83444M Mariner KEY, WOODRUFF

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Schematic for the maintenance due lampThe ECM provides a path to ground for the lamp. When the ECM completes the ground circuit for the lamp, the lamp will illuminate.Test Step 1. Check for Normal Operation of the Maintenance Due Lamp
Monitor the maintenance due lamp.
Turn the keyswitch to the ON position. The maintenance due lamp should turn on for five seconds. Then, the lamp should turn off.Note: The lamp will stay on if a condition that requires maintenance is active.Expected Result:The maintenance due lamp turns on and the maintenance due lamp turns off per the above description.Results:
OK - The maintenance due lamp appears to operating correctly at this time.STOP
Not OK - The maintenance due lamp is not functioning correctly. Proceed to Test Step 2.Test Step 2. Inspect the Electrical Connectors and the Wiring
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Turn the keyswitch to the OFF position.
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Left side engine view (typical example) (1) J1/P1 ECM connector
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Left side engine view (typical example) (2) P61 Customer connector
Thoroughly inspect connectors (1) and (2). Inspect the connections on the maintenance due lamp. Refer to Troubleshooting, "Electrical Connectors - Inspect".
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P1 terminals that are associated with the maintenance due lamp (P1-30) Maintenance due lamp
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J61 and P61 terminals that are associated with the maintenance due lamp (13) Maintenance due lamp
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the maintenance due lamp.
Check the allen head screw on the ECM connectors and the customer connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasions and for pinch points from the maintenance due lamp 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 or of pinch points.Results:
OK - The connectors and the wiring are OK. Proceed to Test Step 3.
Not OK - There is a problem with a connector and/or the wiring.Repair: Repair the connector and/or the wiring. 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 problem is resolved.STOPTest Step 3. Test the Maintenance Due Lamp Circuit at the ECM Connector
Disconnect the J1/P1 ECM connector.
Connect a jumper wire between terminal P1-30 and engine ground.
Turn the keyswitch to the ON position. Observe the maintenance due lamp.
Remove the jumper wire and observe the maintenance due lamp.Expected Result:The maintenance due lamp turned on while the jumper was connected. The maintenance due lamp turned off when the jumper was removed.Results:
OK - The maintenance due lamp turned on while the jumper was connected. The maintenance due lamp turned off when the jumper was removed. The maintenance due lamp circuit is functioning properly. Proceed to Test Step 6.
Not OK - The maintenance due lamp did not turn on. There is a problem with the circuit for the maintenance due lamp. Proceed to Test Step 4.Test Step 4. Test the Circuit at the Maintenance Due Lamp
Disconnect wire F424-YL from the maintenance due lamp.
Connect a jumper wire between the lamp's open terminal and engine ground.
Turn the keyswitch to the ON position. Observe the maintenance due lamp.
Disconnect the jumper wire and observe the maintenance due lamp.Expected Result:The maintenance due lamp turns on while the jumper is connected. The maintenance due lamp turns off when the jumper is disconnected.Results:
OK - The maintenance due lamp turned on while the jumper wire was connected. The maintenance due lamp turned off when the jumper wire was removed. The +Battery side of the circuit for the maintenance due lamp is functioning properly. There is a problem with the return wire between the maintenance due lamp and the P1 connector.Repair: Repair wire F424-YL between the maintenance due lamp and terminal P1-30. Verify that the problem is resolved.STOP
Not OK - The maintenance due lamp did not turn on when the jumper wire was connected. There is a problem with the +Battery side of the circuit for the maintenance due lamp. Proceed to Test Step 5.Test Step 5. Check the Voltage from the Keyswitch to the Maintenance Due Lamp
Turn the keyswitch to the OFF position.
Remove the wire from the terminal R of the keyswitch.
Turn the keyswitch to the ON position.
Measure the voltage on terminal B of the keyswitch to engine ground.
Measure the voltage on terminal R of the keyswitch to engine ground.
Turn the keyswitch to the OFF position.Expected Result:Voltage is present on terminal B and terminal R at the keyswitch.Results:
OK - Voltage is present on terminal B and terminal R at the keyswitch.Repair: If voltage is present on terminal R, repair the wire between the keyswitch and the maintenance due lamp. Verify that the breaker is not tripped. Return all wiring to the original configuration. Verify that the problem is resolved.STOP
Not OK - Voltage is not present on terminal B at the keyswitch.Repair: If voltage is not present on terminal B, repair the wire between the +Battery and the keyswitch. Check the battery's no-load voltage. Return all wiring to the original configuration. Verify that the problem is resolved.STOP
Not OK - Voltage is not present on