Perkins electronic engines have the capability to perform a self-diagnostics test. When the system detects an active problem, a diagnostic lamp is activated. Diagnostic codes will be stored in permanent memory in the Electronic Control Module (ECM). The diagnostic codes can be retrieved by using the electronic service tool. Refer to Troubleshooting , “Electronic Service Tools” for further information.
Some installations have electronic displays that provide direct readouts of the engine diagnostic codes. Refer to the manual that is provided by the OEM for more information on retrieving engine diagnostic codes. Alternatively refer to Troubleshooting , “Indicator Lamps” for further information.
Perkins 1206E-E70TTA Diagnostic Lamp
A diagnostic lamp is used to indicate the existence of an active fault. Refer to Troubleshooting , “Indicator Lamps” for more information. A fault diagnostic code will remain active until the problem is repaired. The diagnostic code may be retrieved by using the electronic service tool. Refer to Troubleshooting, “Electronic Service Tools” for more information.
Perkins 1206E-E70TTA Diagnostic Flash Code Retrieval
In order to read the diagnostic flash codes through the diagnostic lamp, cycle the key switch from off to on twice within 3 seconds. The codes will be flashing in sequence. For example if the flash code equals 133, the diagnostic lamp will flash once, pause, flash three times, pause, and flash three times. After the complete code has flashed, a 3 second pause will take place before the next code will begin to flash (if another code is present). Note: For more information refer to Troubleshooting manual.
Perkins 1206E-E70TTA Fault Logging
The system provides the capability of Fault Logging. When the Electronic Control Module (ECM) generates an active diagnostic code, the code will be logged in the memory of the ECM. The codes that have been logged by the ECM can be identified by the electronic service tool. The active codes that have been logged will be cleared when the fault has been rectified or the fault is no longer active. The following logged faults can not be cleared from the memory of the ECM without using a factory password: Overspeed, low engine oil pressure, and high engine coolant temperature.
Perkins 1206E-E70TTA Cooling System Water Temperature Regulator - Replace
Replace the water temperature regulator before the water temperature regulator fails. This is a recommended preventive maintenance practice. Replacing the water temperature regulator reduces the chances for unscheduled downtime. Refer to this Operation and Maintenance Manual, “Maintenance Interval Schedule” for the proper maintenance interval.
A water temperature regulator that fails in a partially opened position can cause overheating or overcooling of the engine. A water temperature regulator that fails in the closed
position can cause excessive overheating. Excessive overheating could result in cracking of the cylinder head or piston seizure problems.
A water temperature regulator that fails in the open position will cause the engine operating temperature to be too low during partial load operation. Low engine operating temperatures during partial loads could cause an excessive carbon buildup inside the cylinders. This excessive carbon buildup could result in an accelerated wear of the piston rings and wear of the cylinder liner.