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3. (X635) BOOST PRESSURE SERVO MOTOR CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Engine Control Module (ECM) harness connector. Measure the resistance between ground and the (X635) Boost Pressure Is the resistance above 1000.0 ohms? Yes >> Go to 4 No >> Repair the (X635) Boost Pressure Servo Motor Control cir- cuit for a short to ground. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 4. (X635) BOOST PRESSURE SERVO MOTOR CONTROL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (X635) Boost Pressure Servo Motor Con- Is the resistance below 10.0 ohms? Yes >> Go to 5 No >> Repair the (X635) Boost Pressure Servo Motor Control cir- cuit for an open circuit or high resistance. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 9 - 1080 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |