EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER]

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Note

•  When inspecting the evaporator temperature sensor, inspect it when it is installed to the A/C unit.

Function Inspection

1.  Perform the following procedure so that the ambient temperature of the evaporator temperature sensor is close to the cabin temperature.

•  Switch the main power ON (READY on).

•  Set airflow volume to maximum.

•  Set the temperature to MAX COLD.

•  Touch the A/C icon to turn the A/C off.

•  Set the air intake mode to REC.

•  Fully close all the doors and the door glass.

•  Leave for 5 min.

2.  Connect the M-MDS to the DLC-2.

3.  Switch the main power OFF.

4.  Display the dash-electrical supply unit PIDs [EVA_TMP] and [AMB_TEMP_INTERNAL]. (See PID/DATA MONITOR INSPECTION.)

5.  Compare the temperature displays of the PIDs [EVA_TMP] and [AMB_TEMP_INTERNAL].

•  If the temperature displays of the PIDs [EVA_TMP] and [AMB_TEMP_INTERNAL]. do not match, perform the procedure from Step 6.

6.  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.)

7.  Remove the following parts.

(1)  Glove compartment(See GLOVE COMPARTMENT REMOVAL/INSTALLATION [(E)].)

(2)  Front passenger's side wall (See SIDE WALL REMOVAL/INSTALLATION.)

8.  Connect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.)

9.  Perform the following procedure so that the ambient temperature of the evaporator temperature sensor is close to the cabin temperature.

•  Switch the main power ON (READY on).

•  Set airflow volume to maximum.

•  Set the temperature to MAX COLD.

•  Touch the A/C icon to turn the A/C off.

•  Set the air intake mode to REC.

•  Fully close all the doors and the door glass.

•  Leave for 5 min.

10.  Measure the temperature of the air intake port.

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11.  Connect the M-MDS to the DLC-2.

12.  Switch the main power ON (READY off).

13.  Display the dash-electrical supply unit PID [EVA_TMP]. (See PID/DATA MONITOR INSPECTION.)

14.  Compare the measured temperature with the temperature display of the dash-electrical supply unit PID [EVA_TMP].

•  If it does not match the measured temperature, perform the resistance inspection. (See Resistance Inspection.)

Resistance Inspection

1.  Perform the following procedure so that the ambient temperature of the evaporator temperature sensor is close to the cabin temperature.

•  Switch the main power ON (READY on).

•  Set airflow volume to maximum.

•  Set the temperature to MAX COLD.

•  Touch the A/C icon to turn the A/C off.

•  Set the air intake mode to REC.

•  Fully close all the doors and the door glass.

•  Leave for 5 min.

2.  Switch the main power OFF.

3.  Disconnect the negative lead-acid battery terminal. (See NEGATIVE LEAD-ACID BATTERY TERMINAL DISCONNECTION/CONNECTION.)

4.  Disconnect the evaporator temperature sensor connector.

5.  Measure the temperature of the air intake port.

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6.  Measure the resistance between evaporator temperature sensor terminals A and B.

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•  If the characteristics of the evaporator temperature sensor are not as shown in the graph, replace the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

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