WASHER 1454911 - Caterpillar

The Quad Gauge Electronic Modules show the information that is received from the sensors. Information that is received through the CAT data link from the sensors, senders, or the engine ECM is used to drive the gauge needles. The needles will point straight up under normal conditions.Harness Codes are used by the Main Display Module to determine the number of Gauge Cluster Modules that are present. Harness Codes also indicate whether optional sensors are installed and whether the engine is "JWAC" or "SCAC". Engine applications that are equipped with Prime Gauge Cluster Modules imply that the Standby Gauge Cluster Modules are also present. The Standby Quad Gauge Cluster includes gauge 1 through gauge 4. The Prime Quad Gauge Cluster includes gauge 1 through gauge 8. The Premium Quad Gauge Cluster includes gauge 1 through gauge 12. The following charts show the Harness Codes for Standby options, Prime options, and Premium options.A panel is provided that gives the technician access to Terminal Block 2 (TB-2) to change the harness code. The harness code is changed by selecting which pins are open and which pins are grounded. Grounds can be left open while selecting the harness code. The grounds should not be left open on the harness code pins.
Table 1
Application     Mode 5 Harness Code Display     Connections On The 40 Pin Caterpillar Monitoring System Connector    
Pin 31 Pin 03     Pin 12     Pin 22     Pin 16     Pin 6    
Generator Engine (1) with Standby Panel     3     Open     Open     Ground     Ground     Ground     Ground    
Generator Engine (1) with Prime Panel     5     Open     Ground     Open     Ground     Ground     Ground    
Generator Engine (1) with Premium Panel And SCAC     6     Ground     Open     Open     Ground     Ground     Ground    
Generator Engine (1) with Premium Panel And JWAC     7     Open     Open     Open     Ground     Ground     Ground    
Marine Propulsion Engine with Premium Panel And SCAC     9     Open     Ground     Ground     Open     Ground     Ground    
Marine Propulsion Engine with Prime Panel And Marine Gear Sensors     10     Ground     Open     Ground     Open     Ground     Ground    
Marine Propulsion Engine with Prime Panel And No Marine Gear Sensors     11     Open     Open     Ground     Open     Ground     Ground    
Marine Propulsion Engine with Premium Panel And JWAC     12     Ground     Ground     Open     Open     Ground     Ground    
Locomotive Engine     35     Open     Open     Ground     Ground     Ground     Open    
( 1 ) Includes Marine AuxiliaryNote: Reference Testing And Adjusting, "Connector Contact Description Of Main Display Module" for more information about the Connector Contacts for Generator Sets. Reference Testing And Adjusting, "Connector Contact Description Of Main Display Module" for more information about the Connector Contacts for Marine