CONTROL & MTG GP-ELECTRONIC 5027159 - Caterpillar

Illustration 1 g01438113
System Schematic For Alarm Module (ALM)The Alarm Module (ALM) is available as an option. The ALM may be mounted on the front panel. Also, the ALM may be placed at a distance from the control panel as a remote annunciator. The ALM is used in order to satisfy the requirements of the customer. The ALM may be used in order to satisfy National Fire Protection Association (NFPA) requirements by annunciating the presence of a diagnostic code.The ALM communicates with the GSC+P by a serial data link. When the data link malfunctions, all of the indicators on the ALM, that are controlled by the data link, flash at a rate of .5 Hz.Note: The maximum number of the ALM or the Customer Interface Module (CIM) that may be connected to the serial data link is equal to three. The maximum distance between a module and the GSC+P is 305 m (1000 ft). If these specifications are not met, the ALM indicators may begin to flash. Also, the GSC+P may show a CID 0333 FMI 04. If the setup is not in compliance with the specifications, reduce the number of modules and/or shorten the distance to the modules.Note: Diagnostic codes are created when the harness connector is disconnected from the GSC+P during these troubleshooting procedures. Clear these created diagnostic codes after the particular problem is corrected and the particular diagnostic code is cleared.The possible cause of a CID 0333 FMI 04 is a short from the negative battery terminal "(BATT-)" to the data signal.The GSC+P treats a CID 0333 FMI 04 as an alarm fault. Clear the diagnostic code from the fault log after troubleshooting is complete.Note: If a CID 0333 FMI 04 is active on the upper display and no alarm module is installed, then check the terminal strips on the subpanel for a short. Perform the check from the signal wire to "BATT-". Also, check the customers' connection box for a short from the alarm data signal wire to "BATT-".Test Step 1. CHECK IF THE DIAGNOSTIC CODE IS ACTIVE
Turn the Engine Control Switch (ECS) to the OFF/RESET position and then turn the ECS