Scheme 172 Log in Scheme 172: CAN BUS COMMUNICATION INTERMITTENT TEST For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS . See also:• DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure• DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Diagnosis and Testing• DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing