BOLT 7X7925 - Caterpillar

Conditions Which Generate This Code:
Illustration 1 g00795453
System Schematic For Crank Termination Relay (CTR) The GSC+ uses the crank termination relay (CTR) in order to activate optional components such as the generator running relay (GRR) and the governor control switch. The governor control switch is found only on the MUI engines. The CTR is located within the relay module. The governor control switch is located on the front panel of the MUI engines.The CTR is used to indicate that the engine is beginning to run without cranking. The GSC+ activates the CTR when engine speed is greater than the crank terminate setpoint. (Setpoint P011 should be 400 RPM.) Also, the starting motor relay has been deactivated. The CTR deactivates when the engine RPM reaches 0.Note: Whenever the GSC+ activates the CTR, "K3" is shown on the lower display. When the CTR is not activated, "K3" is not shown.The possible cause of a CID 0443 FMI 12 is an open coil or a shorted coil of the CTR.The system responses to this diagnostic code are listed below.
If the CTR is activated and a CID 0443 FMI 12 occurs the engine will continue to run. The GRR and the governor control switch (MUI engines) are deactivated.
If a CID 0443 FMI 12 occurs and the CTR is not activated, then the engine is able to start and the engine is able to run. The GRR and the Governor control switch (MUI engines) are not activated. The GSC+ treats a CID 0443 FMI 12 as an alarm fault. Active alarm faults are shown on the display when the "Alarm Codes" key is pressed. Also, the active alarm faults are shown when the ECS is in any position except the OFF/RESET position. Clear the diagnostic code from the fault log after troubleshooting is complete.This troubleshooting procedure is used to correct an active CID 0443 FMI 12 or the troubleshooting procedure is for an inactive CID 0443 FMI 12.Test Step 1. CHECK THE STATUS OF THE DIAGNOSTIC CODE.
Turn the ECS to the OFF/RESET position and then turn the ECS to the STOP position.
Press the "Alarm Codes" key.
Observe the upper display. Check that the CID 0443 FMI 12 is active.
If the diagnostic code is not active, enter the Service Mode. View the fault log for a OP1. Check that the diagnostic code is inactive.Expected Result:A CID 0443 FMI 12 is displayed as an active diagnostic code or CID 0443 FMI 12 is displayed as an inactive diagnostic code.Results:
OK - The CID 0443 FMI 12 is active or the CID 0443 FMI 12 is inactive. Proceed to test step 2.
NOT OK - The CID 0443 FMI 12 has not occurred. The diagnostic code is not active and the diagnostic code is not inactive. Stop.Test Step 2. CHECK THE INTERNAL CABLE OF THE RELAY MODULE.Note: Only open the relay module in a dry environment. If the relay module is open for more than twenty minutes, replace the desiccant bag which is located within the housing of the GSC+. See