MIRROR 4543607 - Caterpillar

Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for the engine speed sensor.
Check the harnesses and the wiring for abrasion and for pinch points from the inlet manifold pressure sensor to the control module.Expected Result:The connectors, pins, and sockets are connected properly. The connectors and the wiring do not have corrosion, abrasion, or pinch points.Results:
OK - The components are in good condition with proper connections. Proceed to Test Step 2.
Not OK - The components are not in good condition and/or at least one connection is improper.Repair: Perform the necessary repairs and/or replace parts, if necessary.STOPTest Step 2. Check for an Open Circuit
Disconnect the connectors for the inlet manifold pressure sensor.
Disconnect the following connectors:
J1/P1 connectors
EIS connector
Measure the resistance of each wire that runs between the inlet manifold pressure sensor and the control module.
If the engine is equipped with the air/fuel ratio control, measure the resistance between the points that are listed in Table 2. During each measurement, wiggle the wires in the harness in order to check for an intermittent problem. Be sure to wiggle