WASHER-THRUST 7D7488 - Caterpillar

"Diagnostic" Lamp
Use the "DIAGNOSTIC" lamp or a Caterpillar electronic service tool to determine the diagnostic flash code. Not all diagnostic codes have a unique flash code.Note: Flash codes should only be used to indicate the nature of a diagnostic condition. Do not use flash codes to perform detailed troubleshooting.Use the following procedure to retrieve the diagnostic codes if the application is equipped with an engine DIAGNOSTIC lamp:
The "DIAGNOSTIC" lamp will flash in order to indicate a two-digit code. The sequence of flashes represents the system diagnostic message. Each digit of the two-digit code is determined by counting the number of flashes. The lamp flashes at a rate of two times per second. The lamp will pause for one second between digits. The lamp will pause for two seconds between codes.
Turn the start/run key to the ON position. The engine does not need to be started in order to view codes. The engine does not need to be running while the start/run switch is in the ON position. The "DIAGNOSTIC" lamp blinks on and off at five second intervals.
When the start/run key is in the ON position, the lamp is checked for proper operation. If there are any active codes except for Code 34, the codes are displayed at this time.Note: The "DIAGNOSTIC" lamp will illuminate for five seconds. The lamp will stay on if there is an active diagnostic code.
Active diagnostic codes will always be flashed. There is no toggle switch that will shut off the lamp. Table 1 indicates the potential effect on the engine performance with active flash codes. Table 1 also forms a list of Electronic diagnostic codes and descriptions.Possible Performance Effect of Active Diagnostic Codes
Table 1
Diagnostic Flash Code and Engine Performance sheet for 3408E and 3412E Industrial Engines
Diagnostic Flash Code Effect On Engine Performance Suggested Operator Action
Engine Misfire Low Power Reduced Engine Speed Shut down the Engine Service Schedule Service
13 Fuel temperature open/short to +batt X X
13 Fuel temperature short to ground X X
14 Injection Actuation Pressure Control Valve open circuit X X X X X
14 Injection Actuation Pressure Control Valve short to ground X X X X X
17 Battery voltage above normal (1) X
17 Battery voltage below normal X X X X
17 Battery voltage intermittent X X X X
21 Analog supply open/short to + batt X X
21 Analog supply short to ground X X
21 Digital supply short to +batt X X
21 Digital supply short to ground X X
24 Engine oil