B2578
B2578, B2579 IN-VEHICLE SENSORDescription
In-vehicle Sensor
The in-vehicle sensor (1) is located on instrument lower cover. It converts variations in temperature of compartment air drawn from the aspirator into a resistance value. It is then input into the auto amp.
In-vehicle Sensor Circuit
Aspirator
The aspirator (1) is located on driver's side of Heater & cooling unit assembly. It produces vacuum pressure due to air discharged from the heater & cooling unit assembly, continuously taking compartment air in the aspirator.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
Step 1-2:
Diagnosis Procedure
Step 1-3:
Step 3 (Continued)-4:
Component Inspection
After disconnecting in-vehicle sensor (1) connector M34, measure resistance between terminals 1 and 2 at sensor side. Refer to table given.
If NG, replace in-vehicle sensor.