Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000028C43
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): P053515; Evaporator Temperature Sensor Circuit Short to Battery or Open; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]

DTC

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

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

DTC Detection Condition Combination Table

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

Ignition switch ON

○

○

Malfunction

Open in evaporator temperature sensor circuit

○

-

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

PROCEDURE

1.

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

(a) Disconnect the m2 evaporator temp. sensor (No. 1 cooler thermistor) connector.

*a

Front view of wire harness connector

(to Evaporator Temp. Sensor (No. 1 Cooler Thermistor))

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

m2-2 - Body ground

Ignition switch ON

0 to 5.5 V
NG

GO TO STEP 5

OK

2.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs

NEXT

3.

CHECK FOR DTC

(a) Turn the ignition switch off.

(b) Disconnect the m2 evaporator temp. sensor (No. 1 cooler thermistor) connector.

*a

Front view of wire harness connector

(to Evaporator Temp. Sensor (No. 1 Cooler Thermistor))

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

*1

Evaporator Temp. Sensor (No. 1 Cooler Thermistor)

*2

Air Conditioning Amplifier Assembly

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

(e) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

P053511 is output

A

P053515 is output

B
A

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

B

4.

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

(a) Remove the air conditioning harness assembly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

m2-2 - m3-6 (TE)

Always

Below 1 Ω

m2-1 - m3-5 (SG-3)

Always

Below 1 Ω
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

5.

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

(a) Remove the air conditioning harness assembly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: DISASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

m2-2 or m3-6 (TE) - Other terminals and body ground

Always

10 kΩ or higher
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY