CTS V8-5.7L VIN P (2004)
Steps 12 - 13
The numbers below refer to the step numbers on the diagnostic table.
2. A partial malfunction in the high speed GMLAN serial data circuits uses a different procedure from a total malfunction of the high speed GMLAN
data circuits. The following modules communicate on the high speed GMLAN serial data circuits:
-
Engine control module (ECM)
-
Transmission control module (TCM)
6. Data link connector terminals 6 and 14 provide the connection to the GMLAN serial data high circuit and the GMLAN serial data low circuit
respectively.