IDLER AS 5I7611 - Caterpillar

System Operation Description:Use this procedure under the following situation:Use this procedure in order to determine if the circuit for the Engine Running Output is operating properly.The following background information is related to this procedure:The Engine Running Output is located on ECM J1/P1:13 (Output 4).The engine running output comes on when the engine is running. The ECM can be connected to a relay that disables the starter. The relay is normally closed so cranking can be achieved immediately at powerup. During cranking, the ECM energizes the engine running output once the engine reaches 50 rpm below the programmed low idle. The output is de-energized if the engine speed falls below 100 rpm. The low idle rpm is programmable. The range for low idle is between 700 rpm and 800 rpm.
Illustration 1 g00832285
Engine Running Output Circuit
Illustration 2 g00832305
Location for the ECM terminalTest Step 1. Inspect Electrical Connectors and Wiring
Thoroughly inspect ECM vehicle harness connector J1/P1, and the firewall bulkhead connector.Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on terminal 13 in the ECM connector.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the harness and wiring for abrasion and for pinch points from the sensor to the ECM.Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Perform the following repair:Repair the connectors or wiring and/or replace the connectors or wiring. 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. Stop.Test Step 2. Use the Caterpillar Electronic Technician (Cat ET) to Check the Relay
Connect Cat ET to the data link connector.
Turn the ignition key switch to the ON position.
Access the special test "Engine Running Output" on Cat ET. The "Engine Running Output" test will enable the engine running output when the test is active.
Begin the "Engine Running Output" test and listen for the relay to click. You may need to be near the engine in order to hear the click.Expected Result:The relay activates when the special test is enabled.Results:
Yes - The ECM and vehicle components are operating correctly. Stop.
No - Proceed to Test Step 3.Test Step 3. Use Cat ET to Check the ECM
Connect Cat ET to the data link connector.
Turn the ignition key switch to the OFF position.
Disconnect the ECM vehicle harness connector J1/P1.
Connect a breakout T between ECM connectors J1 and P1.
Connect a voltage test lamp to terminal 13 (Output 4) and terminal 65 (-battery) of the breakout T.
Turn the ignition key switch to the ON position.
Access the special test "Engine Running Output" on Cat ET.
Cycle the special test "Engine Running Output" to "Active" and to "Not Active" and watch the voltage test lamp.
Stop the special test.Note: A multimeter can not be used in place of the voltage test lamp when the ECM