Component Inspection

Component Inspection

1. Check A/C Control Unit
1. Engine "ON".
2. Disconnect intake actuator.
3. Measure voltage value between terminal "1" of A/C control unit and chassis ground.
A. Specification: 5V




4. Is the measured voltage within specifications ?
YES
1) Go to "Check intake actuator" 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.
2. Check intake actuator.
1. Check actuator motor
(1) Ignition "OFF".
(2) Disconnect intake actuator.
(3) Connect (+) terminal of battery to terminal 3 of intake actuator and (-) terminal to terminal 4
(4) Verify that the actuator operates to the FRE position.
(5) Verify that the temperature actuator operates to the REC position with reverse connecting. ((+) to 4 and (-) to 3)




(6) Dose the actuator work properly ?
YES
1) Go to "Check potentiometer" procedure.
NO
1) Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to "Verification of Vehicle Repair" procedure.
2. Check actuator potentiometer
(1) Ignition "ON".
(2) Connect intake actuator.
(3) Measure voltage between terminal "6" and "7" of intake actuator while operating the intake switch.
A. Specification: Refer the specifications in fig 3)








(4) Is the measured voltage within specifications in fig 3) ?
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 actuator and check for proper operation. If the problem is corrected, replace actuator and then go to "Verification of Vehicle Repair" procedure.