BOOT 7E6710 - Caterpillar

Illustration 1 g00479969
System Schematic For Electronic Governor Relay (EGR)
Illustration 2 g00488518
System Schematic For Air Shutoff Relay (ASR)The CID 566 alerts the operator that the GSC did not control the engine shutdown. Any fault shutdown that is initiated solely by the engine ECM will result in a CID 566 on the GSC. If an outside influence causes the engine to shut down, the GSC indicates a CID 566. There is only one failure mode for a CID 566 and the mode is FMI 7 (faulty mechanical response).The diagnostic code causes the following sequence of events:
On a running engine, the GSC detects that the engine speed has dropped from the rated speed to 0 rpm when the GSC has not called for a shutdown.
The GSC determines that no fault for the engine speed sensor is present that explains the drop in the speed signal.
The GSC indicates a CID 566 FMI 7 and the GSC disables the engine from running. ProcedureThe possible cause of a CID 566 FMI 7 is that a component that is not under the control of the GSC has caused an engine shutdown. The GSC treats this diagnostic code as a shutdown fault. Clear the diagnostic code from the fault log after troubleshooting is complete. Note: This procedure requires many voltage measurements during simulated engine cranking. The fuse for the starting motor "F4" on the relay module is removed in order to prevent the activation of the starting motor. Voltage measurements must be made quickly before the total cycle crank time (setpoint P17) elapses. The total cycle crank time is defaulted to ninety seconds. See Systems Operation, "Engine/Generator Programming OP5". If a voltage measurement takes too long (more than 90 seconds), the GSC indicates an overcrank fault. The indicator for the overcrank shutdown will FLASH. In order to continue with a voltage measurement, the overcrank fault must be reset by turning the ECS to OFF/RESET. Then turn the ECS to START.
Perform an initial check. Before proceeding with the troubleshooting procedures, do the following steps:
Make sure that there are NO OTHER ACTIVE FAULTS. Erroneous troubleshooting and needless replacement of parts can be caused by a failure to check for other diagnostic codes. The operator will make many voltage measurements while the GSC is attempting to crank the engine. The GSC detects other diagnostic codes. If the GSC detects other diagnostic codes, the GSC will prevent the starting of the engine by shutting off the fuel and the air.
Check the fuel level and the fuel quality.
Check for a plugged fuel filter.
Check for a plugged air filter.
Refer to the Engine Service Manual if there is an obvious engine fault. Also, refer to the Engine Service Manual if there is an obvious fault with the fuel system.
Check the air shutoff solenoid for activation. If the air shutoff solenoid is activated and the air shutoff solenoid cannot be deactivated, begin troubleshooting with 15. Otherwise begin troubleshooting with 2.
Verify the diagnostic code.
Observe the upper display. Check that the CID 566 FMI 7 is showing.Expected Result: