SHAFT AS-PUMP 8S0493 - Caterpillar

MID PCP MID 1817 FMI 09Conditions Which Generate This Code:There is a loss of communications with the electronic troll processor. The power train control processor (PCP) and the electronic troll processor (ETP) do not communicate.Note: The PCP 1817 - FMI 09 diagnostic code becomes active when the Backup panel is activated. This is a normal condition and does not indicate a loss of J1939 communications.Note: The PCP and the ETP communicate on the J1939 data link.Perform this procedure if a 1326-09 diagnostic code is active.If an 1817-09 diagnostic code is active at the same time that a 1326-09 diagnostic code is active, go to Troubleshooting, "PCP CID 1326 - FMI 09".Test Step 1. CHECK THE ELECTRICAL CONNECTIONS AND WIRING.
Inspect the harnesses between the ETP and the ECM. Inspect the harnesses for the following conditions:
Corrosion
Abrasion
Pinch points
Incorrect attachmentExpected Result:All harnesses are in good condition.Results:
OK - All harnesses are in good condition. Go to Test Step 2.
NOT OK - All harnesses ARE NOT in good condition.Repair: Repair the harnesses or replace the harnesses. Verify that the diagnostic code is NOT active.STOPTest Step 2. ENSURE THAT THE NUMBER OF TERMINATING RESISTORS IS CORRECT.
Ensure that there is only one terminating resistor connected at the TEE connector for the ETP.
Ensure that there is only one terminating resistor connected at the display/J1939 data link. The second terminating resistor is connected to the TEE connector that is on the last display. There are two terminating resistors connected to the data link. One terminating resistor is placed at the ETP TEE connector. The second terminating resistor is placed on the last display on the data link for the J1939 display.Expected Result:The proper number of terminating resistors is present.Results:
OK - The proper number of terminating resistors is present. Go to Test Step 3.
NOT OK - The proper number of terminating resistors IS NOT present.Repair: Install the proper number of terminating resistors.STOPTest Step 3. MEASURE THE VOLTAGE AT THE CONNECTOR FOR THE ETP.
Ensure that the keyswitch is OFF.
Disconnect the data link cable from the ETP.
Turn the keyswitch ON.
Use a digital volt meter (DVM) in order to measure the voltage between pin 1 and pin 2. Expected Result:The voltage is between 22 VDC and 27 VDC for a 24 VDC system. The voltage is between 11