High Quality Diesel Fuel Nozzles DLLA155P179 / 0 433 171 158 0433171158 for Bosch Engine Parts

(1) Check the continuity of the cable connection

Check the continuity of the cable connection between the injection valves and the control unit (the circuit diagram for the pin assignment is required). In order to conduct this measurement, pull out the control unit connector and check the individual cables of the injection valve connectors to the control unit. Reference value: Approx. 0 ohms.

(2) Check the cable connection for a short circuit to frame

Check for a short circuit to frame in the cable connection between the injection valves and the control unit. With the control unit connector pulled out, measure the cables from the injection valve connectors to the control unit against vehicle ground.

(3) Check the continuity of the injection valve coils

Check the continuity of the injection valve coils. To do so, connect the ohmmeter between the two connection pins. Reference value: Approx. 15 ohms (note manufacturer specifications).

(4) Check the injection valve coils for a short circuit to frame

Check the injection valve coils for a short circuit to frame. For this purpose, check the continuity of each individual connection pin against the valve housing. Reference value: >30 MOhm.

On a stationary test stand, it is possible to test the spray pattern of the injection nozzles when they are disassembled. Depending on the device manufacturer, it may also be possible to clean the injection valves.