SWITCH AS-TEMPERATURE 8T8638 - Caterpillar

LCD Display
Perform the following steps in order to determine diagnostic codes:
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(1) "Four Way" button
(2) "OK" button
(3) "Back to Previous Screen" button
(4) Return to Main Menu
Press the "Menu" button (5) in order to view the "Main Menu".
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LCD Display - Main Menu
At the main menu page, scroll to the "Service" menu option with the "Four Way" button (1) and press the "OK" button (2).
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LCD Display - Service Menu
At the service menu page, the first option will be "Diagnostics". Press "OK" (2) to view the list of "Active" codes and "Logged" codes.
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The "Service Diagnostics" screen will display the active and logged diagnostic codes. The "Service Diagnostics" screen will also display the active and logged event codes. Select the desired diagnostic code or the desired event code and press the "OK" button (2). The Diagnostic Detail Screen for the selected code or event will appear.
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LCD Display - Diagnostic and Event Details
The detail screen will display the following Diagnostic and Event Details:
CID-FMI or EID-WCI
A description of the failed component
The failure type
Name of the Reporting System Using Cat® Electronic Technician (Cat ET) Service Tool to Determine Diagnostic Trouble Codes
Connect Cat® Electronic Technician (Cat ET) Service Tool to the machine. Turn the key start switch to the RUN position. Start Cat ET. Cat ET will initiate communications with the (ECMs) Electronic Control Modules on the machine. After communication has been established, Cat ET will list the ECMs. Choose the desired ECM. After the diagnostic trouble codes have been determined with Cat ET, see the test procedure for the corresponding diagnostic trouble code.Reference: Troubleshooting, "Service Tools"Active Diagnostic Trouble Codes
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Typical Cat® Electronic Technician (Cat ET) Service Tool screen for active diagnostic trouble codes.
The following procedures may cause new diagnostic trouble codes to be logged. Therefore, before any procedures are performed, make a list of all the active diagnostic trouble codes to determine the system problems. When each procedure is complete, clear the diagnostic trouble codes that were caused by the procedure.Note: Before performing a procedure, always check all the circuit breakers. Repair the cause of any circuit breaker that is tripped.A screen is provided in Cat ET for active diagnostic trouble codes. The screen will display the active diagnostic trouble codes. Active diagnostic information shall include a component identifier (CID), a failure mode identifier (FMI), and a text description of the problem.Logged Diagnostic Trouble Codes
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Typical Cat ET screen for logged diagnostic trouble codes.
A screen is provided in Cat ET for logged diagnostic trouble codes. Cat ET will log diagnostic trouble codes that are intermittent. The logged diagnostic data shall include a CID, an FMI, and a text description of the problem. Also, the logged diagnostic data shall include the number of occurrences of the problem and two time stamps. The time stamps display the first occurrence of the problem and the most recent occurrence of the problem.Diagnostics are logged in non-volatile memory. On powerup, the ECU will clear any diagnostic trouble codes that have not been detected or active within