Switch circuits may have problems such as faulty wiring, faulty switches, or faulty connectors. Use the following diagnostic procedures in order to diagnose problems with these switch circuits and repair these switch circuits:
- "Trolling mode switch"
- "Slow vessel mode switch"
- "Maintenance clear switch"
- "Trip clear switch"
- "Remote shutdown switch"
- "Synchronize switch 1"
- "Synchronize switch 2"
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| Illustration 1 | g01230589 |
Schematic for the switch inputs | |
Test Step 1. Check the Electrical Connectors and the Wiring
- Remove the electrical power from the ECM.
- Thoroughly inspect connectors (1), and (2). Thoroughly inspect the connections for the suspect switch. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
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| Illustration 2 | g01230043 |
Engine components for the switch inputs (1) J1/P1 ECM connector (2) J61/P61 customer connector | |
- Perform a 45 N (10 lb) pull test on each of the wires in the circuit for the suspect switch.
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| Illustration 3 | g01149211 |
P1 terminals for the various switches (P1-22) "Remote shutdown switch" (P1-23) "Maintenance clear switch" (P1-40) "Trip clear switch" (P1-41) "Trolling mode switch" (P1-59) "Slow vessel mode switch" (P1-63) −Battery (P1-35) "Synchronize switch 1" (P1-44) "Synchronize switch 2" | |
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| Illustration 4 | g01180881 |
J61/P61 terminals that are associated with the switch inputs (3) −Battery (19) "Trip clear switch" (36) "Remote shutdown switch" (37) "Trolling mode switch" (38) "Slow vessel mode switch" (39) "Maintenance clear switch" (34) "Synchronize switch 1" (35) "Synchronize switch 2" | |
- Check the allen head screw on the connector for the Electronic Control Module (ECM) for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
- Check the allen head screw on the customer connector for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
- Check the harness and wiring for abrasions and for pinch points from the battery to the ECM.
Expected Result:
All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion or of pinch points.
Results:
- OK - The wiring and connectors are OK. Proceed to Test Step 2.
- Not OK - There is a problem with the wiring and/or a connector.
Repair: Repair the wiring and/or the connector. Replace parts, if necessary. Ensure that all of the seals are properly connected. Verify that the repair eliminates the problem.
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Test Step 2. Test the Switch for Proper Operation
- Disconnect the P1 connector.
- Refer to Table 1. Determine the P1 terminal for the suspect switch.
Show/hide table
Table 1 Terminals for the Switch Inputs Name of the Switch P1 Terminals J61/P61 Terminals "Trolling mode switch" 41 37 "Slow vessel mode switch" 59 38 "Maintenance clear switch" 23 39 "Trip clear switch" 40 19 "Remote shutdown switch" 22 36 "Synchronize switch 1" 35 34 "Synchronize switch 2" 44 35
- Connect a meter lead to the P1 terminal for the suspect switch. Connect the other meter lead to engine ground.
- Measure the resistance between the P1 terminal for the suspect switch and engine ground.
Note: Wiggle the harnesses during the following measurements in order to reveal any intermittent conditions.
- Activate the switch and measure the resistance again.
Expected Result:
When the switch is not activated, the resistance measurement indicates an open circuit. When the switch is activated, the resistance measurement indicates a short circuit.
Results:
- OK - When the switch is not activated, the resistance measurement indicates an open circuit. When the switch is activated, the resistance measurement indicates a short circuit. The switch is operating correctly. The wiring does not have a short circuit or an open circuit.
Repair: Operate the engine and check the switch for proper operation.If the switch does not operate correctly, there may be a short circuit between the circuit for the suspect switch and another circuit. Carefully reinspect the components. Refer to the diagnostic functional test Troubleshooting, "Electrical Inspectors - Inspect". Locate the short circuit and make repairs.
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- Not OK - Both resistance measurements indicate an open circuit or both resistance measurements indicate a short circuit. There is a problem with the circuit for the switch.
Repair: The problem could be in the switch, in the wiring, or in a connector.Carefully reinspect the components. Refer to the diagnostic functional test Troubleshooting, "Electrical Inspectors - Inspect".If the inspection does not identify the faulty component, replace the switch and test the switch again.If the problem is not resolved, repair the wiring or the connector. Replace parts, if necessary. Verify that the problem is resolved.
STOP