40088 20 Mercury SCREW, (M6 x 20), PUMP AND MOTOR

Illustration 1 g00884730
Intake manifold pressure sensor
Illustration 2 g01331418
Engine oil pressure sensor
(1) Sensor Common
(2) 5 Volt Sensor Supply
(3) Engine Oil Pressure Signal
Illustration 3 g01331419
Schematic of the 5 volt supply for the engine pressure sensors
Test Step 1. Inspect Electrical Connectors And Wiring.
Thoroughly inspect the following connections:
P1/J1 ECM engine harness connector
P20/J20 MIC machine harness connector
P200/J200 Intake manifold pressure sensor
P201/J201 Engine oil pressure sensorRefer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 4 g01331420
(14) Intake manifold pressure
(24) Engine oil pressure
(26) Sensor VRef +5V
(34) Engine sensor common
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the +5 Volt sensor supply:
P1-14 Intake Manifold Pressure
P1-24 Engine Oil Pressure
P1-26 Sensor VRef +5V
P1-34 Engine Sensor Common Refer to Illustration 4.
Check the ECM connector (Allen head screw) for the correct torque of 6.0 N m (55 lb in).
Check the harness and wiring for abrasion and pinch points from the sensors to the ECM. Expected Result:All connectors, pins and sockets should be completely coupled and/or inserted and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the fault.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the electronic service tool to the diagnostic connector.
Turn the keyswitch to the ON position. Do not start the engine.
Monitor the active diagnostic code screen on the electronic service tool. Check and record any active diagnostic codes. Note: Wait at least 15 seconds in order for the diagnostic codes to become active.Expected Result:Select the condition of the following codes:
262-03 5 Volt Sensor DC Power Supply voltage above normal
262-04 5 Volt Sensor DC Power Supply voltage below normalResults:
Active - Proceed to Test Step 3.
Logged ONLY - Proceed to Test Step 5.
Not Active or Logged - The +5 Volt supply is operating correctly.STOPTest Step 3. Disconnect The ECM Engine Harness Connector From The ECM
Connect the electronic service tool to the diagnostic connector.
Batteries give off flammable fumes which can explode.To avoid injury or death, do not strike a match, cause a spark, or smoke in the vicinity of a battery.
Do not connect the bypass harness to the battery until the 10 Amp in-line fuse has been removed from the Battery + line. If the fuse is not removed before connection to the battery, a spark may result.
Turn the keyswitch to the OFF position.
Illustration 5 g01625057
Refer to Troubleshooting, "Engine Wiring Information" for wiring instructions.
Disconnect J1/P1 ECM engine harness connector .
Connect the J1 bypass harness to the ECM connector.
Remove the fuse F1 from the bypass harness and from the battery circuit.
Connect the unswitched battery cables directly to the battery terminals.
Install the F1 fuse to the in-line fuse holder. Note: The bypass harness directly connects the keyswitch circuit to the ECM. The ECM will have power until the connection to the battery + cable is disconnected. Remove the "F1" fuse from the in-line fuse holder in order to isolate the ECM.
Turn the keyswitch to the ON position. Do not start the engine.
Access the active diagnostic code screen on the electronic service tool. Check for one of the following active diagnostic codes:
262-03 5 Volt Sensor DC Power Supply voltage above normal
262-04 5 Volt Sensor DC Power Supply voltage below normalNote: When ECM engine harness connector J1/P1 is disconnected and the keyswitch is in the ON position, open circuit diagnostic codes will be "Active" or "Logged" for all of the engine sensors. This is normal.Expected Result:The +5 Volt diagnostic code is active when the ECM engine harness connector is disconnected.Results:
OK - The +5 Volt diagnostic code is active when the ECM engine harness connector is disconnected.Repair: Temporarily connect a test ECM to the engine J20/P20. The test ECM should be programmed with the same values and with the same parameters as the suspect ECM. Recheck for a +5 Volt diagnostic code. If a +5 Volt diagnostic code is not active, the original ECM is faulty. Reconnect the original ECM and check the +5 Volt diagnostic codes. If a +5 Volt diagnostic code becomes active, replace the ECM. If the ECM is replaced, the new ECM should be programmed with the same values and with the same parameter as the suspect ECM.STOP
Not OK - The +5 Volt sensor diagnostic code is no longer active when the harness is disconnected. Either the harness or a sensor that is attached to the harness is causing the problem. Reconnect the ECM engine harness connector. Proceed to Test Step 4.Test Step 4. Disconnect The +5 Volt Sensors While Active Diagnostic Codes A