DOOR AS-CAB 2548589 - Caterpillar

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Schematic for the fast idle enable switchOCT01 SoftwareOCT01 and newer Personality Module Software also offers an alternative output that can be used for a fast idle lamp. The parameter "Output #9" is not used in the OCT01 software. The parameter "Fast Idle Lamp" has been added. "Fast Idle Lamp" can be programmed to "J1/P1:31" output 9, "J1/P1:21" output 8, or "None".
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Schematic for the fast idle enable switch (OCT01 Option)Test Step 1. Inspect Electrical Connectors and Wiring.
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Location of Output 8 and Output 9
Thoroughly inspect ECM vehicle harness connector J1/P1, the firewall bulkhead connector, and the terminals for the fast idle lamp.Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the fast idle lamp.
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: 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.STOPTest Step 2. Check for Normal Operation of the Fast Idle Lamp.
Verify that a fast idle enable switch is installed.
Connect ET.
Turn the ignition key switch to the ON position.
Access the ET status screen. Verify that the following switches indicate the correct status:
The service brake switch 1 is off.
The service brake switch 2 is off.
The neutral switch is on.
The clutch switch is off.If any of the switches do not display the indicated status, fast idle will not activate.
Use the ET status screen to monitor the fast idle switch and the fast idle rpm.
Depress the fast idle switch while the status of the fast idle enable switch is being observed. Also observe the fast idle lamp. Release the fast idle switch. The fast idle lamp should turn on when the fast idle switch is pressed and released.
Depress the service brake pedal. The fast idle lamp should turn off when the service brake is applied.Expected Result:The switch status changes per the above information. The fast idle lamp turns on and the fast idle lamp turns off per the description above.Results:
Yes - The fast idle lamp is operating normally.STOP
No - The ECM is not reading the switch status change. Proceed to Test Step 3.Test Step 3. Test the Fast Idle Lamp Circuit.
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Pin locations
Turn the ignition key switch to the OFF position.
Fabricate a jumper wire 100 mm (4 inch) long. Crimp a Deutsch pin to both ends of the wires.
Disconnect vehicle harness connector P1 from the ECM.
Insert the jumper into P1:31. Note: For OCT01 and newer Personality Module Software, insert the jumper into P1:31 or P1:21.