Operational Check

Operational Check
The purpose of the operational check is to confirm that the system operates as it should. The Systems which are checked are the front blower, mode (discharge air), intake air, temperature decrease, temperature increase, compressor, AUTOMATIC mode, memory function, and rear blower.

CONDITIONS:
Engine running at normal operating temperature.

PROCEDURE:




1. Check Front Blower
1. Press any mode switch except OFF.
2. Rotate the front fan switch up and check for blower operation (Fan symbol lit in display screen).
3. Continue checking that blower speed increases as the front fan switch is rotated up.
4. Leave blower on HI speed.
If NG, go to "Memory Function".
If OK, continue with the next check.

2. Check Discharge Air




1. Press each mode switch.




2. Confirm that discharge air comes out according to the air distribution table and that the indicator lamp illuminates.
Refer to "Discharge Air Flow" in "DESCRIPTION".
If NG, refer to "Mode Door".
If OK, continue with the next check.

NOTE: Confirm that the compressor clutch is engaged (visual inspection).




3. Check MAX A/C (Recirculation)
1. Press MAX A/C switch. MAX A/C indicator should illuminate.
2. Listen for intake door position change (you should hear blower sound change slightly).
If NG, refer to "Intake Door".
If OK, continue with the next check.

NOTE: MAX A/C operates in FACE mode only.




4. Check Temperature Decrease
1. Press the temperature control switch until [16 °C (60 °F)] is displayed.
2. Check for cold air at discharge air outlets.
If NG, refer to "Insufficient Cooling".
If OK, continue with the next check.




5. Check Temperature Increase
1. Press the temperature control switch until [32 °C (90 °F)] is displayed.
2. Check for hot air at discharge air outlets.
If NG, refer to "Insufficient Heating".
If OK, continue with the next check.




6. Check A/C Switch
1. Press any mode switch.
2. Press the A/C switch.
A/C indicator should illuminate.
3. Confirm that the compressor clutch engages (audio or visual inspection).
4. Check for cold air at the appropriate discharge air outlets.
If NG, refer to "A/C System".
If OK, continue with the next check.




7. Check AUTOMATIC Mode
1. Press the AUTOMATIC switch.
2. Display should indicate AUTOMATIC [no fan symbol (31) displayed].
3. Confirm that the compressor clutch engages (audio or visual inspection).
(Discharge air will depend on ambient, in-vehicle, and set temperatures.)
If NG, refer to "A/C System".
If OK, continue with the next check.




8. Check Memory Function
1. Press the OFF switch.
2. Turn the ignition OFF.
3. Turn the ignition ON.
4. Press the AUTOMATIC switch.
5. Confirm that the set temperature remains at previous temperature.
If NG, refer to "Memory Function".
If OK, continue with the next check.

9. Check Rear Blower




1. Set rear fan switch (front) to REAR position.
2. Press any mode switch except OFF.
3. Press air conditioner switch ON.
4. Turn rear fan switch to 1-speed.
Blower should operate on 1-speed.
5. Confirm air flow from the rear discharge air outlets.
6. Turn rear fan switch to 2-speed.
7. Continue checking blower speed until all four speeds are checked.




8. Turn rear fan switch (rear) to 0 (OFF)
9. Set rear fan switch (front) to 1-speed. Blower should operate on 1-speed.
10. Turn rear fan switch (front) to 2-speed.
11. Continue checking blower speed until all four speeds are checked.
If NG, refer to "Rear Blower".
If OK, continue with the next check.
If all operation checks are OK (symptom cannot be duplicated), refer to "Incident Simulation Tests", and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to "Symptom Chart" and perform the applicable trouble diagnosis procedure.