0002967 STUD Caterpillar parts STUD
Alternative (cross code) number:
Illustration 1 g01007847
Schematic of the Machine Security System (MSS)This diagnostic code is recorded when the Machine ECM does not receive expected information from the key reader module over the data link.Test Step 1. CHECK THE ET DIAGNOSTIC SCREEN.
Check the ET diagnostic screen for a communication error between the machine ECM and the Key Reader Module.Note: The key reader communication diagnostic code is CID 1960 FMI 09.Expected Result:The ET reports CID 1960 FMI 09 as active or the diagnostic code has been logged.Results:
YES - The ET reports CID 1960 FMI 09 as active or the diagnostic code has been logged.Repair: Troubleshoot the CAN data link connections between the key reader module and the machine ECM. Proceed to Test Step 3.
NO - The diagnostic code has NOT been logged or the diagnostic is NOT active. Proceed to Test Step 2.Test Step 2. CHECK FOR POWER TO THE KEY READER MODULE.
With the key switch in the ON position, check for system voltage between pin 3 and pin 4 of the key reader module. Expected Result:The voltage that is measured is approximately system voltage.Results:
YES - The voltage that is measured is approximately system voltage. The voltage is correct. Proceed to Test Step 4.
NO - System voltage is NOT present. The wiring harness has failed.Repair: Check the wiring harness for signs of damage. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE CAN DATA LINK WIRING OF THE MACHINE HARNESS FOR AN OPEN CIRCUIT.
Disconnect the J2 harness connector from the machine ECM.
On the key reader side of the harness, install a jumper wire between pin 3 and pin 4.
At the J2 of the machine ECM, measure the resistance between pin 67 and pin 68 of the connector for the machine ECM.Expected Result:The resistance is greater than 5000 ohms.Results:
YES - The resistance is greater than 5000 ohms between pin 3 and pin 4. The wiring for the CAN link, between the ECM and the key reader module is NOT correct.Repair: Check the wiring harness for signs of damage. Repair the machine harness or replace the machine harness.STOP
NO - The resistance is less than 5 ohms between pin 3 and pin 4. The wiring is correct. Proceed to Test Step 4.Test Step 4. CHECK THE CAN DATA LINK WIRING OF THE MACHINE HARNESS