How to Proceed With Troubleshooting

Perform Troubleshooting In Accordance With The Procedure On The Chart.

[1] Customer Problem Analysis
Using the customer problem analysis check sheet for reference, ask the customer in as much detail as possible about the problem. A subjective complaint such as "poor air conditioning efficiency" is also considered in the air conditioning complaints.Therefore, in "Customer Problem Analysis" and "Problem Symptom Confirmation", check carefully to determine whether the level of performance is the actual (normal) level or whether it is abnormal. Then perform troubleshoot accordingly.

[2] Check And Clear The Diagnostic Trouble Codes (Precheck)
First check the diagnostic trouble codes to see if there are any malfunction codes stored in memory. If there are malfunction codes, make a note of them, then clear them and proceed to "[3] problem Symptom Confirmation".

[3] Problem Symptom Confirmation
Confirm the problem symptoms.

[4] Symptom Simulation
If the problem does not reappear, be sure to simulate the problem by mainly checking the circuits indicated by the diagnostic trouble code in step [2], using "Problem Simulation Method".

[5] Diagnostic Trouble Code Check
Check the diagnostic trouble codes. Check for problems with the sensors or the wire harness.

[6] Diagnostic Trouble Code Chart
If a malfunction code is confirmed in the diagnostic trouble code check, proceed to the check procedure indicated by the matrix chart for each diagnostic trouble code.

[7] Matrix Chart Of Problem Symptoms
If the normal code is confirmed in the diagnostic trouble code check, perform inspection in accordance with the inspection order in the matrix chart of problem symptoms.

[8] Circuit Inspection
Proceed with diagnosis of each circuit in accordance with the inspection order confirmed in and Determine whether the cause of the problem is in the sensor, actuators, wire harness and connectors, or the ECU.

[9] Actuator Check
Check actuators for proper operation. Instructions for this diagnosis are given in the flow chart for each circuit.

[10] Repairs
After the cause of the problem is located, perform repairs by following the inspection and replacement procedures in this manual.

[11] Confirmation Test
After completing repairs, confirm not only that the malfunction is eliminated, but also perform diagnostic trouble code check and actuator check, etc. again to make sure the entire air conditioning system is operating correctly.