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)  P053511  Evaporator Temperature Sensor Circuit Short to Ground  


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
P053511 Evaporator Temperature Sensor Circuit Short to Ground Diagnosis Condition:

Ignition switch ON


Malfunction:

Short (GND) 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

WIRING DIAGRAM

E546058E08
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.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs
50002 450

Result:
Proceed to
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC

Pre-procedure1

a.

Turn the ignition switch off.


b.
E478812C28
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 1.948,0.646 2.406,0.917 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


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


c.

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


Procedure1

d.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450
Result:
Result Proceed to
P053511 is not output A
P053511 is output B



Post-procedure1

e.

None



A

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

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


B

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

Pre-procedure1

a.

Remove the air conditioning harness assembly.

HINT:

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



Procedure1

b.

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

E432366C06
1.771,0.146 2.188,0.396 0.417,0.25 4.927,0.177 5.344,0.427 0.417,0.25 1.271,1.031 1.75,1.198 true 1.938,1.208 2.448,1.01 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 1.906,0.188 2.219,0.385 0.313,0.198 10 false z1 0.927,0.938 1.417,1.156 0.49,0.219 10 false SGA 2.5,0.917 2.99,1.135 0.49,0.219 10 false TEA 5.094,0.219 5.406,0.417 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 Evaporator Temp. Sensor (No. 1 Cooler Thermistor))


Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(z1)Location & Routing

Click Connector(z1)Instrument Panel>Other>Air Conditioning Harness Assembly, Air Conditioning Amplifier Assembly

A-2 or z1-6 (TEA) - Other terminals and body ground Always 10 kΩ or higher
A-1 or z1-5 (SGA) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

c.

None



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>FRONT AIR CONDITIONING UNIT>DISASSEMBLY