Central Timer Module (CTM)

On base-line models, CTM is hard wired to switches or indicators for chime and warning buzzer operations only, and does not communicate with any other modules through CCD bus. If a fault is present, repair switch and/or wiring or replace CTM as necessary.

On high-line models, Central Timer Module (CTM) is the main Body Control Module (BCM) for vehicle. CTM communicates with other modules through CCD bus and controls chime and warning indicators, courtesy entry lighting, Power Door Locks (PDL), Remote Keyless Entry (RKE), speed sensitive and intermittent wiper/washers and vehicle anti-theft monitoring related functions. CTM is fully addressible with DRBIII(R) scan tool, and is the preferred method for diagnostics. Retrieving CTM reports, Diagnostic Trouble Codes (DTC), or monitor actuator inputs and activate output commands can all be done using DRBIII(R), or compatible generic scan tool. During self-diagnostics or testing, if actuators and inputs can be monitored, and outputs are cycled when commanded, the fault is usually within the CTM.