HEAD 8J0136 - Caterpillar

Illustration 1 g00533879
Illustration 2 g00543569
Use the following procedure when a diagnostic code is detected. When a diagnostic code is detected, the "SERV CODE" indicator is shown in the Display Area when the Main Display Module is in Normal Mode.
Enter the Service Mode (Mode 2).
A single diagnostic code is shown and the diagnostic code is on hold at this time. The display toggles between the MID and CID FMI. Nothing is shown in the Display Area for the MID when there are no active diagnostic codes. The Display Area does not toggle in order to show information about the CID FMI.
In order to see all diagnostic codes, use the "SCROLL" switch to scroll through the diagnostic codes. The Display Area momentarily shows the MID. Then, the CID FMI replaces the MID. Toggle the "SCROLL" switch in order to see the diagnostic codes in succession. "End" is shown in the Display Area after the last diagnostic code has been shown.
Place the desired diagnostic code on hold. The diagnostic code is placed on hold by releasing the "SCROLL" switch.
Make sure that the MID 030 is displayed.
Observe the "SERV CODE" indicator.
If the "SERV CODE" indicator is ON, then the diagnostic code that is shown is active.
If the "SERV CODE" indicator is OFF, then the diagnostic code that is shown is logged. The diagnostic code was active. The diagnostic code then became inactive. Finally, the diagnostic code was logged into memory. This may or may not indicate an intermittent condition.
In order to troubleshoot the diagnostic code, go to the procedure with the CID FMI.
After a diagnostic code is corrected or the diagnostic code is not needed, clear the diagnostic code with the "CLEAR" switch. After clearing, the Display Area advances to the next available diagnostic code.
Repeat Step 2 through Step 8 for the remaining diagnostic codes. Return the Main Display Module to Normal Mode when all of the diagnostic codes are cleared.