ADAPTER AS 9R1737 - Caterpillar

Diagnostic codes are associated with failed electrical components or circuits. These components or circuits provide information to the GSC or the components or circuits receive information from the GSC. The diagnostic codes are designated as alarm faults or shutdown faults. See Systems Operation, "Shutdown Mode"for more information. See Systems operation, "Alarm Mode"for more information. Alarm Mode Sequence Of Operation - When an alarm fault occurs the GSC performs the following steps.
The GSC activates the alarm mode.
The fault alarm indicator FLASHES.
When the alarm codes key is pressed, the corresponding diagnostic code (CID FMI) is shown on the upper display.
The engine continues to run or the engine is able to start. Shutdown Mode Sequence Of Operation - When a shutdown fault occurs the GSC performs the following steps.
The GSC activates shutdown mode.
The fault shutdown indicator FLASHES.
The corresponding diagnostic code (CID FMI) is immediately shown on the upper display.
The engine is shut down or the engine cannot be started. The diagnostic code (CID FMI) closely identifies the cause of the fault. Each diagnostic code consists of two identifiers and an indicator. The identifiers are shown on the upper display. Service personnel interpret the identifiers in order to assist with troubleshooting. The indicators are listed below. Component Identifier (CID) - The CID is a three digit code. The code that is indicated corresponds to a faulty component. The CID is shown on the upper display. For example, a "190" is the code for the circuit for the engine magnetic pickup (MPU). See the Testing And Adjusting, "Troubleshooting Diagnostic Codes" for a list of CID codes. Failure Mode Identifier (FMI) - The FMI is a two digit code. The FMI tells the type of failure that has occurred. The FMI is shown on the upper display at the same time as the CID. For example, FMI "3" means that the signal voltage is too high. See Testing And Adjusting, "Troubleshooting Diagnostic Codes" for a list of failure mode identifiers.DIAG indicator - When "DIAG" is FLASHING, the diagnostic code (CID FMI) that is shown on the upper display is active. When "DIAG" is ON CONTINUOUSLY there is an inactive diagnostic fault. The diagnostic codes are recorded in the fault log. Also, see Systems Operation, "Fault Log Viewing OP1". When "DIAG" is not showing, there are NO diagnostic codes that have been detected.
Illustration 1 g00318043
Upper Display That Is Showing A "CID 190 FMI 3" Diagnostic CodeThe above example shows a diagnosed fault. Also, that fault is sending the information to the GSC for display. The GSC is receiving a signal from the engine speed sensor (CID 190). The signal is too high so the FMI is 3. The signal is being received at this time so "DIAG" is FLASHING. Note: The GSC response (alarm or shutdown) to four diagnostic faults is programmable by service personnel. The response that is usually programmed into the GSC is for an alarm. P04 would then be "0". When a shutdown response is programmed P04 would be "1". See Setpoint P04