Component Inspection

Air Conditioner
B1233 In-car temperature sensor short (Low) - Inspection/Repair:_:Component Inspection

Component Inspection

1. Check Incar Temp. sensor
1. Ignition "OFF".
2. Disconnect incar sensor.
3. Measure resistance between terminal "4" and "2" of incar sensor.
A. Specification : Refer the specifications in fig3)








4. Is the measured resistance within specifications in fig3)? (tolerance limits ±3%)
YES
1) Go to "Check A/C Control Unit" procedure.
NO
1) Substitute with a known-good incar sensor and check for proper operation.
If the problem is corrected, replace incar sensor and then go to "Verification of Vehicle Repair" procedure.
2. Check A/C Control Unit
1. Engine "ON".
2. Disconnect incar sensor.
3. Measure Voltage between terminal "8" of A/C Control Unit and chassis ground.
A. Specification : Approx. 5V




4. Is the measured voltage within specifications?
YES
1) Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good A/C Control Unit and check for proper operation.
If the problem is corrected, replace A/C Control Unit and then go to "Verification of Vehicle Repair" procedure.