0389972 JOHNSON LOCATING BRACKET, Rear starboard

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Schematic for the 5 volt supplyTest Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
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Left side view (1) Injection actuation pressure sensor (2) Boost pressure sensor (3) Atmospheric pressure sensor (4) Fuel pressure sensor (5) Engine oil pressure sensor (6) J2/P2 ECM connector (7) J1/P1 ECM connector
Thoroughly inspect connectors (6) and (7). Thoroughly inspect the connectors for each pressure sensor. Refer to Troubleshooting, "Electrical Connectors - Inspect".
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P2 terminals that are associated with the 5 volt supply for the pressure sensors (P2-2) +5 VDC (P2-3) Return
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P1 terminals that are associated with the 5 volt supply for the pressure sensors (P1-2) +5 VDC (P1-3) Return
Illustration 5 g01128703
J61/P61 terminals that are associated with the 5 volt supply for the pressure sensors (14) +5 VDC (15) Return
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Connectors for the sensors (A) Supply (B) Return (C) Signal
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the pressure sensor supply.
Check the torque of the allen head screw on the ECM connectors and the customer connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from each sensor back 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 and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - The connectors and/or wiring are not OK.Repair: Repair the wiring and/or the connectors. 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 repair eliminates the problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Turn the keyswitch to the ON position.
Observe the "Active Diagnostic" screen on Cat ET. Wait at least 15 seconds so that any codes may become active. Look for these codes:
262-03
262-04Expected Result:One of the above codes is active.Results:
Active 262-03 code - An 262-03 diagnostic code is active. Proceed to Test Step 3.
Active 262-04 code - An 262-04 diagnostic code is active. Proceed to Test Step 4.
No active codes - None of the above codes are active.Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, "Troubleshooting Without a Diagnostic Code".If the engine is running properly at this time, there may be an intermittent problem in a harness that is causing the codes to be logged. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 3. Check the Voltage on the +5 V Supply Wire
Turn the keyswitch to the OFF position.
Disconnect the harness connectors for the following sensors:
Injection actuation pressure sensor
Boost pressure sensor
Atmospheric pressure sensor
Fuel pressure sensor
Engine oil pressure sensor
Auxiliary pressure sensor
Turn the keyswitch to the ON position.Note: Be sure to wiggle the harness during the following measurements in order to reveal an intermittent condition.
Measure the voltage between terminals A and B at each sensor connector on the engine harness.Expected Result:Each voltage measurement is 5.0 0.2 VDC.Results:
OK - Each voltage measurement is 5.0 0.2 VDC. The sensors are receiving the correct voltage.Repair: Connect all of the sensor connectors. Clear all diagnostic codes. Check for active diagnostic codes. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - At least one voltage measurement is not 5.0 0.2 VDC. There is a problem with the wiring or with the ECM. Proceed to Test Step 5.Test Step 4. Disconnect the +5 V Pressure Sensors and Check for Active Diagnostic Codes
Disconnect the following sensors one at a time. Wait for 15 seconds after you disconnect each sensor. Check for the active 262-04 diagnostic code again.
Injection actuation pressure sensor
Boost pressure sensor
Atmospheric pressure sensor
Fuel pressure sensor
Engine oil pressure sensor
Auxiliary pressure sensorExpected Result:The 262-04 diagnostic code deactivates when a particular sensor is disconnected.Results:
OK - The 262-04 diagnostic code deactivates when a particular sensor is disconnected.Repair: Connect the suspect sensor. If the code returns, replace the sensor.Connect all of the connectors. Verify that the problem is resolved.STOP
Not OK - The 262-04 diagnostic code remains after all of the sensors are disconnected. Leave the sensors disconnected. Proceed to Test Step 5.Test Step 5. Check the +5 V Supply Wire for a Short
Turn the keyswitch to the OFF position.
Disconnect the J2/P2 ECM connector. Disconnect the J1/P1 ECM connector.
Verify that all of the pressure sensors are disconnected.Note: Wiggle the harness during the f