52 RENR5042-02 Troubleshooting Section Troubleshooting with a Diagnostic Code Refer to Troubleshooting, “Diagnostic Code Cross Reference” for the complete list of the diagnostic codes and a description of each code. There is a troubleshooting procedure for every diagnostic code. Refer to Troubleshooting, “Troubleshooting With A Diagnostic Code”. i02085761 Flash Codes When a diagnostic code is activated, the Electronic Control Module (ECM) transmits information about the code over the J1939 data link. Some J1939 devices may display the code. However, the code will be displayed with a SPN-FMI code.
Refer to Troubleshooting, “Diagnostic Code Cross Reference” for a cross-reference between SPN-FMI codes and diagnostic codes. SMCS Code: 1900 Flash codes are a simple way to alert the operator that a problem exists with the engine’s control system or with the engine’s operation. Each flash code is a two digit number. The diagnostic lamp flashes in order to identify the flash code. EXAMPLE Do not confuse diagnostic codes with event codes. Event codes alert the operator that an abnormal operating condition such as low oil pressure or high coolant temperature has been detected. Refer to Troubleshooting, “Troubleshooting with an Event Code” for additional information on event codes. Note:
Flash Code 27 would flash on the diagnostic lamp in the following manner: Two short flashes Hesitation Seven short flashes For the descriptions of the flash codes, refer to Troubleshooting, “Diagnostic Code Cross Reference”. i02286316 Diagnostic Codes SMCS Code: 1900 Diagnostic Codes Diagnostic codes alert the operator that a problem in the electronic system has been detected. Diagnostic codes also indicate the nature of the problem to the service technician. The Caterpillar Electronic Technician (ET) is a software program that is designed to run on a personal computer. Diagnostic codes may be viewed on a personal computer that has Cat ET software.
Diagnostic codes consist of the component identifier (CID) and the failure mode identifier (FMI). Component Identifier (CID) The CID is a number with three or four digits. The CID indicates the component that generated the code. For example, the CID number 0001 identifies the fuel injector for the number one cylinder. Failure Mode Identifier (FMI) The FMI is a two digit code that indicates the type of failure. g01117578 Illustration 10 Output voltage from a typical analog temperature sensor