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Caterpillar — (7) Upper LCD display

A Caterpillar service procedure — check it applies to your exact model before use.

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Procedure

  1. 1. Determine the LED display that is active on the left side of the PRCM (1), (2), or (3).
  2. 2. View the diagnostic code on upper display (7) of the PRCM. If necessary, press the “MODE” button in order to obtain the Diagnostic Code

Source: manual:PRC Mod SENR6588-03.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.