RM38T0EC _58 Vehicle Interior _104612 HEATING / AIR CONDITIONING _0601796 AIR CONDITIONING SYSTEM(for HEV Model) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HEV Model)  P007015  Ambient Temperature Sensor Circuit Short to Battery or Open  


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 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

E368742E97
0.615,1.781 1.167,2.031 0.552,0.25 10 false A174 0.604,1.958 2,2.156 1.396,0.198 10 false Thermistor Assembly 4.646,1.771 4.979,1.969 0.333,0.198 10 false I48 4.656,1.938 7.146,2.125 2.49,0.188 10 false Air Conditioning Amplifier Assembly 2.146,0.688 2.323,0.906 0.177,0.219 10 false 1 2.146,1.167 2.323,1.385 0.177,0.219 10 false 2 4.563,1.156 4.76,1.333 0.198,0.177 10 false 14 4.625,0.677 4.813,0.865 0.188,0.188 10 false 1 4.813,0.677 5.25,0.865 0.438,0.188 10 false TAM 4.802,1.156 5.208,1.344 0.406,0.188 10 false SG-2 5.656,0.271 5.906,0.458 0.25,0.188 10 false 5 V 6.26,0.781 6.51,0.969 0.25,0.188 10 false AD

PROCEDURE

1.CHECK THERMISTOR ASSEMBLY CIRCUIT
a.

Disconnect the A174 thermistor assembly connector.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A174-1 - Body ground Ignition switch ON 0 to 5.5 V



Result:
Proceed to
OK
NG



OK

2.CLEAR DTC

NG

5.CHECK HARNESS AND CONNECTOR (THERMISTOR ASSEMBLY - COMBINATION METER ASSEMBLY)
2.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs
50002 450

Result:
Proceed to
NEXT



NEXT

3.CHECK FOR DTC
3.CHECK FOR DTC
a.

Turn the ignition switch off.


b.

Connect terminals 1 and 2 of the thermistor assembly connector on the wire harness side.

E548990
4.427,1.271 4.896,1.521 0.469,0.25 1.094,2.042 1.417,2.344 0.323,0.302 10 false *1 3.104,2.031 3.427,2.333 0.323,0.302 10 false *2 4.802,0.531 5.125,0.833 0.323,0.302 10 false *a 2.479,1.01 2.865,1.281 0.385,0.271 10 false TAM 4.51,1.302 5.125,1.656 0.615,0.354 10 false A174 2.448,1.406 2.854,1.667 0.406,0.26 10 false SG-2
*1 Thermistor Assembly *2 Air Conditioning Amplifier Assembly
*a Front view of wire harness connector
(to Thermistor Assembly) 		- -



c.

Turn the ignition switch to ON and wait for 4 seconds or more.


d.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450
Result:
Result Proceed to
P007011 is output A
P007015 is output B




A

REPLACE THERMISTOR ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AMBIENT TEMPERATURE SENSOR>REMOVAL


B

4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - THERMISTOR ASSEMBLY)
4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - THERMISTOR ASSEMBLY)
a.

Disconnect the I48 air conditioning amplifier assembly connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
I48-1 (TAM) - A174-1 Always Below 1 Ω
I48-14 (SG-2) - A174-2 Always Below 1 Ω



c.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch 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



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (THERMISTOR ASSEMBLY - COMBINATION METER ASSEMBLY)
a.

Disconnect the I48 air conditioning amplifier assembly connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A174-1 or I48-1 (TAM) - Other terminals and body ground Always 10 kΩ or higher


Result:
Proceed to
OK
NG




OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR