HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Gasoline Model) P053515 Evaporator Temperature Sensor Circuit Short to Battery or Open
DESCRIPTION
The 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 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 No. 1 cooler thermistor and reads voltage changes as the resistance of the No. 1 cooler thermistor changes.
| 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 Status:
Open or short to +B in evaporator temperature sensor circuit Detection Time:
Continuously for 4 seconds or more |
·
No. 1 cooler thermistor ·
Air conditioning harness assembly ·
Air conditioning amplifier assembly |
Memorized |
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | Ignition switch ON | ○ | ○ |
| Malfunction | Open in evaporator temperature sensor circuit | ○ | - |
| Short to +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
Pre-procedure1
| *a | Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor) |
Disconnect the No. 1 cooler thermistor connector.
Procedure1
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C-2 - Body ground Ignition switch ON 0 to 5.5 V
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG
Pre-procedure1
Disconnect the No. 1 cooler thermistor connector.
Connect terminals 1 and 2 of the No. 1 cooler thermistor on the air conditioning harness assembly side.
| *1 | No. 1 Cooler Thermistor | *2 | Air Conditioning Amplifier Assembly |
| *a | Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor) |
- | - |
Procedure1
According to the display on the GTS, read the Data List.
- Body Electrical > Air Conditioner > Data List
-
Tester Display Evaporator Fin Thermistor - 50003 450 105
- OK:
GTS Display Specified Condition Evaporator Fin Thermistor 327.67°C (621.81°F)
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG
Pre-procedure1
Remove the air conditioning harness assembly.
- HINT:
| *a | Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly) |
*b | Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor) |
Procedure1
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C-1 - z11-5 (SGA) Always Below 1 Ω C-2 - z11-6 (TEA) Always Below 1 Ω
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG
Pre-procedure1
Remove the air conditioning harness assembly.
- HINT:
| *a | Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly) |
*b | Front view of air conditioning harness assembly connector
(to No. 1 Cooler Thermistor) |
Procedure1
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C-2 or z11-6(TEA) - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
Post-procedure1
None
OK
NG