BRACKET AS 1W5278 - Caterpillar

Diagnostic Lamp
Use the diagnostic Lamp or a Caterpillar electronic service tool to determine the diagnostic flash code.Use the following procedure to retrieve the flash codes if the engine is equipped with a diagnostic lamp:
Turn the ignition key to the ON position.
Turn the ignition keyswitch to the OFF position.
Turn the cruise control ON/OFF switch to the OFF position.
Move the SET/RESUME switch to either position. Hold that position until the yellow lamp begins to flash. The yellow lamp will flash in order to indicate a two digit flash code and the SET/RESUME switch may be released. The sequence of flashes represents the system diagnostic message. Count the first sequence of flashes in order to determine the first digit of the flash code. After a two second pause, the second sequence of flashes will identify the second digit of the flash code.Any additional flash codes will follow after a pause. These codes will be displayed in the same manner. Flash Code 55 indicates that No Detected Faults have occurred since the ignition keyswitch has been turned to the ON position.For further information, assistance for repairs, or troubleshooting, refer to the Service Manual or consult an authorized Caterpillar dealer.Some codes record events. Also, some codes may also indicate that a mechanical system needs attention. Troubleshooting is not required for codes 35, 41, 47 and 55. Code 01 will not display a flash code. Some codes will limit the operation or the performance of the engine.Table 1 indicates the potential effect on the engine performance with active flash codes and table 1 forms a list of electronic diagnostic codes and descriptions.Table 1 also indicates the suggested operator action for each active flash code.
Table 1
Flash Codes for C7 and C9 On-Highway Engines
Diagnostic Flash Code An "X" indicates that the effect on engine performance may occur if the code is active. An "X" indicates the suggested operator action if the code is active.
Misfire Low Power Loss of RPM Shut Down Stop Engine(1) Service Engine(2) Schedule Engine Service(3)
12 Coolant Level Sensor Circuit Fault (4)(5) X
15 An Injection Actuation Pressure Sensor Circuit Fault X X X
17 Injection Actuation Pressure Sensor Out of Range X X X X
18 Driver Fault for the Injection Actuation Pressure Control Valve X X X
21 Sensor Supply Voltage Fault (6) X X
24 Oil Pressure Sensor fault (5) X X
25 An Inlet Air Pressure Sensor Circuit Fault X X
26 Atmospheric Pressure Sensor Fault (5)(6) X
27 Coolant Temperature Sensor Fault(4)(6) X
28 Check Throttle Sensor Adjustment X X
29 Check PTO Throttle Sensor Adjustment(5) X X
31 Loss of Vehicle Speed Signal X X
32 Throttle Position Sensor Fault X X
33 Turbo Wastegate Solenoid Circuit Fault X X