348-65029-1 Tohatsu GASKET, PUMP GUIDE PLATE

Illustration 1 g00721817
System Schematic For kW Level Output
The kW level output will be activated whenever the total power output of the generator exceed the setpoint P139. The kW level output is the connector contact 34 of the GSC+. This setpoint can be programmed from 0 to 110 percent of the rated power on the nameplate (setpoint P030). This setpoint can be programmed with a time delay from 0 to 120 seconds (setpoint P140). See System Operation, "Engine/Generator Programming OP5-0". Also, see System Operation, "Service Mode". Once the output is activated, the kW level output will be deactivated when the total power output of the generator drops below a programmed setpoint (setpoint P141). This setpoint is different from the activation setpoint. This setpoint can be programmed from 0 to 110 percent of the power rating on the nameplate of the generator. This setpoint can be programmed with a time delay from 0 to 120 seconds.When kW relay is disconnected from the GSC+, the voltage on the kW level output is approximately 5.0 DCV. When kW relay is connected to the GSC+, the voltage on the kW level output is approximately 0 volts. The kW level output is capable of drawing (sinking) approximately 100 mA. Documenting and troubleshooting any connections to this output is the responsibility of the customers and the dealers. The possible cause of a CID 0859 FMI 3 is a short to the +battery circuit of the kW level output.The GSC+ treats a CID 859 FMI 03 as an alarm fault.Troubleshooting of this failure is straight forward. The FMI 03 defines the problem as a short to "B+". Use the following information in order to find the exact cause of the diagnostic code.
FMI information
system schematic of the kW level output
customer's documentation
dealer's documentationTest Step 1. CHECK THE GENERATOR SET CONTROL
Verify that the CID 0859 FMI 03 diagnostic code is active.
Disconnect the wire from contact 34 of the GSC+.
Measure the voltage between contact 34 of the GSC+ and B-. Expected Result:The voltage is approximately 5 1.0 DCV.Results:
OK - The voltage is approximately 5 1.0 DCV. The voltage is correct. Proceed to test step 2.
NOT OK - The voltage is NOT approximately 5 1.0 DCV. The voltage is NOT correct. The GSC+ has failed.Repair: It is unlikely that the GSC+ has failed. Exit this diagnostic code procedure and repeat the CID 0859 FMI 03 diagnostic code procedure again. If the cause of the failure is still unknown, then replace the GSC+.STOPTest Step 2. CHECK FOR A SHORT IN THE WIRING OF THE KW LEVEL OUTPUT
Shut down the genset.
Disconnect the cable on the "B-" terminal of the battery, or open the optional battery disconnect switch.
The wire remains disconnected from contact 34 of the GSC+.
Measure the resistance between the wire that was disconnected from contact 34 of the GSC+ and contact 10 of the kW relay. Expected Result:The resistance is 480 ohms 48 ohms.Results:
OK - The resistance is between 430 and 530 ohms. It is unlikely that the GSC+ has failed.Repair: It is unlikley that the GSC+ has failed. The system may need to be reset. Reset the system by turning the engine control switch (ECS) to the OFF/RESET position. Exit this diagnostic code procedure and repeat the CID 0859 FMI 03 diagnostic code procedure again. If the cause of the failure is still unknown, replace the GSC+. See Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace"STOP
NOT OK - The resistance is less than 430 ohms or the resistance is greater than 530 ohms. The resistance is NOT correct.Repair: The kW relay is faulty or there is a short between the wire disconnected from contact 34 of the GSC+ and B+. Replace the kW relay or repair the wiring.STOP