Impala V6-3.8L VIN K (2004)
Steps 30 - 35
The numbers below refer to the step numbers on the diagnostic table.
2. A partial malfunction in the class 2 serial data circuit uses a different procedure from a total malfunction of the class 2 serial data circuit. The
following modules communicate on the class 2 serial data circuit:
-
Auxiliary Power Drop Connector
-
BCM
-
DIC
-
EBCM
-
IPC
-
PCM
-
Radio
-
OnStar (UE1)
-
SDM
3. The following DTC's may be retrieved with a history status, but are not the cause of the present condition:
-
U1300
-
U1301
-
U1305
6. A State of Health DTC with a history status may be present along with a U1000 or U1255 having a current status. This indicates that the
malfunction occurred when the ignition was ON.
7. Data link connector terminals 2 and 5 provide the connection to the class 2 serial data circuit and the signal ground circuit respectively.