SPRING 9T0653 - Caterpillar

Diagnostic Codes
Diagnostic codes alert the operator that a problem in the electronic system has been detected. Diagnostic codes are also used by the service technician to identify the nature of the problem. Cat Electronic Technician (ET) is a software program that is designed to run on a personal computer. The software can be used by the service technician in order to view the diagnostic code information for an ECM. Diagnostic codes may consist of the component identifier (CID), and the failure mode identifier (FMI).Component Identifier (CID) - The CID indicates the component that generated the code. For example, the CID number 1 identifies the fuel injector for the number one cylinder.Failure Mode Identifier (FMI) - The FMI indicates the type of failure.Suspect Parameter Number (SPN) - The SPN is a three-digit code which is assigned to each component in order to identify data via the data link to the ECM. Used on the diagnostics for the CAN data link.Event Codes
Event codes alert the operator that an abnormal engine operating condition such as low oil pressure or high coolant temperature has been detected. When the event code is generated, the event is active.An active event code represents a problem with engine operation. Correct the problem as soon as possible.When an event 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 an SPN-FMIcode . Refer to Troubleshooting, "Diagnostic Code Cross Reference" for a cross-reference between event codes and SPN-FMI codes.When certain event codes are activated, the ECM also generates a flash code that will be displayed on the diagnostic lamp. Refer to Troubleshooting, "Diagnostic Code Cross Reference" for a cross-reference between event codes and flash codes.For more information, refer to your Troubleshooting Guide or consult with a Cat dealer.Codes
Table 1
CID - FMI CDL ET Description
1 - 5 Cylinder 1 Injector - Current Below Normal
1 - 6 Cylinder 1 Injector - Current Above Normal
2 - 5 Cylinder 2 Injector - Current Below Normal
2 - 6 Cylinder 2 Injector - Current Above Normal
3 - 5 Cylinder 3 Injector - Current Below Normal
3 - 6 Cylinder 3 Injector - Current Above Normal
4 - 5 Cylinder 4 Injector - Current Below Normal
4 - 6 Cylinder 4 Injector - Current Above Normal
5 - 5 Cylinder 5 Injector - Current Below Normal
5 - 6 Cylinder 5 Injector - Current Above Normal
6 - 5 Cylinder 6 Injector - Current Below Normal
6 - 6 Cylinder 6 Injector - Current Above Normal
41 - 3 8 V DC Supply : Voltage Above Normal
41 - 4 8 V DC Supply : Voltage Below Normal
98 - 8 Throttle Position Sensor : Abnormal Frequency, Pulse Width, or Period
91-13 Throttle Position Sensor : Calibration Required
94 - 3 Fuel Delivery Pressure Sensor : Voltage Above Normal
94 - 4 Fuel Delivery Pressure Sensor : Voltage Below Normal
96 - 3 Fuel Level Sensor : Voltage Above Normal
96 - 4 Fuel Level Sensor : Voltage