On Board Diagnostic (OBD II): Function

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

The Motronic Engine Control Module (ECM) - J220- for the fuel injection and ignition system is equipped with a Diagnostic Trouble Code (DTC) memory.

If malfunctions occur in the sensors and components being monitored, they will be stored in the DTC memory together with an indication of the type of malfunction.

The stored malfunctions are displayed after initiating the malfunction display: see CHECK DTC MEMORY (SCAN TOOL FUNCTION 02) .

After malfunctions have been eliminated, DTC memory must be erased (see ERASE DTC MEMORY (SCAN TOOL FUNCTION 05) ). The repair must be verified via the appropriate display group, see READINESS CODE, CREATING .

The readiness code must be created again after every time the DTC memory is erased and when the voltage supply to ECM -J220- is interrupted: see READINESS CODE, CREATING .