Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	U183E	U183E	-	-
Ignition	U183E	U183E	-	-
Wake-Up Signal	U1814, U2099	U183E	-	-
Low Speed GMLAN Serial Data	U0078, 1	U183E	U0078, 1	-
Ground	-	U183E	-	-
1. Scan Tool Does Not Communicate With Low Speed GMLAN Device