Communication Network Diagnostics: Notes

NOTE: When performing diagnostic procedures on module communications network, proper sequence must be used. See DIAGNOSTIC PROCEDURE SEQUENCE .

NOTE: 2WD vehicles without power windows and/or power door locks are equipped with a Central Timer Module (CTM). All other vehicles are equipped with a Generic Electronic Module (GEM). When diagnosing a network concern on vehicles equipped with a CTM, treat CTM as a GEM. NGS tester does not have a selection for CTM.