24H Motor Grader Transmission Electronic Control System And Hydraulic Calibrations Caterpillar

The following instructions are used to access information regarding the Transmission Electronic Control System only. Refer to Systems Operation, "Caterpillar Monitoring System" to learn about the different modes and display area operation. Use the Testing And Adjusting portion of THIS MANUAL to troubleshoot the faults for the Transmission Electronic Control System. While Caterpillar Monitoring System is in normal mode, a flashing transmission system indicator (4) identifies that a fault (service code) is present in the Transmission Electronic Control System.

Illustration 1	g00490989
Digital Readout Area (7) First display. (8) Second display. (9) Module identifier (MID). (10) Service code indicator (SERV CODE). (11) Component identifier (CID). (12) Failure mode identifier (FMI).

Note: The display that is seen on earlier models is shown in the following illustration. A fourth digit has been added to the CID display and a decimal point "." has replaced the "F" which precedes the FMI display.

Illustration 2	g00490890
Digital Readout Area (13) First display. (14) Second display. (15) Module identifier (MID). (16) Service code indicator (SERV CODE). (17) Component identifier (CID). (18) Failure mode identifier (FMI).

Note: When the Caterpillar Monitoring System is in the normal mode and the hourmeter symbol is showing, remember the following points:

• The service code indicator shows "SERV CODE" when any fault is present. This includes Caterpillar Monitoring System faults or Transmission Electronic Control System.

Use the following procedure to troubleshoot the service code information. Connect the 4C-8195 Service Tool to the monitor service connector.

1. Place the Caterpillar Monitoring System in service mode. Press and hold the "SERVICE" switch and the "CLEAR" switch. Release the switches while the mode number "-3-" is shown on the display. This will place the system in service mode.

   Note: The diagnostic scrolling mode may be entered to see the service codes, but the service codes can be more easily diagnosed using the service mode. The service mode allows the service codes to be placed on hold for further investigation. The service mode also allows the services codes to be cleared when the problem has been fixed.

2. A service code is shown and is on hold at this time. The display toggles between showing MID (9) and CID (11) and FMI (12). When there are no service codes while in the service mode, screen (7) shows "---".

3. In order to view all the service codes, scroll through the service codes. In order to scroll through the service codes, press and hold the "SERVICE" switch. The display momentarily shows MID (9), CID (11) and FMI (12) for each service code. The word "End" is shown after the last service code in the list.

   Note: The following procedures may cause some new faults to be logged. Therefore, record all service codes before you perform any procedures. As each procedure is completed, clear the service codes that were caused by the procedure.

4. Place the desired service code on hold. In order to place the service code on hold, release the "SERVICE" switch while the desired service code is shown.

5. Use the MID information to determine which electronic control system is generating the service code. If the MID is not "081", see Electrical System Schematic, "Module Identifier (MID) Table" of the machine that is being serviced. Use the table to determine which electronic control detected the fault. Then see the service manual module for that electronic control. The MID for the Caterpillar Monitoring System is "030". If the MID is "081", use this Service Manual to troubleshoot the fault that generated the service code.

6. Observe service code indicator (10). In service mode the service code indicator functions as a fault present indicator.
   • If fault present indicator (10) shows "SERV CODE", then the fault that caused the service code that is shown is currently present.

   • If fault present indicator (10) is OFF, then the fault that caused the service code that is shown is not present at this time.

7. See the corresponding test in order to troubleshoot the service code with the same CID and the same FMI. Use the Service Manual for the Electronic Control Module (ECM) that is generating the service code.

8. After a service code is corrected, clear the service code. Before clearing ensure that all harness connectors have been reconnected and that all wire insulation punctures have been repaired. In order to clear the service code, press the "CLEAR" switch while the service code is on hold. After clearing, the display advances to the next available service code.

9. Repeat Steps 2 through 8 for the remaining service codes. Return to the normal mode when you are finished. Press and hold the "SERVICE" switch and "CLEAR" switch. Release the switches when the display is showing normal information (hourmeter).