F5H080 TWIN SYNCHRO-DRIVE CONTROL BOX Force
H0257F88A, H0257F88B, H0352F90B, H0352F90C, H0353E91A, H0353E91B, H0356F89B, H0357C87A, H0357C88B, H0357F88A, H0357F89C, H0357G90A, H0457H82N, H0457H83P, H0504H88C, H0504H88D, H0504P89B, H0505C89B, H0507A89C, H0507A89D, H0507A90A, H0507A90B, H0507A90
TWIN
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Compatible models:
H0257F88A
H0257F88B
H0352F90B
H0352F90C
H0353E91A
H0353E91B
H0356F89B
H0357C87A
H0357C88B
H0357F88A
H0357F89C
H0357G90A
H0457H82N
H0457H83P
H0504H88C
H0504H88D
H0504P89B
H0505C89B
H0507A89C
H0507A89D
H0507A90A
H0507A90B
H0507A90C
H0507A90D
H0507A91A
H0507A91C
H0507A92A
H0507C88B
H0507Z89B
H0558H79L
H0559B80M
H0559H80N
H0559H83R
H0606H84A
H0700H79A
H0709B79A
H0750H79A
H0756H80F
H0756H81G
H0756H82H
H0757B79E
H0758H80B
H0758H82E
H0759H79A
H0850H81C
H0851X88A
H0853F88B
H0853F89C
H0853F89E
H0853F89F
H0853F89G
H0856A89A
H0856A89H
H0856C87A
H0856C87B
H0856F84A
H0856F85A
H0856F86A
H0856H82K
H0856L89D
H0856Y89B
H0857H79G
H0858B82E
H0858C84H
H0903E91D
H0903F90B
H0903F90C
H0903F91A
H0903F91C
H0906A90A
H0906R83D
H1000H79A
H1004H79A
H1006B80B
H1006B81C
H1007H79A
H1008H80A
H1008H83C
H1057B78H
H1058H82G
H1058V83H
H1150H79A
H1151H79A
H1154B79A
H1155H79A
H1156H80C
H1156H81D
H1157B79B
H1157H78A
H1158B82E
H1158H84G
H1159H77A
H1159H78B
H1159H79C
H1251A88A
H1251A88B
H1251A88C
H1251A89A
H1251A89B
H1251A89C
H1251A89D
H1251A89E
H1251F84A
H1251F86A
H1251F87A
H1251F87B
H1251X85A
H1258H81A
H1400H79A
H1401H79A
H1405H79A
H1406H80C
H1406H81D
H1407B79B
H1408B80C
H1408H82D
H1408H83E
H1409H79B
Force
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- ACCESSORIES » F5H080
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- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
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- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- SPECIAL TOOLS - ACCESSORIES » F5H080
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- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
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- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
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- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
- ACCESSORIES » F5H080
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Information:
Illustration 1 g01215112
Schematic for engine shutdown switchTest Step 1. Inspect the Electrical Connectors and the Wiring
Remove the electrical power from the ECM.
Illustration 2 g01141049
(J1/P1) ECM connectors
Thoroughly inspect the J1/P1 ECM connectors and the connectors for the engine shutdown switch. Also inspect each of the machine connectors that are in the circuit. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g01141085
P1 ECM connector (P1-5) Digital sensor return (P1-23) Engine shutdown switch (N/C) (P1-40) Engine shutdown switch (N/O)
Illustration 4 g01199874
Machine connector (Terminal 23) Digital sensor return (Terminal 27) Engine shutdown switch (N/O) (Terminal 28) Engine shutdown switch (N/C)
Illustration 5 g01195481
Engine shutdown switch connector (1) Engine shutdown switch (N/O) (2) Digital sensor return (3) Engine shutdown switch (N/C)
Perform a 45 N (10 lb) pull test on each of the wires for the engine shutdown switch.
Check the torque of the allen head screw on the ECM connectors. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
Check the harness and the wiring for abrasion and for pinch points from the switch back to the ECM.Expected Result:All of the connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and the connectors appear to be OK. Proceed to Test Step 3.
Not OK - There is a problem with the connectors and/or wiring.Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. 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 Active Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Restore the electrical power to the ECM.
Check the "Active Diagnostic Codes" screen for a 267-02 diagnostic code. Toggle the engine shutdown switch and monitor Cat ET for the active diagnostic code. Wait at least 30 seconds so that any codes may become active.
Remove the electrical power from the ECM.Expected Result:An 02 diagnostic code is not active.Results:
OK - The code does not become active.Repair: The switch is operating normally. There may be an intermittent problem in the wiring harness or in a connector. Check the wiring harness and the connectors for an intermittent electrical problem. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - An 02 diagnostic code is active. Proceed to Test Step 3.Test Step 3. Check the Resistance of the Switch Circuit at the ECM Connector
Place the engine shutdown switch in the RUN position. Ensure that the electrical power is removed from the engine ECM.
Disconnect the P1 connector.Note: Wiggle the harnesses during the following measurements in order to detect any intermittent problems.
Measure the resistance between terminals P1-5 (digital return) and P1-23 (engine shutdown switch (N/C)). The correct resistance measurement indicates a short circuit.
Measure the resistance between terminals P1-5 (digital return) and P1-40 (engine shutdown switch (N/O)). The correct resistance measurement indicates a open circuit.
Toggle the engine shutdown switch to the STOP position.
Measure the resistance between terminals P1-5 (digital return) and P1-23 (engine shutdown switch (N/C)). The correct resistance measurement indicates a open circuit.
Measure the resistance between terminals P1-5 (digital return) and P1-40 (engine shutdown switch (N/O)). The correct resistance measurement indicates a short circuit.
Connect the J1/P1 connectors.Expected Result:The resistance measurements are within the specifications.Results:
OK - All of the resistance measurements are within the specifications.Repair: Perform the following procedure:
Restore the electrical power to the ECM.
Use Cat ET to check for the active 267-02 code again. Toggle the engine shutdown switch and check for the code. Also, wiggle the switch harness from the switch to the ECM in order to reveal an intermittent problem.If the code does not recur, the problem is resolved. The original problem was probably caused by a poor electrical connection.If the code recurs, the ECM is not detecting the switch inputs correctly. Replace the ECM. Refer to electronic troubleshooting Troubleshooting, "Replacing the ECM".STOP
Not OK - At least one of the resistance measurements is not within specifications. There is a problem in the switch or in a harness. Proceed to Test Step 4.Test Step 4. Check the Operation of the Engine Shutdown Switch
Disconnect the connectors for the engine shutdown switch.
Place the engine shutdown switch in the RUN position.
Measure the resistance between terminals 2 (digital return) and 1 (engine shutdown switch (N/O)). The correct resistance measurement indicates an open circuit.
Measure the resistance between terminals 3 (engine shutdown switch (N/C)) and 2 (digital return). The correct resistance measurement indicates a short circuit.
Toggle the engine shutdown switch to the STOP position.
Measure the resistance between 3 (engine shutdown switch (N/C)) and 2 (digital return). The correct resistance measurement indicates an open circuit.
Measure the resistance between 2 (digital return) and 1 (engine shutdown switch (N/O)). The correct resistance measurement indicates a short circuit.Expected Result:The resistance measurements are within the specifications.Results:
OK - All of the resistance measurements are within the specifications.Repair: The switch is OK. There is a problem in the wiring harness or the connectors. Check the machine wiring harnesses and the connectors for an open circuit or a short circuit. Repair the wiring and/or the connectors. Replace parts, if necessary. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".STOP