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actuators.These outputs allow the CTM the ability to The CTM monitors its own internal circuitry as well as many of its input and output circuits, and t scan tool. Refer to the appropriate diagnostic information. HARD WIRED INPUTS The hard wired inputs to the CTM include the fol- lowing: • Fused B(+) • Fused ignition switch output (run-acc) • Fused ignition switch output (run-start) • Ground • Key-in ignition switch sense • Sliding door switch sense • Passenger door switch sense • Driver door switch sense • PCI bus circuit HARD WIRED OUTPUTS The hard wired outputs of the CTM include the fol- lowing: • Door lock relay output • Door unlock relay output • VTSS indicator driver MESSAGING The CTM uses the following messages received from other electronic modules over the PCI data bus: • Airbag Deploy (ACM) • Beep request (CMTC) • Charging System Failure (PCM) • Chime request (EMIC) • Engine RPM (PCM) • OK to Arm VTSS (PCM) • Security indicator request (SKIM) • System Voltage (PCM) • Valid/Invalid Key (SKIM) • Vehicle Distance (PCM) • Vehicle Speed (PCM) DIAGNOSIS AND TESTING - CENTRAL TIMER WARNING: To avoid personal injury or death, on restraint system before attempting any steering wheel, steering column, airbag, seat belt tem. Failure to take the proper precautions could The hard wired inputs to and outputs from the central timer module (CTM) may be diagnosed and However, conventional diagnostic methods may not prove conclusive in the diagnosis of the CTM. In t scan tool. Refer to the appropriate diagnos- tic information. REMOVAL (1) Disconnect and isolate the battery negative cable. (2) Slide the driver seat to the full forward posi- tion. (3) Disconnect the wire harness connector for the seat belt latch. (Fig. 1). (4) Remove the screws that secure the closeout panel beneathe the driver seat cushion and remove (5) Remove the screws that secure the central timer module to the bracket. (6) Disconnect the wire harness connectors from the central timer module. (7) Remove the central timer module from the vehicle. 8E - 2 ELECTRONIC CONTROL MODULES VA |