Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Ambient Temperature Sensor Circuit Short to Battery or Open (P007015)

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Gasoline Model With Manual Air Conditioning System) / 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:

  • Ignition switch ON

Malfunction:

  • Open or short (+B) in ambient temperature sensor circuit

Detection Time:

  • Continuously for 4 seconds or more
  • Thermistor assembly
  • Harness or connector
  • Air conditioning amplifier assembly

Memorized
DTC Detection Condition Combination Table
 

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

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
Body Electrical > Air Conditioner > Data List

Tester Display

Ambient Temperature Sensor

OK:

The display is as specified in the normal condition column.

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

2.

INSPECT THERMISTOR ASSEMBLY

Click here

NG

REPLACE THERMISTOR ASSEMBLY

OK

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:

Tester Connection

Condition

Specified Condition

I48-1 (TAM) - A3-1

Always

Below 1 Ω

I48-14 (SG-2) - A3-2

Always

Below 1 Ω

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

(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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