Toyota Corolla Cross: Ambient Temperature Sensor Circuit Short to Battery or Open (P007015)
DESCRIPTION
The thermistor assembly is installed in front of the cooler condenser assembly to detect the ambient temperature, which is used to control the air conditioning system. This sensor is connected to the air conditioning amplifier assembly and detects fluctuations in the ambient temperature. This data is used for controlling the cabin temperature. The sensor sends a signal to the air conditioning amplifier assembly. The resistance of the thermistor assembly changes in accordance with the ambient temperature. 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 thermistor assembly and reads voltage changes due to changes in the resistance of the thermistor assembly.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Memory |
|---|---|---|---|---|
| P007015 |
Ambient Temperature Sensor Circuit Short to Battery or Open |
Diagnosis Condition:
Malfunction:
Detection Time:
|
| Memorized |
|
Vehicle Condition | |||
|---|---|---|---|
|
Pattern 1 | Pattern 2 | ||
|
Diagnosis Condition | Ignition switch ON |
○ | ○ |
|
Malfunction | Open in ambient temperature sensor circuit |
○ | - |
|
Short (+B) in ambient 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
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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 |
|---|---|---|---|---|
|
Ambient Temperature Sensor |
Thermistor assembly | -327.68 to 327.67 °C |
Actual ambient temperature displayed |
Thermistor assembly circuit malfunction |
|
Tester Display |
|---|
| Ambient Temperature Sensor |
OK:
The display is as specified in the normal condition column.
| OK | .gif) | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
|
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| 2. |
INSPECT THERMISTOR ASSEMBLY |
Click here
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| NG | |
REPLACE THERMISTOR ASSEMBLY |
|
| 3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - THERMISTOR ASSEMBLY) |
(a) Disconnect the I48 air conditioning amplifier assembly connector.
(b) Disconnect the A3 thermistor assembly connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
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(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I48-1 (TAM) - Body ground |
Ignition switch ON | Below 1 V |
|
I48-14 (SG-2) - Body ground |
Ignition switch ON | Below 1 V |
| OK | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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