SPRING 3S1374 - Caterpillar

EMS Displays An ERROR Message Intermittently
Probable Root Cause:* CAT Data Link harness problem; refer to the CAT Data Link Troubleshooting procedureEMS Display Is Not Operating
Probable Root Cause:* Electrical Power Supply to EMS Display* Connector or wiring problem in wiring harness* Check the wiring harness and connectors for opens or shortsEMS Displays An ERROR Message
Probable Root Cause:* CAT Data Link harness problem* Improper EMS Harness Code* Improper Engine Location* Battery connections at the battery sourceEMS Displays Error Under One Set Of Gauges (PORT Or STBD)
Probable Root Cause:* CAT Data Link harness problem* ECM or personality Module Problem* Improper EMS Harness Code* Improper Engine LocationEMS Tachometer Display Is Not Operating
Probable Root Cause:* Electrical Power Supply to EMS Display* Electrical Power Supply from the EMS to The Tachometer* Connector Or Wiring Problem In Wiring Harness* Check The Wiring Harness And Connectors For Opens Or ShortsEMS Quad Gauge Display Is Not Operating
Probable Root Cause:* Electrical Power Supply to EMS Display* Electrical Power Supply from the EMS to The Tachometer* Connector Or Wiring Problem In Wiring Harness* Check The Wiring Harness And Connectors For Opens Or ShortsEMS Functional Test CAT Data Link Troubleshooting Bypass Harness Wiring Diagram 140-2588 CAT Data Link Booster
ERROR messages or gauge needle instability on Engine Vision, EMS, or CMS displays could be an indication of a problem with the signal from the ECM to the display unit. The following could be symptoms of a deterioration in the ability of the communications wiring to transmit a complete signal:* The tachometer needle moves from the current rpm reading to 0 rpm. The unit displays an ERROR message* All four quad gauges move back and forth in unison with the tachometer* An error message appears on the main display* An EE message appears on the tachometer display.The 140-2588 Data Booster is an external device that improves monitoring system performance in a wide variety of vessel wiring systems.
Figure 43 - CAT Data Link Booster ConnectionsECM Connector Pin Locations 1. Turn OFF power to the engine ECM and display module.2. Remove the ECM connector -Battery pin and reinsert it into pin-3 of the 4-Pin DT Connector B.3. Remove the ECM connector +8 VDC pin and reinsert it into pin-4 of the 4-Pin DT Connector B.4. Remove the ECM connector CAT Data+ pin and reinsert it into pin-1 of the 4-Pin DT Connector B.5. Remove the ECM connector CAT Data- pin and reinsert it into pin-2 of the 4-Pin DT Connector B.6. Insert the BLACK wire into the ECM connector -Battery pin.7. Insert the PINK wire into the ECM connector CAT Data+ pin.8. Insert the WHITE wire into the ECM connector CAT Data- pin.9. Insert the RED wire into the ECM connector +8 VDC supply pin.10. Plug Connector B into Connector A.11. Turn ON power to the Engine ECM and display module.A CAT Data Link Passive Booster should be connected to the PORT and STBD ECM. Only one CAT Data Link Booster is allowed for each ECM.