With 7 Inch Display

B2578, B2579 IN-VEHICLE SENSOR

Description


IN-VEHICLE SENSOR






- The in-vehicle sensor (1) is installed to the instrument lower panel
LH.
- The in-vehicle sensor converts the interior air temperature of the passenger room sucked by the aspirator detected with the thermistor into the voltage, and the A/C auto amp. inputs this voltage.

ASPIRATOR






The aspirator (1) generates the vacuum by the air blown from the heater & cooling unit and draws the air of the passenger room to the in-vehicle sensor area via the aspirator duct.






INTERIOR AIR TEMPERATURE CORRECTION

- The A/C auto amp. inputs the temperature detected with the in-vehicle sensor as the interior air temperature.
- Perform the correction of the temperature detected with the in-vehicle sensor for each air conditioning control.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Perform the "SELF-DIAGNOSIS".
2.Check if any DTC is detected in the self-diagnostic results.
NOTE:
If DTC is displayed along with DTC "U1000" or "U1010", first diagnose the DTC "U1000" or "U1010". Refer to
With 7 Inch Display or With 7 Inch Display.
Is DTC "B2578" or "B2579" displayed?
YES- Perform the diagnosis for the in-vehicle sensor. .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK IN-VEHICLE SENSOR POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect the in-vehicle sensor connector.
3.Turn the ignition switch ON.
4.Check voltage between in-vehicle sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.

2. CHECK IN-VEHICLE SENSOR CIRCUIT CONTINUITY-

1.Turn the ignition switch OFF.
2.Disconnect the A/C auto amp. connector.
3.Check for continuity between the in-vehicle sensor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair the harnesses or connectors.

3. CHECK IN-VEHICLE SENSOR

Check the in-vehicle sensor components. .
Is the inspection result normal?
YES- Replace the A/C auto amp.
NO- Replace the in-vehicle sensor.

4. CHECK IN-VEHICLE SENSOR CIRCUIT CONTINUITY

1.Turn the ignition switch OFF.
2.Disconnect the A/C auto amp. connector.
3.Check for continuity between the in-vehicle sensor harness connector and A/C auto amp. harness connector.





4.Check for continuity between in-vehicle sensor harness connector and ground.





Is the inspection result normal?
YES- Replace the A/C auto amp.
NO- Repair the harnesses or connectors.


Component Inspection


1. CHECK IN-VEHICLE SENSOR

1.Turn the ignition switch OFF.
2.Remove the in-vehicle sensor. With 7 Inch Display.
3.Check the resistance between the in-vehicle sensor terminals. Refer to the applicable table for the normal value.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace the in-vehicle sensor.