Electronic Modular Control Panel II (EMCP II) For PEEC Engines Caterpillar

Troubleshooting Diagnostic Codes

Usage:

3412 2WJ

Diagnostic codes are associated with failed electrical components or circuits. These components and circuits provide information to the GSC. Also, these components and circuits receive information from the GSC. The diagnostic code closely identifies the cause of the fault. Each diagnostic code consists of the following indicators that are shown on the upper display: a component identifier (CID), a failure mode identifier (FMI) and a "DIAG" indicator. The CID describes the component in the system that is faulty. The FMI describes the nature of the fault. When the "DIAG" indicator is FLASHING, the fault is active. When the "DIAG" indicator is ON CONTINUOUSLY, the fault is inactive and the CID FMI is recorded in the fault log. To view the fault log, see Systems Operation, "Fault Log Viewing OP1". When the "DIAG" indicator is not present, there are NO diagnostic codes that have been detected or recorded. Service personnel interpret the identifiers in order to assist with troubleshooting.

When a diagnostic code is active, the GSC FLASHES the "DIAG" indicator. The GSC determines the type of fault (alarm or shutdown). Then, the GSC FLASHES the corresponding fault alarm indicator or the fault shutdown indicator. For a shutdown fault, the CID FMI is immediately shown on the upper display. For an alarm fault, the alarm codes key must be pressed first. Then, the CID FMI is shown on the upper display.

The GSC has a fault log to help with troubleshooting of diagnostic faults. Inactive diagnostic codes (CID FMI) are recorded in the fault log for viewing at a later time. Also, the number of occurrences are totalled. The total number of occurrences is shown on the upper display. An active alarm fault becomes inactive when the fault is no longer occurring. Also, in order for shutdown faults to become inactive, the ECS must be turned to OFF/RESET. See Systems Operation, "Fault Log Viewing OP1".

During troubleshooting, it is necessary to disconnect the harness connector (40 contact) from the GSC and faults are created. Because of internal circuitry, the GSC recognizes this condition as a FMI 3 for certain components. This fact is also used as an aid for troubleshooting. Clear these created diagnostic codes after the original diagnostic code is corrected. In a properly operating system, when the harness connector is removed from the GSC, the following diagnostic codes are recorded:

CID 100 FMI 3 pressure sensor (engine oil)
CID 110 FMI 3 temperature sensor (engine coolant)
CID 111 FMI 3 fluid level sensor (engine coolant)
CID 190 FMI 3 speed sensor (engine)
CID 331 FMI 2 switch (engine control)
CID 336 FMI 2 switch (engine control)

You can avoid confusion in a future service call if you clear a diagnostic fault from the fault log. Clear the diagnostic fault after you have corrected the fault. The "DIAG" indicator is NOT PRESENT when all diagnostic faults are cleared from the fault log and no active diagnostic faults exist. See Systems Operation, "Fault Log Clearing OP4".

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Table 1
Diagnostic Codes
CID / FMI	Description
CID 100 - Pressure Sensor (Engine Oil)
FMI 2	Data erratic, intermittent, or incorrect
FMI 3	Voltage above normal or shorted high
FMI 4	Voltage below normal or shorted low
CID 110 - Temperature Sensor (Engine Coolant)
FMI 2	Data erratic, intermittent, or incorrect
FMI 3	Voltage above normal or shorted high
FMI 4	Voltage below normal or shorted low
CID 111 - Fluid Level Sensor (Engine Coolant)
FMI 3	Voltage above normal or shorted high
CID 168 - Electrical System
FMI 3	Voltage above normal or shorted high
FMI 4	Voltage below normal or shorted low
CID 190 - Speed Sensor (Engine)
FMI 2	Data erratic, intermittent, or incorrect
FMI 3	Voltage above normal or shorted high
CID 248 - CAT Data Link
FMI 9	Abnormal update
CID 268 - EMCP Electronic Control (Generator Set)
FMI 2	Data erratic, intermittent, or incorrect
CID 269 - Sensor Power Supply
FMI 3	Voltage above normal or shorted high
FMI 4	Voltage below normal or shorted low
CID 330 - Unexpected Shutdown ⁽¹⁾
FMI 7	Mechanical system not responding properly
CID 331 - Switch (Engine Control) ⁽²⁾
FMI 2	Data erratic, intermittent, or incorrect
CID 333 - Alarm Module Control
FMI 3	Voltage above normal or shorted high
FMI 4	Voltage below normal or shorted low
CID 334 - Spare Output
FMI 3	Voltage above normal or shorted high
FMI 4	Voltage below normal or shorted low
CID 336 - Switch (Engine Control)
FMI 2	Data erratic, intermittent, or incorrect
CID 441 - Oil Step Relay
FMI 12	Bad device or component
CID 442 - Generator Fault Relay
FMI 12	Bad device or component
CID 443 - Crank Termination Relay
FMI 12	Bad device or component
CID 444 - Starting Motor Relay
FMI 12	Bad device or component
CID 445 - Run Relay
FMI 12	Bad device or component
CID 446 - Air Shutoff Relay
FMI 12	Bad device or component
CID 447 - Fuel Control Relay
FMI 12	Bad device or component
CID 500 - EMCP II Electronic Control (Generator Set)
FMI 12	Bad device or component
CID 560 - CAT Data Link ⁽³⁾
FMI 11	Failure mode not identified
CID 566 - Unexpected Shutdown
FMI 7	Mechanical system not responding properly
CID 590 - Engine Electronic Control Module
FMI 8	Abnormal update

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^( 1 )	This diagnostic code is applicable to the former 103-6177113-4500117-6200118-2121 Generator Set Control. This diagnostic code has been replaced by CID 566.
^( 2 )	This diagnostic code is applicable to the former 103-6177113-4500117-6200118-2121 Generator Set Control. This diagnostic code has been replaced by CID 336.
^( 3 )	This diagnostic code is applicable to the former 103-6177113-4500117-6200118-2121 Generator Set Control. This diagnostic code has been replaced by CID 248.