019-057   Injector Solenoid

The injector solenoid circuits are the supply and return wires in the actuator harness. The wires go from the ECM connector to a 12-pin connector in the rocker lever housing. The 12-pin connector connects the external and internal actuator harness. The internal harness goes to each injector.

The pins of the circuits are as follow:

Disconnect the actuator harness connector from the ECM and check for damaged pins. Refer to Procedure

019-043.

The injector solenoid circuits are the supply and return wires in the actuator harness to each of the injector solenoids. The wires go from the actuator harness at the ECM to six individual pass-through connectors along the side of the rocker box housing. The pass-through connectors are used to connect the actuator harness to the injector solenoid wires that connect to each injector solenoid.

The pass-through connector is a plastic 90-degree connector within the wall of the rocker box housing. A mating 2-pin Deutsch connector of the injector solenoid wires connects to the pass-through inside the rocker box housing. Another mating 2-pin Deutsch connector of the actuator harness connects to the pass-through outside the rocker box housing.

The pins of the circuits are as follow:

Disconnect the actuator harness connector from the ECM and check for damaged pins. Refer to Procedure

019-043.

The resistance value of the injector solenoid circuit is very low. The solenoid resistance is also temperature sensitive. To read an accurate resistance value, the resistance of the multimeter

must be subtracted from the total resistance of the injector solenoid circuit.

CAUTION  Use a multimeter for this procedure. Use Cummins multimeter, Part Number 3377161, or a meter with the same accuracy of ±1/2 percent.

Attach the test leads to the multimeter probes. Turn the multimeter ON. Set the meter range to the lowest ohm scale. Measure the resistance across the two test leads. This is the multimeter resistance value that will be subtracted from the injector solenoid resistance value.