881974 Mercury BUMPER

Illustration 1 g02659618
Schematic for the data links
Test Step 1. Inspect the Electrical Connectors and the Wiring
Turn the main disconnect switch to the OFF position.
Thoroughly inspect the ECM connector J1/P1 and J2/P2. Inspect all of the connectors to other modules on the data links. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 2 g02721290
Location of the J1/P1 and the J2/P2 ECM connectors (typical engine view)
(1) J1/P1 ECM connector
(2) J2/P2 ECM connector
Illustration 3 g02721158
P2 ECM connector
(P2-11) CAN data link −
(P2-12) CAN data link +
(P2-23) Shield for the CAN data link
Illustration 4 g02748936
Terminal locations at the P1 ECM connector that are for the data links
(P1-8) Cat Data Link +
(P1-9) Cat Data Link −
(P1-34) Global CAN data link −
(P1-42) Global CAN shield
(P1-48) +Battery
(P1-50) Global CAN data link +
(P1-52) +Battery
(P1-53) +Battery
(P1-55) +Battery
(P1-57) +Battery
(P1-61) −Battery
(P1-63) −Battery
(P1-65) −Battery
(P1-67) −Battery
(P1-69) −Battery
(P1-70) Keyswitch
Illustration 5 g01444702
ECM service tool connector
(A) +Battery
(B) −Battery
(C) Local CAN shield
(D) Cat Data Link +
(E) Cat Data Link −
(F) Local CAN data link −
(G) Local CAN data link +
Illustration 6 g01355248
Terminal locations at the termination resistors
(A) CAN data link +
(B) CAN data link −
(C) Shield
Illustration 7 g01559973
Terminal locations at the control box for the engine interface connector
(Terminal 8) Cat Data Link +
(Terminal 9) Cat Data Link −
(Terminal 34) CAN data link −
(Terminal 42) CAN data link shield
(Terminal 50) CAN data link +
Illustration 8 g02749016
Terminal locations at the left rail connector
(Terminal 18) CAN data link +
(Terminal 19) CAN data link −
(Terminal 21) CAN data link shield
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, "Electrical Connectors - Inspect" for details.
Check the harness and the wiring for abrasion and for pinch points. Expected Result:All of the connectors, pins, and sockets are coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be OK. If bypassing the wiring is applicable, proceed to Test Step 2. If bypassing the wiring is not applicable, proceed to Test Step 3.
Not OK - The connectors and/or wiring are 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 coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Bypass the Wiring for the Data Link (if applicable)
Connect the 328-2292 Harness (ENGINE ECM BYPASS) to the J1 connector, to the 217-0113 Main Harness, and to the battery.
Try to establish communication between Cat ET and the ECM. Expected Result:Cat ET and the ECM communicate.Results:
OK - Cat ET and the ECM communicate.Repair: Cat ET and the ECM communicate when the bypass harness is installed. However, communication cannot be established via the engine wiring. Disconnect the electrical connector from each of the control modules that is on the specific data link one at a time to isolate the problem. Try to establish communication between Cat ET and the ECM after disconnecting each module.The problem is in the control module if disconnecting the module allows Cat ET and the ECM to communicate. If a module is suspect, replace the module. Verify that the problem is resolved.The control module is OK if the problem remains when the module is disconnected. Proceed to Test Step 3.