How to Proceed with Troubleshooting

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): HOW TO PROCEED WITH TROUBLESHOOTING

HINT
* Use the following procedures to troubleshoot the air conditioning system.
* *: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. INSPECT BATTERY VOLTAGE

(a) Inspect the battery voltage.

Standard Voltage:

11 to 14 V

(a) If the voltage is below 11 V, recharge or replace the battery before proceeding.

NEXT -- Continue to next step.

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN Communication System is functioning normally.

Result:





B -- Go to CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

4. CHECK FOR DTC*

(a) Check for DTCs and write down any codes that are output.

HINT
Refer to DTC Check / Clear Air Conditioning System (for Automatic Air Conditioning System)

(b) Clear the DTCs.

(c) Recheck for DTCs. Based on the DTCs output above, try to force the A/C system to output DTCs by simulating the conditions indicated by the DTCs.

Result:





B -- GO TO STEP 7
A -- Continue to next step.

5. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Air Conditioning System (For Automatic Air Conditioning System).

Result:





B -- GO TO STEP 7
A -- Continue to next step.

6. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Actuator Check Actuator Check

(b) Data List / Active Test Air Conditioning System (for Automatic Air Conditioning System)

(c) Terminals of ECU Air Conditioning System (for Automatic Air Conditioning System)

(d) On-vehicle Inspection

(e) Inspection

NEXT -- Continue to next step.

7. ADJUST, REPAIR OR REPLACE

NEXT -- END