RING-BACKUP 1622766 - Caterpillar

Connecting ECAP to ECM
The Electronic Control Analyzer Programmer (ECAP) is powered by the 24 volts DC through J13/P13 Service Tool Connector. Use the following procedure to connect to the engine Service Tool Connector.1. The ECAP may be connected to the ECM at J13. Only one side of the T harness connector cable is used. Remove the cap on J13 and replace after testing has been completed.2. Connect the opposite end of the T cable to the ECAP.3. The ECAP will operate with the engine running, or with the engine OFF, power ON. If the ECAP does not communicate with ECM, refer to Section 3:P-310:ECAP Will Not Communicate With ECM.ACTIVE Diagnostic Codes
Diagnostic codes are used by the ECM system to warn the operator of a problem and indicate to the service technician the nature of the problem. Some diagnostic codes are used only to record an event, and do not indicate problems.An ACTIVE diagnostic code represents a problem that should be investigated and corrected AS SOON AS POSSIBLE. Repairing the cause of an ACTIVE diagnostic code will cause the diagnostic code to be cleared from the ACTIVE diagnostic code screen.When an ACTIVE diagnostic code is generated, the Diagnostic Lamp will turn ON and OFF, blinking every five seconds. If the condition generating the diagnostic code occurs only for a brief moment, the Diagnostic Lamp will return to OFF after five seconds and the diagnostic code will be LOGGED. After a problem has been investigated and corrected, the related diagnostic code should be cleared from memory.Using The ECAP To Display ACTIVE Codes
A. Turn Engine Control Switch (ECS) to the OFF position, engine OFF and install an ECAP through the J13 Service Tool Connector (ATA data link).B. Turn Engine Control Switch (ECS) to the ON position, engine OFF (engine does not need to be started to view diagnostic codes).C. Refer to the Operating Manual and Special Instructions for the Electronic Service Tool (listed under Electronic Service Tools) to read the diagnostic code(s). The ECAP display menu will direct you to the proper screen to display diagnostic messages similar to the example below.ECAP Display Screen: ACTIVE Diagnostic Code Messages LOGGED Diagnostic Codes
When an ECM generates a diagnostic code, it usually logs the diagnostic code in permanent memory within the ECM. The CID-FMI and time the diagnostic code occurred (in hours on the internal diagnostic clock) is logged. The logged diagnostic codes can then be later retrieved or erased using an ECAP Electronic Service Tool. The logged diagnostic codes can be a valuable indicator when troubleshooting intermittent problems.When investigating logged diagnostic codes, remember the following information.* The most likely cause of an intermittent problem is connections or damaged wiring. Next likely is the component (sensor or BTM, for instance). Least likely is the ECM.* Some diagnostic codes represent events, not failures. (i.e. 23-02 Excessive Engine Power [48]). Passwords are required to clear these events from the log.* Some diagnostic codes are both events and failures, and are associated with the Caterpillar Engine Monitoring