| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026Z4B |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): P053515; Evaporator Temperature Sensor Circuit Short to Battery or Open; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
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:
Malfunction:
Detection Time:
|
|
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. |
|
(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 |
|
|
|
2. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Air Conditioner > Clear DTCs
|
|
3. |
CHECK FOR DTC |
(a) Turn the ignition switch off.
|
(b) Disconnect the m2 evaporator temp. sensor (No. 1 cooler thermistor) connector. |
|
|
(c) Connect terminals 1 and 2 of the evaporator temp. sensor (No. 1 cooler thermistor) connector on the wire harness side. |
|
(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)
|
|
|
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](/t3Portal/stylegraphics/info.gif)
(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 |
|
|
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
(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 |
|
|
|