RING 3727343 - Caterpillar

Illustration 1 g00836404
Typical exampleTest Step 1. Check for Connector Damage.
Turn the Engine Control Switch (ECS) to the OFF/RESET position.
Turn the battery disconnect switch to the OFF position.
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 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 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. 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 are not okay.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 2. Check the Current Input.
Measure the current to the signal converter.Note: Some external governors may only be able to output approximately 150 mA. This should not be seen as a problem with the external governor.Expected Result:The current range is between 0 and 200 mA.Results:
OK - The current is within the correct range. Proceed to Test Step 3.
Not OK - The current is not within the correct range.Repair: Replace the external governor that is supplying the controlling current.STOPTest Step 3. Check the Voltage at the Battery.
Turn the circuit breaker for the battery to the ON position.
Connect one probe of the voltmeter to +Battery terminal.
Connect one probe of the voltmeter to −Battery terminal.Expected Result:The voltage measures 24 3 VDC.Results:
OK - The voltage measures 24 3 VDC. Proceed to Test Step 4.
Not OK - The voltage does not measure 24 3 VDC.Repair: There is a problem with the battery or with the connections at the battery. Repair the connections or the battery.STOPTest Step 4. Check the Voltage at the Signal Converter.
Connect one probe of the voltmeter to the +Battery terminal at the signal converter.
Connect one probe of the voltmeter to the −Battery terminal at the signal converter.Expected Result:The voltage measures 24 3 VDC.Results:
OK - The voltage measures 24 3 VDC. Proceed to Test Step 5.
Not OK - The voltage does not measure 24 3 VDC.Repair: Check the wiring and/or the connectors that are between the battery and the signal converter. Repair the wiring and/or connectors.STOPTest Step 5. Check the Desired Fuel Position.
Connect the Caterpillar Electronic Technician (ET) to the service tool connector J60. Start Cat ET.
Turn the ECS to the STOP position.
Observe the throttle position reading on Cat ET.
Vary the current to the signal converter.Expected Result:The throttle position on Cat ET varies from 5 percent to 85 percent as the current input is adjusted from 0 mA to 200 mA.Results:
OK - The throttle position on Cat