STEM ASSEM (STRAIGHT) 8C5234 - Caterpillar

In order to service a machine ECM/controller, a specific "P1D" file name must be selected. Certain machines will automatically display the required "P1D" file name (8). If the P1D file name is not displayed (7), select the blue "here" (9) link for a list of machine model "P1D" files. Match the machine serial number prefix to the "P1D" file name. Take note of the exact "P1D" file name with spaces, upper, and lower case letters, this is important.
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Note: "P1D" Diagnostic Files are located at: C: \PLUS+1\CAT Diagnostic Files
Select the folder icon (10). A new window will open to the PLUS+1 folder. Select and open the "Cat Diagnostic Files" (11) folder. Select the "P1D" (12) file name for your machine. Select "Open". Allow P1STC to reconnect to the machine with the diagnostic file name chosen.
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"Loading Diagnostic File (Not Responding)" message
A message pop-up window stating "Loading Diagnostic File (Not Responding)", is the windows default message while P1STC is reestablishing communication with the machine ECM/Controller. This situation is normal. This connection can take up to 5 minutes to connect.Note: If problems/malfunctions occur during service, you may have selected the wrong P1D file. Close the P1STC program and repeat the connection procedure with the correct P1D file that matches the machine serial number prefix
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Tool Bar Icons description (13) Status (14) Active Diagnostics (15) Logged Diagnostics (16) Active Events (17) Logged Events (18) ECM Summary (19) Configurations (20) Online Mode (21) Offline Mode (22) Flash (23) Calibrations (24) Current Totals (25) Menu (26) Help Contents (27) Exit
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Service Tool "Available ECMs" screenThe available ECMs will be listed along with ECM serials numbers and part numbers as shown in Illustration 13.Note: The following sections describe the general capability of the diagnostic file. The actual information will vary with ECM software and the release levels of the diagnostic files.Reviewing Active Diagnostics
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Typical "Active Diagnostics" shown in the Service Tool screenActive Diagnostics can be found by reviewing the "Active Codes" pages.For a complete list of Trouble Codes refer to Troubleshooting, "Diagnostic Trouble Code List".Note: In general for ECM output signals, the ECM declares a fault if the opposite state is detected. The following examples will record a fault by the ECM:
Output is not active, but the ECM detects a short to the battery.
Output is active, but the ECM detects a short to ground.Advisor
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Typical screen of the Advisor for accessing "Diagnostics"Perform the following in order to access the Diagnostics screen from the Service Menu:
Use the appropriate Arrow button in order to highlight the Diagnostics option.
Press the buttons on the LH and RH sides in order to access the "Diagnostics" screen.
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Typical "Active Diagnostic" screen
Select "Active Events" to show a list of Active Diagnostics.
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Typical "Logged Diagnostic" screen
Select "Logged Events" to show a list of Logged Diagnostic Codes.Each line in each list shows the following:
Component Description
Warning LevelThe display also shows the following:Perform the following in order to access the codes and events from the Diagnotics screen:
Use the appropriate Arrow button to highlight a