825295 Mercury BODY-OIL PRESSURE RELIEF

Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
336-2 Engine Control Switch erratic, intermittent, or incorrect The inputs from the start/run/stop switch are in a different state. The code is logged. The Electronic Control Module (ECM) receives two input signals from the start/run/stop switch. The two input signals should have the same logic level. If two different signals are detected during the powerup, the ECM will determine that one of the signals is incorrect. The duplication of the signals permits the ECM to know if there is a problem in the wiring.When both of the input signals are high or open, the ECM assumes that the start/run/stop switch is in the STOP position. When both of the input signals are low or shorted to the −Battery terminal, the ECM assumes that the start/run/stop switch is in the START position. After the start/run/stop switch is turned to the START position, the ECM will initiate the starting sequence. The ECM will energize the prelube system if the prelube system is available and activated. After the prelube cycle is completed the ECM will energize the starting solenoids for the starting motors. If both of the signals go high or open while the engine is running, the engine will stop.If the engine is running and one of the inputs from the start/run/stop switch changes states, the ECM will ignore the inputs from the start/run/stop switch until power is cycled to the ECM. If this occurs, you must use the emergency stop switch or you must disconnect the power to the ECM in order to shut down the engine.If the inputs from the start/run/stop switch are in opposite states at the beginning of a crank cycle, the ECM will not initiate the crank cycle. If this condition occurs, the engine may be started by using the manual crank switch. If you start the engine with the manual crank switch, you must use the emergency stop switch or you must disconnect the power to the ECM in order to shut down the engine. A diagnostic code will be logged and a diagnostic code will be active for this problem. The diagnostic code for this problem will be active until the ECM is powered down.
Illustration 1 g01211167
Typical schematic
Illustration 2 g01211492
P1 ECM connector
(P1-5) Digital return
(P1-21) Start/Run/Stop switch 1
(P1-22) Start/Run/Stop switch 2
Illustration 3 g01211494
Customer connector
(Terminal 9) Digital return
(Terminal 23) Start/Run/Stop switch 1
(Terminal 24) Start/Run/Stop switch 2 Test Step 1. Inspect Electrical Connectors and Wiring
Remove electrical power from the ECM.
Thoroughly inspect the ECM connectors. Inspect all of the other connectors for the circuit. Refer to 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. Refer to Troubleshooting, "Inspecting Electrical Connectors" for details.
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, and of pinch points.Results:
OK - The connectors and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring