How To Proceed With Troubleshooting

HINT: 

• Use the following procedure to troubleshoot the air conditioning system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT BATTERY VOLTAGE 
   1. Inspect the battery voltage with the power switch off.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

      NEXT: Go to next step 

3. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the LIN communication system is functioning normally.

      Result

      Result	Proceed to
      LIN DTC is not output	A
      LIN DTC is output	B Refer to HOW TO PROCEED WITH TROUBLESHOOTING

      B → GO TO  LIN COMMUNICATION SYSTEM (BASE) (DIAGNOSTICS - INTRODUCTION) 

      A: Go to next step 

4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the CAN communication system is functioning normally.

      Result

      Result	Proceed to
      CAN DTC is not output	A
      CAN DTC is output	B Refer to HOW TO PROCEED WITH TROUBLESHOOTING

      B → GO TO  CAN COMMUNICATION SYSTEM (BASE) (DIAGNOSTICS - INTRODUCTION) 

      A: Go to next step 

5. CHECK FOR DTC* 
   1. Check for DTCs and note any code that is output.
   2. Clear the DTCs.
   3. 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 DTC.

      Result

      Result	Proceed to
      DTC is output	A
      DTC is not output	B

      B → Go to   7 

      A: Go to next step 

6. DIAGNOSTIC TROUBLE CODE CHART 
   1. Find the output code in the diagnostic trouble code chart. Refer to DIAGNOSTIC TROUBLE CODE CHART .

      NEXT → Go to   9 

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .

      Result

      Result	Proceed to
      Fault is not listed in Problem Symptoms Table	A
      Fault is listed in Problem Symptoms Table	B

      B → Go to   9 

      A: Go to next step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Panel diagnosis (indicator check, sensor check). Refer to DIAGNOSIS SYSTEM 
   2. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST 
   3. Terminals of ECU. Refer to TERMINALS OF ECU 
   4. Operation Check. Refer to OPERATION CHECK  (w/ Remote Air Conditioning System))
   5. On-vehicle Inspection
   6. Inspection

      NEXT: Go to next step 

9. ADJUST, REPAIR OR REPLACE 

   NEXT → END