CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the air conditioning system.
- *: Use the Techstream.
PROCEDURE |
1. | VEHICLE BROUGHT TO WORKSHOP |
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NEXT |
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| 2. |
CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, confirm that the problem symptoms have been
accurately identified. Preconceptions should be discarded in order to
make an accurate judgment. To clearly understand what the problem
symptoms are, it is extremely important to ask the customer about the
problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
- The following 5 items are important points for problem analysis:
|
What |
Vehicle model, system name |
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When |
Date, time, occurrence frequency |
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Where |
Road conditions |
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Under what conditions? |
Driving conditions, weather conditions |
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How did it happen? |
Problem symptoms |
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NEXT | |
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| 3. |
INSPECT BATTERY VOLTAGE | (a) Inspect the battery voltage.
Standard Voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
(b) Check the fuses and relays. (c)
Check the connector connections and terminals to make sure that there
are no abnormalities such as loose connections, deformation, etc.
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NEXT | |
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| 4. |
CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check for CAN communication system DTCs. Click here
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Result | Proceed to | |
CAN communication system DTCs are not output |
A | | CAN communication system DTCs are output |
B |
| B |
 | GO TO CAN COMMUNICATION SYSTEM |
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A | |
| |
(a) Check for DTCs and note any codes that are output. Body Electrical > Air Conditioner > Trouble Codes
(b) Clear the DTCs. Body Electrical > Air Conditioner > Clear DTCs
(c)
Recheck for DTCs. Based on the DTCs output above, try to force output
of the air conditioning system DTC by simulating the operation indicated
by the DTC. Body Electrical > Air Conditioner > Trouble Codes
|
Result | Proceed to | |
DTCs are not output | A | |
DTCs are output | B |
| B |
| GO TO DIAGNOSTIC TROUBLE CODE CHART |
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A | |
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| 6. |
CHECK AIR CONDITIONING CONTROL PANEL (RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a)
Operate each switch on the air conditioning control panel (radio and
display receiver assembly) and check that the switches of the air
conditioning system operate normally.
| NG |
| GO TO PROBLEM SYMPTOMS TABLE |
|
OK | |
| |
(a)
Operate the blower switch on the air conditioning control panel (radio
and display receiver assembly) and check that the blower control
operates normally. | NG |
| GO TO PROBLEM SYMPTOMS TABLE |
|
OK | |
| |
| 8. |
CHECK AIR INLET CONTROL | (a)
Operate the recirculation/fresh switch on the air conditioning control
panel (radio and display receiver assembly) and check that the air inlet
control operates normally.
| NG | |
GO TO PROBLEM SYMPTOMS TABLE |
|
OK | |
| |
| 9. |
CHECK AIR OUTLET CONTROL | (a)
Operate the air outlet mode switch on the air conditioning control
panel (radio and display receiver assembly) and check that the air
outlet control operates normally.
| NG | |
GO TO PROBLEM SYMPTOMS TABLE |
|
OK | |
| |
| 10. |
CHECK COOLING FUNCTION | (a)
Operate the temperature adjustment switches on the air conditioning
control panel (radio and display receiver assembly) and check that cool
air is blown from the registers.
| NG | |
GO TO PROBLEM SYMPTOMS TABLE |
|
OK | |
| |
| 11. |
CHECK HEATER FUNCTION | (a)
Operate the temperature adjustment switches on the air conditioning
control panel (radio and display receiver assembly) and check that warm
air is blown from the registers.
| NG | |
GO TO PROBLEM SYMPTOMS TABLE |
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OK | |
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| 12. |
USE SIMULATION METHOD TO CHECK | Click here
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NEXT | |
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| NEXT |
| END | | 
