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5. (K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (K370) Fuel Pressure Solenoid Control Is the resistance below 10.0 ohms? Yes >> Go to 6 No >> Repair the (K370) Fuel Pressure Solenoid Control circuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 6. FUEL PRESSURE SOLENOID Connect the Engine Control Module (ECM) connector. Turn the ignition on. With the scan tool, actuate the Fuel Pressure Solenoid (Rail Pressure Actuator) to 100%. Using a 12 volt test light connected to 12 volts, check the (K370) Fuel Pressure Solenoid Control circuit in the Fuel NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connec- NOTE: The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active Using a 12 volt test light connected to 12 volts, check the (K370) Fuel Pressure Solenoid Control circuit in the Fuel NOTE: The test light should not be illuminated. NOTE: The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active Is the test light illuminated and bright with the actuation at 100% and not illuminated with the actuation Yes >> Replace the Fuel Pressure Solenoid in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 7 9 - 1104 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |