INDICATOR (converter temp.) 1W0702 - Caterpillar

Diagnostic Codes
Diagnostic codes are provided to alert the operator that a problem exists and to indicate the nature of the problem to the service technician.Diagnostic codes consist of two parts. The CID and FMI. The CID, or Component IDentifier, indicates which component in the system the diagnostic code is for. The FMI, or Failure Mode Identifier indicates what the failure mode is. Refer to Diagnostic Terminology in this section for additional details.Diagnostic codes may be viewed on an Electronic Service Tool (ET or ECAP). To troubleshoot a diagnostic code, refer to the Diagnostic Codes Cross Reference Sheet in this section under the specific code number. The code number will direct you to a procedure in Section 5: Functional Tests.Active Diagnostic Codes
An active diagnostic code represents a problem with the electronic control system that should be investigated and corrected as soon as possible. Repairing the cause of an ACTIVE diagnostic code will cause it to be cleared from ACTIVE Diagnostics Screen of an Electronic Service Tool.Logged Diagnostic Codes
When the ECM generates a diagnostic code, it usually logs the code in permanent memory within the ECM. The ECM has an internal diagnostic clock and will record the hour of the first occurrence, the hour of the last occurrence and the number of occurrences of the code.Knowing when and how often the code was generated can be a valuable indicator when troubleshooting intermittent problems.An Electronic Service Tool can retrieve and delete Logged codes. Any Logged diagnostic codes will automatically be deleted if no additional occurrences are recorded in 100 hours.When investigating logged diagnostic codes, keep in mind the following information.* Some diagnostic codes may be sensitive, and may log occurrences that did not result in operator or pilot complaints. If the time the code was logged does not correlate to a complaint, there may be nothing to fix.* The most likely cause of an intermittent problem is a faulty connection or damaged wiring. Next likely is a component failure (sensor or switch). Least likely is failure of the ECM itself.* Diagnostic codes that are logged repeatedly may indicate a problem that needs special investigation.To troubleshoot a Logged diagnostic code, refer to the Quick Reference Sheet For Diagnostic Codes in this section. The code number will direct you to a procedure in Section 5: Functional Tests. If the symptoms continue, use the proper procedure for troubleshooting the symptoms that have been experienced by the operator. Refer to Section 3: Troubleshooting Without a Diagnostic Code. Always clear logged diagnostic codes after investigating and correcting the problem which generated the code.Using ECAP To Display Active Or Logged Diagnostic Codes
1. Connect an ECAP to the Service Tool connector using the 8T5275 or 139-4166 cable.2. Turn the Engine Control Switch to the ON position, engine OFF.3. Select the Display Diagnostics/Events option from the menu.4. Each diagnostic code CID and FMI are listed on the left and followed by a text description.5. The ECAP also displays number of times the diagnostic code occurs and the engine