| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026Z4A |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): P053511; Evaporator Temperature Sensor Circuit Short to Ground; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
DTC |
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 (5 V) 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:
Malfunction:
Detection Time:
|
|
Memorized |
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Air Conditioner > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Evaporator Fin Thermistor |
Evaporator temp. sensor (No. 1 cooler thermistor) |
-327.68 to 327.67°C |
Actual evaporator temperature displayed |
Evaporator temp. sensor (No. 1 cooler thermistor) circuit malfunction |
Body Electrical > Air Conditioner > Data List
|
Tester Display |
|---|
|
Evaporator Fin Thermistor |
OK:
The display is as specified in the normal condition column.
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
|
|
|
2. |
INSPECT EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR) |
Click here
![2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - ]; HEATING / AIR CONDITIONING: FRONT EVAPORATOR TEMPERATURE SENSOR: INSPECTION](/t3Portal/stylegraphics/info.gif)
| NG |
|
REPLACE EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR)
|
|
|
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 here
(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 |
|
m2-1 or m3-5 (SG-3) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
|
| NG |
|
|
|