Active Diagnostic Codes
An Active diagnostic code represents a problem with the electronic control system. This problem should be corrected as soon as possible. When an active diagnostic code is generated, a display module such as the Electronic Monitoring System (EMS) may produce a warning.
Logged Diagnostic Codes
When the ECM generates a diagnostic code the ECM logs the code in permanent memory. The ECM has an internal diagnostic clock. The ECM will record the hour of the first occurrence of the diagnostic code. The ECM will record the hour of the last occurrence of the diagnostic code. The ECM will record the number of occurrences of the code. This information is a valuable indicator for troubleshooting intermittent problems. 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 the ECM. Diagnostic codes that are logged repeatedly may indicate a problem that needs special investigation.
If the symptoms continue, use the proper procedure for troubleshooting the symptoms that have been experienced by the operator.
Note: Always clear logged diagnostic codes after investigating and correcting the problem which generated the code.
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| Illustration 1 | g00592364 |
The diagram indicates output voltage from the Coolant Temperature Sensor. The Cat ET can be used to turn ON the engine monitoring for a specific sensor. When the monitoring is turned ON the sensor's value and any diagnostic event code will appear on an electronic monitoring module or on the Cat ET. When the features are turned OFF, the engine monitoring will be disabled, but the event is logged in the ECM.
Diagnostic Flash Codes
Flash codes are used to represent diagnostic codes in the electronic system in order to alert the operator that a problem exists. The flash codes are a two digit number. A series of flashes represents the flash code on the diagnostic lamp.
EXAMPLE
Note: Flash Code 27 would flash on the diagnostic lamp in the following manner.
- Two short flashes with approximately 0.3 seconds between flashes.
- 1 second hesitation
- Seven short flashes with approximately 0.3 seconds between flashes.
If more than one diagnostic flash code is active, there will be a 4 second delay between flash codes.
Note: Flash codes can represent more than one diagnostic code. Make a note of all of the diagnostic codes that are represented by a particular flash code. Refer to Table 1.
Diagnostic Terminology
| 3500B System Diagnostic Codes | |||
|---|---|---|---|
| Flash Codes | CID (1) | FMI (2) | Description |
| 71 | 0001 | 05 | Injector Cylinder 1 open circuit |
| 71 | 0001 | 06 | Injector Cylinder 1 short |
| 72 | 0002 | 05 | Injector Cylinder 2 open circuit |
| 72 | 0002 | 06 | Injector Cylinder 2 short |
| 73 | 0003 | 05 | Injector Cylinder 3 open circuit |
| 73 | 0003 | 06 | Injector Cylinder 3 short |
| 74 | 0004 | 05 | Injector Cylinder 4 open circuit |
| 74 | 0004 | 06 | Injector Cylinder 4 short |
| 75 | 0005 | 05 | Injector Cylinder 5 open circuit |
| 75 | 0005 | 06 | Injector Cylinder 5 short |
| 76 | 0006 | 05 | Injector Cylinder 6 open circuit |
| 76 | 0006 | 06 | Injector Cylinder 6 short |
| 77 | 0007 | 05 | Injector Cylinder 7 open circuit |
| 77 | 0007 | 06 | Injector Cylinder 7 short |
| 78 | 0008 | 05 | Injector Cylinder 8 open circuit |
| 78 | 0008 | 06 | Injector Cylinder 8 short |
| 79 | 0009 | 05 | Injector Cylinder 9 open circuit |
| 79 | 0009 | 06 | Injector Cylinder 9 short |
| 80 | 0010 | 05 | Injector Cylinder 10 open circuit |
| 80 | 0010 | 06 | Injector Cylinder 10 short |
| 81 | 0011 | 05 | Injector Cylinder 11 open circuit |
| 81 | 0011 | 06 | Injector Cylinder 11 short |
| 82 | 0012 | 05 | Injector Cylinder 12 open circuit |
| 82 | 0012 | 06 | Injector Cylinder 12 short |
| - | 0091 | 08 | Throttle Position signal abnormal |
| - | 0094 | 02 | Fuel Pressure misinstalled |
| 37 | 0094 | 03 | Fuel Pressure open/short to +batt |
| 37 | 0094 | 04 | Fuel Pressure short to ground |
| - | 0094 | 13 | Fuel Pressure calibration required |
| - | 0100 | 02 | Engine Oil Pressure out of range |
| 24 | 0100 | 03 | Engine Oil Pressure open/short to +batt |
| 24 | 0100 | 04 | Engine Oil Pressure short to ground |
| - | 0100 | 13 | Engine Oil Pressure calibration required |
| - | 0101 | 03 | Crankcase Pressure open/short to +batt |
| - | 0101 | 04 | Crankcase Pressure short to ground |
| - | 0101 | 13 | Crankcase Pressure calibration required |
| 27 | 0110 | 03 | Engine Coolant Temperature open/short to +batt |
| 27 | 0110 | 04 | Engine Coolant Temperature short to ground |
| - | 0168 | 00 | System Voltage High |
| - | 0168 | 01 | System Voltage Low |
| 51 | 0168 | 02 | System Voltage intermittent |
| 34 | 0190 | 02 | Loss of Engine Speed signal |
| - | 0190 | 03 | Engine Speed open/short to +batt |
| - | 0190 | 07 | Primary Speed Sensor misinstalled |
| - | 0190 | 08 | Engine Speed signal abnormal |
| - | 0253 | 02 | Personality Module mismatch |
| 53 | 0254 | 12 | Electronic Control Module Error |
| - | 0261 | 13 | Engine Timing calibration required |
| 21 | 0262 | 03 | 5 Volt Sensor Supply short to +batt |
| 21 | 0262 | 04 | 5 Volt Sensor Supply short to ground |
| 21 | 0263 | 03 | Digital Sensor Supply short to +batt |
| 21 | 0263 | 04 | Digital Sensor Supply short to ground |
| - | 0268 | 02 | Check Programmable Parameters |
| - | 0273 | 00 | Turbo Outlet Pressure above normal |
| - | 0273 | 03 | Turbo Outlet Pressure open/short to +batt |
| - | 0273 | 04 | Turbo Outlet Pressure short to ground |
| - | 0273 | 13 | Turbo Outlet Pressure calibration required |
| - | 0274 | 03 | Atmospheric Pressure open/short to +batt |
| - | 0274 | 04 | Atmospheric Pressure short to ground |
| - | 0274 | 13 | Atmospheric Pressure calibration required |
| - | 0275 | 03 | Right Turbo Inlet Pressure open/short to +batt |
| - | 0275 | 04 | Right Turbo Inlet Pressure short to ground |
| - | 0275 | 13 | Right Turbo Inlet Pressure calibration required |
| - | 0276 | 03 | Left Turbo Inlet Pressure open/short to +batt |
| - | 0276 | 04 | Left Turbo Inlet Pressure short to ground |
| - | 0276 | 13 | Left Turbo Inlet Pressure calibration required |
| - | 0277 | 08 | Timing Calibration signal abnormal |
| - | 0279 | 03 | Aftercooler Temperature open/short to +batt |
| - | 0279 | 04 | Aftercooler Temperature short to ground |
| - | 0289 | 02 | Unfiltered Fuel Pressure misinstalled |
| - | 0289 | 03 | Unfiltered Fuel Pressure open/short to +batt |
| - | 0289 | 04 | Unfiltered Fuel Pressure short to ground |
| - | 0289 | 13 | Unfiltered Fuel Pressure calibration required |
| - | 0336 | 02 | Incorrect ECS Switch Inputs |
| - | 0337 | 02 | Incorrect Remote E-Stop Switch inputs |
| - | 0338 | 05 | Pre-lube Relay open circuit |
| - | 0338 | 06 | Pre-lube Relay short to ground |
| - | 0342 | 02 | Loss of Secondary Engine Speed signal |
| - | 0342 | 03 | Secondary Engine Speed open/short to +batt |
| - | 0342 | 07 | Secondary Speed Sensor misinstalled |
| - | 0342 | 08 | Secondary Engine Speed signal abnormal |
| - | 0444 | 05 | Start Relay open circuit |
| - | 0444 | 06 | Start Relay short to ground |
| - | 0446 | 05 | Air Shutoff Relay open |
| - | 0446 | 06 | Air Shutoff Relay short |
| - | 0542 | 02 | Unfiltered Engine Oil Pressure misinstalled |
| - | 0542 | 03 | Unfiltered Engine Oil Pressure open/short to +batt |
| - | 0542 | 04 | Unfiltered Engine Oil Pressure short to ground |
| - | 0542 | 13 | Unfiltered Engine Oil Pressure cal required |
| - | 0545 | 05 | Ether Start Relay open/short to +batt |
| - | 0545 | 06 | Ether Start Relay short to ground |
| - | 0827 | 03 | Left Exhaust Temperature open/short to +batt |
| - | 0827 | 04 | Left Exhaust Temperature short to ground |
| - | 0827 | 08 | Left Exhaust Temperature signal abnormal |
| - | 0828 | 03 | Right Exhaust Temperature open/short to +batt |
| - | 0828 | 04 | Right Exhaust Temperature short to ground |
| - | 0828 | 08 | Right Exhaust Temperature signal abnormal |
| - | 1177 | 08 | Fuel Position Multiplier Sensor noisy signal |
| ( 1 ) | The Component Identifier is a code which is assigned to each component. |
| ( 2 ) | The Failure Mode Identifier is a failure of a component. |