Turn off the ignition of the car and set the resistance value on the multimeter. If the meter reading is out of tolerance (OL), there is an open circuit between the PCM and the sensor that needs to be located and repaired. If the counter reads a numeric value, there is continuity. Connect a meter between the ground terminal of the fuel pressure sensor connector and chassis ground. With the vehicle ignition OFF, use a resistor DMM to test the continuity to ground. However, PCMs rarely fail, so it is advised to double check your work up to this point. If there is no voltage reference from the PCM, the PCM is probably defective. Connect the positive lead of the meter to the reference terminal on the PCM and the negative lead to ground. To do this, turn on the ignition and set the meter to constant voltage. If everything is ok up to this point, you will want to check if power is coming out of the PCM.
If there is no reference signal, connect a meter set to ohms (ignition off) between the reference terminal on the fuel pressure sensor and the reference voltage terminal on the PCM. To do this, connect the Meter negative lead to ground and the Meter positive lead to the B + sensor terminal on the harness side of the connector. With the vehicle ignition on, use a DC voltage setting DMM to check the reference voltage (typically 5 volts) from the PCM. Check part of the reference voltage circuit. Autozone offers free online repair guides for many vehicles and ALLDATA offers a one-car subscription.
Check wiringīefore proceeding, you need to consult the factory wiring diagrams to determine which wires are which. To accurately test the system, you need to refer to the manufacturer's diagnostic flowchart.
#DODGE SYMPTOMS OF LOW VOLTAGE RAM PRESSURE FUEL CODE#
The following is a generalized procedure as the testing of this code differs from vehicle to vehicle.
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