Diagnostic Trouble Code (DTC) table
Note. The following table lists all malfunctions that can be recognized by the instrument cluster and printed out by the VAG 1551 scan tool. The malfunctions are listed in order according to their 5-digit numbers. DTC numbers appear only on the print-out. Before replacing a component shown as faulty, check the wiring and connections to the component as well as the Ground (GND) connections according to wiring diagram. After repairs and function test of the system, DTC memory must always be checked again using the VAG 1551 scan tool and erased. DTC memory records all static and sporadic malfunctions: If a malfunction occurs and persists for at least 2 seconds, it is identified as a static malfunction (outside temperature malfunction at least 60 seconds, coolant temperature sensor only after at least 30 minutes with engine running). If a malfunction does not occur again, it is registered as sporadic. "ISP" will appear at right on scan tool display. When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will only register as static malfunctions if they still occur after testing. Sporadic malfunctions which no longer occur after 50 driving cycles (ignition on at least 5 minutes, vehicle speed above 30 km/h) are erased automatically.
Scheme 12
Note. In the previous graphic refer to: AUTOMATIC CLIMATE CONTROL SYSTEM, ON BOARD DIAGNOSTIC (OBD) for A/C system OBD.
Scheme 13
Scheme 14
Scheme 15
Note. In the previous graphic refer to: MEASURING VALUE BLOCK 140 for control module is not displayed and is not indicated with a "1" in measuring value block ADAPTATION VALUE for inputting the correct adaptation value
Scheme 16
Note. In the previous graphic refer to: MEASURING VALUE BLOCK 140 for control module is not indicated with a "1" in measuring value block. ADAPATATION VALUE for inputting the correct adaptation value DATA EXCHANGE BETWEEN CONTROL MODULES, CHECKING for checking data exchange
Scheme 17
Note. In the previous graphic refer to: MEASURING VALUE BLOCK 125 for CAN capable control module and Engine Control Module is not indicated with a "1" in the measuring value block ADAPTATION VALUE for inputting the correct adaptation value
Scheme 18
Note. In the previous graphic refer to: MEASURING VALUE BLOCK 125 for TCM is not indicated with a "1" in the measuring value block MEASURING VALUE BLOCK 126 for Climatronic control module is not indicated with a "1" in the measuring value block ADAPTATION VALUE for inputting the correct adaptation value
Scheme 19
Note. In the previous graphic refer to: MEASURING VALUE BLOCK 130 for control module is not indicated with a "1" in measuring value block ADAPTATION VALUE for inputting the correct adaptation value. DATA EXCHANGE BETWEEN CONTROL MODULES, CHECKING for checking data exchange.
Scheme 20
Note. In the previous graphic refer to: INSTRUMENT CLUSTER, REMOVING AND INSTALLING for replacing instrument cluster.