ENGINE AR-CORE 2298761 - Caterpillar

To follow this procedure:
Confirm the fault condition exists
Identify the conditions that may generate the fault
Eliminate faults in order of the general causeNote: In general, faults are caused by problems in the following order: physical damage, environmental damage, harness failure, component failure and Electronic Control Module (ECM) failure.Test Step 1. SET THE LANYARD
Illustration 1 g03437458
(1) Barrier Control Panel (BCP)
(2) BCP isolation switch
Move BCP isolation switch (2) to the ON position.
Illustration 2 g03437456
Plan view
(3) Lanyard
(4) Lanyard Switch
Ensure that lanyard (3) is set correctly. Reference: Refer to Troubleshooting, Testing, and Adjusting, "Lanyard Switch - Adjust".
Illustration 3 g03441916
Lanyard switch in released state
(5) Arrow
(6) Switch
(7) Marker
(8) Position "1"
Move lanyard switch (4) to position "1" (8). Expected Result:Lanyard (3) remains set in position "1" (8).Results:
YES - The lanyard remains set in position "1". Proceed to Test Step 2.
NO - The lanyard does not remain set in position "1".Repair: Replace lanyard switch (4).STOPTest Step 2. CHECK DI MODULE STATUS INDICATORS
Illustration 4 g03441936
Digital Input (DI) module located inside BCP
(9) DI module
(10) Indicator "3"
(11) Indicator "11"
Inside BCP (1), verify DI Module indicator 3 (10) and indicator 11 (11) are only illuminated when lanyard (3) is set. Expected Result:Indicator "3" (10) and indicator "11" (11) are both illuminated only when lanyard (3) is set.Results:
YES - Indicator "3" and indicator "11" are both illuminated. The lanyard switch is OKSTOP
NO - Indicator "3" and indicator "11" are not illuminated. Proceed to Test Step 3.Test Step 3. CHECK BCP DI MODULE POWER SUPPLY TO THE MACHINE BARRIER
Illustration 5 g03441956
Check the voltage at BCP DI module (9) between:
Terminal 4 (12) and ground
Terminal 12 (13) and groundExpected Result:Measure 24 V between:
Terminal 4 (12) and ground
Terminal 12 (13) and groundResults:
YES - Measured 24 V terminal 4 and ground. Measured 24 V terminal 12 and ground. Proceed to Test Step 4.
NO - Did not measure 24 V between terminal 4 and ground. Did not measure 24 V between terminal 12 and ground.Repair: Refer to Troubleshooting, Testing, and Adjusting, "Barrier Control Panel Power Circuit - Test".STOPTest Step 4. CHECK BARRIER CONTROL PANEL MACHINE BARRIER POWER SUPPLY
Move BCP isolation switch (2) to the OFF position.
Disconnect the machine barrier cable from BCP (1).
Move BCP isolation switch (2) to the ON position.
Illustration 6 g03441977
BCP DI module to machine barrier
At the machine barrier connector measure the voltage between:
Pin 6 and ground
Pin 8 and groundExpected Result:Measure 24 V between:
Pin 6 and ground
Pin 8 and groundResults:
YES - Measured 24 V between pin 6 and ground. Measured 24 V between pin 8 and ground. Proceed to Test Step 5.
NO - Did not measure 24 V between pin 6 and ground. Did not measure 24 V between pin 8 and ground.Repair: Replace BCP (1).STOPTest Step 5. CHECK BARRIER CONTROL PANEL MACHINE BARRIER INPUTS
Move BCP isolation switch (2) to the OFF position.
Illustration 7 g03441996
BCP DI module to machine barrier
(9) DI module
(14) Machine barrier connector
Measure the resistance between DI module (9) and machine barrier connector (14):
Pin 3 and terminal 11
Pin 4 and terminal 3Expected Result: The