Cross-Reference Information for Diagnostic Codes
Table 1 is a list of the diagnostic codes for the engine. The diagnostic codes are cross-referenced with the appropriate procedure that can be used to troubleshoot the code.
Further explanations of diagnostic codes are explained after Table 1.
Portions of this material are reprinted with permission from SAE J1939DA_201607© 2016 SAE International. SAE International is not responsible for any use or translation of this material, in whole or in part. Please contact SAE International to obtain a complete copy of SAE J1939DA_201607, the official definitive source of this standard.
| Cross-Reference from Code to Troubleshooting Procedure | |||
|---|---|---|---|
| Cat Data Link Code | Flash Code | SPN Code | Procedure |
| 1-5 Cylinder #1 Injector : Current Below Normal | 71 | 651-05 | Troubleshooting, "Injector Solenoid - Test" |
| 1-6 Cylinder #1 Injector : Current Above Normal | 651-06 | Troubleshooting, "Injector Solenoid - Test" | |
| 2-5 Cylinder #2 Injector : Current Below Normal | 72 | 652-05 | Troubleshooting, "Injector Solenoid - Test" |
| 2-6 Cylinder #2 Injector : Current Above Normal | 652-06 | Troubleshooting, "Injector Solenoid - Test" | |
| 3-5 Cylinder #3 Injector : Current Below Normal | 73 | 653-05 | Troubleshooting, "Injector Solenoid - Test" |
| 3-6 Cylinder #3 Injector : Current Above Normal | 653-06 | Troubleshooting, "Injector Solenoid - Test" | |
| 4-5 Cylinder #4 Injector : Current Below Normal | 74 | 654-05 | Troubleshooting, "Injector Solenoid - Test" |
| 4-6 Cylinder #4 Injector : Current Above Normal | 654-06 | Troubleshooting, "Injector Solenoid - Test" | |
| 5-5 Cylinder #5 Injector : Current Below Normal | 75 | 655-05 | Troubleshooting, "Injector Solenoid - Test" |
| 5-6 Cylinder #5 Injector : Current Above Normal | 655-06 | Troubleshooting, "Injector Solenoid - Test" | |
| 6-5 Cylinder #6 Injector : Current Below Normal | 76 | 656-05 | Troubleshooting, "Injector Solenoid - Test" |
| 6-6 Cylinder #6 Injector : Current Above Normal | 656-06 | Troubleshooting, "Injector Solenoid - Test" | |
| 41-3 8 Volt DC Supply : Voltage Above Normal | 21 | 678-03 | Troubleshooting, "Sensor Supply - Test" |
| 41-4 8 Volt DC Supply : Voltage Below Normal | 678-04 | Troubleshooting, "Sensor Supply - Test" | |
| 94-3 Fuel Delivery Pressure Sensor : Voltage Above Normal | 37 | 94-03 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 94-4 Fuel Delivery Pressure Sensor : Voltage Below Normal | 94-04 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" | |
| 100-3 Engine Oil Pressure Sensor : Voltage Above Normal | 24 | 100-03 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 100-4 Engine Oil Pressure Sensor : Voltage Below Normal | 100-04 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" | |
| 100-10 Engine Oil Pressure Sensor : Abnormal Rate of Change | 100-10 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" | |
| 110-3 Engine Coolant Temperature Sensor : Voltage Above Normal | 27 | 110-03 | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 110-4 Engine Coolant Temperature Sensor : Voltage Below Normal | 110-04 | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" | |
| 111-2 Engine Coolant Level Sensor : Erratic, Intermittent, or Incorrect | 62 | 111-02 | Troubleshooting, "Coolant Level - Test" |
| 168-0 Electrical System Voltage : High | 51 | 168-00 | Troubleshooting, "Electrical Power Supply - Test" |
| 168-1 Electrical System Voltage : Low | 168-01 | Troubleshooting, "Electrical Power Supply - Test" | |
| 168-2 Electrical System Voltage : Erratic, Intermittent, or Incorrect | 168-02 | Troubleshooting, "Electrical Power Supply - Test" | |
| 172-3 Intake Manifold Air Temperature Sensor : Voltage Above Normal | 38 | 105-03 | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 172-4 Intake Manifold Air Temperature Sensor : Voltage Below Normal | 105-04 | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" | |
| 174-3 Fuel Temperature Sensor : Voltage Above Normal | 13 | 174-03 | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" |
| 174-4 Fuel Temperature Sensor : Voltage Below Normal | 174-04 | Troubleshooting, "Sensor Signal (Analog, Passive) - Test" | |
| 190-8 Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period | 34 | 190-08 | Troubleshooting, "Speed/Timing - Test" |
| 253-2 Personality Module : Erratic, Intermittent, or Incorrect | 56 | 631-02 | Troubleshooting, "ECM Software - Install" |
| 261-13 Engine Timing Calibration : Calibration Required | 42 | 637-13 | Troubleshooting, "Timing - Calibrate" |
| 262-3 5 Volt Sensor DC Power Supply : Voltage Above Normal | 21 | 620-03
1079-03 |
Troubleshooting, "Sensor Supply - Test" |
| 262-4 5 Volt Sensor DC Power Supply : Voltage Below Normal | 620-04
1079-04 |
Troubleshooting, "Sensor Supply - Test" | |
| 268-2 Programmed Parameter Fault : Erratic, Intermittent, or Incorrect | 56 | 630-02 | Troubleshooting, "Configuration Parameters" |
| 274-3 Atmospheric Pressure Sensor : Voltage Above Normal | 26 | 108-03 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 274-4 Atmospheric Pressure Sensor : Voltage Below Normal | 108-04 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" | |
| 296-9 Transmission Control : Abnormal Update Rate | 58 | 639-09 | Troubleshooting, "CAN Data Link - Test" |
| 336-7 Engine Control Switch : Not Responding Properly | 57 | 1377-02 | Troubleshooting, "Switch Circuits - Test" |
| 342-8 Secondary Engine Speed Sensor : Abnormal Frequency, Pulse Width, or Period | 34 | 723-08 | Troubleshooting, "Speed/Timing - Test" |
| 650-12 Harness Code invalid | 52 | N/A | Troubleshooting, "ECM Software - Install" |
| 1435-9 System Master Control Module : Abnormal Update Rate | 53 | N/A | Troubleshooting, "Cat Data Link - Test" |
| 1632-9 Backup Engine Control Module : Abnormal Update Rate | 54 | N/A | Troubleshooting, "Cat Data Link - Test" |
| 1785-3 Intake Manifold Pressure Sensor : Voltage Above Normal | 25 | 102-03 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" |
| 1785-4 Intake Manifold Pressure Sensor : Voltage Below Normal | 102-04 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" | |
| 1785-10 Intake Manifold Pressure Sensor : Abnormal Rate of Change | 102-10 | Troubleshooting, "Sensor Signal (Analog, Active) - Test" | |
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. Caterpillar 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 Electronic Control Module (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.
Refer to Table 1 for a complete list of the diagnostic codes and the appropriate troubleshooting procedure.
Note: 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. If an event code is active, refer to Troubleshooting, "Event Codes".
| |
| Illustration 1 | g01138880 |
|
Example of the typical operating range of a temperature sensor (1) This area represents the normal operating range of the parameter. The normal output voltage of the sensor is between 0.2 VDC and 4.2 VDC. (2) In this area, the temperature above (3) In these areas, the output voltage of the sensor is too high or too low. The voltage is outside of the normal range. The electronic problem will generate a diagnostic code. Refer to Troubleshooting, "Diagnostic Trouble Codes" for additional information on diagnostic codes. | |
Note: This graphic is an example. The signal ranges in this graphic are used only as examples.
An active diagnostic code represents a problem with the electronic control system. Correct the problem as soon as possible.
When the engine's ECM generates an active diagnostic code, the "Active Alarm" indicator ("Engine Control Alarm Status" on Cat ET) is activated in order to alert the operator. If the condition that generated the code is momentary, the message disappears from the list of active diagnostic codes. The diagnostic code becomes logged.
When the ECM generates a diagnostic code, the ECM logs the code in permanent memory. The ECM has an internal diagnostic clock. Each ECM will record the following information when a code is generated:
- The hour of the first occurrence of the code
- The hour of the last occurrence of the code
- The number of occurrences of the code
This information is a valuable indicator for troubleshooting intermittent problems.
A code is cleared from memory when one of the following conditions occur:
- The service technician manually clears the code.
- The code does not recur for 100 hours.
- A new code is logged and there are already ten codes in memory. In this case, the oldest code is cleared.
Some diagnostic codes may be easily triggered. Some diagnostic codes may log occurrences that did not result in complaints. The most likely cause of an intermittent problem is a faulty connection or damaged wiring. The next likely cause is a component failure. The least likely cause is the failure of an electronic module. Diagnostic codes that are logged repeatedly may indicate a problem that needs special investigation.
Note: Always clear logged diagnostic codes after investigating and correcting the problem which generated the code.
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
Note: Flash Code 27 would flash on the diagnostic lamp in the following manner:
- Two short flashes
- Hesitation
- Seven short flashes
Suspect Parameter Number (SPN)
When a diagnostic code is activated, the 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.