Component Inspection

Component Inspection

1.Check Ambient sensor
1. Ignition "OFF".
2. Disconnect ambient sensor.
3. Measure resistance between terminal "1" and "2" of ambient sensor.
A. Specification : Refer the specifications in fig 3)








4. Is the measured resistance within specifications in fig 3) ? (tolerance limits ±3%)
YES
1) Go to "Check A/C Control Unit" procedure.
NO
1) Substitute with a known-good ambient sensor and check for proper operation.
If the problem is corrected, replace ambient sensor and then go to "Verification of Vehicle Repair" procedure.
2. Check A/C Control Unit
1. Engine : "ON".
2. Disconnect ambient sensor.
3. Measure voltage between terminal "12" 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.