 2.188,0.396 0.417,0.25 4.927,0.177 5.344,0.427 0.417,0.25 1.583,1.542 1.771,1.24 true 2.021,1.531 1.917,1.25 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 1.896,0.188 2.26,0.396 0.365,0.208 10 false z1 1.427,1.563 1.854,1.76 0.427,0.198 10 false SGA 1.927,1.563 2.313,1.74 0.385,0.177 10 false TEA 5.094,0.219 5.406,0.417 0.313,0.198 10 false A

Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly)

Front view of air conditioning harness assembly connector
(to Evaporator Temp. Sensor (No. 1 Cooler Thermistor))

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(z1)Location & Routingewd_type=routing;type=c;code=z1 Click Connector(z1)Instrument Panel>Other>Air Conditioning Harness Assembly, Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=z1;pinno=6,5
A-2 - z1-6 (TEA)	Always	Below 1 Ω
A-1 - z1-5 (SGA)	Always	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(z1)Location & Routingewd_type=routing;type=c;code=z1

Click Connector(z1)Instrument Panel>Other>Air Conditioning Harness Assembly, Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=z1;pinno=6,5

A-2 - z1-6 (TEA)

Always

Below 1 Ω

A-1 - z1-5 (SGA)

Always

Below 1 Ω

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL202111,999999,_58,_111841,_0499808,RM100000001Z0AA,

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT AIR CONDITIONING UNIT>DISASSEMBLY202111,999999,_58,_111841,_0499792,RM100000001Z08D,

5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

Pre-procedure1

Remove the air conditioning harness assembly.

HINT:: Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT AIR CONDITIONING UNIT>DISASSEMBLY202111,999999,_58,_111841,_0499792,RM100000001Z08D,

Procedure1

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

Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly)

Front view of air conditioning harness assembly connector
(to Evaporator Temp. Sensor (No. 1 Cooler Thermistor))

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(z1)Location & Routingewd_type=routing;type=c;code=z1 Click Connector(z1)Instrument Panel>Other>Air Conditioning Harness Assembly, Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=z1;pinno=6
A-2 or z1-6 (TEA) - Other terminals and body ground	Always	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(z1)Location & Routingewd_type=routing;type=c;code=z1

Click Connector(z1)Instrument Panel>Other>Air Conditioning Harness Assembly, Air Conditioning Amplifier Assemblyewd_type=component;type=c;code=z1;pinno=6

A-2 or z1-6 (TEA) - Other terminals and body ground

Always

10 kΩ or higher

Result:

Proceed to
OK
NG

Post-procedure1

None

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL202111,999999,_58,_111841,_0499808,RM100000001Z0AA,

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT AIR CONDITIONING UNIT>DISASSEMBLY202111,999999,_58,_111841,_0499792,RM100000001Z08D,