How To Proceed With Troubleshooting

AIR CONDITIONING: AIR CONDITIONING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the air conditioning system.
- *: Use a Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK
NEXT -- Continue to next step.
3. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
4. CHECK CAN COMMUNICATION SYSTEM*
(a) Use a Techstream to check if the CAN communication system is functioning.
Result:






B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.
5. CHECK DTC*
(a) Check for DTCs and write down any DTCs that are output.
(b) Clear the DTCs.
(c) Referring to the DTCs written above, simulate the DTC output conditions and check whether any DTCs of the air conditioning system recur.
Result:






B -- GO TO STEP 8
A -- Continue to next step.
6. REFER TO PROBLEM SYMPTOMS TABLE
Symptom Related Diagnostic Procedures






B -- GO TO STEP 8
A -- Continue to next step.
7. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Data List / Active Test Scan Tool Testing and Procedures.
(b) Terminals of ECU Pinout Values and Diagnostic Parameters.
NEXT -- Continue to next step.
8. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
9. CONFIRMATION TEST
NEXT -- END