TUBE AS 4161782 - Caterpillar

Illustration 7 g01622856
Connector locations
(1) A-C1/E-C2/E-C1 Right hand cross over harness
(2) A-C2/J-C2/J-C1 Right hand cross over harness
(3) A-C90/P-C1 Connectors for the power distribution panel
(4) A-C91/P-C2 Connectors for the power distribution panel
(5) A-C60 Connector for the prelube motor
(6) A-C92/F-C1/F-C2/G-C6 Connectors for a RH Control panel
(7) C-C22 Primary ECM connector P2
(8) C-C15 Primary ECM connector P1
(9) C-C28 Secondary ECM connector P2
(10) C-C29 Secondary ECM connector P1
(11) C-C47 Connector for the power relay panel
(12) C-C17/F-C1/F-C2/G-C6 Connectors for a LH Control panel
(13) C-C18/(TB-C1 customer or L-C1/L-C2 EMCP 3) connectors
(14) C-C2/J-C1/J-C2 Left hand cross over harness
(15) C-C1/E-C1/E-C2 Left hand cross over harness
Illustration 8 g01234146
Location of ECM connectors
Illustration 9 g01094844
Sensor connector
(Pin A) Sensor supply
(Pin B) Sensor return
(Pin C) Signal Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the ECM.
Thoroughly inspect the J1/P1 ECM connector and the J2/P2 ECM connector. 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 circuit.
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
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 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 - 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 Caterpillar Electronic Technician (ET) to the service tool connector.
Restore electrical power to the ECM.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Look for the following diagnostic codes:
262-3
262-4
263-3
263-4 Note: Wait at least 30 seconds in order for the diagnostic codes to become active.Expected Result:No diagnostic codes are active.Results:
OK - No diagnostic code is active.Repair: The problem is no longer present. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - Either the 262-3 or 262-4 diagnostic code is active at this time. Proceed to Test Step 3.
Not OK - Either the 263-3 or 263-4 diagnostic code is active at this time. Proceed to Test Step 5.Test Step 3. Disconnect the 5 Volt Sensors while you Monitor the Active Diagnostic Codes
Monitor the active diagnostic code screen on Cat ET while you disconnect each 5 Volt sensor at the sensor connector. Check for an active 262-3 code or an active 262-4 code. Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
Disconnect the following sensors one at a time:
Aftercooler temperature sensor
Atmospheric pressure sensor
Coolant pressure sensor
Coolant temperature sensor
Crankcase pressure sensor
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