10-16 A/C system 10. A/C and Safety System 10.1.10 A/C components 10.1.10.1 Fault diagnosis 1 Diagnostic instructions The DTC can be read via the OBD DLC with the scan tool. With the use of AC data sheet and reading of data sheet displayed on the scan tool, the function of reading switches and sensorcan be performed without the disassembly of any parts. Reading the data sheet is the first step in troubleshooting and one way to reduce diagnostic time. 2 Visual inspection 1. Confirm the fault symptoms The most difficult situation in troubleshooting is when no symptoms appear, in which case the user-described fault must be thoroughly analyzed.
In addition, you need to simulate the same or similar conditions and environments as when the customer's vehicle fails. If you begin to troubleshoot without confirming the symptoms of the fault, something important will be ignored during repair and wrong guesses may be put forward somewhere no matter how experienced and skilled the maintenance personnel are. This will make troubleshooting impossible. 2. Check easily accessible or visible system assembly for obvious damage or conditions that could cause a fault. 3. The connector joint and the fulcrum of vibration shall be the main parts that need to be thoroughly checked.
If there is a possibility of fault due to vibration, it is recommended to use the vibration method. a Gently vibrate the potentially faulty sensor part with your finger and check for faults. b Gently rock the connection vertically and horizontally c Gently rock the harness vertically and horizontally. VOYAH FREE