How to Proceed with Troubleshooting
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): HOW TO PROCEED WITH TROUBLESHOOTING
HINT
* Use these procedures to troubleshoot the air conditioning system.
* *: Use the 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 the Techstream to check if the CAN communication system is functioning.
Result:
B -- Go to CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.
5. CHECK DTC OR CHECK SENSOR CHECK CODE THROUGH PANEL DIAGNOSIS*
(a) Check DTCs or sensor check codes.
(1) Write down the DTCs or sensor check codes.
(b) Clear the DTCs or sensor check codes.
(c) Check whether the DTCs or sensor check codes recur.
(1) Reproduce the problem symptoms in accordance with the DTCs or sensor check codes that were written down, and check whether the DTCs or sensor check codes recur.
HINT
Refer to the DTC chart when any DTCs or sensor check codes are output.
Result:
B -- Go to DIAGNOSTIC TROUBLE CODE CHART Air Conditioning System (for Automatic Air Conditioning System)
A -- Continue to next step.
6. REFER TO PROBLEM SYMPTOMS TABLE
Result:
B -- ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
A -- Continue to next step.
7. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) DATA LIST / ACTIVE TEST Data List / Active Test
(b) Panel diagnosis (indicator check) Check Mode Procedure
(c) Panel diagnosis (sensor check) Check Mode Procedure
(d) Panel diagnosis (actuator check) Check Mode Procedure
(e) Terminals of ECU Air Conditioning System (for Automatic Air Conditioning System)
NEXT -- Continue to next step.
8. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
9. CONFIRMATION TEST
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