34932 Mercruiser NUT, FRONT ANCHOR PIN

Illustration 1 g01087948
Schematic for ECM with serial number suffix IF
Illustration 2 g01087832
Schematic for ECM with serial number suffix KD, KH, or IE
Illustration 3 g01095114
Sensor locations (1) Injection actuation pressure sensor (2) Turbocharger outlet pressure sensor (3) Oil pressure sensor (4) Atmospheric pressure sensor (5) Turbocharger inlet pressure sensor
Illustration 4 g01087857
P1 ECM connector (P1-2) +5 V sensor supply (P1-3) Sensor common (P1-15) Turbocharger inlet pressure sensor (ECM suffix IF) (P1-17) Turbocharger inlet pressure sensor (ECM suffix KD, KH, IE)
Illustration 5 g01087858
P2 ECM connector (P2-2) +5 V sensor supply (P2-3) Sensor common (P2-14) Atmospheric pressure sensor (P2-24) Oil pressure sensor (P2-27) Injection actuation pressure sensor (P2-40) Turbocharger outlet pressure sensor (P2-41) +5 V supply for the oil pressure sensor (P2-42) Sensor common
Illustration 6 g01094844
Terminals for sensorsTest Step 1. Inspect Electrical Connectors and Wiring
Thoroughly inspect the ECM J1/P1 and J2/P2 connectors. Inspect all of the connectors that are associated with the circuit.Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the +5 V sensor supply.Refer to Illustration 4.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the harness and wiring for abrasion and for pinch points from the sensors back 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 - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors and/or wiring.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 problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the electronic service tool to the service tool connector.
Turn the keyswitch to the ON position.
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:One of the following diagnostic codes is active:
262-03
262-04 Results:
OK - A 262-03 diagnostic code is active. Proceed to Test Step 4.
OK - A 262-04 diagnostic code is active. Proceed to Test Step 3.
Not OK - No diagnostic code is active.Repair: The problem is no longer present. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 3. Disconnect the +5 V Sensors while you Monitor the Active Diagnostic Codes
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.
Disconnect the following sensors at the sensor connector:
Engine oil pressure sensor
Injection actuation pressure sensor
Turbocharger outlet pressure sensor
Atmospheric pressure sensor
Right turbocharger inlet pressure sensor
Wait for 15 seconds after each sensor is disconnected. Check for an active diagnostic code on the electronic service tool.Expected Result:The 262-04 diagnostic code deactivates.Results:
OK - The 262-04 diagnostic code deactivates. The diagnostic code is not active after a specific sensor is disconnected.Repair: Reconnect the sensor that is suspected of causing the problem. If the problem returns after the reconnection of the sensor, disconnect the sensor. If the problem disappears after the disconnection of the sensor, replace the sensor. Reconnect all wires to the original configuration. Clear all diagnostic codes. Verify that the repair eliminates the problem.STOP
Not OK - The 262-04 diagnostic code stays active. Leave the sensors disconnected. Proceed to Test Step 4.Test Step 4. Check the +5 V Supply Wire for a Short to Engine Ground or a Short to another Wire in the Harness
Turn the keyswitch to the OFF position.
Disconnect the J1/P1 ECM connector and the J2/P2 ECM connector.
Leave the sensors disconnected at the sensor connectors.Note: Wiggle the harness during the following measurements in order to reveal any intermittent short condition.
Measure the resistance from the ECM connector P1-2 (+5 V Supply) to every terminal on ECM connector P1 and ECM connector P2. Measure the resistance from the ECM connector P1-2 to the ECM ground strap.
Measure the resistance from the ECM connector P2-2 (+5 V Supply) to every terminal on ECM connector P2 and ECM connector P1. Measure the resistance from the ECM connector P2-2 to the ECM ground