G3500 Industrial Engines Caterpillar

Diagnostic codes alert the operator that a problem exists. Diagnostic codes indicate the following types of problems to the service technician:

• Shutdown

• Warning

• Improper parameter programming

• Events

Diagnostic codes may be viewed on the DDT. When a diagnostic code is present, correct the problem as soon as possible. The TCM will not automatically clear the code from the DDT.

Note all of the diagnostic codes in order to avoid losing the codes while you perform the troubleshooting procedures. After you have completed the repairs, turn off the system's power in order to clear all of the diagnostic codes.

The diagnostic codes for the TCM are listed in Table 1.

Table 1

Diagnostic Codes for the Timing Control Module
DDT CODES	Description
01	No Speed Sensor Signal (Open)
02	No Speed Sensor Signal (Short)
03	No Crank Angle Sensor (Open)
04	No Crank Angle Sensor (Short)
05	No Magneto Interface Signal
06	No Right Detonation Sensor Signal
07	No Left Detonation Sensor Signal
08	Magneto Out Of Calibration
09	Detonation Engine Shutdown
18	Too Many Flywheel Teeth Detected at Start
19	Too Few Flywheel Teeth Detected at Start