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Using The ECAP Or DDT To Display ACTIVE Codes
A. With key OFF, install an ECAP or DDT into the PEEC III system.B. Turn key ON (engine does not need to be started to view codes).C. Refer to the Operating Manual and Special Instructions for the service tool (listed under PEEC III Service Tools) to read the code(s). On the ECAP, the display menu will direct you to the proper screen to display diagnostic messages similar to the example below.Using The Cruise Control Switches To Display ACTIVE Codes:
A. Turn key ON (engine does not need to be started to view codes).B. The PEEC III Diagnostic Lamp will turn ON for five seconds, blink OFF for 1/10 second, turn ON again for five seconds, then OFF for five seconds. At the end of that time, the lamp will begin to flash the first number of the two-digit code (count the flashes). After two seconds OFF, then it will flash the second digit. If two or more codes are present, they will follow the first after a few seconds and be displayed in the same manner.C. Active Diagnostic codes may be displayed at any time by using cruise control switches. With key ON or engine running, turn the cruise control ON/OFF switch to OFF, and move the SET/RESUME switch to RESUME position. Once the codes begin to flash the switch may be released. The PEEC III Diagnostic Lamp will flash out all the codes that are currently active, or intermittent codes that have occurred since the key was turned on. LOGGED Diagnostic Codes
When an ECM generates a diagnostic code, it usually logs the code in permanent memory within the ECM. The time the code occurred (in hours on the internal diagnostic clock) is logged along with the code. The logged codes can then be later retrieved or erased using an ECAP or DDT service tool. They can be a valuable indicator when troubleshooting intermittent problems.When investigating Logged diagnostic codes, keep in mind:* 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 codes represent "events", not failures. These codes are 23-02 Excessive Engine Power(48), 71-00 Idle Shutdown Override(01), 71-01 Idle Shutdown Occurrence (47), 84-00 Vehicle Overspeed Warning(41), and 190-00 Engine Overspeed Warning(35). Passwords are required to clear these faults from the log. An example of a "Logged Event" is below.* Some codes are both events and faults and are associated with Caterpillar Engine Protection. These codes are 100-01 Low Oil Pressure Warning(46), 100-11 Very Low Oil Pressure Warning(46), 110-00 High Coolant Temp. Warning(61), 110-11 Very High Coolant Temp. Warning(61), 111-01 Low Coolant Level Warning(62), and 111-11 Very Low Coolant Level Warning. Passwords are required to clear these events and faults from the log.* Codes not requiring passwords to clear are automatically deleted after 100 ECM hours.To troubleshoot a logged diagnostic code, refer to the procedure in this manual for troubleshooting the specific code first (Troubleshooting With A Diagnostic Code). If symptoms continue, use the procedure for troubleshooting symptoms (See Section 3: Troubleshooting Without A Diagnostic Code).Using The ECAP Or DDT To Display Logged Codes:
With key ON or engine running, follow the directions of the Operating Manual and Special Instructions for ECAP or DDT (listed under PEEC III Service Tools) to view the codes. The ECAP menu will direct you to the proper screen to display logged diagnostic messages.Using The ECAP Or DDT To Clear Logged Codes:
Follow directions in the Operating Manual and Special Instructions for ECAP or DDT to clear logged codes. The ECAP menu will direct you to the proper screen to clear logged diagnostic codes, similar to the example below.Example ECAP Screen: "Logged Faults" Example ECAP Screen: "Logged Events" Diagnostic Terminology
Parameter Identifier (PID)
Two or three digit code which is assigned to each component or system.Failure Mode Identifier (FMI)
Type of failure the component experienced (adopted from SAE standard practice J1587 diagnostics).Flash Code (FC)
Caterpillar proprietary code numbers which when ACTIVE are flashed out on the PEEC III diagnostic lamp. Diagnostic Codes Cross-Reference Indexed By PID-FMI
Diagnostic Codes Cross-Reference Indexed By Flash Code