With Navigation System

The purpose of the operational check is to confirm that the system operates properly.

CONDITIONS:
Engine running at normal operating temperature.

PROCEDURE (With navigation system):




1. Check Memory Function
1. Set the temperature 85 °F or 32 °C.
2. Press OFF switch.
3. Turn the ignition off.
4. Turn the ignition on.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press OFF switch.




2. Check Blower
1. Press fan switch (up side) one time.
Blower should operate on low speed.
The fan symbol should have one blade lit.
2. Press fan switch (up side) one more time, and continue checking blower speed and fan symbol until all speeds are checked.
3. Leave blower on MAX speed.

3. Check Discharge Air




1. Press MODE switch four times and DEF button.




2. Each position indicator should change shape.
3. Confirm that discharge air comes out according to the air distribution table.
Refer to "Discharge Air Flow".

NOTE: Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH when the DEF is selected. Intake door position is checked in the next step.




4. Check Recirculation
1. Press REC switch.
Recirculation indicator should illuminate.
2. Listen for intake door position change (you should hear blower sound change slightly).




5. Check Temperature Decrease
- Turn the temperature dial counterclockwise until 18 °C (65 °F) is displayed.
- Check for cold air at discharge air outlets.




6. Check Temperature Increase
- Turn the temperature dial clockwise until 32 °C (85 °F) is displayed.
- Check for hot air at discharge air outlets.




7. Check ECON (Economy) Mode
1. Set the temperature 75 °F or 25 °C.
2. Press ECON switch.
3. Display should indicate ECON (no AUTO).
Confirm that the compressor clutch is not engaged (visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)




8. Check AUTO Mode
1. Press AUTO switch.
2. Display should indicate AUTO (no ECON).
Confirm that the compressor clutch engages (audio or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)




9. Check Ambient Display
1. Press AUTO switch.
2. Press AMB switch.
3. Display should show the outside (ambient) temperature for approximately 5 seconds.

If all operational check are OK (symptom can not be duplicated), go to "Incident Simulation Tests" and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to "Symptom Chart" and perform applicable trouble diagnosis procedures.