SLEEVE-CRANKSHAFT 1672153 - Caterpillar

System Operation Description:Use this procedure to troubleshoot any suspect problems with the circuit for the start relay.This procedure covers the following diagnostic codes:
444-05 Start Relay open circuit
444-06 Start Relay short to groundDuring an engine start sequence, the Starting Motor Magnetic Switch (SMMS) is used to engage the starting motor. Control input voltage for the SMMS is supplied by the control relay. When the control relay supplies the signal to the circuit, the SMMS is energized. This powers the starting solenoid and the starting motor engages.The control system will enable and disable fuel based on the "Run/Stop" input from the ECM. Fuel will be enabled when the "Run/Stop" input is active.The SMMS is de-energized when the engine speed reaches the crank terminate speed. The crank terminate speed is a system configuration parameter that is originally set at the factory. Refer to the parameter table that is found in Troubleshooting, "System Configuration Parameters" for the current setting of the parameter.Circuit protection for the SMMS is provided by a circuit breaker that is located in the secondary circuit that is between the +Battery and the input terminal for the SMMS.
Illustration 1 g01369323
Circuit schematic for the SMMS
Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the battery isolator switch to the OFF position.
Illustration 2 g01369349
Location of the J1/P1 ECM connector (typical engine view)
(1) J1/P1 ECM connector
Illustration 3 g01210527
Location of the battery isolator switch and the SMMS (typical left side engine view)
(2) Battery disconnect switch
(3) SMMS
Thoroughly inspect connector (1). Also, thoroughly inspect the connections at switches (2) and (3). Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 4 g01369351
P1 terminal locations for the run/stop switch
(P1-40) Run/Stop switch
Perform a 45 N (10 lb) pull test on each of the wires in the connectors that are associated with the circuit.
Check the torque of the allen head screws for each of the ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for corrosion, for abrasion, and for pinch points back to the ECM. Expected Result:All connectors, pins, and sockets are completely inserted and coupled. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The wiring and the connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the wiring and/or the connectors.Repair: Repair the connectors and/or the wiring. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the repair eliminates the problem.STOPTest Step 2. Check the "Run/Stop" Circuit to the Fuel Control Relay
Turn the battery isolator switch to the OFF position.
Remove the J1/P1 ECM connector and remove the connector for the EMCP.
Measure the resistance between terminal 48 of the EMCP and P1-40. The correct resistance is a short circuit condition between the two terminals.Expected Result:A short circuit condition exists for the measurement.Results:
OK - A short circuit condition exists for the measurement. The "run/stop" circuit for the fuel control relay at the