DIAGNOSIS
If the windshield wiper ECU detects a malfunction in the washer system, it stores 5-sigit DTC (Diagnostic Trouble Code) in memory.
When the rain sensor detects a malfunction, it stores 5-digit DTC (Diagnostic Trouble Code) in memory.
The 5-digit DTC can be read by connecting a Global TechStream (GTS) to the DLC3.