TOOL KT- 1551536 - 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 diagnostic codes if the engine is equipped with a "DIAGNOSTIC" lamp:
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 diagnostic code. After a two second pause, the second sequence of flashes will identify the second digit of the diagnostic code.Any additional diagnostic codes will follow a pause. The additional diagnostic codes will be displayed in the same manner. Flash Code 55 signals that No Detected Faults have occurred since the ignition keyswitch has been turned to the ON position.Refer to the Service Manual or consult an authorized Caterpillar dealer for the following items.
Further information
Assistance for repairs
TroubleshootingThe electronic diagnostic codes are listed and described in Table 1.Note: Table 1 contains a list of flash codes with brief descriptions and related PID/SID-FMI codes.Some codes record events or some codes indicate that a mechanical system needs attention rather than indicating a performance problem. Troubleshooting is not required for codes "35", "41", "47" and "55". Code "01" will not flash. Some codes will limit the operation or the performance of the engine.Note: Refer to the troubleshooting manual for recommended service procedures.
Table 1
Diagnostic Flash Code Reference
Flash Code Diagnostic Code Description PID/SID – FMI
00 Engine Protection System has Shutdown Engine 71-07
00 Inlet Air Shutoff Shutdown 52-11
00 Quickstop Occurrence 84-14
00 Rated Engine Power Special Instructions 166-14
00 Outside Air Temp Sensor Voltage High 171-03
00 Outside Air Temp Sensor Voltage Low 171-04
00 No Outside Air Temp Data 171-11
00 Theft Deterrent Enabled 224-11
00 Engine Cranking with Theft Deterrent Enabled 224-14
00 J1939 Device Sending Incorrect Data 231-02
00 J1939 Device Not Responding 231-12
00 J1939 Loss of Message 231-14
00 Brake Pedal Switch #1 Fault 246-11
00 Brake Pedal Switch #2 Fault 247-11
01 Idle Shutdown Override 71-00
12 Invalid Coolant Level 111-02
12 Coolant Level Sensor Voltage High 111-03
12 Coolant Level Sensor Voltage Low 111-04
13 Fuel Temp Voltage High 174-03
13 Fuel Temp Voltage Low 174-04
14 Retarder Solenoid Low/High Voltage Low 121-05
14 Retarder Solenoid Low/High Voltage High 121-06
14 Retarder Solenoid Med/High Voltage Low 122-05
14 Retarder Solenoid Med/High Voltage High 122-06
21 8 Volt Supply Above Normal 41-03
21 8 Volt Supply Below Normal 41-04
21 5 Volt Supply Above Normal 232-03
21 5 Volt Supply Below Normal 232-04
24 Oil Pressure Sensor Voltage High 100-03
24 Oil Pressure Sensor Voltage Low 100-04
25 Boost Pressure Sensor Voltage High 102-03
25 Boost Pressure Sensor Voltage Low 102-04
25 Boost Pressure Not Responding 102-07
26 Barometric Pressure Voltage High 108-03
26 Barometric Pressure Voltage Low 108-04
26 Barometric Pressure Signal Rate of Change 108-10
27 Coolant Temperature Sensor Voltage High 110-03
27 Coolant Temperature Sensor Voltage Low 110-04
28 Accelerator Pedal Position Out of Calibration