RING-RETAINING 1W0565 - Caterpillar

System Operation Description:The engine has a Primary Electronic Control Module (ECM) and a Secondary Electronic Control Module (ECM). The electrical power to the primary ECM comes through the breaker for the primary ECM and the contact of relay "R2A". The electrical power to the secondary ECM comes through the breaker for the secondary ECM and the contact of relay "R2". Power goes to pin P1-53 and pin P1-52 of the ECM(s). The −Battery comes through the breakers for the primary ECM and the secondary ECM. The −Battery connects to pin P1-63 and pin P1-65 of the ECM(s). The Engine Control Switch (ECS) sends a signal to pin P1-70 on the primary ECM and to pin P2-70 on the secondary ECM when the ECS is in the following positions: REMOTE, STOP and START. When the primary ECM senses battery voltage on pin P1-70 of the primary ECM, the primary ECM will power up. When the secondary ECM senses battery voltage on pin P2-70 of the secondary ECM, the secondary ECM will power up. When the ECS is in the OFF/RESET position, voltage is not present on these inputs and the ECM(s) will power down.If an emergency shutdown occurs, circuitry will energize relay "R2" and relay "R2A". When these two relays are energized the contacts of the relays will open. When the contacts of the relays open, battery power is removed from the ECM(s).In order to restart the engine, the operator must correct the cause of the emergency shutdown. The Engine Control Switch (ECS) must be turned to the OFF/RESET position. This resets the electrical circuits in the circuit. In addition to turning the ECS to the OFF/RESET position, the operator must manually open the air shutoff valves before starting the engine.The presence of two +Battery connections and two −Battery connections to the ECM reduce harness resistance. All of these connections must be complete in order to ensure proper engine operation.
Illustration 1 g01029806
Typical exampleNote: If a remotestart switch is installed, the remote start switch must be in the LOCAL position for this test. Test Step 1. Check for Connector Damage.
Turn the ECS to the OFF/RESET position.
Turn the circuit breaker for the battery to the OFF position.
Verify that the circuit breakers are not tripped.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6 1 N m (53 9 lb in).
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion or of pinch points.Results:
OK - The connectors and wiring are okay. Proceed to Test Step 2.
Not OK - The connectors and/or wiring need repair.Repair: Repair the connectors or