Continuity Check
NOTE: This step is only required for engines with rocker lever cover mounted crankcase breathers.
NOTE: The following tests must be conducted with the injector wires disconnected from the injectors.
Use an appropriate test lead and multimeter. Check the continuity/resistance of each injector wire. The multi meter
must show a measurement of 10 ohms or less (closed circuit). For pin number/letter references and wiring
schematics, use the ISB CM2150 Engine Wiring Diagram, Bulletin 4021572.
If the measured value is more than 10 ohms, there is an open circuit in the in the wire. Replace the rocker lever
cover gasket.
Short Circuit from Pin to Pin – Check
NOTE: This step is only required for engines with rocker lever cover mounted crankcase breathers.
Use an appropriate test lead and multimeter. Measure the resistance from each injector wire pin to all other pins in
the connector. Repeat this step for the second connector.
The multimeter must show a measurement of 100k ohms or more (open circuit).
If the measured value is less than 100k ohms, there is a short circuit between the signal wire and any other pin that
measured a closed circuit. Replace the rocker lever cover gasket.
