RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0598792 AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE))  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
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

WIRING DIAGRAM

E546058E14
1.875,1.052 2.156,1.292 0.281,0.24 10 false 2 1.885,0.573 2.167,0.813 0.281,0.24 10 false 1 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 4.615,0.792 4.979,1.031 0.365,0.24 10 false z26 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 3 4.667,1.063 4.948,1.302 0.281,0.24 10 false 16 5.01,0.792 5.531,1.073 0.521,0.281 10 false TE 5.01,1.26 5.875,1.5 0.865,0.24 10 false SG-Pots/TE 1.875,0.781 2.344,1.031 0.469,0.25 10 false E 1.875,1.26 2.344,1.51 0.469,0.25 10 false E 4.625,1.26 4.948,1.49 0.323,0.229 10 false z26

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
a.

Turn the ignition switch off.


b.
E478812C54
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 2.031,0.646 2.49,0.917 0.458,0.271 10 false TE 1.479,0.99 2.344,1.167 0.865,0.177 10 false SG-Pots/TE
*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.


d.

Check for DTCs.

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




A

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

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT EVAPORATOR TEMPERATURE SENSOR (for HV Model)>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)
a.

Remove the air conditioning harness assembly.

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


b.

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

E512293C01
1.646,0.5 2.042,0.708 0.396,0.208 5.083,0.458 5.479,0.667 0.396,0.208 4.292,2.135 4.677,1.448 true 5.344,2.146 5.115,1.646 true 1.25,0.531 1.563,0.688 0.313,0.156 10 false *a 4.479,0.469 4.792,0.625 0.313,0.156 10 false *b 1.802,0.521 2.115,0.677 0.313,0.156 10 false E 5.167,0.479 5.5,0.656 0.333,0.177 10 false z26 4.188,2.177 4.542,2.396 0.354,0.219 10 false TE 5.031,2.177 5.938,2.438 0.906,0.26 10 false SG-Pots/TE
*a Front view of air conditioning harness assembly connector
(to Evaporator Temp. Sensor (No. 1 Cooler Thermistor)) 		*b Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly)


Standard Resistance:
Tester Connection Condition Specified Condition
E-1 or z26-3 (TE) - Other terminals and body ground Always 10 kΩ or higher
E-2 or z26-16 (SG-Pots/TE) - 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 (for HV Model)>DISASSEMBLY