ADAPTER 6I8804 - Caterpillar

Note: Ensure that the diagnostic code (CID FMI) is on hold. Ensure that the "SERV CODE" indicator is ON. Use the electrical system schematic of the engine that is being serviced to find the connector contact that is located on the Main Display Module. The connector contact should correspond to the current CID that is shown on the Display Area.The diagnostic code is recorded when the Main Display Module reads an abnormal sensor signal. The abnormal signal means that the signal is not identifiable by the internal circuitry of the Main Display Module. The corresponding Indicator Lamp begins flashing as a result of this diagnostic condition. Also, the Gauge Needle is in the warning region. The following examples are possible causes.
The marine gear oil pressure sensor has a problem.
The marine gear oil pressure sensor ground circuit in the engine harness is open.
The marine gear oil pressure sensor signal circuit in the engine harness is shorted to +battery.
The marine gear oil pressure sensor signal circuit in the engine harness is open or the connector is disconnected.
The harness code is incorrect.
The Main Display Module has a problem.
Check the Display Area and the Harness.
Turn the "ECS" switch to the OFF/RESET position.
Check for loose terminal connections or corroded terminal connections to the marine gear oil pressure sensor.
Clean corroded terminals and tighten loose connections.
Turn the "ECS" switch to the COOLDOWN/STOP position.
The "SERV CODE" indicator should be ON for the diagnostic code CID 0127 FMI 08.
Confirm that the harness code selection matches the application.
Determine the CURRENT harness code selection. For more information, see Testing And Adjusting, "Harness Code - Troubleshoot".
Determine the CORRECT harness code selection for the application. For more information, see Systems Operation, "Quad Gauge Module".
Compare the CURRENT harness code selection to the CORRECT harness code selection.Expected Result: The CURRENT harness code selection is correct for the application.Results:
OK - Proceed to 3.
Not OK - Correct the harness code selection or install marine gear sensors so that the application matches the current harness code selection. If the marine gear sensors are not installed, use harness code 11. If harness code 9, harness code 10 or harness code 12 is selected, make sure the marine gear sensors are installed. If the cause of the diagnostic is not found, proceed to 3.
Measure the Voltage of the