STEP AS 2456103 - Caterpillar

diagnostic code is recorded when the VIMS main module reads the voltage of the keypad data link and the voltage is below normal. The keypad data link circuit is shorted to ground.
DISCONNECT THE KEYPAD.
Disconnect the VIMS keypad module from the machine harness.
Check whether the diagnostic code CID 0820 FMI 06 is active. Expected Results:The diagnostic code CID 0820 FMI 06 is active. Results:
OK - Diagnostic code remains active. Proceed to 2.
NOT OK - Diagnostic code is not active. Check the connector of the keypad for proper connections. Reconnect the VIMS keypad module to the machine harness. If the diagnostic code CID 0820 FMI 06 is active, then replace the VIMS main module. STOP.
CHECK FOR SHORT TO GROUND
Turn the key start switch and the disconnect switch to the OFFposition.
Disconnect the machine harness from the VIMS main module and the display modules.
Measure the resistance at the machine harness connector for the VIMS main module between frame ground and the Keypad Data Link circuit connector contact 29.Expected Results:The Resistance is greater than 5000 ohms.Results:
OK - Resistance is greater than 5000 ohms. The harness circuit resistance is correct. The VIMS main module has failed. Replace the VIMS module. Refer to the Testing and Adjusting, "Module-Replace" section. STOP.
NOT OK - Resistance is less than 5000 ohms. The machine harness has failed. The keypad data link is shorted to ground. Repair the machine harness or replace the machine harness. STOP.