353-72547-0 Nissan ASSIST CORD, BLUE

Illustration 1 g00805584
Typical 3512 Primary ECM
Illustration 2 g00805578
Typical 3512 Secondary ECMNote: The Engine Control Switch (ECS) is mounted within an instrument panel that is located on the right side of the engine. The ECS is locked into the AUTO position with a pin. The pin must be removed in order to perform this test. After performing this test, ensure that the ECS is placed in the AUTO position and that the locking pin has been reinstalled.Test Step 1. Check for Connector Damage.
Turn the circuit breaker for the battery to the OFF position.
Turn the ECS to the OFF/RESET position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
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 of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring should be free of corrosion, of abrasion or of pinch points.Results:
OK - The connectors and wiring are okay. Proceed to test step 2.
Not OK - The connectors and/or wiring need repair.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Stop.Test Step 2. Check for LOGGED Diagnostic Codes.
Connect the Caterpillar Electronic Technician (ET).
Turn the circuit breaker for the battery to the ON position.
Turn the ECS to the STOP position.
Observe the diagnostic codes on the Cat ET.Expected Result:A CID-FMI from 1-05 to 12-05 or from 1-06 to 12-06 should not be logged.Results:
OK - A CID-FMI from 1-05 to 12-05 or from 1-06 to 12-06 is not logged. Proceed to test step 8.
Not OK - A CID-FMI from 1-05 to 12-05 or from 1-06 to 12-06 is logged. Proceed to test step 4.Test Step 3. Check the Harness for a Short to Engine Ground.
This engine uses high voltage to control the fuel injectors.Disconnect the fuel enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Turn the ECS to the OFF/RESET position.
Turn the circuit breaker for the battery to the OFF position.
Disconnect the primary ECM connector J2/P2. Disconnect the injector connectors J4/P4 through J15/P15.
Measure the resistance between the individual solenoid wires and engine ground at the primary ECM connector P2:For an engine with twelve cylinders, measure the resistance at the following points:
Measure the resistance between P2-5 and engine ground.
Measure the resistance between P2-11 and engine ground.
Measure the resistance between P2-12 and engine ground.
Measure the resistance between P2-16 and engine ground.
Measure the resistance between P2-17 and engine ground.
Measure the resistance between P2-18 and engine ground.
Measure the resistance between P2-21 and engine ground.
Measure the resistance between P2-22 and engine ground.
Measure the resistance between P2-26 and engine ground.
Measure the resistance between P2-27 and engine ground.
Measure the resistance between P2-28 and engine ground.
Measure the resistance between P2-31 and engine ground.
Measure the resistance between P2-32 and engine ground.
Measure the resistance between P2-33 and engine ground.
Measure the resistance between P2-34 and engine ground.
Measure the resistance between P2-37 and engine ground.
Measure the resistance between P2-38 and engine ground.
Measure the resistance between P2-40 and engine ground.Note: Repeat this test step for the Secondary ECM.Expected Result:The resistance should be greater than 20,000 Ohms.Results:
OK - The resistance is greater than 20,000 Ohms. Proceed to test step 4.
Not OK - The resistance is less than 20,000 Ohms. There is a problem in the wiring harness.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Stop.Test Step 4. Check for an Open in the Harness.
Use a suitable piece of wire to short socket-1 to socket-2 at each solenoid connector. Also short socket-1 to socket-4 at each diode assembly. Short socket-2 to socket-3 at each diode assembly.
Measure the resistance between the following solenoid wire pairs in the primary ECM connector P2:For an engine with twelve cylinders, measure the resistance at the following points:
Measure the resistance for SOLENOID 1 at P2-16 and P2-5.
Measure the resistance for SOLENOID 2 at P2-40 and P2-11.
Measure the resistance for SOLENOID 3 at P2-26 and P2-05.
Measure the resistance for SOLENOID 4 at P2-34 and P2-11.
Measure the resistance for SOLENOID 5 at P2-32 and P2-17.
Measure the resistance for SOLENOID 6 at P2-28 and P2-21.
Measure the resistance for SOLENOID 7 at P2-38 and P2-17.
Measure the resistance for SOLENOID 8 at P2-22 and P2-21.
Measure the resistance for SOLENOID 9 at P2-37 and P2-27.
Measure the resistance for SOLENOID 10 at P2-18 and P2-33.
Measure the resistance for SOLENOID 11 at P2-31 and P2-27.
Measure the resistance for SOLENOID 12 at P2-12 and P2-33.Note: Repeat this test step for the Secondary ECM.
Remove all wire jumpers.Expected Result:The resistance should be less than 10 Ohms.Results:
OK - The resistance is less than 10 Ohms. Proceed to test step 5.
Not OK - The resistance is greater than 10 Ohms. There is a problem in the wiring harness.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Stop.Test Step 5. Check the Diode Assembly.
Turn the circuit breaker for the battery to the OFF position.
Turn the ECS to the OFF/RESET position.
Set a voltmeter to the "diode check" setting. Remove the diode assembly J62 for Cylinder number 1.
Connect the positive lead to pin-1 and the negative lead to pin-4. The display should show a number less than 0.4 0.1.
Connect the positive lead to pin-2 and the negative lead to pin-3. The display should show a number less than 0.4 0.1.
Connect the negative lead to pin-1 and the positive lead to pin-4. The display should indicate an open circuit ".OL".
Connect the negative lead to pin-2 and the positive lead to pin-3. The display should indicate an open circuit ".OL".
Record the measurements of each pair. Continue testing the diode assemblies J63 through J73.Expected Result:The diode assembly should measure 0.4 0.1